More MIPS64 chainsawing.

34 files changed, 3284 insertions, 46 deletions

diff --git a/arch/mips64/Makefile b/arch/mips64/Makefile
index 4ae372e30..3e4df1276 100644
--- a/arch/mips64/Makefile
+++ b/arch/mips64/Makefile
@@ -1,4 +1,4 @@
-# $Id$
+# $Id: Makefile,v 1.1 1999/08/18 23:37:46 ralf Exp $
 #
 # This file is subject to the terms and conditions of the GNU General Public
 # License.  See the file "COPYING" in the main directory of this archive
@@ -34,8 +34,7 @@ endif
 # crossformat linking we rely on the elf2ecoff tool for format conversion.
 #
 CFLAGS		+= -mabi=64 -G 0 -mno-abicalls -fno-pic -pipe
-LINKFLAGS	+= -G 0
-LINKFLAGS	= -static # -N
+LINKFLAGS	+= -G 0 -static # -N
 MODFLAGS	+= -mlong-calls
 
 ifdef CONFIG_REMOTE_DEBUG
@@ -67,41 +66,34 @@ endif
 #
 # Board-dependent options and extra files
 #
-ifdef CONFIG_IP22
-LIBS          += arch/mips/sgi/kernel/sgikern.a arch/mips/arc/arclib.a
-SUBDIRS       += arch/mips/sgi/kernel arch/mips/arc
+ifdef CONFIG_SGI_IP22
+LIBS          += arch/mips64/sgi-ip22/sgikern.a arch/mips64/arc/arclib.a
+SUBDIRS       += arch/mips64/sgi-ip22 arch/mips64/arc
 #
 # Set LOADADDR to >= 0x88069000 if you want to leave space for symmon,
 # 0x88002000 for production kernels.  Note that the value must be
 # 8kb aligned or the handling of the current variable will break.
 #
 LOADADDR      += 0x88002000
-HOSTCC        = cc
 endif
 
 #
-# Choosing incompatible machines durings configuration will result in
-# error messages during linking.  Select a default linkscript if
-# none has been choosen above.
+# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
+# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
+# convert to ECOFF using elf2ecoff.
 #
-ifndef LINKSCRIPT
-ifndef CONFIG_CPU_LITTLE_ENDIAN
-LINKSCRIPT    = arch/mips/ld.script.big
-else
-LINKSCRIPT    = arch/mips/ld.script.little
-endif
+ifdef CONFIG_BOOT_ELF32
+CFLAGS += -Wa,-32
+LINKFLAGS += -T arch/mips64/ld.script.elf32
 endif
-LINKFLAGS     += -T $(word 1,$(LINKSCRIPT))
 
-ifdef LOADADDR
-LINKFLAGS     += -Ttext $(word 1,$(LOADADDR))
-endif
+LINKFLAGS += -Ttext $(LOADADDR)
 
-HEAD := arch/mips/kernel/head.o arch/mips/kernel/init_task.o
+HEAD := arch/mips64/kernel/head.o arch/mips64/kernel/init_task.o
 
-SUBDIRS := $(addprefix arch/mips/, tools) $(SUBDIRS) $(addprefix arch/mips/, kernel mm lib)
-CORE_FILES := arch/mips/kernel/kernel.o arch/mips/mm/mm.o $(CORE_FILES)
-LIBS := arch/mips/lib/lib.a $(LIBS)
+SUBDIRS := $(addprefix arch/mips64/, tools) $(SUBDIRS) $(addprefix arch/mips64/, kernel mm lib)
+CORE_FILES := arch/mips64/kernel/kernel.o arch/mips64/mm/mm.o $(CORE_FILES)
+LIBS := arch/mips64/lib/lib.a $(LIBS)
 
