Import of Linux/MIPS 2.1.14

1 files changed, 246 insertions, 0 deletions

diff --git a/arch/ppc/kernel/setup.c b/arch/ppc/kernel/setup.c
new file mode 100644
index 000000000..6f330b052
--- /dev/null
+++ b/arch/ppc/kernel/setup.c
@@ -0,0 +1,246 @@
+/*
+ *  linux/arch/ppc/kernel/setup.c
+ *
+ *  Copyright (C) 1995  Linus Torvalds
+ *  Adapted from 'alpha' version by Gary Thomas
+ */
+
+/*
+ * bootup setup stuff..
+ */
+
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/stddef.h>
+#include <linux/unistd.h>
+#include <linux/ptrace.h>
+#include <linux/malloc.h>
+#include <linux/ldt.h>
+#include <linux/user.h>
+#include <linux/a.out.h>
+#include <linux/tty.h>
+#include <linux/major.h>
+
+#define SIO_CONFIG_RA	0x398
+#define SIO_CONFIG_RD	0x399
+
+#include <asm/pgtable.h>
+
+extern unsigned long *end_of_DRAM;
+extern PTE *Hash;
+extern unsigned long Hash_size, Hash_mask;
+
+char sda_root[] = "root=/dev/sda1";
+extern int root_mountflags;
+
+unsigned char aux_device_present;
+#ifdef CONFIG_BLK_DEV_RAM
+extern int rd_doload;		/* 1 = load ramdisk, 0 = don't load */
+extern int rd_prompt;		/* 1 = prompt for ramdisk, 0 = don't prompt */
+extern int rd_image_start;	/* starting block # of image */
+#endif
+
+/*
+ * The format of "screen_info" is strange, and due to early
+ * i386-setup code. This is just enough to make the console
+ * code think we're on a EGA+ colour display.
+ */
+ /* this is changed only in minor ways from the original
+        -- Cort
+ */
+struct screen_info screen_info = {
+	0, 25,			/* orig-x, orig-y */
+	{ 0, 0 },		/* unused */
+	0,			/* orig-video-page */
+	0,			/* orig-video-mode */
+	80,			/* orig-video-cols */
+	0,0,0,			/* ega_ax, ega_bx, ega_cx */
+	25,			/* orig-video-lines */
+	1,			/* orig-video-isVGA */
+	16			/* orig-video-points */
+};
+
+
+unsigned long bios32_init(unsigned long memory_start, unsigned long memory_end)
+{
+	return memory_start;
+}
+
+unsigned long find_end_of_memory(void)
+{
+	unsigned char dram_size = inb(0x0804);
+	unsigned long total;
+	extern BAT BAT2;
+printk("DRAM Size = %x\n", dram_size);
+printk("Config registers = %x/%x/%x/%x\n", inb(0x0800), inb(0x0801), inb(0x0802), inb(0x0803));
+	switch (dram_size & 0x07)
+	{
+		case 0:
+			total = 0x08000000;  /* 128M */
+			break;
+		case 1:
+			total = 0x02000000;  /* 32M */
+			break;
+		case 2:
+			total = 0x00800000;  /* 8M */
+			break;
+		case 3:
+			total = 0x00400000;  /* 4M - can't happen! */
+			break;
+		case 4:
+			total = 0x10000000;  /* 256M */
+			break;
+		case 5:
+			total = 0x04000000;  /* 64M */
+			break;
+		case 6:
+			total = 0x01000000;  /* 16M */
+			break;
+		case 7:
+			total = 0x04000000;  /* Can't happen */
+			break;
+	}
+	switch ((dram_size>>4) & 0x07)
+	{
+		case 0:
+			total += 0x08000000;  /* 128M */
+			break;
+		case 1:
+			total += 0x02000000;  /* 32M */
+			break;
+		case 2:
+			total += 0x00800000;  /* 8M */
+			break;
+		case 3:
+			total += 0x00000000;  /* Module not present */
+			break;
+		case 4:
+			total += 0x10000000;  /* 256M */
+			break;
+		case 5:
