[PATCH] Time: i386 Conversion - part 4: Remove Old timer_opts Code

Remove the old timers/timer_opts infrastructure which has been disabled.  It
is a fairly straightforward set of deletions

Note that this does not provide any i386 clocksources, so you will only have
the jiffies clocksource.  To get full replacements for the code being removed
here, the timeofday-clocks-i386 patch will be needed.

Signed-off-by: John Stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 0 insertions, 259 deletions

diff --git a/arch/i386/kernel/timers/timer_cyclone.c b/arch/i386/kernel/timers/timer_cyclone.c
deleted file mode 100644
index 13892a65c941b..0000000000000
--- a/arch/i386/kernel/timers/timer_cyclone.c
+++ /dev/null
@@ -1,259 +0,0 @@
-/*	Cyclone-timer: 
- *		This code implements timer_ops for the cyclone counter found
- *		on IBM x440, x360, and other Summit based systems.
- *
- *	Copyright (C) 2002 IBM, John Stultz (johnstul@us.ibm.com)
- */
-
-
-#include <linux/spinlock.h>
-#include <linux/init.h>
-#include <linux/timex.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/jiffies.h>
-
-#include <asm/timer.h>
-#include <asm/io.h>
-#include <asm/pgtable.h>
-#include <asm/fixmap.h>
-#include <asm/i8253.h>
-
-#include "io_ports.h"
-
-/* Number of usecs that the last interrupt was delayed */
-static int delay_at_last_interrupt;
-
-#define CYCLONE_CBAR_ADDR 0xFEB00CD0
-#define CYCLONE_PMCC_OFFSET 0x51A0
-#define CYCLONE_MPMC_OFFSET 0x51D0
-#define CYCLONE_MPCS_OFFSET 0x51A8
-#define CYCLONE_TIMER_FREQ 100000000
-#define CYCLONE_TIMER_MASK (((u64)1<<40)-1) /* 40 bit mask */
-int use_cyclone = 0;
-
-static u32* volatile cyclone_timer;	/* Cyclone MPMC0 register */
-static u32 last_cyclone_low;
-static u32 last_cyclone_high;
-static unsigned long long monotonic_base;
-static seqlock_t monotonic_lock = SEQLOCK_UNLOCKED;
-
-/* helper macro to atomically read both cyclone counter registers */
-#define read_cyclone_counter(low,high) \
-	do{ \
-		high = cyclone_timer[1]; low = cyclone_timer[0]; \
-	} while (high != cyclone_timer[1]);
-
-
-static void mark_offset_cyclone(void)
-{
-	unsigned long lost, delay;
-	unsigned long delta = last_cyclone_low;
-	int count;
-	unsigned long long this_offset, last_offset;
-
-	write_seqlock(&monotonic_lock);
-	last_offset = ((unsigned long long)last_cyclone_high<<32)|last_cyclone_low;
-	
-	spin_lock(&i8253_lock);
-	read_cyclone_counter(last_cyclone_low,last_cyclone_high);
-
-	/* read values for delay_at_last_interrupt */
-	outb_p(0x00, 0x43);     /* latch the count ASAP */
-
-	count = inb_p(0x40);    /* read the latched count */
-	count |= inb(0x40) << 8;
-
-	/*
-	 * VIA686a test code... reset the latch if count > max + 1
-	 * from timer_pit.c - cjb
-	 */
-	if (count > LATCH) {
-		outb_p(0x34, PIT_MODE);
-		outb_p(LATCH & 0xff, PIT_CH0);
-		outb(LATCH >> 8, PIT_CH0);
-		count = LATCH - 1;
-	}
-	spin_unlock(&i8253_lock);
-
-	/* lost tick compensation */
-	delta = last_cyclone_low - delta;	
-	delta /= (CYCLONE_TIMER_FREQ/1000000);
-	delta += delay_at_last_interrupt;
-	lost = delta/(1000000/HZ);
-	delay = delta%(1000000/HZ);
-	if (lost >= 2)
-		jiffies_64 += lost-1;
-	
-	/* update the monotonic base value */
-	this_offset = ((unsigned long long)last_cyclone_high<<32)|last_cyclone_low;
-	monotonic_base += (this_offset - last_offset) & CYCLONE_TIMER_MASK;
-	write_sequnlock(&monotonic_lock);
-
-	/* calculate delay_at_last_interrupt */
-	count = ((LATCH-1) - count) * TICK_SIZE;
-	delay_at_last_interrupt = (count + LATCH/2) / LATCH;
-
-
-	/* catch corner case where tick rollover occured 
-	 * between cyclone and pit reads (as noted when 
-	 * usec delta is > 90% # of usecs/tick)
-	 */
-	if (lost && abs(delay - delay_at_last_interrupt) > (900000/HZ))
-		jiffies_64++;
-}
-
-static unsigned long get_offset_cyclone(void)
-{
-	u32 offset;
-
-	if(!cyclone_timer)
-		return delay_at_last_interrupt;
-
-	/* Read the cyclone timer */
-	offset = cyclone_timer[0];
-
-	/* .. relative to previous jiffy */