 MAKEBOOT = $(MAKE) -C arch/$(ARCH)/boot
 
diff --git a/arch/mips64/arc/.cvsignore b/arch/mips64/arc/.cvsignore
new file mode 100644
index 000000000..857dd22e9
--- /dev/null
+++ b/arch/mips64/arc/.cvsignore
@@ -0,0 +1,2 @@
+.depend
+.*.flags
diff --git a/arch/mips64/arc/Makefile b/arch/mips64/arc/Makefile
new file mode 100644
index 000000000..86a5ad8f2
--- /dev/null
+++ b/arch/mips64/arc/Makefile
@@ -0,0 +1,23 @@
+# $Id$
+# Makefile for the SGI arcs prom monitor library routines
+# under Linux.
+#
+# Note! Dependencies are done automagically by 'make dep', which also
+# removes any old dependencies. DON'T put your own dependencies here
+# unless it's something special (ie not a .c file).
+#
+# Note 2! The CFLAGS definitions are now in the main makefile...
+
+OBJS  = console.o init.o printf.o memory.o tree.o env.o \
+      cmdline.o misc.o time.o file.o identify.o
+
+all: arclib.a
+
+arclib.a: $(OBJS)
+	$(AR) rcs arclib.a $(OBJS)
+	sync
+
+dep:
+	$(CPP) -M *.c > .depend
+
+include $(TOPDIR)/Rules.make
diff --git a/arch/mips64/arc/cmdline.c b/arch/mips64/arc/cmdline.c
new file mode 100644
index 000000000..7e58e8f7e
--- /dev/null
+++ b/arch/mips64/arc/cmdline.c
@@ -0,0 +1,67 @@
+/* $Id$
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * cmdline.c: Kernel command line creation using ARCS argc/argv.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+
+#include <asm/sgialib.h>
+#include <asm/bootinfo.h>
+
+/* #define DEBUG_CMDLINE */
+
+char arcs_cmdline[CL_SIZE];
+
+char * __init prom_getcmdline(void)
+{
+	return &(arcs_cmdline[0]);
+}
+
+static char *ignored[] = {
+	"ConsoleIn=",
+	"ConsoleOut=",
+	"SystemPartition=",
+	"OSLoader=",
+	"OSLoadPartition=",
+	"OSLoadFilename="
+};
+#define NENTS(foo) ((sizeof((foo)) / (sizeof((foo[0])))))
+
+void __init prom_init_cmdline(void)
+{
+	char *cp;
+	int actr, i;
+
+	actr = 1; /* Always ignore argv[0] */
+
+	cp = &(arcs_cmdline[0]);
+	while(actr < prom_argc) {
+		for(i = 0; i < NENTS(ignored); i++) {
+			int len = strlen(ignored[i]);
+
+			if(!strncmp(prom_argv[actr], ignored[i], len))
+				goto pic_cont;
+		}
+		/* Ok, we want it. */
+		strcpy(cp, prom_argv[actr]);
+		cp += strlen(prom_argv[actr]);
+		*cp++ = ' ';
+
+	pic_cont:
+		actr++;
+	}
+	if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
+		--cp;
+	*cp = '\0';
+
+#ifdef DEBUG_CMDLINE
+	prom_printf("prom_init_cmdline: %s\n", &(arcs_cmdline[0]));
+#endif
+}
diff --git a/arch/mips64/arc/console.c b/arch/mips64/arc/console.c
new file mode 100644
index 000000000..f16d2a766
--- /dev/null
+++ b/arch/mips64/arc/console.c
@@ -0,0 +1,29 @@
+/* $Id$
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * console.c: SGI arcs console code.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@sgi.com)
+ */
+#include <linux/init.h>
+#include <asm/sgialib.h>
+
+void __init prom_putchar(char c)
+{
+	long cnt;
+	char it = c;
+
+	romvec->write(1, &it, 1, &cnt);
+}
+
+char __init prom_getchar(void)
+{
+	long cnt;
+	char c;
+
+	romvec->read(0, &c, 1, &cnt);
+	return c;
+}
diff --git a/arch/mips64/arc/env.c b/arch/mips64/arc/env.c
new file mode 100644
index 000000000..55a250047
--- /dev/null
+++ b/arch/mips64/arc/env.c
@@ -0,0 +1,25 @@
+/* $Id$
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * env.c: ARCS environment variable routines.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+
+#include <asm/sgialib.h>
+
+char * __init prom_getenv(char *name)
+{
+	return romvec->get_evar(name);
+}
+
+long __init prom_setenv(char *name, char *value)
+{
+	return romvec->set_evar(name, value);
+}
diff --git a/arch/mips64/arc/file.c b/arch/mips64/arc/file.c
new file mode 100644
index 000000000..f609e7846
--- /dev/null
+++ b/arch/mips64/arc/file.c
@@ -0,0 +1,68 @@
+/* $Id$
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * ARC firmware interface.
+ *
+ * Copyright (C) 1994, 1995, 1996, 1999 Ralf Baechle
+ * Copyright (C) 1999 Silicon Graphics, Inc.
+ */
+#include <linux/init.h>
+#include <asm/sgialib.h>
+
+long __init prom_getvdirent(unsigned long fd, struct linux_vdirent *ent,
+                            unsigned long num, unsigned long *cnt)
+{
+	return ARC_CALL4(get_vdirent, fd, ent, num, cnt);
+}
+
+long __init prom_open(char *name, enum linux_omode md, unsigned long *fd)
+{
+	return ARC_CALL3(open, name, md, fd);
+}
+
+long __init prom_close(unsigned long fd)
+{
+	return ARC_CALL1(close, fd);
+}
+
+long __init prom_read(unsigned long fd, void *buf, unsigned long num,
+                      unsigned long *cnt)
+{
+	return ARC_CALL4(read, fd, buf, num, cnt);
+}
+
+long __init prom_getrstatus(unsigned long fd)
+{
+	return ARC_CALL1(get_rstatus, fd);
+}
+
+long __init prom_write(unsigned long fd, void *buf, unsigned long num,
+                       unsigned long *cnt)
+{
+	return ARC_CALL4(write, fd, buf, num, cnt);
+}
+
+long __init prom_seek(unsigned long fd, struct linux_bigint *off,
+                      enum linux_seekmode sm)
+{
+	return ARC_CALL3(seek, fd, off, sm);
+}
+
+long __init prom_mount(char *name, enum linux_mountops op)
+{
+	return ARC_CALL2(mount, name, op);
+}
+
+long __init prom_getfinfo(unsigned long fd, struct linux_finfo *buf)
+{
+	return ARC_CALL2(get_finfo, fd, buf);
+}
+
+long __init prom_setfinfo(unsigned long fd, unsigned long flags,
+                          unsigned long msk)
+{
+	return ARC_CALL3(set_finfo, fd, flags, msk);
+}
diff --git a/arch/mips64/arc/identify.c b/arch/mips64/arc/identify.c
new file mode 100644
index 000000000..c2a6809be
--- /dev/null
+++ b/arch/mips64/arc/identify.c
@@ -0,0 +1,71 @@
+/* $Id$
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * identify.c: identify machine by looking up system identifier
+ *
+ * Copyright (C) 1998 Thomas Bogendoerfer
+ * 
+ * This code is based on arch/mips/sgi/kernel/system.c, which is
+ * 
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/string.h>
+
+#include <asm/sgi/sgi.h>
+#include <asm/sgialib.h>
+#include <asm/bootinfo.h>
+
+struct smatch {
+    char *name;
+    int group;
+    int type;
+    int flags;
+};
+
+static struct smatch mach_table[] = {
+    { "SGI-IP22", MACH_GROUP_SGI, MACH_SGI_INDY, PROM_FLAG_ARCS },
+    { "Microsoft-Jazz", MACH_GROUP_JAZZ, MACH_MIPS_MAGNUM_4000, 0 },
+    { "PICA-61", MACH_GROUP_JAZZ, MACH_ACER_PICA_61, 0 },
+    { "RM200PCI", MACH_GROUP_SNI_RM, MACH_SNI_RM200_PCI, 0 }
+};
+
+int prom_flags;
+
+static struct smatch * __init string_to_mach(char *s)
+{
+    int i;
+    
+    for (i = 0; i < sizeof (mach_table); i++) {
+	if(!strcmp(s, mach_table[i].name))
+	    return &mach_table[i];
+    }
+    prom_printf("\nYeee, could not determine architecture type <%s>\n", s);
+    prom_printf("press a key to reboot\n");
+    prom_getchar();
+    romvec->imode();
+    return NULL;
+}
+
+void __init prom_identify_arch(void)
+{
+    pcomponent *p;
+    struct smatch *mach;
+    
+    /* The root component tells us what machine architecture we
+     * have here.
+     */
+    p = prom_getchild(PROM_NULL_COMPONENT);
+    printk("ARCH: %s\n", p->iname);
+    mach = string_to_mach(p->iname);
+
+    mips_machgroup = mach->group;
+    mips_machtype = mach->type;
+    prom_flags = mach->flags;
+}
+
diff --git a/arch/mips64/arc/init.c b/arch/mips64/arc/init.c
new file mode 100644
index 000000000..a94f7da27
--- /dev/null
+++ b/arch/mips64/arc/init.c
@@ -0,0 +1,61 @@
+/* $Id$
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * PROM library initialisation code.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/config.h>
+
+#include <asm/sgialib.h>
+
+#undef DEBUG_PROM_INIT
+
+/* Master romvec interface. */
+struct linux_romvec *romvec;
+struct linux_promblock *sgi_pblock;
+int prom_argc;
+char **prom_argv, **prom_envp;
+unsigned short prom_vers, prom_rev;
+
+extern void prom_testtree(void);
+
+int __init prom_init(int argc, char **argv, char **envp)
+{
+	struct linux_promblock *pb;
+
+	romvec = ROMVECTOR;
+	pb = sgi_pblock = PROMBLOCK;
+	prom_argc = argc;
+	prom_argv = argv;
+	prom_envp = envp;
+
+	if(pb->magic != 0x53435241) {
+		prom_printf("Aieee, bad prom vector magic %08lx\n", pb->magic);
+		while(1)
+			;
+	}
+
+	prom_init_cmdline();
+
+	prom_vers = pb->ver;
+	prom_rev = pb->rev;
+	prom_identify_arch();
+	printk("PROMLIB: ARC firmware Version %d Revision %d\n",
+		    prom_vers, prom_rev);
+	prom_meminit();
+
+#ifdef DEBUG_PROM_INIT
+	{
+		prom_printf("Press a key to reboot\n");
+		(void) prom_getchar();
+		romvec->imode();
+	}
+#endif
+	return 0;
+}
diff --git a/arch/mips64/arc/memory.c b/arch/mips64/arc/memory.c
new file mode 100644
index 000000000..7212b9e05
--- /dev/null
+++ b/arch/mips64/arc/memory.c
@@ -0,0 +1,212 @@
+/* $Id$
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * memory.c: PROM library functions for acquiring/using memory descriptors
+ *           given to us from the ARCS firmware.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/swap.h>
+#include <linux/config.h>
+
+#include <asm/sgialib.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/bootinfo.h>
+
+#undef DEBUG
+
+struct linux_mdesc * __init prom_getmdesc(struct linux_mdesc *curr)
+{
+	return romvec->get_mdesc(curr);
+}
+
+#ifdef DEBUG
+static char *arcs_mtypes[8] = {	/* convenient for debugging */
+	"Exception Block",
+	"ARCS Romvec Page",
+	"Free/Contig RAM",
+	"Generic Free RAM",
+	"Bad Memory",
+	"Standlong Program Pages",
+	"ARCS Temp Storage Area",
+	"ARCS Permanent Storage Area"
+};
+
+static char *arc_mtypes[8] = {
+	"Exception Block",
+	"SystemParameterBlock",
+	"FreeMemory",
+	"Bad Memory",
+	"LoadedProgram",
+	"FirmwareTemporary",
+	"FirmwarePermanent",
+	"FreeContigiuous"
+};
+#define mtypes(a) (prom_flags & PROM_FLAG_ARCS) ? arcs_mtypes[a.arcs] : arc_mtypes[a.arc]
+#endif
+
+static struct prom_pmemblock prom_pblocks[PROM_MAX_PMEMBLOCKS];
+
+struct prom_pmemblock * __init prom_getpblock_array(void)
+{
+	return &prom_pblocks[0];
+}
+
+#define MEMTYPE_DONTUSE   0
+#define MEMTYPE_PROM      1
+#define MEMTYPE_FREE      2
+
+static int __init prom_memtype_classify (union linux_memtypes type)
+{
+    if (prom_flags & PROM_FLAG_ARCS) {
+	switch (type.arcs) {
+	 case arcs_free:
+	 case arcs_fcontig:
+	    return MEMTYPE_FREE;
+	 case arcs_atmp:
+	 case arcs_aperm:
+	    return MEMTYPE_PROM;
+	 default:
+	    return MEMTYPE_DONTUSE;
+	}
+    } else {
+	switch (type.arc) {
+	 case arc_free:
+	 case arc_fcontig:
+	    return MEMTYPE_FREE;
+	 case arc_rvpage:
+	 case arc_atmp:
+	 case arc_aperm:
+	    return MEMTYPE_PROM;
+	 default:
+	    return MEMTYPE_DONTUSE;
+	}
+    }
+}
+
+static void __init prom_setup_memupper(void)
+{
+	struct prom_pmemblock *p, *highest;
+
+	for(p = prom_getpblock_array(), highest = 0; p->size != 0; p++) {
+		if(p->base == 0xdeadbeef)
+			prom_printf("WHEEE, bogus pmemblock\n");
+		if(!highest || p->base > highest->base)
+			highest = p;
+	}
+	mips_memory_upper = highest->base + highest->size;
+#ifdef DEBUG
+	prom_printf("prom_setup_memupper: mips_memory_upper = %08lx\n",
+		    mips_memory_upper);
+#endif
+}
+
+void __init prom_meminit(void)
+{
+	struct linux_mdesc *p;
+	int totram;
+	int i = 0;
+
+	p = prom_getmdesc(PROM_NULL_MDESC);
+#ifdef DEBUG
+	prom_printf("ARCS MEMORY DESCRIPTOR dump:\n");
+	while(p) {
+		prom_printf("[%d,%p]: base<%08lx> pages<%08lx> type<%s>\n",
+			    i, p, p->base, p->pages, mtypes(p->type));
+		p = prom_getmdesc(p);
+		i++;
+	}
+#endif
+	p = prom_getmdesc(PROM_NULL_MDESC);
+	totram = 0;
+	i = 0;
+	while(p) {
+	    prom_pblocks[i].type = prom_memtype_classify (p->type);
+	    prom_pblocks[i].base = ((p->base<<PAGE_SHIFT) + 0x80000000);
+	    prom_pblocks[i].size = p->pages << PAGE_SHIFT;
+	    switch (prom_pblocks[i].type) {
+	     case MEMTYPE_FREE:
+		totram += prom_pblocks[i].size;
+#ifdef DEBUG
+		prom_printf("free_chunk[%d]: base=%08lx size=%d\n",
+			    i, prom_pblocks[i].base,
+			    prom_pblocks[i].size);
+#endif
+		i++;
+		break;
+	     case MEMTYPE_PROM:
+#ifdef DEBUG
+		prom_printf("prom_chunk[%d]: base=%08lx size=%d\n",
+			    i, prom_pblocks[i].base,
+			    prom_pblocks[i].size);
+#endif
+		i++;
+		break;
+	     default:
+		break;
+	    }
+	    p = prom_getmdesc(p);
+	}
+	prom_pblocks[i].base = 0xdeadbeef;
+	prom_pblocks[i].size = 0; /* indicates last elem. of array */
+	printk("PROMLIB: Total free ram %d bytes (%dK,%dMB)\n",
+		    totram, (totram/1024), (totram/1024/1024));
+
+	/* Setup upper physical memory bound. */
+	prom_setup_memupper();
+}
+
+/* Called from mem_init() to fixup the mem_map page settings. */
+void __init prom_fixup_mem_map(unsigned long start, unsigned long end)
+{
+	struct prom_pmemblock *p;
+	int i, nents;
+
+	/* Determine number of pblockarray entries. */
+	p = prom_getpblock_array();
+	for(i = 0; p[i].size; i++)
+		;
+	nents = i;
+restart:
+	while(start < end) {
+		for(i = 0; i < nents; i++) {
+			if((p[i].type == MEMTYPE_FREE) &&
+			   (start >= (p[i].base)) &&
+			   (start < (p[i].base + p[i].size))) {
+				start = p[i].base + p[i].size;
+				start &= PAGE_MASK;
+				goto restart;
+			}
+		}
+		set_bit(PG_reserved, &mem_map[MAP_NR(start)].flags);
+		start += PAGE_SIZE;
+	}
+}
+
+void prom_free_prom_memory (void)
+{
+    struct prom_pmemblock *p;
+    unsigned long addr;
+    unsigned long num_pages = 0;
+
+    for(p = prom_getpblock_array(); p->size != 0; p++) {
+	if (p->type == MEMTYPE_PROM) {
+	    for (addr = p->base; addr < p->base + p->size; addr += PAGE_SIZE) {
+		mem_map[MAP_NR(addr)].flags &= ~(1 << PG_reserved);
+		atomic_set(&mem_map[MAP_NR(addr)].count, 1);
+		free_page(addr);
+		num_pages++;
+	    }
+	}
+    }
+    printk ("Freeing prom memory: %ldk freed\n", num_pages * PAGE_SIZE);
+}
diff --git a/arch/mips64/arc/misc.c b/arch/mips64/arc/misc.c
new file mode 100644
index 000000000..56945035e
--- /dev/null
+++ b/arch/mips64/arc/misc.c
@@ -0,0 +1,93 @@
+/* $Id$
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Miscellaneous ARCS PROM routines.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+
+#include <asm/bcache.h>
+#include <asm/sgialib.h>
+#include <asm/bootinfo.h>
+#include <asm/system.h>
+
+extern unsigned long mips_cputype;
+extern void *sgiwd93_host;
+extern void reset_wd33c93(void *instance);
+
+void prom_halt(void)
+{
+	bcops->bc_disable();
+	cli();
+#if CONFIG_SCSI_SGIWD93
+	reset_wd33c93(sgiwd93_host);
+#endif
+	ARC_CALL0(halt);
+never:	goto never;
+}
+
+void prom_powerdown(void)
+{
+	bcops->bc_disable();
+	cli();
+#if CONFIG_SCSI_SGIWD93
+	reset_wd33c93(sgiwd93_host);
+#endif
+	ARC_CALL0(pdown);
+never:	goto never;
+}
+
+/* XXX is this a soft reset basically? XXX */
+void prom_restart(void)
+{
+	bcops->bc_disable();
+	cli();
+#if CONFIG_SCSI_SGIWD93
+	reset_wd33c93(sgiwd93_host);
+#endif
+	ARC_CALL0(restart);
+never:	goto never;
+}
+
+void prom_reboot(void)
+{
+	bcops->bc_disable();
+	cli();
+#if CONFIG_SCSI_SGIWD93
+	reset_wd33c93(sgiwd93_host);
+#endif
+	ARC_CALL0(reboot);
+never:	goto never;
+}
+
+void prom_imode(void)
+{
+	bcops->bc_disable();
+	cli();
+#if CONFIG_SCSI_SGIWD93
+	reset_wd33c93(sgiwd93_host);
+#endif
+	ARC_CALL0(imode);
+never:	goto never;
+}
+
+long prom_cfgsave(void)
+{
+	return ARC_CALL0(cfg_save);
+}
+
+struct linux_sysid *prom_getsysid(void)
+{
+	return (struct linux_sysid *) ARC_CALL0(get_sysid);
+}
+
+void __init prom_cacheflush(void)
+{
+	ARC_CALL0(cache_flush);
+}
diff --git a/arch/mips64/arc/printf.c b/arch/mips64/arc/printf.c
new file mode 100644
index 000000000..ccefab0c7
--- /dev/null
+++ b/arch/mips64/arc/printf.c
@@ -0,0 +1,37 @@
+/* $Id$
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Putting things on the screen using SGI arcs PROM facilities.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@sgi.com)
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+
+#include <asm/sgialib.h>
+
+static char ppbuf[1024];
+
+void __init prom_printf(char *fmt, ...)
+{
+	va_list args;
+	char ch, *bptr;
+	int i;
+
+	va_start(args, fmt);
+	i = vsprintf(ppbuf, fmt, args);
+
+	bptr = ppbuf;
+
+	while((ch = *(bptr++)) != 0) {
+		if(ch == '\n')
+			prom_putchar('\r');
+
+		prom_putchar(ch);
+	}
+	va_end(args);
+	return;
+}
diff --git a/arch/mips64/arc/salone.c b/arch/mips64/arc/salone.c
new file mode 100644
index 000000000..0635c24a0
--- /dev/null
+++ b/arch/mips64/arc/salone.c
@@ -0,0 +1,26 @@
+/* $Id$
+ *
+ * Routines to load into memory and execute stand-along program images using
+ * ARCS PROM firmware.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ */
+#include <linux/init.h>
+#include <asm/sgialib.h>
+
+long __init prom_load(char *name, unsigned long end, unsigned long *pc,
+                      unsigned long *eaddr)
+{
+	return romvec->load(name, end, pc, eaddr);
+}
+
+long __init prom_invoke(unsigned long pc, unsigned long sp, long argc,
+                        char **argv, char **envp))
+{
+	return romvec->invoke(pc, sp, argc, argv, envp);
+}
+
+long __init prom_exec(char *name, long argc, char **argv, char **envp)
+{
+	return romvec->exec(name, argc, argv, envp);
+}
diff --git a/arch/mips64/arc/time.c b/arch/mips64/arc/time.c
new file mode 100644
index 000000000..378db5331
--- /dev/null
+++ b/arch/mips64/arc/time.c
@@ -0,0 +1,22 @@
+/* $Id$
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Extracting time information from ARCS prom.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ */
+#include <linux/init.h>
+#include <asm/sgialib.h>
+
+struct __init linux_tinfo *prom_gettinfo(void)
+{
+	return romvec->get_tinfo();
+}
+
+unsigned __init long prom_getrtime(void)
+{
+	return romvec->get_rtime();
+}
diff --git a/arch/mips64/arc/tree.c b/arch/mips64/arc/tree.c
new file mode 100644
index 000000000..12a88230b
--- /dev/null
+++ b/arch/mips64/arc/tree.c
@@ -0,0 +1,113 @@
+/* $Id$
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * PROM component device tree code.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ */
+#include <linux/init.h>
+#include <asm/sgialib.h>
+
+#define DEBUG_PROM_TREE
+
+pcomponent * __init prom_getsibling(pcomponent *this)
+{
+	if(this == PROM_NULL_COMPONENT)
+		return PROM_NULL_COMPONENT;
+	return romvec->next_component(this);
+}
+
+pcomponent * __init prom_getchild(pcomponent *this)
+{
+	return romvec->child_component(this);
+}
+
+pcomponent * __init prom_getparent(pcomponent *child)
+{
+	if(child == PROM_NULL_COMPONENT)
+		return PROM_NULL_COMPONENT;
+	return romvec->parent_component(child);
+}
+
+long __init prom_getcdata(void *buffer, pcomponent *this)
+{
+	return romvec->component_data(buffer, this);
+}
+
+pcomponent * __init prom_childadd(pcomponent *this, pcomponent *tmp,
+                                  void *data)
+{
+	return romvec->child_add(this, tmp, data);
+}
+
+long __init prom_delcomponent(pcomponent *this)
+{
+	return romvec->comp_del(this);
+}
+
+pcomponent * __init prom_componentbypath(char *path)
+{
+	return romvec->component_by_path(path);
+}
+
+#ifdef DEBUG_PROM_TREE
+static char *classes[] = {
+	"system", "processor", "cache", "adapter", "controller", "peripheral",
+	"memory"
+};
+
+static char *types[] = {
+	"arc", "cpu", "fpu", "picache", "pdcache", "sicache", "sdcache", "sccache",
+	"memdev", "eisa adapter", "tc adapter", "scsi adapter", "dti adapter",
+	"multi-func adapter", "disk controller", "tp controller",
+	"cdrom controller", "worm controller", "serial controller",
+	"net controller", "display controller", "parallel controller",
+	"pointer controller", "keyboard controller", "audio controller",
+	"misc controller", "disk peripheral", "floppy peripheral",
+	"tp peripheral", "modem peripheral", "monitor peripheral",
+	"printer peripheral", "pointer peripheral", "keyboard peripheral",
+	"terminal peripheral", "line peripheral", "net peripheral",
+	"misc peripheral", "anonymous"
+};
+
+static char *iflags[] = {
+	"bogus", "read only", "removable", "console in", "console out",
+	"input", "output"
+};
+
+static void __init dump_component(pcomponent *p)
+{
+	prom_printf("[%p]:class<%s>type<%s>flags<%s>ver<%d>rev<%d>",
+		    p, classes[p->class], types[p->type],
+		    iflags[p->iflags], p->vers, p->rev);
+	prom_printf("key<%08lx>\n\tamask<%08lx>cdsize<%d>ilen<%d>iname<%s>\n",
+		    p->key, p->amask, (int)p->cdsize, (int)p->ilen, p->iname);
+}
+
+static void __init traverse(pcomponent *p, int op)
+{
+	dump_component(p);
+	if(prom_getchild(p))
+		traverse(prom_getchild(p), 1);
+	if(prom_getsibling(p) && op)
+		traverse(prom_getsibling(p), 1);
+}
+
+void __init prom_testtree(void)
+{
+	pcomponent *p;
+
+	p = prom_getchild(PROM_NULL_COMPONENT);
+	dump_component(p);
+	p = prom_getchild(p);
+	while(p) {
+		dump_component(p);
+		p = prom_getsibling(p);
+	}
+	prom_printf("press a key\n");
+	prom_getchar();
+}
+#endif
diff --git a/arch/mips64/config.in b/arch/mips64/config.in
index ed3798b04..d6e52deca 100644
--- a/arch/mips64/config.in
+++ b/arch/mips64/config.in
@@ -1,4 +1,4 @@
-# $Id$
+# $Id: config.in,v 1.1 1999/08/18 23:37:46 ralf Exp $
 #
 # For a description of the syntax of this configuration file,
 # see the Configure script.
@@ -12,18 +12,27 @@ endmenu
 
 mainmenu_option next_comment
 comment 'Machine selection'
-bool 'Support for SGI workstations' CONFIG_SGI
+bool 'Support for SGI IP22' CONFIG_SGI_IP22
 endmenu
 
