12 files changed, 121 insertions, 425 deletions

diff --git a/arch/mips/arc/Makefile b/arch/mips/arc/Makefile
index 7bfefcfba..e37207b33 100644
--- a/arch/mips/arc/Makefile
+++ b/arch/mips/arc/Makefile
@@ -10,7 +10,11 @@
 # Note 2! The CFLAGS definitions are now in the main makefile...
 
 L_TARGET = arclib.a
-L_OBJS  = console.o init.o printf.o memory.o tree.o env.o cmdline.o misc.o \
-	  time.o file.o identify.o
+L_OBJS  = console.o init.o memory.o tree.o env.o cmdline.o misc.o time.o \
+	  file.o identify.o
+
+ifdef CONFIG_ARC_CONSOLE
+L_OBJS   += arc_con.o
+endif
 
 include $(TOPDIR)/Rules.make
diff --git a/arch/mips/arc/arc_con.c b/arch/mips/arc/arc_con.c
new file mode 100644
index 000000000..6fe94a6c7
--- /dev/null
+++ b/arch/mips/arc/arc_con.c
@@ -0,0 +1,69 @@
+/*
+ * Wrap-around code for a console using the
+ * ARC io-routines.
+ *
+ * Copyright (c) 1998 Harald Koerfgen 
+ */
+
+#include <linux/tty.h>
+#include <linux/major.h>
+#include <linux/ptrace.h>
+#include <linux/init.h>
+#include <linux/console.h>
+#include <linux/fs.h>
+
+extern char prom_getchar (void);
+extern void prom_printf (char *, ...);
+
+static void prom_console_write(struct console *co, const char *s,
+			       unsigned count)
+{
+	unsigned i;
+
+	/*
+	 *    Now, do each character
+	 */
+	for (i = 0; i < count; i++) {
+		if (*s == 10)
+			prom_printf("%c", 13);
+		prom_printf("%c", *s++);
+	}
+}
+
+static int prom_console_wait_key(struct console *co)
+{
+	return prom_getchar();
+}
+
+static int __init prom_console_setup(struct console *co, char *options)
+{
+	return 0;
+}
+
+static kdev_t prom_console_device(struct console *c)
+{
+	return MKDEV(TTY_MAJOR, 64 + c->index);
+}
+
+static struct console arc_cons = {
+	"ttyS",
+	prom_console_write,
+	NULL,
+	prom_console_device,
+	prom_console_wait_key,
+	NULL,
+	prom_console_setup,
+	CON_PRINTBUFFER,
+	-1,
+	0,
+	NULL
+};
+
+/*
+ *    Register console.
+ */
+
+void __init arc_console_init(void)
+{
+	register_console(&arc_cons);
+}
diff --git a/arch/mips/arc/cmdline.c b/arch/mips/arc/cmdline.c
index d60ff2bab..ba356e65d 100644
--- a/arch/mips/arc/cmdline.c
+++ b/arch/mips/arc/cmdline.c
@@ -12,7 +12,7 @@
 #include <asm/sgialib.h>
 #include <asm/bootinfo.h>
 
-/* #define DEBUG_CMDLINE */
+#undef DEBUG_CMDLINE
 
 char arcs_cmdline[CL_SIZE];
 
diff --git a/arch/mips/arc/console.c b/arch/mips/arc/console.c
index 4de5130fb..cf367a3c1 100644
--- a/arch/mips/arc/console.c
+++ b/arch/mips/arc/console.c
@@ -8,6 +8,7 @@
  */
 #include <linux/config.h>
 #include <linux/init.h>
+#include <linux/kernel.h>
 #include <asm/sgialib.h>
 #include <asm/bcache.h>
 
@@ -20,7 +21,7 @@
  */
 extern struct bcache_ops *bcops;
 
-#ifdef CONFIG_SGI_PROM_CONSOLE
+#ifdef CONFIG_ARC_CONSOLE
 void prom_putchar(char c)
 #else
 void __init prom_putchar(char c)
@@ -34,7 +35,7 @@ void __init prom_putchar(char c)
 	bcops->bc_enable();
 }
 
-#ifdef CONFIG_SGI_PROM_CONSOLE
+#ifdef CONFIG_ARC_CONSOLE
 char prom_getchar(void)
 #else
 char __init prom_getchar(void)
@@ -48,3 +49,30 @@ char __init prom_getchar(void)
 	bcops->bc_enable();
 	return c;
 }
+
+static char ppbuf[1024];
+
+#ifdef CONFIG_ARC_CONSOLE
+void prom_printf(char *fmt, ...)
+#else
+void __init prom_printf(char *fmt, ...)
+#endif
+{
+	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/mips/arc/printf.c b/arch/mips/arc/printf.c
deleted file mode 100644
index 78b1b5937..000000000
--- a/arch/mips/arc/printf.c
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * printf.c: Putting things on the screen using SGI arcs
- *           PROM facilities.
- *
- * Copyright (C) 1996 David S. Miller (dm@sgi.com)
- *
- * $Id: printf.c,v 1.3 1999/10/09 00:00:57 ralf Exp $
- */
-#include <linux/config.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-
-#include <asm/sgialib.h>
-
-static char ppbuf[1024];
-
-#ifdef CONFIG_SGI_PROM_CONSOLE
-void prom_printf(char *fmt, ...)
-#else
-void __init prom_printf(char *fmt, ...)
-#endif
-{
-	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/mips/config.in b/arch/mips/config.in
index e546eb5c2..8126ff15b 100644
--- a/arch/mips/config.in
+++ b/arch/mips/config.in
@@ -151,6 +151,10 @@ if [ "$CONFIG_CPU_LITTLE_ENDIAN" = "n" ]; then
    bool 'Include forward keyboard' CONFIG_FORWARD_KEYBOARD 
 fi
 
