ppc: Remove CHRP, POWER3 and POWER4 support from arch/ppc

32-bit CHRP machines are now supported only in arch/powerpc, as are
all 64-bit PowerPC processors.  This means that we don't use
Open Firmware on any platform in arch/ppc any more.

This makes PReP support a single-platform option like every other
platform support option in arch/ppc now, thus CONFIG_PPC_MULTIPLATFORM
is gone from arch/ppc.  CONFIG_PPC_PREP is the option that selects
PReP support and is generally what has replaced
CONFIG_PPC_MULTIPLATFORM within arch/ppc.

_machine is all but dead now, being #defined to 0.

Updated Makefiles, comments and Kconfig options generally to reflect
these changes.

Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 0 insertions, 251 deletions

diff --git a/arch/ppc/platforms/chrp_time.c b/arch/ppc/platforms/chrp_time.c
deleted file mode 100644
index c8627770af13..000000000000
--- a/arch/ppc/platforms/chrp_time.c
+++ /dev/null
@@ -1,251 +0,0 @@
-/*
- *  Copyright (C) 1991, 1992, 1995  Linus Torvalds
- *
- * Adapted for PowerPC (PReP) by Gary Thomas
- * Modified by Cort Dougan (cort@cs.nmt.edu).
- * Copied and modified from arch/i386/kernel/time.c
- *
- */
-#include <linux/errno.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/time.h>
-#include <linux/timex.h>
-#include <linux/kernel_stat.h>
-#include <linux/mc146818rtc.h>
-#include <linux/init.h>
-#include <linux/bcd.h>
-
-#include <asm/io.h>
-#include <asm/nvram.h>
-#include <asm/prom.h>
-#include <asm/sections.h>
-#include <asm/time.h>
-
-extern spinlock_t rtc_lock;
-
-static int nvram_as1 = NVRAM_AS1;
-static int nvram_as0 = NVRAM_AS0;
-static int nvram_data = NVRAM_DATA;
-
-long __init chrp_time_init(void)
-{
-	struct device_node *rtcs;
-	int base;
-
-	rtcs = find_compatible_devices("rtc", "pnpPNP,b00");
-	if (rtcs == NULL)
-		rtcs = find_compatible_devices("rtc", "ds1385-rtc");
-	if (rtcs == NULL || rtcs->addrs == NULL)
-		return 0;
-	base = rtcs->addrs[0].address;
-	nvram_as1 = 0;
-	nvram_as0 = base;
-	nvram_data = base + 1;
-
-	return 0;
-}
-
-int chrp_cmos_clock_read(int addr)
-{
-	if (nvram_as1 != 0)
-		outb(addr>>8, nvram_as1);
-	outb(addr, nvram_as0);
-	return (inb(nvram_data));
-}
-
-void chrp_cmos_clock_write(unsigned long val, int addr)
-{
-	if (nvram_as1 != 0)
-		outb(addr>>8, nvram_as1);
-	outb(addr, nvram_as0);
-	outb(val, nvram_data);
-	return;
-}
-
-/*
- * Set the hardware clock. -- Cort
- */
-int chrp_set_rtc_time(unsigned long nowtime)
-{
-	unsigned char save_control, save_freq_select;
-	struct rtc_time tm;
-
-	spin_lock(&rtc_lock);
-	to_tm(nowtime, &tm);
-
-	save_control = chrp_cmos_clock_read(RTC_CONTROL); /* tell the clock it's being set */
-
-	chrp_cmos_clock_write((save_control|RTC_SET), RTC_CONTROL);
-
-	save_freq_select = chrp_cmos_clock_read(RTC_FREQ_SELECT); /* stop and reset prescaler */
-
-	chrp_cmos_clock_write((save_freq_select|RTC_DIV_RESET2), RTC_FREQ_SELECT);
-
-        tm.tm_year -= 1900;
-	if (!(save_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
-		BIN_TO_BCD(tm.tm_sec);
-		BIN_TO_BCD(tm.tm_min);
-		BIN_TO_BCD(tm.tm_hour);
-		BIN_TO_BCD(tm.tm_mon);
-		BIN_TO_BCD(tm.tm_mday);
-		BIN_TO_BCD(tm.tm_year);
-	}
-	chrp_cmos_clock_write(tm.tm_sec,RTC_SECONDS);
-	chrp_cmos_clock_write(tm.tm_min,RTC_MINUTES);
-	chrp_cmos_clock_write(tm.tm_hour,RTC_HOURS);
-	chrp_cmos_clock_write(tm.tm_mon,RTC_MONTH);
-	chrp_cmos_clock_write(tm.tm_mday,RTC_DAY_OF_MONTH);
-	chrp_cmos_clock_write(tm.tm_year,RTC_YEAR);
-
-	/* The following flags have to be released exactly in this order,
-	 * otherwise the DS12887 (popular MC146818A clone with integrated
-	 * battery and quartz) will not reset the oscillator and will not
-	 * update precisely 500 ms later. You won't find this mentioned in
-	 * the Dallas Semiconductor data sheets, but who believes data
-	 * sheets anyway ...                           -- Markus Kuhn
-	 */
-	chrp_cmos_clock_write(save_control, RTC_CONTROL);
-	chrp_cmos_clock_write(save_freq_select, RTC_FREQ_SELECT);
-
-	spin_unlock(&rtc_lock);
-	return 0;
-}
-
-unsigned long chrp_get_rtc_time(void)
-{