+#
+# Select some configuration options automatically for certain systems
+#
+unset CONFIG_BOOT_ELF32
+
+if [ "$CONFIG_SGI_IP22" = "y" ]; then
+  define_bool CONFIG_BOOT_ELF32 y
+fi
+
 mainmenu_option next_comment
 comment 'CPU selection'
 
-choice 'CPU type' \
-	" R4300 CONFIG_CPU_R4300	\
-	 R4x00 CONFIG_CPU_R4X00	\
-	 R5000 CONFIG_CPU_R5000	\
-	 R56x0 CONFIG_CPU_NEVADA \
-	 R8000 CONFIG_CPU_R8000	\
+choice 'CPU type'				\
+	"R4300 CONFIG_CPU_R4300			\
+	 R4x00 CONFIG_CPU_R4X00			\
+	 R5000 CONFIG_CPU_R5000			\
+	 R56x0 CONFIG_CPU_NEVADA		\
+	 R8000 CONFIG_CPU_R8000			\
 	 R10000 CONFIG_CPU_R10000" R4x00
 endmenu
 
@@ -32,13 +41,6 @@ comment 'General setup'
 
 bool 'Generate little endian code' CONFIG_CPU_LITTLE_ENDIAN
 
-#
-# XXX Binary compatibility stuff.  Not for now ...
-#
-#if [ "$CONFIG_CPU_LITTLE_ENDIAN" = "n" ]; then
-#  define_bool CONFIG_BINFMT_IRIX y
-#  define_bool CONFIG_FORWARD_KEYBOARD y
-#fi
 define_bool CONFIG_BINFMT_AOUT n
 define_bool CONFIG_BINFMT_ELF y
 tristate 'Kernel support for MISC binaries' CONFIG_BINFMT_MISC
@@ -123,7 +125,7 @@ if [ "$CONFIG_VT" = "y" ]; then
   mainmenu_option next_comment
   comment 'Console drivers'
   # XXX cleanup
-  if [ "$CONFIG_SGI" = "y" ]; then
+  if [ "$CONFIG_SGI_IP22" = "y" ]; then
     tristate 'SGI Newport Console support' CONFIG_SGI_NEWPORT_CONSOLE
     if [ "$CONFIG_SGI_NEWPORT_CONSOLE" != "y" ]; then
       define_bool CONFIG_DUMMY_CONSOLE y
@@ -141,7 +143,7 @@ source drivers/sound/Config.in
 fi
 endmenu
 
-if [ "$CONFIG_SGI" = "y" ]; then
+if [ "$CONFIG_SGI_IP22" = "y" ]; then
   source drivers/sgi/Config.in
 fi
 
diff --git a/arch/mips64/defconfig b/arch/mips64/defconfig
index 9b97a19f8..ab202c680 100644
--- a/arch/mips64/defconfig
+++ b/arch/mips64/defconfig
@@ -10,7 +10,7 @@
 #
 # Machine selection
 #
-CONFIG_SGI=y
+CONFIG_SGI_IP22=y
 
 #
 # CPU selection
diff --git a/arch/mips64/kernel/mips64_ksyms.c b/arch/mips64/kernel/mips64_ksyms.c
new file mode 100644
index 000000000..c76978a32
--- /dev/null
+++ b/arch/mips64/kernel/mips64_ksyms.c
@@ -0,0 +1,125 @@
+/* $Id$
+ *
+ * Export MIPS64-specific functions needed for loadable modules.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1996, 1997, 1998, 1999 by Ralf Baechle
+ * Copyright (C) 1999 Silicon Graphics, Inc.
+ */
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <asm/irq.h>
+#include <linux/in6.h>
+#include <linux/pci.h>
+
+#include <asm/checksum.h>
+#include <asm/dma.h>
+#include <asm/floppy.h>
+#include <asm/io.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/sgihpc.h>
+#include <asm/softirq.h>
+#include <asm/uaccess.h>
+
+extern void *__bzero(void *__s, size_t __count);
+extern long __strncpy_from_user_nocheck_asm(char *__to,
+                                            const char *__from, long __len);
+extern long __strncpy_from_user_asm(char *__to, const char *__from,
+                                    long __len);
+extern long __strlen_user_nocheck_asm(const char *s);
+extern long __strlen_user_asm(const char *s);
+
+EXPORT_SYMBOL(EISA_bus);
+
+/*
+ * String functions
+ */
+EXPORT_SYMBOL_NOVERS(memcmp);
+EXPORT_SYMBOL_NOVERS(memset);
+EXPORT_SYMBOL_NOVERS(memcpy);
+EXPORT_SYMBOL_NOVERS(memmove);
+EXPORT_SYMBOL_NOVERS(strcat);
+EXPORT_SYMBOL_NOVERS(strchr);
+EXPORT_SYMBOL_NOVERS(strlen);
+EXPORT_SYMBOL_NOVERS(strncat);
+EXPORT_SYMBOL_NOVERS(strnlen);
+EXPORT_SYMBOL_NOVERS(strrchr);
+EXPORT_SYMBOL_NOVERS(strtok);
+EXPORT_SYMBOL_NOVERS(strpbrk);
+
+EXPORT_SYMBOL(clear_page);
+EXPORT_SYMBOL(__mips_bh_counter);
+EXPORT_SYMBOL(local_bh_count);
+EXPORT_SYMBOL(local_irq_count);
+EXPORT_SYMBOL(enable_irq);
+EXPORT_SYMBOL(disable_irq);
+EXPORT_SYMBOL(kernel_thread);
+
+/*
+ * Userspace access stuff.
+ */
+EXPORT_SYMBOL_NOVERS(__copy_user);
+EXPORT_SYMBOL_NOVERS(__bzero);
+EXPORT_SYMBOL_NOVERS(__strncpy_from_user_nocheck_asm);
+EXPORT_SYMBOL_NOVERS(__strncpy_from_user_asm);
+EXPORT_SYMBOL_NOVERS(__strlen_user_nocheck_asm);
+EXPORT_SYMBOL_NOVERS(__strlen_user_asm);
+
+
+/* Networking helper routines. */
+EXPORT_SYMBOL(csum_partial_copy);
+
+/*
+ * Functions to control caches.
+ */
+EXPORT_SYMBOL(flush_page_to_ram);
+EXPORT_SYMBOL(flush_cache_all);
+EXPORT_SYMBOL(dma_cache_wback_inv);
+EXPORT_SYMBOL(dma_cache_inv);
+
+EXPORT_SYMBOL(invalid_pte_table);
+
+/*
+ * Base address of ports for Intel style I/O.
+ */
+EXPORT_SYMBOL(mips_io_port_base);
+
+/*
+ * Architecture specific stuff.
+ */
+#ifdef CONFIG_MIPS_JAZZ
+EXPORT_SYMBOL(vdma_alloc);
+EXPORT_SYMBOL(vdma_free);
+EXPORT_SYMBOL(vdma_log2phys);
+#endif
+
+#ifdef CONFIG_SGI_IP22
+EXPORT_SYMBOL(hpc3c0);
+#endif
+
+/*
+ * Kernel hacking ...
+ */
+#include <asm/branch.h>
+#include <linux/sched.h>
+
+int register_fpe(void (*handler)(struct pt_regs *regs, unsigned int fcr31));
+int unregister_fpe(void (*handler)(struct pt_regs *regs, unsigned int fcr31));
+
+#ifdef CONFIG_MIPS_FPE_MODULE
+EXPORT_SYMBOL(__compute_return_epc);
+EXPORT_SYMBOL(register_fpe);
+EXPORT_SYMBOL(unregister_fpe);
+#endif
+
+#ifdef CONFIG_VT
+EXPORT_SYMBOL(screen_info);
+#endif
+
diff --git a/arch/mips64/ld.script.elf32 b/arch/mips64/ld.script.elf32
new file mode 100644
index 000000000..f5878cb35
--- /dev/null
+++ b/arch/mips64/ld.script.elf32
@@ -0,0 +1,114 @@
+OUTPUT_ARCH(mips)
+ENTRY(kernel_entry)
+SECTIONS
+{
+  /* Read-only sections, merged into text segment: */
+  . = 0x80000000;
+  .rel.text      : { *(.rel.text)	}
+  .rela.text     : { *(.rela.text) 	}
+  .rel.data      : { *(.rel.data)	}
+  .rela.data     : { *(.rela.data) 	}
+  .rel.rodata    : { *(.rel.rodata) 	}
+  .rela.rodata   : { *(.rela.rodata) 	}
+  .rel.got       : { *(.rel.got)	}
+  .rela.got      : { *(.rela.got)	}
+  .rel.ctors     : { *(.rel.ctors)	}
+  .rela.ctors    : { *(.rela.ctors)	}
+  .rel.dtors     : { *(.rel.dtors)	}
+  .rela.dtors    : { *(.rela.dtors)	}
+  .rel.init      : { *(.rel.init)	}
+  .rela.init     : { *(.rela.init)	}
+  .rel.fini      : { *(.rel.fini)	}
+  .rela.fini     : { *(.rela.fini)	}
+  .rel.bss       : { *(.rel.bss)	}
+  .rela.bss      : { *(.rela.bss)	}
+  .rel.plt       : { *(.rel.plt)	}
+  .rela.plt      : { *(.rela.plt)	}
+  .init          : { *(.init)		} =0
+  .text      :
+  {
+    _ftext = . ;
+    *(.text)
+    *(.rodata)
+    *(.rodata1)
+    /* .gnu.warning sections are handled specially by elf32.em.  */
+    *(.gnu.warning)
+  } =0
+  _etext = .;
+  PROVIDE (etext = .);
+
+  /* Startup code */
+  . = ALIGN(4096);
+  __init_begin = .;
+  .text.init : { *(.text.init) }
+  .data.init : { *(.data.init) }
+  . = ALIGN(4096);	/* Align double page for init_task_union */
+  __init_end = .;
+
+  .fini      : { *(.fini)    } =0
+  .reginfo : { *(.reginfo) }
+  /* Adjust the address for the data segment.  We want to adjust up to
+     the same address within the page on the next page up.  It would
+     be more correct to do this:
+       . = .;
+     The current expression does not correctly handle the case of a
+     text segment ending precisely at the end of a page; it causes the
+     data segment to skip a page.  The above expression does not have
+     this problem, but it will currently (2/95) cause BFD to allocate
+     a single segment, combining both text and data, for this case.
+     This will prevent the text segment from being shared among
+     multiple executions of the program; I think that is more
+     important than losing a page of the virtual address space (note
+     that no actual memory is lost; the page which is skipped can not
+     be referenced).  */
+  . = .;
+  .data    :
+  {
+    _fdata = . ;
+    *(.data)
+    CONSTRUCTORS
+  }
+  .data1   : { *(.data1) }
+  _gp = . + 0x8000;
+  .lit8 : { *(.lit8) }
+  .lit4 : { *(.lit4) }
+  .ctors         : { *(.ctors)   }
+  .dtors         : { *(.dtors)   }
+  .got           : { *(.got.plt) *(.got) }
+  .dynamic       : { *(.dynamic) }
+  /* We want the small data sections together, so single-instruction offsets
+     can access them all, and initialized data all before uninitialized, so
+     we can shorten the on-disk segment size.  */
+  .sdata     : { *(.sdata) }
+  _edata  =  .;
+  PROVIDE (edata = .);
+
+  __bss_start = .;
+  _fbss = .;
+  .sbss      : { *(.sbss) *(.scommon) }
+  .bss       :
+  {
+   *(.dynbss)
+   *(.bss)
+   *(COMMON)
+  _end = . ;
+  PROVIDE (end = .);
+  }
+  /* These are needed for ELF backends which have not yet been
+     converted to the new style linker.  */
+  .stab 0 : { *(.stab) }
+  .stabstr 0 : { *(.stabstr) }
+  /* DWARF debug sections.
+     Symbols in the .debug DWARF section are relative to the beginning of the
+     section so we begin .debug at 0.  It's not clear yet what needs to happen
+     for the others.   */
+  .debug          0 : { *(.debug) }
+  .debug_srcinfo  0 : { *(.debug_srcinfo) }
+  .debug_aranges  0 : { *(.debug_aranges) }
+  .debug_pubnames 0 : { *(.debug_pubnames) }
+  .debug_sfnames  0 : { *(.debug_sfnames) }
+  .line           0 : { *(.line) }
+  /* These must appear regardless of  .  */
+  .gptab.sdata : { *(.gptab.data) *(.gptab.sdata) }
+  .gptab.sbss : { *(.gptab.bss) *(.gptab.sbss) }
+}
diff --git a/arch/mips64/mm/Makefile b/arch/mips64/mm/Makefile
index a5da59936..dc9459a41 100644
--- a/arch/mips64/mm/Makefile
+++ b/arch/mips64/mm/Makefile
@@ -1,4 +1,4 @@
-# $Id$
+# $Id: Makefile,v 1.1 1999/08/18 23:37:47 ralf Exp $
 #
 # Makefile for the Linux/MIPS-specific parts of the memory manager.
 #
@@ -6,7 +6,7 @@
 O_TARGET := mm.o
 O_OBJS	 := extable.o init.o fault.o r4xx0.o tfp.o andes.o loadmmu.o
 