+if [ "$CONFIG_ARC32" = "y" ]; then
+   bool 'ARC console support' CONFIG_ARC_CONSOLE
+fi
+
 define_bool CONFIG_BINFMT_AOUT n
 define_bool CONFIG_BINFMT_ELF y
 tristate 'Kernel support for MISC binaries' CONFIG_BINFMT_MISC
@@ -337,7 +341,6 @@ if [ "$CONFIG_SGI_IP22" = "y" ]; then
       else
 	 define_bool CONFIG_FONT_8x16 y
       fi
-      bool 'SGI PROM Console Support' CONFIG_SGI_PROM_CONSOLE
    fi
    bool 'PS/2 mouse support' CONFIG_PSMOUSE
    if [ "$CONFIG_PSMOUSE" != "n" ]; then
diff --git a/arch/mips/defconfig b/arch/mips/defconfig
index 61436603d..99df6b011 100644
--- a/arch/mips/defconfig
+++ b/arch/mips/defconfig
@@ -24,6 +24,7 @@ CONFIG_SGI_IP22=y
 # CONFIG_SBUS is not set
 CONFIG_ARC32=y
 CONFIG_PC_KEYB=y
+# CONFIG_PSMOUSE is not set
 CONFIG_SGI=y
 # CONFIG_ISA is not set
 # CONFIG_PCI is not set
@@ -219,7 +220,7 @@ CONFIG_VT=y
 CONFIG_VT_CONSOLE=y
 CONFIG_SGI_NEWPORT_CONSOLE=y
 CONFIG_FONT_8x16=y
-# CONFIG_SGI_PROM_CONSOLE is not set
+# CONFIG_ARC_CONSOLE is not set
 # CONFIG_UNIX98_PTYS is not set
 
 #
diff --git a/arch/mips/defconfig-ip22 b/arch/mips/defconfig-ip22
index 61436603d..bef1b1f71 100644
--- a/arch/mips/defconfig-ip22
+++ b/arch/mips/defconfig-ip22
@@ -24,6 +24,7 @@ CONFIG_SGI_IP22=y
 # CONFIG_SBUS is not set
 CONFIG_ARC32=y
 CONFIG_PC_KEYB=y
+CONFIG_PSMOUSE=y
 CONFIG_SGI=y
 # CONFIG_ISA is not set
 # CONFIG_PCI is not set
@@ -219,7 +220,7 @@ CONFIG_VT=y
 CONFIG_VT_CONSOLE=y
 CONFIG_SGI_NEWPORT_CONSOLE=y
 CONFIG_FONT_8x16=y
-# CONFIG_SGI_PROM_CONSOLE is not set
+# CONFIG_ARC_CONSOLE is not set
 # CONFIG_UNIX98_PTYS is not set
 
 #
diff --git a/arch/mips/sgi/kernel/Makefile b/arch/mips/sgi/kernel/Makefile
index 6eb3f1775..f016cd12f 100644
--- a/arch/mips/sgi/kernel/Makefile
+++ b/arch/mips/sgi/kernel/Makefile
@@ -15,9 +15,6 @@
 
 OBJS  = indy_mc.o indy_sc.o indy_hpc.o indy_int.o indy_rtc.o \
         system.o indyIRQ.o reset.o setup.o time.o
-ifdef CONFIG_SGI_PROM_CONSOLE
-OBJS += promcon.o
-endif
 