+			total += 0x04000000;  /* 64M */
+			break;
+		case 6:
+			total += 0x01000000;  /* 16M */
+			break;
+		case 7:
+			total += 0x00000000;  /* Module not present */
+			break;
+	}
+/* TEMP */ total = 0x01000000;
+/* _cnpause();	*/
+/* CAUTION!! This can be done more elegantly! */	
+	if (total < 0x01000000)
+	{
+		Hash_size = HASH_TABLE_SIZE_64K;
+		Hash_mask = HASH_TABLE_MASK_64K;
+	} else
+	{
+		Hash_size = HASH_TABLE_SIZE_128K;
+		Hash_mask = HASH_TABLE_MASK_128K;
+	}
+	switch(total)
+	{
+	  case 0x01000000:
+/*	    BAT2[0][1] = BL_16M;*/
+	    break;
+	  default:
+	    printk("WARNING: setup.c: find_end_of_memory() unknown total ram size %x\n", total);
+	    break;
+	}
+	
+	Hash = (PTE *)((total-Hash_size)+KERNELBASE);
+	bzero(Hash, Hash_size);
+	return ((unsigned long)Hash);
+}
+
+int size_memory;
+
+/* #define DEFAULT_ROOT_DEVICE 0x0200	/* fd0 */
+#define DEFAULT_ROOT_DEVICE 0x0801	/* sda1 */
+
+void setup_arch(char **cmdline_p,
+	unsigned long * memory_start_p, unsigned long * memory_end_p)
+{
+	extern int _end;
+	extern char cmd_line[];
+	unsigned char reg;
+
+	/* Set up floppy in PS/2 mode */
+	outb(0x09, SIO_CONFIG_RA);
+	reg = inb(SIO_CONFIG_RD);
+	reg = (reg & 0x3F) | 0x40;
+	outb(reg, SIO_CONFIG_RD);
+	outb(reg, SIO_CONFIG_RD);	/* Have to write twice to change! */
+	ROOT_DEV = to_kdev_t(DEFAULT_ROOT_DEVICE);
+        /*ROOT_DEV = MKDEV(UNNAMED_MAJOR, 255);*/	/* nfs */
+	aux_device_present = 0xaa;
+  /*nfsaddrs=myip:serverip:gateip:netmaskip:clientname*/
+  strcpy(cmd_line,
+    "nfsaddrs=129.138.6.13:129.138.6.90:129.138.6.1:255.255.255.0:pandora");
+  /*  strcpy(cmd_line,"root=/dev/sda1");*/
+	*cmdline_p = cmd_line;
+	*memory_start_p = (unsigned long) &_end;
+	*memory_end_p = (unsigned long *)end_of_DRAM;
+	size_memory = *memory_end_p - KERNELBASE;  /* Relative size of memory */
+
+#ifdef CONFIG_BLK_DEV_RAM
+  rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
+  rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
+  rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
+  rd_prompt = 0;
+  rd_doload = 0;
+  rd_image_start = 0;
+#endif  	
+}
+
+asmlinkage int sys_ioperm(unsigned long from, unsigned long num, int on)
+{
+	return -EIO;
+}
+#if 0
+extern char builtin_ramdisk_image;
+extern long builtin_ramdisk_size;
+
+void
+builtin_ramdisk_init(void)
+{
+	if ((ROOT_DEV == to_kdev_t(DEFAULT_ROOT_DEVICE)) && (builtin_ramdisk_size != 0))
+	{
+		rd_preloaded_init(&builtin_ramdisk_image, builtin_ramdisk_size);
+	} else
+	{  /* Not ramdisk - assume root needs to be mounted read only */
+		root_mountflags |= MS_RDONLY;
+	}
+}
+#endif
+#define MAJOR(n) (((n)&0xFF00)>>8)
+#define MINOR(n) ((n)&0x00FF)
+
+int
+get_cpuinfo(char *buffer)
+{
+	int pvr = _get_PVR();
+	char *model;
+	switch (pvr>>16)
+	{
+		case 3:
+			model = "603";
+			break;
+		case 4:
+			model = "604";
+			break;
+		case 6:
+			model = "603e";
+			break;
+		case 7:
+			model = "603ev";
+			break;
+		default:
+			model = "unknown";
+			break;
+	}
+	return sprintf(buffer, "PowerPC %s rev %d.%d\n", model, MAJOR(pvr), MINOR(pvr));
+}