-ifdef CONFIG_SGI
+ifdef CONFIG_SGI_IP22
 O_OBJS   += umap.o
 endif
 
diff --git a/arch/mips64/mm/init.c b/arch/mips64/mm/init.c
index b94fa636b..903c2541c 100644
--- a/arch/mips64/mm/init.c
+++ b/arch/mips64/mm/init.c
@@ -1,4 +1,4 @@
-/* $Id: init.c,v 1.1 1999/08/18 23:37:47 ralf Exp $
+/* $Id: init.c,v 1.2 1999/08/19 22:56:32 ralf Exp $
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
@@ -31,7 +31,7 @@
 #include <asm/jazzdma.h>
 #include <asm/system.h>
 #include <asm/pgtable.h>
-#ifdef CONFIG_SGI
+#ifdef CONFIG_SGI_IP22
 #include <asm/sgialib.h>
 #endif
 #include <asm/mmu_context.h>
diff --git a/arch/mips64/sgi-ip22/.cvsignore b/arch/mips64/sgi-ip22/.cvsignore
new file mode 100644
index 000000000..857dd22e9
--- /dev/null
+++ b/arch/mips64/sgi-ip22/.cvsignore
@@ -0,0 +1,2 @@
+.depend
+.*.flags
diff --git a/arch/mips64/sgi-ip22/Makefile b/arch/mips64/sgi-ip22/Makefile
new file mode 100644
index 000000000..476432a99
--- /dev/null
+++ b/arch/mips64/sgi-ip22/Makefile
@@ -0,0 +1,24 @@
+# $Id$
+#
+# Makefile for the SGI specific kernel interface routines
+# under Linux.
+#
+
+.S.s:
+	$(CPP) $(CFLAGS) $< -o $*.s
+.S.o:
+	$(CC) $(CFLAGS) -c $< -o $*.o
+
+OBJS  = ip22-mc.o ip22-sc.o ip22-hpc.o ip22-int.o ip22-rtc.o \
+        ip22-setup.o system.o ip22-timer.o ip22-irq.o ip22-reset.o time.o
+
+all: sgikern.a
+
+sgikern.a: $(OBJS)
+	$(AR) rcs sgikern.a $(OBJS)
+	sync
+
+dep:
+	$(CPP) -M *.c > .depend
+
+include $(TOPDIR)/Rules.make
diff --git a/arch/mips64/sgi-ip22/ip22-hpc.c b/arch/mips64/sgi-ip22/ip22-hpc.c
new file mode 100644
index 000000000..c3019e8bf
--- /dev/null
+++ b/arch/mips64/sgi-ip22/ip22-hpc.c
@@ -0,0 +1,102 @@
+/* $Id$
+ *
+ * ip22-hpc.c: Routines for generic manipulation of the HPC controllers.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ * Copyright (C) 1998, 1999 Ralf Baechle
+ */
+#include <linux/init.h>
+
+#include <asm/addrspace.h>
+#include <asm/sgi/sgihpc.h>
+#include <asm/sgi/sgint23.h>
+#include <asm/sgialib.h>
+
+#undef DEBUG_SGIHPC
+
+struct hpc3_regs *hpc3c0, *hpc3c1;
+struct hpc3_miscregs *hpc3mregs;
+
+/* We need software copies of these because they are write only. */
+unsigned long sgi_hpc_write1, sgi_hpc_write2;
+
+/* Machine specific identifier knobs. */
+int sgi_has_ioc2 = 0;
+int sgi_guiness = 0;
+int sgi_boardid;
+
+void __init sgihpc_init(void)
+{
+	unsigned long sid, crev, brev;
+
+	hpc3c0 = (struct hpc3_regs *) (KSEG1 + HPC3_CHIP0_PBASE);
+	hpc3c1 = (struct hpc3_regs *) (KSEG1 + HPC3_CHIP1_PBASE);
+	hpc3mregs = (struct hpc3_miscregs *) (KSEG1 + HPC3_MREGS_PBASE);
+	sid = hpc3mregs->sysid;
+
+	sid &= 0xff;
+	crev = (sid & 0xe0) >> 5;
+	brev = (sid & 0x1e) >> 1;
+
+#ifdef DEBUG_SGIHPC
+	prom_printf("sgihpc_init: crev<%2x> brev<%2x>\n", crev, brev);
+	prom_printf("sgihpc_init: ");
+#endif
+
+	/* This test works now thanks to William J. Earl */
+	if ((sid & 1) == 0 ) {
+#ifdef DEBUG_SGIHPC
+		prom_printf("GUINESS ");
+#endif
+		sgi_guiness = 1;
+	} else {
+#ifdef DEBUG_SGIHPC
+		prom_printf("FULLHOUSE ");
+#endif
+		sgi_guiness = 0;
+	}
+	sgi_boardid = brev;
+
+#ifdef DEBUG_SGIHPC
+	prom_printf("sgi_boardid<%d> ", sgi_boardid);
+#endif
+
+	if(crev == 1) {
+		if((sid & 1) || (brev >= 2)) {
+#ifdef DEBUG_SGIHPC
+			prom_printf("IOC2 ");
+#endif
+			sgi_has_ioc2 = 1;
+		} else {
+#ifdef DEBUG_SGIHPC
+			prom_printf("IOC1 revision 1 ");
+#endif
+		}
+	} else {
+#ifdef DEBUG_SGIHPC
+		prom_printf("IOC1 revision 0 ");
+#endif
+	}
+#ifdef DEBUG_SGIHPC
+	prom_printf("\n");
+#endif
+
+	sgi_hpc_write1 = (HPC3_WRITE1_PRESET |
+		  HPC3_WRITE1_KMRESET |
+		  HPC3_WRITE1_ERESET |
+		  HPC3_WRITE1_LC0OFF);
+
+	sgi_hpc_write2 = (HPC3_WRITE2_EASEL |
+		  HPC3_WRITE2_NTHRESH |
+		  HPC3_WRITE2_TPSPEED |
+		  HPC3_WRITE2_EPSEL |
+		  HPC3_WRITE2_U0AMODE |
+		  HPC3_WRITE2_U1AMODE);
+
+	if(!sgi_guiness)
+		sgi_hpc_write1 |= HPC3_WRITE1_GRESET;
+	hpc3mregs->write1 = sgi_hpc_write1;
+	hpc3mregs->write2 = sgi_hpc_write2;
+
+	hpc3c0->pbus_piocfgs[0][6] |= HPC3_PIOPCFG_HW;
+}
diff --git a/arch/mips64/sgi-ip22/ip22-int.c b/arch/mips64/sgi-ip22/ip22-int.c
new file mode 100644
index 000000000..c6aa35747
--- /dev/null
+++ b/arch/mips64/sgi-ip22/ip22-int.c
@@ -0,0 +1,608 @@
+/* $Id$
+ *
+ * indy_int.c: Routines for generic manipulation of the INT[23] ASIC
+ *             found on INDY workstations..
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ * Copyright (C) 1997, 1998 Ralf Baechle (ralf@gnu.org)
+ * Copyright (C) 1999 Andrew R. Baker (andrewb@uab.edu) - Indigo2 changes
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+
+#include <linux/errno.h>
+#include <linux/kernel_stat.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/timex.h>
+#include <linux/malloc.h>
+#include <linux/random.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+
+#include <asm/bitops.h>
+#include <asm/bootinfo.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/mipsregs.h>
+#include <asm/system.h>
+
+#include <asm/ptrace.h>
+#include <asm/processor.h>
+#include <asm/sgi/sgi.h>
+#include <asm/sgi/sgihpc.h>
+#include <asm/sgi/sgint23.h>
+#include <asm/sgialib.h>
+
+struct sgi_int2_regs *sgi_i2regs;
+struct sgi_int3_regs *sgi_i3regs;
+struct sgi_ioc_ints *ioc_icontrol;
+struct sgi_ioc_timers *ioc_timers;
+volatile unsigned char *ioc_tclear;
+
+static char lc0msk_to_irqnr[256];
+static char lc1msk_to_irqnr[256];
+static char lc2msk_to_irqnr[256];
+static char lc3msk_to_irqnr[256];
+
+extern asmlinkage void indyIRQ(void);
+
+#ifdef CONFIG_REMOTE_DEBUG
+extern void rs_kgdb_hook(int);
+#endif
+
+unsigned int local_bh_count[NR_CPUS];
+unsigned int local_irq_count[NR_CPUS];
+unsigned long spurious_count = 0;
+
+/* Local IRQ's are layed out logically like this:
+ *
+ * 0  --> 7   ==   local 0 interrupts
+ * 8  --> 15  ==   local 1 interrupts
+ * 16 --> 23  ==   vectored level 2 interrupts
+ * 24 --> 31  ==   vectored level 3 interrupts (not used)
+ */
+void disable_local_irq(unsigned int irq_nr)
+{
+	unsigned long flags;
+
+	save_and_cli(flags);
+	switch(irq_nr) {
+	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
+		ioc_icontrol->imask0 &= ~(1 << irq_nr);
+		break;
+
+	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
+		ioc_icontrol->imask1 &= ~(1 << (irq_nr - 8));
+		break;
+
+	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
+		ioc_icontrol->cmeimask0 &= ~(1 << (irq_nr - 16));
+		break;
+
+	default:
+		/* This way we'll see if anyone would ever want vectored
+		 * level 3 interrupts.  Highly unlikely.
+		 */
+		printk("Yeeee, got passed irq_nr %d at disable_irq\n", irq_nr);
+		panic("INVALID IRQ level!");
+	};
+	restore_flags(flags);
+}
+
+void enable_local_irq(unsigned int irq_nr)
+{
+	unsigned long flags;
+	save_and_cli(flags);
+	switch(irq_nr) {
+	case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
+		ioc_icontrol->imask0 |= (1 << irq_nr);
+		break;
+
+	case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15:
+		ioc_icontrol->imask1 |= (1 << (irq_nr - 8));
+		break;
+
+	case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
+		enable_local_irq(7);
+		ioc_icontrol->cmeimask0 |= (1 << (irq_nr - 16));
+		break;
+
+	default:
+		printk("Yeeee, got passed irq_nr %d at disable_irq\n", irq_nr);
+		panic("INVALID IRQ level!");
+	};
+	restore_flags(flags);
+}
+
+void disable_gio_irq(unsigned int irq_nr)
+{
+	/* XXX TODO XXX */
+}
+
+void enable_gio_irq(unsigned int irq_nr)
+{
+	/* XXX TODO XXX */
+}
+
+void disable_hpcdma_irq(unsigned int irq_nr)
+{
+	/* XXX TODO XXX */
+}
+
+void enable_hpcdma_irq(unsigned int irq_nr)
+{
+	/* XXX TODO XXX */
+}
+
+void disable_irq(unsigned int irq_nr)
+{
+	unsigned int n = irq_nr;
+	if(n >= SGINT_END) {
+		printk("whee, invalid irq_nr %d\n", irq_nr);
+		panic("IRQ, you lose...");
+	}
+	if(n >= SGINT_LOCAL0 && n < SGINT_GIO) {
+		disable_local_irq(n - SGINT_LOCAL0);
+	} else if(n >= SGINT_GIO && n < SGINT_HPCDMA) {
+		disable_gio_irq(n - SGINT_GIO);
+	} else if(n >= SGINT_HPCDMA && n < SGINT_END) {
+		disable_hpcdma_irq(n - SGINT_HPCDMA);
+	} else {
+		panic("how did I get here?");
+	}
+}
+
+void enable_irq(unsigned int irq_nr)
+{
+	unsigned int n = irq_nr;
+	if(n >= SGINT_END) {
+		printk("whee, invalid irq_nr %d\n", irq_nr);
+		panic("IRQ, you lose...");
+	}
+	if(n >= SGINT_LOCAL0 && n < SGINT_GIO) {
+		enable_local_irq(n - SGINT_LOCAL0);
+	} else if(n >= SGINT_GIO && n < SGINT_HPCDMA) {
+		enable_gio_irq(n - SGINT_GIO);
+	} else if(n >= SGINT_HPCDMA && n < SGINT_END) {
+		enable_hpcdma_irq(n - SGINT_HPCDMA);
+	} else {
+		panic("how did I get here?");
+	}
+}
+
+#if 0
+/*
+ * Currently unused.
+ */
+static void local_unex(int irq, void *data, struct pt_regs *regs)
+{
+	printk("Whee: unexpected local IRQ at %08lx\n",
+	       (unsigned long) regs->cp0_epc);
+	printk("DUMP: stat0<%x> stat1<%x> vmeistat<%x>\n",
+	       ioc_icontrol->istat0, ioc_icontrol->istat1,
+	       ioc_icontrol->vmeistat);
+}
+#endif
+
+static struct irqaction *local_irq_action[24] = {
+	NULL, NULL, NULL, NULL,
+	NULL, NULL, NULL, NULL,
+	NULL, NULL, NULL, NULL,
+	NULL, NULL, NULL, NULL,
+	NULL, NULL, NULL, NULL,
+	NULL, NULL, NULL, NULL
+};
+
+int setup_indy_irq(int irq, struct irqaction * new)
+{
+	printk("setup_indy_irq: Yeee, don't know how to setup irq<%d> for %s  %p\n",
+	       irq, new->name, new->handler);
+	return 0;
+}
+
+static struct irqaction r4ktimer_action = {
+	NULL, 0, 0, "R4000 timer/counter", NULL, NULL,
+};
+
+static struct irqaction indy_berr_action = {
+	NULL, 0, 0, "IP22 Bus Error", NULL, NULL,
+};
+
+static struct irqaction *irq_action[16] = {
+	NULL, NULL, NULL, NULL,
+	NULL, NULL, &indy_berr_action, &r4ktimer_action,
+	NULL, NULL, NULL, NULL,
+	NULL, NULL, NULL, NULL
+};
+
+int get_irq_list(char *buf)
+{
+	int i, len = 0;
+	int num = 0;
+	struct irqaction * action;
+
+	for (i = 0 ; i < 16 ; i++, num++) {
+		action = irq_action[i];
+		if (!action) 
+			continue;
+		len += sprintf(buf+len, "%2d: %8d %c %s",
+			num, kstat.irqs[0][num],
+			(action->flags & SA_INTERRUPT) ? '+' : ' ',
+			action->name);
+		for (action=action->next; action; action = action->next) {
+			len += sprintf(buf+len, ",%s %s",
+				(action->flags & SA_INTERRUPT) ? " +" : "",
+				action->name);
+		}
+		len += sprintf(buf+len, " [on-chip]\n");
+	}
+	for (i = 0 ; i < 24 ; i++, num++) {
+		action = local_irq_action[i];
+		if (!action) 
+			continue;
+		len += sprintf(buf+len, "%2d: %8d %c %s",
+			num, kstat.irqs[0][num],
+			(action->flags & SA_INTERRUPT) ? '+' : ' ',
+			action->name);
+		for (action=action->next; action; action = action->next) {
+			len += sprintf(buf+len, ",%s %s",
+				(action->flags & SA_INTERRUPT) ? " +" : "",
+				action->name);
+		}
+		len += sprintf(buf+len, " [local]\n");
+	}
+	return len;
+}
+
+atomic_t __mips_bh_counter;
+
+/*
+ * do_IRQ handles IRQ's that have been installed without the
+ * SA_INTERRUPT flag: it uses the full signal-handling return
+ * and runs with other interrupts enabled. All relatively slow
+ * IRQ's should use this format: notably the keyboard/timer
+ * routines.
+ */
+asmlinkage void do_IRQ(int irq, struct pt_regs * regs)
+{
+	struct irqaction *action;
+	int do_random, cpu;
+
+	cpu = smp_processor_id();
+	hardirq_enter(cpu);