-	unsigned int year, mon, day, hour, min, sec;
-	int uip, i;
-
-	/* The Linux interpretation of the CMOS clock register contents:
-	 * When the Update-In-Progress (UIP) flag goes from 1 to 0, the
-	 * RTC registers show the second which has precisely just started.
-	 * Let's hope other operating systems interpret the RTC the same way.
-	 */
-
-	/* Since the UIP flag is set for about 2.2 ms and the clock
-	 * is typically written with a precision of 1 jiffy, trying
-	 * to obtain a precision better than a few milliseconds is
-	 * an illusion. Only consistency is interesting, this also
-	 * allows to use the routine for /dev/rtc without a potential
-	 * 1 second kernel busy loop triggered by any reader of /dev/rtc.
-	 */
-
-	for ( i = 0; i<1000000; i++) {
-		uip = chrp_cmos_clock_read(RTC_FREQ_SELECT);
-		sec = chrp_cmos_clock_read(RTC_SECONDS);
-		min = chrp_cmos_clock_read(RTC_MINUTES);
-		hour = chrp_cmos_clock_read(RTC_HOURS);
-		day = chrp_cmos_clock_read(RTC_DAY_OF_MONTH);
-		mon = chrp_cmos_clock_read(RTC_MONTH);
-		year = chrp_cmos_clock_read(RTC_YEAR);
-		uip |= chrp_cmos_clock_read(RTC_FREQ_SELECT);
-		if ((uip & RTC_UIP)==0) break;
-	}
-
-	if (!(chrp_cmos_clock_read(RTC_CONTROL) & RTC_DM_BINARY) || RTC_ALWAYS_BCD)
-	  {
-	    BCD_TO_BIN(sec);
-	    BCD_TO_BIN(min);
-	    BCD_TO_BIN(hour);
-	    BCD_TO_BIN(day);
-	    BCD_TO_BIN(mon);
-	    BCD_TO_BIN(year);
-	  }
-	if ((year += 1900) < 1970)
-		year += 100;
-	return mktime(year, mon, day, hour, min, sec);
-}
-
-/*
- * Calibrate the decrementer frequency with the VIA timer 1.
- */
-#define VIA_TIMER_FREQ_6	4700000	/* time 1 frequency * 6 */
-
-/* VIA registers */
-#define RS		0x200		/* skip between registers */
-#define T1CL		(4*RS)		/* Timer 1 ctr/latch (low 8 bits) */
-#define T1CH		(5*RS)		/* Timer 1 counter (high 8 bits) */
-#define T1LL		(6*RS)		/* Timer 1 latch (low 8 bits) */
-#define T1LH		(7*RS)		/* Timer 1 latch (high 8 bits) */
-#define ACR		(11*RS)		/* Auxiliary control register */
-#define IFR		(13*RS)		/* Interrupt flag register */
-
-/* Bits in ACR */
-#define T1MODE		0xc0		/* Timer 1 mode */
-#define T1MODE_CONT	0x40		/*  continuous interrupts */
-
-/* Bits in IFR and IER */
-#define T1_INT		0x40		/* Timer 1 interrupt */
-
-static int __init chrp_via_calibrate_decr(void)
-{
-	struct device_node *vias;
-	volatile unsigned char __iomem *via;
-	int count = VIA_TIMER_FREQ_6 / 100;
-	unsigned int dstart, dend;
-
-	vias = find_devices("via-cuda");
-	if (vias == 0)
-		vias = find_devices("via");
-	if (vias == 0 || vias->n_addrs == 0)
-		return 0;
-	via = ioremap(vias->addrs[0].address, vias->addrs[0].size);
-
-	/* set timer 1 for continuous interrupts */
-	out_8(&via[ACR], (via[ACR] & ~T1MODE) | T1MODE_CONT);
-	/* set the counter to a small value */
-	out_8(&via[T1CH], 2);
-	/* set the latch to `count' */
-	out_8(&via[T1LL], count);
-	out_8(&via[T1LH], count >> 8);
-	/* wait until it hits 0 */
-	while ((in_8(&via[IFR]) & T1_INT) == 0)
-		;
-	dstart = get_dec();
-	/* clear the interrupt & wait until it hits 0 again */
-	in_8(&via[T1CL]);
-	while ((in_8(&via[IFR]) & T1_INT) == 0)
-		;
-	dend = get_dec();
-
-	tb_ticks_per_jiffy = (dstart - dend) / ((6 * HZ)/100);
-	tb_to_us = mulhwu_scale_factor(dstart - dend, 60000);
-
-	printk(KERN_INFO "via_calibrate_decr: ticks per jiffy = %u (%u ticks)\n",
-	       tb_ticks_per_jiffy, dstart - dend);
-
-	iounmap(via);
-	
-	return 1;
-}
-
-void __init chrp_calibrate_decr(void)
-{
-	struct device_node *cpu;
-	unsigned int freq, *fp;
-
-	if (chrp_via_calibrate_decr())
-		return;
-
-	/*
-	 * The cpu node should have a timebase-frequency property
-	 * to tell us the rate at which the decrementer counts.
-	 */
-	freq = 16666000;		/* hardcoded default */
-	cpu = find_type_devices("cpu");
-	if (cpu != 0) {
-		fp = (unsigned int *)
-			get_property(cpu, "timebase-frequency", NULL);
-		if (fp != 0)
-			freq = *fp;
-	}
-	printk("time_init: decrementer frequency = %u.%.6u MHz\n",
- 	       freq/1000000, freq%1000000);
-	tb_ticks_per_jiffy = freq / HZ;
-	tb_to_us = mulhwu_scale_factor(freq, 1000000);
-}