 all: sgikern.a
 
diff --git a/arch/mips/sgi/kernel/indy_timer.c b/arch/mips/sgi/kernel/indy_timer.c
deleted file mode 100644
index 3306cdc25..000000000
--- a/arch/mips/sgi/kernel/indy_timer.c
+++ /dev/null
@@ -1,297 +0,0 @@
-/* $Id: indy_timer.c,v 1.17 2000/01/21 22:34:03 ralf Exp $
- *
- * 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/sgialib.h>
-#include <asm/sgi/sgi.h>
-#include <asm/sgi/sgihpc.h>
-#include <asm/sgi/sgint23.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 */
-
-extern rwlock_t xtime_lock;
-
-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;
-
-	write_lock(&xtime_lock);
-	/* 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 60 s */
-			last_rtc_update = xtime.tv_sec - 600;
-	}
-	write_unlock(&xtime_lock);
-}
-
-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();
-
-	write_lock_irq(&xtime_lock);
-	xtime.tv_sec = get_indy_time();		/* Read time from RTC. */
-	xtime.tv_usec = 0;
-	write_unlock_irq(&xtime_lock);
-}
-
-void indy_8254timer_irq(void)
-{
-	int cpu = smp_processor_id();
-	int irq = 4;
-
-	irq_enter(cpu);
-	kstat.irqs[0][irq]++;
-	printk("indy_8254timer_irq: Whoops, should not have gotten this IRQ\n");
-	prom_getchar();
-	prom_imode();
-	irq_exit(cpu);
-}
-
-void do_gettimeofday(struct timeval *tv)
-{
-	unsigned long flags;
-
-	read_lock_irqsave(&xtime_lock, flags);
-	*tv = xtime;
-	read_unlock_irqrestore(&xtime_lock, flags);
-}
-
-void do_settimeofday(struct timeval *tv)
-{
-	write_lock_irq(&xtime_lock);
-	xtime = *tv;
-	time_state = TIME_BAD;
-	time_maxerror = MAXPHASE;
-	time_esterror = MAXPHASE;
-	write_unlock_irq(&xtime_lock);
-}
diff --git a/arch/mips/sgi/kernel/promcon.c b/arch/mips/sgi/kernel/promcon.c
deleted file mode 100644
index 391f9613c..000000000
--- a/arch/mips/sgi/kernel/promcon.c
+++ /dev/null
@@ -1,72 +0,0 @@
-/*
- * Wrap-around code for a console using the
- * SGI PROM io-routines.
- *
- * Copyright (c) 1999 Ulf Carlsson
- *
- * Derived from DECstation promcon.c
- * Copyright (c) 1998 Harald Koerfgen 
- */
-
-#include <linux/tty.h>
-#include <linux/major.h>
-#include <linux/ptrace.h>
-#include <linux/init.h>
-#include <linux/console.h>
-#include <linux/fs.h>
-
-#include <asm/sgialib.h>
-
-static void prom_console_write(struct console *co, const char *s,
-			       unsigned count)
-{
-    unsigned i;
-
-    /*
-     *    Now, do each character
-     */
-    for (i = 0; i < count; i++) {
-	if (*s == 10)
-	    prom_printf("%c", 13);
-	prom_printf("%c", *s++);
-    }
-}
-
-static int prom_console_wait_key(struct console *co)
-{
-    return prom_getchar();
-}
-
-static int __init prom_console_setup(struct console *co, char *options)
-{
-    return 0;
-}
-
-static kdev_t prom_console_device(struct console *c)
-{
-    return MKDEV(TTY_MAJOR, 64 + c->index);
-}
-
-static struct console sercons =
-{
-    "ttyS",
-    prom_console_write,
-    NULL,
-    prom_console_device,
-    prom_console_wait_key,
-    NULL,
-    prom_console_setup,
-    CON_PRINTBUFFER,
-    -1,
-    0,
-    NULL
-};
-
-/*
- *    Register console.
- */
-
-void __init sgi_prom_console_init(void )
-{
-    register_console(&sercons);
-}
diff --git a/arch/mips/sgi/kernel/setup.c b/arch/mips/sgi/kernel/setup.c
index f511e98de..a1d4ca08e 100644
--- a/arch/mips/sgi/kernel/setup.c
+++ b/arch/mips/sgi/kernel/setup.c
@@ -32,7 +32,7 @@ extern void breakpoint(void);
 static int remote_debug = 0;
 #endif
 
-#if defined(CONFIG_SERIAL_CONSOLE) || defined(CONFIG_SGI_PROM_CONSOLE)
+#if defined(CONFIG_SERIAL_CONSOLE) || defined(CONFIG_ARC_CONSOLE)
 extern void console_setup(char *);
 #endif
 
@@ -180,7 +180,7 @@ void sgi_time_init (struct irqaction *irq) {
 	 */
         struct sgi_ioc_timers *p;
         volatile unsigned char *tcwp, *tc2p;
-	unsigned long r4k_ticks[3] = { 0, 0, 0 };
+	unsigned long r4k_ticks[3];
 	unsigned long r4k_next;
 
         /* Figure out the r4k offset, the algorithm is very simple
@@ -201,10 +201,12 @@ void sgi_time_init (struct irqaction *irq) {
         dosample(tcwp, tc2p);                   /* Prime cache. */
         dosample(tcwp, tc2p);                   /* Prime cache. */
 	/* Zero is NOT an option. */
-	while (!r4k_ticks[0])
+	do {
 		r4k_ticks[0] = dosample (tcwp, tc2p);
-	while (!r4k_ticks[1])
+	} while (!r4k_ticks[0]);
+	do {
 		r4k_ticks[1] = dosample (tcwp, tc2p);
+	} while (!r4k_ticks[1]);
 
 	if (r4k_ticks[0] != r4k_ticks[1]) {
 		printk ("warning: timer counts differ, retrying...");
@@ -290,7 +292,7 @@ void __init sgi_setup(void)
 	}
 #endif
 
-#ifdef CONFIG_SGI_PROM_CONSOLE
+#ifdef CONFIG_ARC_CONSOLE
 	console_setup("ttyS0");
 #endif