+	kstat.irqs[0][irq]++;
+
+	printk("Got irq %d, press a key.", irq);
+	prom_getchar();
+	romvec->imode();
+
+	/*
+	 * mask and ack quickly, we don't want the irq controller
+	 * thinking we're snobs just because some other CPU has
+	 * disabled global interrupts (we have already done the
+	 * INT_ACK cycles, it's too late to try to pretend to the
+	 * controller that we aren't taking the interrupt).
+	 *
+	 * Commented out because we've already done this in the
+	 * machinespecific part of the handler.  It's reasonable to
+	 * do this here in a highlevel language though because that way
+	 * we could get rid of a good part of duplicated code ...
+	 */
+        /* mask_and_ack_irq(irq); */
+
+	action = *(irq + irq_action);
+	if (action) {
+		if (!(action->flags & SA_INTERRUPT))
+			__sti();
+		action = *(irq + irq_action);
+		do_random = 0;
+		do {
+			do_random |= action->flags;
+			action->handler(irq, action->dev_id, regs);
+			action = action->next;
+		} while (action);
+		if (do_random & SA_SAMPLE_RANDOM)
+			add_interrupt_randomness(irq);
+		__cli();
+	}
+	hardirq_exit(cpu);
+
+	/* unmasking and bottom half handling is done magically for us. */
+}
+
+int request_local_irq(unsigned int lirq, void (*func)(int, void *, struct pt_regs *),
+		      unsigned long iflags, const char *dname, void *devid)
+{
+	struct irqaction *action;
+
+	lirq -= SGINT_LOCAL0;
+	if(lirq >= 24 || !func)
+		return -EINVAL;
+
+	action = (struct irqaction *)kmalloc(sizeof(struct irqaction), GFP_KERNEL);
+	if(!action)
+		return -ENOMEM;
+
+	action->handler = func;
+	action->flags = iflags;
+	action->mask = 0;
+	action->name = dname;
+	action->dev_id = devid;
+	action->next = 0;
+	local_irq_action[lirq] = action;
+	enable_irq(lirq + SGINT_LOCAL0);
+	return 0;
+}
+
+void free_local_irq(unsigned int lirq, void *dev_id)
+{
+	struct irqaction *action;
+
+	lirq -= SGINT_LOCAL0;
+	if(lirq >= 24) {
+		printk("Aieee: trying to free bogus local irq %d\n",
+		       lirq + SGINT_LOCAL0);
+		return;
+	}
+	action = local_irq_action[lirq];
+	local_irq_action[lirq] = NULL;
+	disable_irq(lirq + SGINT_LOCAL0);
+	kfree(action);
+}
+
+int request_irq(unsigned int irq, 
+		void (*handler)(int, void *, struct pt_regs *),
+		unsigned long irqflags, 
+		const char * devname,
+		void *dev_id)
+{
+	int retval;
+	struct irqaction * action;
+
+	if (irq >= SGINT_END)
+		return -EINVAL;
+	if (!handler)
+		return -EINVAL;
+
+	if((irq >= SGINT_LOCAL0) && (irq < SGINT_GIO))
+		return request_local_irq(irq, handler, irqflags, devname, dev_id);
+
+	action = (struct irqaction *)kmalloc(sizeof(struct irqaction), GFP_KERNEL);
+	if (!action)
+		return -ENOMEM;
+
+	action->handler = handler;
+	action->flags = irqflags;
+	action->mask = 0;
+	action->name = devname;
+	action->next = NULL;
+	action->dev_id = dev_id;
+
+	retval = setup_indy_irq(irq, action);
+
+	if (retval)
+		kfree(action);
+	return retval;
+}
+		
+void free_irq(unsigned int irq, void *dev_id)
+{
+	struct irqaction * action, **p;
+	unsigned long flags;
+
+	if (irq >= SGINT_END) {
+		printk("Trying to free IRQ%d\n",irq);
+		return;
+	}
+	if((irq >= SGINT_LOCAL0) && (irq < SGINT_GIO)) {
+		free_local_irq(irq, dev_id);
+		return;
+	}
+	for (p = irq + irq_action; (action = *p) != NULL; p = &action->next) {
+		if (action->dev_id != dev_id)
+			continue;
+
+		/* Found it - now free it */
+		save_and_cli(flags);
+		*p = action->next;
+		restore_flags(flags);
+		kfree(action);
+		return;
+	}
+	printk("Trying to free free IRQ%d\n",irq);
+}
+
+int (*irq_cannonicalize)(int irq);
+
+static int indy_irq_cannonicalize(int irq)
+{
+	return irq;	/* Sane hardware, sane code ... */
+}
+
+void __init init_IRQ(void)
+{
+	irq_cannonicalize = indy_irq_cannonicalize;
+	irq_setup();
+}
+
+void indy_local0_irqdispatch(struct pt_regs *regs)
+{
+	struct irqaction *action;
+	unsigned char mask = ioc_icontrol->istat0;
+	unsigned char mask2 = 0;
+	int irq, cpu = smp_processor_id();;
+
+	mask &= ioc_icontrol->imask0;
+	if(mask & ISTAT0_LIO2) {
+		mask2 = ioc_icontrol->vmeistat;
+		mask2 &= ioc_icontrol->cmeimask0;
+		irq = lc2msk_to_irqnr[mask2];
+		action = local_irq_action[irq];
+	} else {
+		irq = lc0msk_to_irqnr[mask];
+		action = local_irq_action[irq];
+	}
+
+	hardirq_enter(cpu);
+	kstat.irqs[0][irq + 16]++;
+	action->handler(irq, action->dev_id, regs);
+	hardirq_exit(cpu);
+}
+
+void indy_local1_irqdispatch(struct pt_regs *regs)
+{
+	struct irqaction *action;
+	unsigned char mask = ioc_icontrol->istat1;
+	unsigned char mask2 = 0;
+	int irq, cpu = smp_processor_id();;
+
+	mask &= ioc_icontrol->imask1;
+	if(mask & ISTAT1_LIO3) {
+		printk("WHee: Got an LIO3 irq, winging it...\n");
+		mask2 = ioc_icontrol->vmeistat;
+		mask2 &= ioc_icontrol->cmeimask1;
+		irq = lc3msk_to_irqnr[ioc_icontrol->vmeistat];
+		action = local_irq_action[irq];
+	} else {
+		irq = lc1msk_to_irqnr[mask];
+		action = local_irq_action[irq];
+	}
+	hardirq_enter(cpu);
+	kstat.irqs[0][irq + 24]++;
+	action->handler(irq, action->dev_id, regs);
+	hardirq_exit(cpu);
+}
+
+void indy_buserror_irq(struct pt_regs *regs)
+{
+	int cpu = smp_processor_id();
+	int irq = 6;
+
+	hardirq_enter(cpu);
+	kstat.irqs[0][irq]++;
+	printk("Got a bus error IRQ, shouldn't happen yet\n");
+	show_regs(regs);
+	printk("Spinning...\n");
+	while(1);
+	hardirq_exit(cpu);
+}
+
+/* Misc. crap just to keep the kernel linking... */
+unsigned long probe_irq_on (void)
+{
+	return 0;
+}
+
+int probe_irq_off (unsigned long irqs)
+{
+	return 0;
+}
+
+void __init sgint_init(void)
+{
+	int i;
+#ifdef CONFIG_REMOTE_DEBUG
+	char *ctype;
+#endif
+
+	sgi_i2regs = (struct sgi_int2_regs *) (KSEG1 + SGI_INT2_BASE);
+	sgi_i3regs = (struct sgi_int3_regs *) (KSEG1 + SGI_INT3_BASE);
+
+	/* Init local mask --> irq tables. */
+	for(i = 0; i < 256; i++) {
+		if(i & 0x80) {
+			lc0msk_to_irqnr[i] = 7;
+			lc1msk_to_irqnr[i] = 15;
+			lc2msk_to_irqnr[i] = 23;
+			lc3msk_to_irqnr[i] = 31;
+		} else if(i & 0x40) {
+			lc0msk_to_irqnr[i] = 6;
+			lc1msk_to_irqnr[i] = 14;
+			lc2msk_to_irqnr[i] = 22;
+			lc3msk_to_irqnr[i] = 30;
+		} else if(i & 0x20) {
+			lc0msk_to_irqnr[i] = 5;
+			lc1msk_to_irqnr[i] = 13;
+			lc2msk_to_irqnr[i] = 21;
+			lc3msk_to_irqnr[i] = 29;
+		} else if(i & 0x10) {
+			lc0msk_to_irqnr[i] = 4;
+			lc1msk_to_irqnr[i] = 12;
+			lc2msk_to_irqnr[i] = 20;
+			lc3msk_to_irqnr[i] = 28;
+		} else if(i & 0x08) {
+			lc0msk_to_irqnr[i] = 3;
+			lc1msk_to_irqnr[i] = 11;
+			lc2msk_to_irqnr[i] = 19;
+			lc3msk_to_irqnr[i] = 27;
+		} else if(i & 0x04) {
+			lc0msk_to_irqnr[i] = 2;
+			lc1msk_to_irqnr[i] = 10;
+			lc2msk_to_irqnr[i] = 18;
+			lc3msk_to_irqnr[i] = 26;
+		} else if(i & 0x02) {
+			lc0msk_to_irqnr[i] = 1;
+			lc1msk_to_irqnr[i] = 9;
+			lc2msk_to_irqnr[i] = 17;
+			lc3msk_to_irqnr[i] = 25;
+		} else if(i & 0x01) {
+			lc0msk_to_irqnr[i] = 0;
+			lc1msk_to_irqnr[i] = 8;
+			lc2msk_to_irqnr[i] = 16;
+			lc3msk_to_irqnr[i] = 24;
+		} else {
+			lc0msk_to_irqnr[i] = 0;
+			lc1msk_to_irqnr[i] = 0;
+			lc2msk_to_irqnr[i] = 0;
+			lc3msk_to_irqnr[i] = 0;
+		}
+	}
+
+	/* Indy uses an INT3, Indigo2 uses an INT2 */
+	if (sgi_guiness) {
+		ioc_icontrol = &sgi_i3regs->ints;
+		ioc_timers = &sgi_i3regs->timers;
+		ioc_tclear = &sgi_i3regs->tclear;
+	} else {
+		ioc_icontrol = &sgi_i2regs->ints;
+		ioc_timers = &sgi_i2regs->timers;
+		ioc_tclear = &sgi_i2regs->tclear;
+	}
+
+	/* Mask out all interrupts. */
+	ioc_icontrol->imask0 = 0;
+	ioc_icontrol->imask1 = 0;
+	ioc_icontrol->cmeimask0 = 0;
+	ioc_icontrol->cmeimask1 = 0;
+
+	/* Now safe to set the exception vector. */
+	set_except_vector(0, indyIRQ);
+
+#ifdef CONFIG_REMOTE_DEBUG
+	ctype = prom_getcmdline();
+	for(i = 0; i < strlen(ctype); i++) {
+		if(ctype[i]=='k' && ctype[i+1]=='g' &&
+		   ctype[i+2]=='d' && ctype[i+3]=='b' &&
+		   ctype[i+4]=='=' && ctype[i+5]=='t' &&
+		   ctype[i+6]=='t' && ctype[i+7]=='y' &&
+		   ctype[i+8]=='d' &&
+		   (ctype[i+9] == '1' || ctype[i+9] == '2')) {
+			printk("KGDB: Using serial line /dev/ttyd%d for "
+			       "session\n", (ctype[i+9] - '0'));
+				if(ctype[i+9]=='1')
+					rs_kgdb_hook(1);
+				else if(ctype[i+9]=='2')
+					rs_kgdb_hook(0);
+				else {
+					printk("KGDB: whoops bogon tty line "
+					       "requested, disabling session\n");
+				}
+
+		}
+	}
+#endif
+}
diff --git a/arch/mips64/sgi-ip22/ip22-irq.S b/arch/mips64/sgi-ip22/ip22-irq.S
new file mode 100644
index 000000000..9f4234598
--- /dev/null
+++ b/arch/mips64/sgi-ip22/ip22-irq.S
@@ -0,0 +1,129 @@
+/* $Id$
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * indyIRQ.S: Interrupt exception dispatch code for FullHouse and
+ *            Guiness.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ */
+#include <asm/asm.h>
+#include <asm/mipsregs.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+
+/* A lot of complication here is taken away because:
+ *
+ * 1) We handle one interrupt and return, sitting in a loop and moving across
+ *    all the pending IRQ bits in the cause register is _NOT_ the answer, the
+ *    common case is one pending IRQ so optimize in that direction.
+ *
+ * 2) We need not check against bits in the status register IRQ mask, that
+ *    would make this routine slow as hell.
+ *
+ * 3) Linux only thinks in terms of all IRQs on or all IRQs off, nothing in
+ *    between like BSD spl() brain-damage.
+ *
+ * Furthermore, the IRQs on the INDY look basically (barring software IRQs
+ * which we don't use at all) like:
+ *
+ *	MIPS IRQ	Source
+ *      --------        ------
+ *             0	Software (ignored)
+ *             1        Software (ignored)
+ *             2        Local IRQ level zero
+ *             3        Local IRQ level one
+ *             4        8254 Timer zero
+ *             5        8254 Timer one
+ *             6        Bus Error
+ *             7        R4k timer (what we use)
+ *
+ * We handle the IRQ according to _our_ priority which is:
+ *
+ * Highest ----     R4k Timer
+ *                  Local IRQ zero
+ *                  Local IRQ one
+ *                  Bus Error
+ *                  8254 Timer zero
+ * Lowest  ----     8254 Timer one
+ *
+ * then we just return, if multiple IRQs are pending then we will just take
+ * another exception, big deal.
+ */
+
+	.text
+	.set	noreorder
+	.set	noat
+	.align	5
+	NESTED(indyIRQ, PT_SIZE, sp)
+	SAVE_ALL
+	CLI
+	.set	at
+	mfc0	s0, CP0_CAUSE		# get irq mask
+
+	/* First we check for r4k counter/timer IRQ. */
+	andi	a0, s0, CAUSEF_IP7
+	beq	a0, zero, 1f
+	 andi	a0, s0, CAUSEF_IP2	# delay slot, check local level zero
+
+	/* Wheee, a timer interrupt. */
+	move	a0, sp
+	jal	indy_timer_interrupt
+	 nop				# delay slot
+
+	j	ret_from_irq
+	 nop				# delay slot
+
+1:
+	beq	a0, zero, 1f
+	 andi	a0, s0, CAUSEF_IP3	# delay slot, check local level one
+
+	/* Wheee, local level zero interrupt. */
+	jal	indy_local0_irqdispatch
+	 move	a0, sp			# delay slot
+
+	j	ret_from_irq
+	 nop				# delay slot
+
+1:
+	beq	a0, zero, 1f
+	 andi	a0, s0, CAUSEF_IP6	# delay slot, check bus error
+
+	/* Wheee, local level one interrupt. */
+	move	a0, sp
+	jal	indy_local1_irqdispatch
+	 nop
+
+	j	ret_from_irq
+	 nop
+
+1:
+	beq	a0, zero, 1f
+	 nop
+
+	/* Wheee, an asynchronous bus error... */
+	move	a0, sp
+	jal	indy_buserror_irq
+	 nop
+
+	j	ret_from_irq
+	 nop
+
+1:
+	/* Here by mistake?  This is possible, what can happen
+	 * is that by the time we take the exception the IRQ
+	 * pin goes low, so just leave if this is the case.
+	 */
+	andi	a0, s0, (CAUSEF_IP4 | CAUSEF_IP5)
+	beq	a0, zero, 1f
+
+	/* Must be one of the 8254 timers... */
+	move	a0, sp
+	jal	indy_8254timer_irq
+	 nop
+1:
+	j	ret_from_irq
+	 nop
+	END(indyIRQ)
diff --git a/arch/mips64/sgi-ip22/ip22-mc.c b/arch/mips64/sgi-ip22/ip22-mc.c
new file mode 100644
index 000000000..aa43afe28
--- /dev/null
+++ b/arch/mips64/sgi-ip22/ip22-mc.c
@@ -0,0 +1,161 @@
+/* $Id$
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * indy_mc.c: Routines for manipulating the INDY memory controller.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+
+#include <asm/addrspace.h>
+#include <asm/ptrace.h>
+#include <asm/sgi/sgimc.h>
+#include <asm/sgi/sgihpc.h>
+#include <asm/sgialib.h>
+
+/* #define DEBUG_SGIMC */
+
+struct sgimc_misc_ctrl *mcmisc_regs;
+unsigned long *rpsscounter;
+struct sgimc_dma_ctrl *dmactrlregs;
+
+static inline char *mconfig_string(unsigned long val)
+{
+	switch(val & SGIMC_MCONFIG_RMASK) {
+	case SGIMC_MCONFIG_FOURMB:
+		return "4MB";
+
+	case SGIMC_MCONFIG_EIGHTMB:
+		return "8MB";
+
+	case SGIMC_MCONFIG_SXTEENMB:
+		return "16MB";
+
+	case SGIMC_MCONFIG_TTWOMB:
+		return "32MB";
+
+	case SGIMC_MCONFIG_SFOURMB:
+		return "64MB";
+
+	case SGIMC_MCONFIG_OTEIGHTMB:
+		return "128MB";
+
+	default:
+		return "wheee, unknown";
+	};
+}
+
+void __init sgimc_init(void)
+{
+	unsigned long tmpreg;
+
+	mcmisc_regs = (struct sgimc_misc_ctrl *)(KSEG1+0x1fa00000);
+	rpsscounter = (unsigned long *) (KSEG1 + 0x1fa01004);
+	dmactrlregs = (struct sgimc_dma_ctrl *) (KSEG1+0x1fa02000);
+
+	printk("MC: SGI memory controller Revision %d\n",
+	       (int) mcmisc_regs->systemid & SGIMC_SYSID_MASKREV);
+
+#if 0 /* XXX Until I figure out what this bit really indicates XXX */
+	/* XXX Is this systemid bit reliable? */
+	if(mcmisc_regs->systemid & SGIMC_SYSID_EPRESENT) {
+		EISA_bus = 1;
+		printk("with EISA\n");
+	} else {
+		EISA_bus = 0;
+		printk("no EISA\n");
+	}
+#endif
+
+#ifdef DEBUG_SGIMC
+	prom_printf("sgimc_init: memconfig0<%s> mconfig1<%s>\n",
+		    mconfig_string(mcmisc_regs->mconfig0),
+		    mconfig_string(mcmisc_regs->mconfig1));
+
+	prom_printf("mcdump: cpuctrl0<%08lx> cpuctrl1<%08lx>\n",
+		    mcmisc_regs->cpuctrl0, mcmisc_regs->cpuctrl1);
+	prom_printf("mcdump: divider<%08lx>, gioparm<%04x>\n",
+		    mcmisc_regs->divider, mcmisc_regs->gioparm);
+#endif
+
+	/* Place the MC into a known state.  This must be done before
+	 * interrupts are first enabled etc.
+	 */
+
+	/* Step 1: The CPU/GIO error status registers will not latch
+	 *         up a new error status until the register has been
+	 *         cleared by the cpu.  These status registers are
+	 *         cleared by writing any value to them.
+	 */
+	mcmisc_regs->cstat = mcmisc_regs->gstat = 0;
+
+	/* Step 2: Enable all parity checking in cpu control register
+	 *         zero.
+	 */
+	tmpreg = mcmisc_regs->cpuctrl0;
+	tmpreg |= (SGIMC_CCTRL0_EPERRGIO | SGIMC_CCTRL0_EPERRMEM |
+		   SGIMC_CCTRL0_R4KNOCHKPARR);
+	mcmisc_regs->cpuctrl0 = tmpreg;
+
+	/* Step 3: Setup the MC write buffer depth, this is controlled
+	 *         in cpu control register 1 in the lower 4 bits.
+	 */
+	tmpreg = mcmisc_regs->cpuctrl1;
+	tmpreg &= ~0xf;
+	tmpreg |= 0xd;
+	mcmisc_regs->cpuctrl1 = tmpreg;
+
+	/* Step 4: Initialize the RPSS divider register to run as fast
+	 *         as it can correctly operate.  The register is laid
+	 *         out as follows:
+	 *
+	 *         ----------------------------------------
+	 *         |  RESERVED  |   INCREMENT   | DIVIDER |
+	 *         ----------------------------------------
+	 *          31        16 15            8 7       0
+	 *
+	 *         DIVIDER determines how often a 'tick' happens,
+	 *         INCREMENT determines by how the RPSS increment
+	 *         registers value increases at each 'tick'. Thus,
+	 *         for IP22 we get INCREMENT=1, DIVIDER=1 == 0x101
+	 */
+	mcmisc_regs->divider = 0x101;
+
+	/* Step 5: Initialize GIO64 arbitrator configuration register.
+	 *
+	 * NOTE: If you dork with startup code the HPC init code in
+	 *       sgihpc_init() must run before us because of how we
+	 *       need to know Guiness vs. FullHouse and the board
+	 *       revision on this machine.  You have been warned.
+	 */
+
+	/* First the basic invariants across all gio64 implementations. */
+	tmpreg = SGIMC_GIOPARM_HPC64;    /* All 1st HPC's interface at 64bits. */
+	tmpreg |= SGIMC_GIOPARM_ONEBUS;  /* Only one physical GIO bus exists. */
+
+	if(sgi_guiness) {
+		/* Guiness specific settings. */
+		tmpreg |= SGIMC_GIOPARM_EISA64;     /* MC talks to EISA at 64bits */
+		tmpreg |= SGIMC_GIOPARM_MASTEREISA; /* EISA bus can act as master */
+	} else {
+		/* Fullhouse specific settings. */
+		if(sgi_boardid < 2) {
+			tmpreg |= SGIMC_GIOPARM_HPC264; /* 2nd HPC at 64bits */
+			tmpreg |= SGIMC_GIOPARM_PLINEEXP0; /* exp0 pipelines */
+			tmpreg |= SGIMC_GIOPARM_MASTEREXP1;/* exp1 masters */
+			tmpreg |= SGIMC_GIOPARM_RTIMEEXP0; /* exp0 is realtime */
+		} else {
+			tmpreg |= SGIMC_GIOPARM_HPC264; /* 2nd HPC 64bits */
+			tmpreg |= SGIMC_GIOPARM_PLINEEXP0; /* exp[01] pipelined */
+			tmpreg |= SGIMC_GIOPARM_PLINEEXP1;
+			tmpreg |= SGIMC_GIOPARM_MASTEREISA;/* EISA masters */
+			/* someone forgot this poor little guy... */
+			tmpreg |= SGIMC_GIOPARM_GFX64; 	/* GFX at 64 bits */
+		}
+	}
+	mcmisc_regs->gioparm = tmpreg; /* poof */
+}
diff --git a/arch/mips64/sgi-ip22/ip22-reset.c b/arch/mips64/sgi-ip22/ip22-reset.c
new file mode 100644
index 000000000..dc4fd0936
--- /dev/null
+++ b/arch/mips64/sgi-ip22/ip22-reset.c
@@ -0,0 +1,246 @@
+/* $Id$
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Reset an IP22.
+ *
+ * Copyright (C) 1997, 1998, 1999 by Ralf Baechle
+ */
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/notifier.h>
+#include <linux/timer.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+#include <asm/reboot.h>
+#include <asm/sgialib.h>
+#include <asm/sgi/sgihpc.h>
+#include <asm/sgi/sgint23.h>
+
+/*
+ * Just powerdown if init hasn't done after POWERDOWN_TIMEOUT seconds.
+ * I'm not shure if this feature is a good idea, for now it's here just to
+ * make the power button make behave just like under IRIX.
+ */
+#define POWERDOWN_TIMEOUT	120
+
+/*
+ * Blink frequency during reboot grace period and when paniced.
+ */
+#define POWERDOWN_FREQ		(HZ / 4)
+#define PANIC_FREQ		(HZ / 8)
+
+static unsigned char sgi_volume;
+
+static struct timer_list power_timer, blink_timer, debounce_timer, volume_timer;
+static int shuting_down, has_paniced;
+
+static void sgi_machine_restart(char *command) __attribute__((noreturn));
+static void sgi_machine_halt(void) __attribute__((noreturn));
+static void sgi_machine_power_off(void) __attribute__((noreturn));
+
+/* XXX How to pass the reboot command to the firmware??? */
+static void sgi_machine_restart(char *command)
+{
+	if (shuting_down)
+		sgi_machine_power_off();
+	prom_reboot();
+}
+
+static void sgi_machine_halt(void)
+{
+	if (shuting_down)
+		sgi_machine_power_off();
+	prom_imode();
+}
+
+static void sgi_machine_power_off(void)
+{
+	struct indy_clock *clock = (struct indy_clock *)INDY_CLOCK_REGS;
+
+	cli();
+
+	clock->cmd |= 0x08;	/* Disable watchdog */
+	clock->whsec = 0;
+	clock->wsec = 0;
+
+	while(1) {
+		hpc3mregs->panel=0xfe;
+		/* Good bye cruel world ...  */
+
+		/* If we're still running, we probably got sent an alarm
+		   interrupt.  Read the flag to clear it.  */
+		clock->halarm;
+	}
+}
+
+static void power_timeout(unsigned long data)
+{
+	sgi_machine_power_off();
+}
+
+static void blink_timeout(unsigned long data)
+{
+	/* XXX Fix this for Fullhouse  */
+	sgi_hpc_write1 ^= (HPC3_WRITE1_LC0OFF|HPC3_WRITE1_LC1OFF);
+	hpc3mregs->write1 = sgi_hpc_write1;
+
+	del_timer(&blink_timer);
+	blink_timer.expires = jiffies + data;
+	add_timer(&blink_timer);
+}
+
+static void debounce(unsigned long data)
+{
+	del_timer(&debounce_timer);
+	if (ioc_icontrol->istat1 & 2) { /* Interrupt still being sent.  */
+		debounce_timer.expires = jiffies + 5; /* 0.05s  */
+		add_timer(&debounce_timer);
+
+		hpc3mregs->panel = 0xf3;
+
+		return;
+	}
+
+	if (has_paniced)
+		prom_reboot();
+
+	enable_irq(9);
+}
+
+static inline void power_button(void)
+{
+	if (has_paniced)
+		return;
+
+	if (shuting_down || kill_proc(1, SIGINT, 1)) {
+		/* No init process or button pressed twice.  */
+		sgi_machine_power_off();
+	}
+
+	shuting_down = 1;
+	blink_timer.data = POWERDOWN_FREQ;
+	blink_timeout(POWERDOWN_FREQ);
+
+	init_timer(&power_timer);
+	power_timer.function = power_timeout;
+	power_timer.expires = jiffies + POWERDOWN_TIMEOUT * HZ;
+	add_timer(&power_timer);
+}
+
+void inline sgi_volume_set(unsigned char volume)
+{
+	sgi_volume = volume;
+
+	hpc3c0->pbus_extregs[2][0] = sgi_volume;
+	hpc3c0->pbus_extregs[2][1] = sgi_volume;
+}
+
+void inline sgi_volume_get(unsigned char *volume)
+{
+	*volume = sgi_volume;
+}
+
+static inline void volume_up_button(unsigned long data)
+{
+	del_timer(&volume_timer);
+
+	if (sgi_volume < 0xff)
+		sgi_volume++;
+
+	hpc3c0->pbus_extregs[2][0] = sgi_volume;
+	hpc3c0->pbus_extregs[2][1] = sgi_volume;
+
+	if (ioc_icontrol->istat1 & 2) {
+		volume_timer.expires = jiffies + 1;
+		add_timer(&volume_timer);
+	}
+
+}
+
+static inline void volume_down_button(unsigned long data)
+{
+	del_timer(&volume_timer);
+
+	if (sgi_volume > 0)
+		sgi_volume--;
+
+	hpc3c0->pbus_extregs[2][0] = sgi_volume;
+	hpc3c0->pbus_extregs[2][1] = sgi_volume;
+
+	if (ioc_icontrol->istat1 & 2) {
+		volume_timer.expires = jiffies + 1;
+		add_timer(&volume_timer);
+	}
+}
+
+static void panel_int(int irq, void *dev_id, struct pt_regs *regs)
+{
+	unsigned int buttons;
+
+	buttons = hpc3mregs->panel;
+	hpc3mregs->panel = 3; /* power_interrupt | power_supply_on */
+
+	if (ioc_icontrol->istat1 & 2) { /* Wait until interrupt goes away */
+		disable_irq(9);
+		init_timer(&debounce_timer);
+		debounce_timer.function = debounce;
+		debounce_timer.expires = jiffies + 5;
+		add_timer(&debounce_timer);
+	}
+
+	if (!(buttons & 2))		/* Power button was pressed */
+		power_button();
+	if (!(buttons & 0x40)) {	/* Volume up button was pressed */
+		init_timer(&volume_timer);
+		volume_timer.function = volume_up_button;
+		volume_timer.expires = jiffies + 1;
+		add_timer(&volume_timer);
+	}
+	if (!(buttons & 0x10)) {	/* Volume down button was pressed */
+		init_timer(&volume_timer);
+		volume_timer.function = volume_down_button;
+		volume_timer.expires = jiffies + 1;
+		add_timer(&volume_timer);
+	}
+}
+
+static int panic_event(struct notifier_block *this, unsigned long event,
+                      void *ptr)
+{
+	if (has_paniced)
+		return NOTIFY_DONE;
+	has_paniced = 1;
+
+	blink_timer.data = PANIC_FREQ;
+	blink_timeout(PANIC_FREQ);
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block panic_block = {
+	panic_event,
+	NULL,
+	0
+};
+
+void ip22_reboot_setup(void)
+{
+	static int setup_done;
+
+	if (setup_done)
+		return;
+	setup_done = 1;
+
+	_machine_restart = sgi_machine_restart;
+	_machine_halt = sgi_machine_halt;
+	_machine_power_off = sgi_machine_power_off;
+
+	request_irq(9, panel_int, 0, "Front Panel", NULL);
+	init_timer(&blink_timer);
+	blink_timer.function = blink_timeout;
+	notifier_chain_register(&panic_notifier_list, &panic_block);
+}
diff --git a/arch/mips64/sgi-ip22/ip22-rtc.c b/arch/mips64/sgi-ip22/ip22-rtc.c
new file mode 100644
index 000000000..f138ff27f
--- /dev/null
+++ b/arch/mips64/sgi-ip22/ip22-rtc.c
@@ -0,0 +1,37 @@
+/* $Id$
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * RTC routines for Indy style attached Dallas chip.
+ *
+ * Copyright (C) 1998 by Ralf Baechle
+ */
+#include <linux/mc146818rtc.h>
+#include <asm/sgi/sgihpc.h>
+
+static unsigned char indy_rtc_read_data(unsigned long addr)
+{
+	volatile unsigned int *rtcregs = (void *)INDY_CLOCK_REGS;
+
+	return rtcregs[addr];
+}
+
+static void indy_rtc_write_data(unsigned char data, unsigned long addr)
+{
+	volatile unsigned int *rtcregs = (void *)INDY_CLOCK_REGS;
+
+	rtcregs[addr] = data;
+}
+
+static int indy_rtc_bcd_mode(void)
+{
+	return 0;
+}
+
+struct rtc_ops indy_rtc_ops = {
+	&indy_rtc_read_data,
+	&indy_rtc_write_data,
+	&indy_rtc_bcd_mode
+};
diff --git a/arch/mips64/sgi-ip22/ip22-sc.c b/arch/mips64/sgi-ip22/ip22-sc.c
new file mode 100644
index 000000000..6c48e5611
--- /dev/null
+++ b/arch/mips64/sgi-ip22/ip22-sc.c
@@ -0,0 +1,227 @@
+/* $Id$
+ *
+ * indy_sc.c: Indy cache managment functions.
+ *
+ * Copyright (C) 1997 Ralf Baechle (ralf@gnu.org),
+ * derived from r4xx0.c by David S. Miller (dm@engr.sgi.com).
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/autoconf.h>
+
+#include <asm/bcache.h>
+#include <asm/sgi/sgimc.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/system.h>
+#include <asm/bootinfo.h>
+#include <asm/sgialib.h>
+#include <asm/mmu_context.h>
+
+/* Secondary cache size in bytes, if present.  */
+static unsigned long scache_size;
+
+#undef DEBUG_CACHE
+
+#define SC_SIZE 0x00080000
+#define SC_LINE 32
+#define CI_MASK (SC_SIZE - SC_LINE)
+#define SC_ROUND(n) ((n) + SC_LINE - 1)
+#define SC_INDEX(n) ((n) & CI_MASK)
+
+static inline void indy_sc_wipe(unsigned long first, unsigned long last)
+{
+	unsigned long tmp;
+
+	__asm__ __volatile__("
+		.set	noreorder
+		.set	mips3
+		.set	noat
+		mfc0	%2, $12
+		li	$1, 0x80	# Go 64 bit
+		mtc0	$1, $12
+
+		dli	$1, 0x9000000080000000
+		or	%0, $1		# first line to flush
+		or	%1, $1		# last line to flush
+		.set	at
+
+1:		sw	$0, 0(%0)
+		bne	%0, %1, 1b
+		daddu	%0, 32
+
+		mtc0	%2, $12		# Back to 32 bit
+		nop; nop; nop; nop;
+		.set mips0
+		.set reorder"
+		: "=r" (first), "=r" (last), "=&r" (tmp)
+		: "0" (first), "1" (last)
+		: "$1");
+}
+
+static void indy_sc_wback_invalidate(unsigned long addr, unsigned long size)
+{
+	unsigned long first_line, last_line;
+	unsigned int flags;
+
+#ifdef DEBUG_CACHE
+	printk("indy_sc_wback_invalidate[%08lx,%08lx]", addr, size);
+#endif
+	/* Which lines to flush?  */
+	first_line = SC_INDEX(addr);
+	last_line = SC_INDEX(SC_ROUND(addr + size));
+
+	__save_and_cli(flags);
+	if (first_line <= last_line) {
+		indy_sc_wipe(first_line, last_line);
+		goto out;
+	}
+
+	/* Cache index wrap around.  Due to the way the buddy system works
+	   this case should not happen.  We're prepared to handle it,
+	   though. */
+	indy_sc_wipe(last_line, SC_SIZE);
+	indy_sc_wipe(0, first_line);
+out:
+	__restore_flags(flags);
+}
+
+static void indy_sc_enable(void)
+{
+	unsigned long tmp1, tmp2, tmp3;
+
+	/* This is really cool... */
+#ifdef DEBUG_CACHE
+	printk("Enabling R4600 SCACHE\n");
+#endif
+	__asm__ __volatile__("
+		.set	push
+		.set	noreorder
+		.set	mips3
+		mfc0	%2, $12
+		nop; nop; nop; nop;
+		li	%1, 0x80
+		mtc0	%1, $12
+		nop; nop; nop; nop;
+		li	%0, 0x1
+		dsll	%0, 31
+		lui	%1, 0x9000
+		dsll32	%1, 0
+		or	%0, %1, %0
+		sb	$0, 0(%0)
+		mtc0	$0, $12
+		nop; nop; nop; nop;
+		mtc0	%2, $12
+		nop; nop; nop; nop;
+		.set	pop"
+		: "=r" (tmp1), "=r" (tmp2), "=r" (tmp3));
+}
+
+static void indy_sc_disable(void)
+{
+	unsigned long tmp1, tmp2, tmp3;
+
+#ifdef DEBUG_CACHE
+	printk("Disabling R4600 SCACHE\n");
+#endif
+	__asm__ __volatile__("
+		.set	push
+		.set	noreorder
+		.set	mips3
+		li	%0, 0x1
+		dsll	%0, 31
+		lui	%1, 0x9000
+		dsll32	%1, 0
+		or	%0, %1, %0
+		mfc0	%2, $12
+		nop; nop; nop; nop;
+		li	%1, 0x80
+		mtc0	%1, $12
+		nop; nop; nop; nop;
+		sh	$0, 0(%0)
+		mtc0	$0, $12
+		nop; nop; nop; nop;
+		mtc0	%2, $12
+		nop; nop; nop; nop;
+		.set	pop"
+        : "=r" (tmp1), "=r" (tmp2), "=r" (tmp3));
+}
+
+static inline __init int indy_sc_probe(void)
+{
+	volatile unsigned int *cpu_control;
+	unsigned short cmd = 0xc220;
+	unsigned long data = 0;
+	int i, n;
+
+#ifdef __MIPSEB__
+	cpu_control = (volatile unsigned int *) KSEG1ADDR(0x1fa00034);
+#else
+	cpu_control = (volatile unsigned int *) KSEG1ADDR(0x1fa00030);
+#endif
+#define DEASSERT(bit) (*(cpu_control) &= (~(bit)))
+#define ASSERT(bit) (*(cpu_control) |= (bit))
+#define DELAY  for(n = 0; n < 100000; n++) __asm__ __volatile__("")
+	DEASSERT(SGIMC_EEPROM_PRE);
+	DEASSERT(SGIMC_EEPROM_SDATAO);
+	DEASSERT(SGIMC_EEPROM_SECLOCK);
+	DEASSERT(SGIMC_EEPROM_PRE);
+	DELAY;
+	ASSERT(SGIMC_EEPROM_CSEL); ASSERT(SGIMC_EEPROM_SECLOCK);
+	for(i = 0; i < 11; i++) {
+		if(cmd & (1<<15))
+			ASSERT(SGIMC_EEPROM_SDATAO);
+		else
+			DEASSERT(SGIMC_EEPROM_SDATAO);
+		DEASSERT(SGIMC_EEPROM_SECLOCK);
+		ASSERT(SGIMC_EEPROM_SECLOCK);
+		cmd <<= 1;
+	}
+	DEASSERT(SGIMC_EEPROM_SDATAO);
+	for(i = 0; i < (sizeof(unsigned short) * 8); i++) {
+		unsigned int tmp;
+
+		DEASSERT(SGIMC_EEPROM_SECLOCK);
+		DELAY;
+		ASSERT(SGIMC_EEPROM_SECLOCK);
+		DELAY;
+		data <<= 1;
+		tmp = *cpu_control;
+		if(tmp & SGIMC_EEPROM_SDATAI)
+			data |= 1;
+	}
+	DEASSERT(SGIMC_EEPROM_SECLOCK);
+	DEASSERT(SGIMC_EEPROM_CSEL);
+	ASSERT(SGIMC_EEPROM_PRE);
+	ASSERT(SGIMC_EEPROM_SECLOCK);
+
+	data <<= PAGE_SHIFT;
+	if (data == 0)
+		return 0;
+
+	scache_size = data;
+
+	printk("R4600/R5000 SCACHE size %ldK, linesize 32 bytes.\n",
+	       scache_size >> 10);
+
+	return 1;
+}
+
+/* XXX Check with wje if the Indy caches can differenciate between
+   writeback + invalidate and just invalidate.  */
+struct bcache_ops indy_sc_ops = {
+	indy_sc_enable,
+	indy_sc_disable,
+	indy_sc_wback_invalidate,
+	indy_sc_wback_invalidate
+};
+
+void __init indy_sc_init(void)
+{
+	if (indy_sc_probe()) {
+		indy_sc_enable();
+		bcops = &indy_sc_ops;
+	}
+}
diff --git a/arch/mips64/sgi-ip22/ip22-setup.c b/arch/mips64/sgi-ip22/ip22-setup.c
new file mode 100644
index 000000000..d6051f166
--- /dev/null
+++ b/arch/mips64/sgi-ip22/ip22-setup.c
@@ -0,0 +1,173 @@
+/* $Id$
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * SGI IP22 specific setup.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ * Copyright (C) 1997, 1998, 1999 Ralf Baechle (ralf@gnu.org)
+ * Copyright (C) 1999 Silcon Graphics, Inc.
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/kbd_ll.h>
+#include <linux/kernel.h>
+#include <linux/kdev_t.h>
+#include <linux/types.h>
+#include <linux/console.h>
+#include <linux/sched.h>
+#include <linux/mc146818rtc.h>
+#include <linux/pc_keyb.h>
+
+#include <asm/addrspace.h>
+#include <asm/bcache.h>
+#include <asm/keyboard.h>
+#include <asm/irq.h>
+#include <asm/reboot.h>
+#include <asm/sgialib.h>
+#include <asm/sgi/sgi.h>
+#include <asm/sgi/sgimc.h>
+#include <asm/sgi/sgihpc.h>
+#include <asm/sgi/sgint23.h>
+
+extern struct rtc_ops indy_rtc_ops;
+void indy_reboot_setup(void);
+void sgi_volume_set(unsigned char);
+
+#define sgi_kh ((struct hpc_keyb *) (KSEG1 + 0x1fbd9800 + 64))
+
+#define KBD_STAT_IBF		0x02	/* Keyboard input buffer full */
+
+static void sgi_request_region(void)
+{
+	/* No I/O ports are being used on the Indy.  */
+}
+
+static int sgi_request_irq(void (*handler)(int, void *, struct pt_regs *))
+{
+	/* Dirty hack, this get's called as a callback from the keyboard
+	   driver.  We piggyback the initialization of the front panel
+	   button handling on it even though they're technically not
+	   related with the keyboard driver in any way.  Doing it from
+	   indy_setup wouldn't work since kmalloc isn't initialized yet.  */
+	indy_reboot_setup();
+
+	return request_irq(SGI_KEYBOARD_IRQ, handler, 0, "keyboard", NULL);
+}
+
+static int sgi_aux_request_irq(void (*handler)(int, void *, struct pt_regs *))
+{
+	/* Nothing to do, interrupt is shared with the keyboard hw  */
+	return 0;
+}
+
+static void sgi_aux_free_irq(void)
+{
+	/* Nothing to do, interrupt is shared with the keyboard hw  */
+}
+
+static unsigned char sgi_read_input(void)
+{
+	return sgi_kh->data;
+}
+
+static void sgi_write_output(unsigned char val)
+{
+	int status;
+
+	do {
+		status = sgi_kh->command;
+	} while (status & KBD_STAT_IBF);
+	sgi_kh->data = val;
+}
+
+static void sgi_write_command(unsigned char val)
+{
+	int status;
+
+	do {
+		status = sgi_kh->command;
+	} while (status & KBD_STAT_IBF);
+	sgi_kh->command = val;
+}
+
+static unsigned char sgi_read_status(void)
+{
+	return sgi_kh->command;
+}
+
+struct kbd_ops sgi_kbd_ops = {
+	sgi_request_region,
+	sgi_request_irq,
+
+	sgi_aux_request_irq,
+	sgi_aux_free_irq,
+
+	sgi_read_input,
+	sgi_write_output,
+	sgi_write_command,
+	sgi_read_status
+};
+
+static void __init sgi_irq_setup(void)
+{
+	sgint_init();
+}
+
+void __init sgi_setup(void)
+{
+#ifdef CONFIG_SERIAL_CONSOLE
+	char *ctype;
+#endif
+
+	irq_setup = sgi_irq_setup;
+
+	/* Init the INDY HPC I/O controller.  Need to call this before
+	 * fucking with the memory controller because it needs to know the
+	 * boardID and whether this is a Guiness or a FullHouse machine.
+	 */
+	sgihpc_init();
+
+	/* Init INDY memory controller. */
+	sgimc_init();
+
+	/* Now enable boardcaches, if any. */
+	indy_sc_init();
+
+#ifdef CONFIG_SERIAL_CONSOLE
+	/* ARCS console environment variable is set to "g?" for
+	 * graphics console, it is set to "d" for the first serial
+	 * line and "d2" for the second serial line.
+	 */
+	ctype = prom_getenv("console");
+	if(*ctype == 'd') {
+		if(*(ctype+1)=='2')
+			console_setup ("ttyS1");
+		else
+			console_setup ("ttyS0");
+	}
+#endif
+#ifdef CONFIG_SGI_PROM_CONSOLE
+	console_setup("ttyS0");
+#endif
+	  
+	sgi_volume_set(simple_strtoul(prom_getenv("volume"), NULL, 10));
+
+#ifdef CONFIG_VT
+#ifdef CONFIG_SGI_NEWPORT_CONSOLE
+	conswitchp = &newport_con;
+#else
+	conswitchp = &dummy_con;
+#endif
+#endif
+	rtc_ops = &indy_rtc_ops;
+	kbd_ops = &sgi_kbd_ops;
+#ifdef CONFIG_PSMOUSE
+	aux_device_present = 0xaa;
+#endif
+#ifdef CONFIG_VIDEO_VINO
+	init_vino();
+#endif
+}
diff --git a/arch/mips64/sgi-ip22/ip22-timer.c b/arch/mips64/sgi-ip22/ip22-timer.c
new file mode 100644
index 000000000..c22651b86
--- /dev/null
+++ b/arch/mips64/sgi-ip22/ip22-timer.c
@@ -0,0 +1,292 @@
+/* $Id$
+ *
+ * indy_timer.c: Setting up the clock on the INDY 8254 controller.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ * Copytight (C) 1997, 1998 Ralf Baechle (ralf@gnu.org)
+ */
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/param.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/timex.h>
+#include <linux/kernel_stat.h>
+
+#include <asm/bootinfo.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/ptrace.h>
+#include <asm/system.h>
+#include <asm/sgi/sgi.h>
+#include <asm/sgi/sgihpc.h>
+#include <asm/sgi/sgint23.h>
+#include <asm/sgialib.h>
+
+
+/* Because of a bug in the i8254 timer we need to use the onchip r4k
+ * counter as our system wide timer interrupt running at 100HZ.
+ */
+static unsigned long r4k_offset; /* Amount to increment compare reg each time */
+static unsigned long r4k_cur;    /* What counter should be at next timer irq */
+
+static inline void ack_r4ktimer(unsigned long newval)
+{
+	write_32bit_cp0_register(CP0_COMPARE, newval);
+}
+
+static int set_rtc_mmss(unsigned long nowtime)
+{
+	struct indy_clock *clock = (struct indy_clock *)INDY_CLOCK_REGS;
+	int retval = 0;
+	int real_seconds, real_minutes, clock_minutes;
+
+#define FROB_FROM_CLOCK(x) (((x) & 0xf) | ((((x) & 0xf0) >> 4) * 10));
+#define FROB_TO_CLOCK(x)  ((((((x) & 0xff) / 10)<<4) | (((x) & 0xff) % 10)) & 0xff)
+
+	clock->cmd &= ~(0x80);
+	clock_minutes = clock->min;
+	clock->cmd |= (0x80);
+
+	clock_minutes = FROB_FROM_CLOCK(clock_minutes);
+	real_seconds = nowtime % 60;
+	real_minutes = nowtime / 60;
+
+	if(((abs(real_minutes - clock_minutes) + 15)/30) & 1)
+		real_minutes += 30; /* correct for half hour time zone */
+
+	real_minutes %= 60;
+	if(abs(real_minutes - clock_minutes) < 30) {
+		/* Force clock oscillator to be on. */
+		clock->month &= ~(0x80);
+
+		/* Write real_seconds and real_minutes into the Dallas. */
+		clock->cmd &= ~(0x80);
+		clock->sec = real_seconds;
+		clock->min = real_minutes;
+		clock->cmd |= (0x80);
+	} else
+		return -1;
+
+#undef FROB_FROM_CLOCK
+#undef FROB_TO_CLOCK
+
+	return retval;
+}
+
+static long last_rtc_update = 0;
+unsigned long missed_heart_beats = 0;
+
+void indy_timer_interrupt(struct pt_regs *regs)
+{
+	unsigned long count;
+	int irq = 7;
+
+	/* Ack timer and compute new compare. */
+	count = read_32bit_cp0_register(CP0_COUNT);
+	/* This has races.  */
+	if ((count - r4k_cur) >= r4k_offset) {
+		/* If this happens to often we'll need to compensate.  */
+		missed_heart_beats++;
+		r4k_cur = count + r4k_offset;
+	}
+        else
+            r4k_cur += r4k_offset;
+	ack_r4ktimer(r4k_cur);
+	kstat.irqs[0][irq]++;
+	do_timer(regs);
+
+	/* We update the Dallas time of day approx. every 11 minutes,
+	 * because of how the numbers work out we need to make
+	 * absolutely sure we do this update within 500ms before the
+	 * next second starts, thus the following code.
+	 */
+	if ((time_status & STA_UNSYNC) == 0 &&
+	    xtime.tv_sec > last_rtc_update + 660 &&
+	    xtime.tv_usec >= 500000 - (tick >> 1) &&
+	    xtime.tv_usec <= 500000 + (tick >> 1)) {
+		if (set_rtc_mmss(xtime.tv_sec) == 0)
+			last_rtc_update = xtime.tv_sec;
+		else
+			/* do it again in 60s  */
+			last_rtc_update = xtime.tv_sec - 600;
+	}
+}
+
+static unsigned long dosample(volatile unsigned char *tcwp,
+                              volatile unsigned char *tc2p)
+{
+	unsigned long ct0, ct1;
+	unsigned char msb, lsb;
+
+	/* Start the counter. */
+	*tcwp = (SGINT_TCWORD_CNT2 | SGINT_TCWORD_CALL | SGINT_TCWORD_MRGEN);
+	*tc2p = (SGINT_TCSAMP_COUNTER & 0xff);
+	*tc2p = (SGINT_TCSAMP_COUNTER >> 8);
+
+	/* Get initial counter invariant */
+	ct0 = read_32bit_cp0_register(CP0_COUNT);
+
+	/* Latch and spin until top byte of counter2 is zero */
+	do {
+		*tcwp = (SGINT_TCWORD_CNT2 | SGINT_TCWORD_CLAT);
+		lsb = *tc2p;
+		msb = *tc2p;
+		ct1 = read_32bit_cp0_register(CP0_COUNT);
+	} while(msb);
+
+	/* Stop the counter. */
+	*tcwp = (SGINT_TCWORD_CNT2 | SGINT_TCWORD_CALL | SGINT_TCWORD_MSWST);
+
+	/* Return the difference, this is how far the r4k counter increments
+	 * for every one HZ.
+	 */
+	return ct1 - ct0;
+}
+
+/* Converts Gregorian date to seconds since 1970-01-01 00:00:00.
+ * Assumes input in normal date format, i.e. 1980-12-31 23:59:59
+ * => year=1980, mon=12, day=31, hour=23, min=59, sec=59.
+ *
+ * [For the Julian calendar (which was used in Russia before 1917,
+ * Britain & colonies before 1752, anywhere else before 1582,
+ * and is still in use by some communities) leave out the
+ * -year/100+year/400 terms, and add 10.]
+ *
+ * This algorithm was first published by Gauss (I think).
+ *
+ * WARNING: this function will overflow on 2106-02-07 06:28:16 on
+ * machines were long is 32-bit! (However, as time_t is signed, we
+ * will already get problems at other places on 2038-01-19 03:14:08)
+ */
+static inline unsigned long mktime(unsigned int year, unsigned int mon,
+	unsigned int day, unsigned int hour,
+	unsigned int min, unsigned int sec)
+{
+	if (0 >= (int) (mon -= 2)) {	/* 1..12 -> 11,12,1..10 */
+		mon += 12;	/* Puts Feb last since it has leap day */
+		year -= 1;
+	}
+	return (((
+	    (unsigned long)(year/4 - year/100 + year/400 + 367*mon/12 + day) +
+	      year*365 - 719499
+	    )*24 + hour /* now have hours */
+	   )*60 + min /* now have minutes */
+	  )*60 + sec; /* finally seconds */
+}
+
+static unsigned long __init get_indy_time(void)
+{
+	struct indy_clock *clock = (struct indy_clock *)INDY_CLOCK_REGS;
+	unsigned int year, mon, day, hour, min, sec;
+
+	/* Freeze it. */
+	clock->cmd &= ~(0x80);
+
+	/* Read regs. */
+	sec = clock->sec;
+	min = clock->min;
+	hour = (clock->hr & 0x3f);
+	day = (clock->date & 0x3f);
+	mon = (clock->month & 0x1f);
+	year = clock->year;
+
+	/* Unfreeze clock. */
+	clock->cmd |= 0x80;
+
+	/* Frob the bits. */
+#define FROB1(x)  (((x) & 0xf) + ((((x) & 0xf0) >> 4) * 10));
+#define FROB2(x)  (((x) & 0xf) + (((((x) & 0xf0) >> 4) & 0x3) * 10));
+
+	/* XXX Should really check that secs register is the same
+	 * XXX as when we first read it and if not go back and
+	 * XXX read the regs above again.
+	 */
+	sec = FROB1(sec); min = FROB1(min); day = FROB1(day);
+	mon = FROB1(mon); year = FROB1(year);
+	hour = FROB2(hour);
+
+#undef FROB1
+#undef FROB2
+
+	/* Wheee... */
+	if(year < 45)
+		year += 30;
+	if ((year += 1940) < 1970)
+		year += 100;
+
+	return mktime(year, mon, day, hour, min, sec);
+}
+
+#define ALLINTS (IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3 | IE_IRQ4 | IE_IRQ5)
+
+void __init indy_timer_init(void)
+{
+	struct sgi_ioc_timers *p;
+	volatile unsigned char *tcwp, *tc2p;
+
+	/* Figure out the r4k offset, the algorithm is very simple
+	 * and works in _all_ cases as long as the 8254 counter
+	 * register itself works ok (as an interrupt driving timer
+	 * it does not because of bug, this is why we are using
+	 * the onchip r4k counter/compare register to serve this
+	 * purpose, but for r4k_offset calculation it will work
+	 * ok for us).  There are other very complicated ways
+	 * of performing this calculation but this one works just
+	 * fine so I am not going to futz around. ;-)
+	 */
+	p = ioc_timers;
+	tcwp = &p->tcword;
+	tc2p = &p->tcnt2;
+
+	printk("calculating r4koff... ");
+	dosample(tcwp, tc2p);			/* First sample. */
+	dosample(tcwp, tc2p);			/* Eat one.	*/
+	r4k_offset = dosample(tcwp, tc2p);	/* Second sample. */
+
+	printk("%08lx(%d)\n", r4k_offset, (int) r4k_offset);
+
+	r4k_cur = (read_32bit_cp0_register(CP0_COUNT) + r4k_offset);
+	write_32bit_cp0_register(CP0_COMPARE, r4k_cur);
+	set_cp0_status(ST0_IM, ALLINTS);
+	sti();
+
+	/* Read time from the dallas chipset. */
+	xtime.tv_sec = get_indy_time();
+	xtime.tv_usec = 0;
+}
+
+void indy_8254timer_irq(void)
+{
+	int cpu = smp_processor_id();
+	int irq = 4;
+
+	hardirq_enter(cpu);
+	kstat.irqs[0][irq]++;
+	printk("indy_8254timer_irq: Whoops, should not have gotten this IRQ\n");
+	prom_getchar();
+	prom_imode();
+	hardirq_exit(cpu);
+}
+
+void do_gettimeofday(struct timeval *tv)
+{
+	unsigned long flags;
+
+	save_and_cli(flags);
+	*tv = xtime;
+	restore_flags(flags);
+}
+
+void do_settimeofday(struct timeval *tv)
+{
+	cli();
+	xtime = *tv;
+	time_state = TIME_BAD;
+	time_maxerror = MAXPHASE;
+	time_esterror = MAXPHASE;
+	sti();
+}
diff --git a/arch/mips64/sgi-ip22/system.c b/arch/mips64/sgi-ip22/system.c
new file mode 100644
index 000000000..69237a9f5
--- /dev/null
+++ b/arch/mips64/sgi-ip22/system.c
@@ -0,0 +1,135 @@
+/* $Id$
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * system.c: Probe the system type using ARCS prom interface library.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/string.h>
+
+#include <asm/sgi/sgi.h>
+#include <asm/sgialib.h>
+#include <asm/bootinfo.h>
+
+enum sgi_mach sgimach;
+
+struct smatch {
+	char *name;
+	int type;
+};
+
+static struct smatch sgi_cputable[] = {
+	{ "MIPS-R2000", CPU_R2000 },
+	{ "MIPS-R3000", CPU_R3000 },
+	{ "MIPS-R3000A", CPU_R3000A },
+	{ "MIPS-R4000", CPU_R4000SC },
+	{ "MIPS-R4400", CPU_R4400SC },
+	{ "MIPS-R4600", CPU_R4600 },
+	{ "MIPS-R8000", CPU_R8000 },
+	{ "MIPS-R5000", CPU_R5000 },
+	{ "MIPS-R5000A", CPU_R5000A }
+};
+
+#define NUM_CPUS 9 /* for now */
+
+static int __init string_to_cpu(char *s)
+{
+	int i;
+
+	for(i = 0; i < NUM_CPUS; i++) {
+		if(!strcmp(s, sgi_cputable[i].name))
+			return sgi_cputable[i].type;
+	}
+	prom_printf("\nYeee, could not determine MIPS cpu type <%s>\n", s);
+	prom_printf("press a key to reboot\n");
+	prom_getchar();
+	romvec->imode();
+	return 0;
+}
+
+/*
+ * We' call this early before loadmmu().  If we do the other way around
+ * the firmware will crash and burn.
+ */
+void __init sgi_sysinit(void)
+{
+	pcomponent *p, *toplev, *cpup = 0;
+	int cputype = -1;
+
+
+	/* The root component tells us what machine architecture we
+	 * have here.
+	 */
+	p = prom_getchild(PROM_NULL_COMPONENT);
+
+	/* Now scan for cpu(s). */
+	toplev = p = prom_getchild(p);
+	while(p) {
+		int ncpus = 0;
+
+		if(p->type == Cpu) {
+			if(++ncpus > 1) {
+				prom_printf("\nYeee, SGI MP not ready yet\n");
+				prom_printf("press a key to reboot\n");
+				prom_getchar();
+				romvec->imode();
+			}
+			printk("CPU: %s ", p->iname);
+			cpup = p;
+			cputype = string_to_cpu(cpup->iname);
+		}
+		p = prom_getsibling(p);
+	}
+	if(cputype == -1) {
+		prom_printf("\nYeee, could not find cpu ARCS component\n");
+		prom_printf("press a key to reboot\n");
+		prom_getchar();
+		romvec->imode();
+	}
+	p = prom_getchild(cpup);
+	while(p) {
+		switch(p->class) {
+		case processor:
+			switch(p->type) {
+			case Fpu:
+				printk("FPU<%s> ", p->iname);
+				break;
+
+			default:
+				break;
+			};
+			break;
+
+		case cache:
+			switch(p->type) {
+			case picache:
+				printk("ICACHE ");
+				break;
+
+			case pdcache:
+				printk("DCACHE ");
+				break;
+
+			case sccache:
+				printk("SCACHE ");
+				break;
+
+			default:
+				break;
+
+			};
+			break;
+
+		default:
+			break;
+		};
+		p = prom_getsibling(p);
+	}
+	printk("\n");
+}
diff --git a/arch/mips64/sgi-ip22/time.c b/arch/mips64/sgi-ip22/time.c
new file mode 100644
index 000000000..5d1d907de
--- /dev/null
+++ b/arch/mips64/sgi-ip22/time.c
@@ -0,0 +1,20 @@
+/* $Id$
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * time.c: Generic SGI time_init() code, this will dispatch to the
+ *         appropriate per-architecture time/counter init code.
+ *
+ * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ */
+#include <linux/init.h>
+
+extern void indy_timer_init(void);
+
+void __init time_init(void)
+{
+	/* XXX assume INDY for now XXX */
+	indy_timer_init();
+}