-	offset = offset - last_cyclone_low;
-
-	/* convert cyclone ticks to microseconds */	
-	/* XXX slow, can we speed this up? */
-	offset = offset/(CYCLONE_TIMER_FREQ/1000000);
-
-	/* our adjusted time offset in microseconds */
-	return delay_at_last_interrupt + offset;
-}
-
-static unsigned long long monotonic_clock_cyclone(void)
-{
-	u32 now_low, now_high;
-	unsigned long long last_offset, this_offset, base;
-	unsigned long long ret;
-	unsigned seq;
-
-	/* atomically read monotonic base & last_offset */
-	do {
-		seq = read_seqbegin(&monotonic_lock);
-		last_offset = ((unsigned long long)last_cyclone_high<<32)|last_cyclone_low;
-		base = monotonic_base;
-	} while (read_seqretry(&monotonic_lock, seq));
-
-
-	/* Read the cyclone counter */
-	read_cyclone_counter(now_low,now_high);
-	this_offset = ((unsigned long long)now_high<<32)|now_low;
-
-	/* convert to nanoseconds */
-	ret = base + ((this_offset - last_offset)&CYCLONE_TIMER_MASK);
-	return ret * (1000000000 / CYCLONE_TIMER_FREQ);
-}
-
-static int __init init_cyclone(char* override)
-{
-	u32* reg;	
-	u32 base;		/* saved cyclone base address */
-	u32 pageaddr;	/* page that contains cyclone_timer register */
-	u32 offset;		/* offset from pageaddr to cyclone_timer register */
-	int i;
-	
-	/* check clock override */
-	if (override[0] && strncmp(override,"cyclone",7))
-			return -ENODEV;
-
-	/*make sure we're on a summit box*/
-	if(!use_cyclone) return -ENODEV; 
-	
-	printk(KERN_INFO "Summit chipset: Starting Cyclone Counter.\n");
-
-	/* find base address */
-	pageaddr = (CYCLONE_CBAR_ADDR)&PAGE_MASK;
-	offset = (CYCLONE_CBAR_ADDR)&(~PAGE_MASK);
-	set_fixmap_nocache(FIX_CYCLONE_TIMER, pageaddr);
-	reg = (u32*)(fix_to_virt(FIX_CYCLONE_TIMER) + offset);
-	if(!reg){
-		printk(KERN_ERR "Summit chipset: Could not find valid CBAR register.\n");
-		return -ENODEV;
-	}
-	base = *reg;	
-	if(!base){
-		printk(KERN_ERR "Summit chipset: Could not find valid CBAR value.\n");
-		return -ENODEV;
-	}
-	
-	/* setup PMCC */
-	pageaddr = (base + CYCLONE_PMCC_OFFSET)&PAGE_MASK;
-	offset = (base + CYCLONE_PMCC_OFFSET)&(~PAGE_MASK);
-	set_fixmap_nocache(FIX_CYCLONE_TIMER, pageaddr);
-	reg = (u32*)(fix_to_virt(FIX_CYCLONE_TIMER) + offset);
-	if(!reg){
-		printk(KERN_ERR "Summit chipset: Could not find valid PMCC register.\n");
-		return -ENODEV;
-	}
-	reg[0] = 0x00000001;
-
-	/* setup MPCS */
-	pageaddr = (base + CYCLONE_MPCS_OFFSET)&PAGE_MASK;
-	offset = (base + CYCLONE_MPCS_OFFSET)&(~PAGE_MASK);
-	set_fixmap_nocache(FIX_CYCLONE_TIMER, pageaddr);
-	reg = (u32*)(fix_to_virt(FIX_CYCLONE_TIMER) + offset);
-	if(!reg){
-		printk(KERN_ERR "Summit chipset: Could not find valid MPCS register.\n");
-		return -ENODEV;
-	}
-	reg[0] = 0x00000001;
-
-	/* map in cyclone_timer */
-	pageaddr = (base + CYCLONE_MPMC_OFFSET)&PAGE_MASK;
-	offset = (base + CYCLONE_MPMC_OFFSET)&(~PAGE_MASK);
-	set_fixmap_nocache(FIX_CYCLONE_TIMER, pageaddr);
-	cyclone_timer = (u32*)(fix_to_virt(FIX_CYCLONE_TIMER) + offset);
-	if(!cyclone_timer){
-		printk(KERN_ERR "Summit chipset: Could not find valid MPMC register.\n");
-		return -ENODEV;
-	}
-
-	/*quick test to make sure its ticking*/
-	for(i=0; i<3; i++){
-		u32 old = cyclone_timer[0];
-		int stall = 100;
-		while(stall--) barrier();
-		if(cyclone_timer[0] == old){
-			printk(KERN_ERR "Summit chipset: Counter not counting! DISABLED\n");
-			cyclone_timer = 0;
-			return -ENODEV;
-		}
-	}
-
-	init_cpu_khz();
-
-	/* Everything looks good! */
-	return 0;
-}
-
-
-static void delay_cyclone(unsigned long loops)
-{
-	unsigned long bclock, now;
-	if(!cyclone_timer)
-		return;
-	bclock = cyclone_timer[0];
-	do {
-		rep_nop();
-		now = cyclone_timer[0];
-	} while ((now-bclock) < loops);
-}
-/************************************************************/
-
-/* cyclone timer_opts struct */
-static struct timer_opts timer_cyclone = {
-	.name = "cyclone",
-	.mark_offset = mark_offset_cyclone, 
-	.get_offset = get_offset_cyclone,
-	.monotonic_clock =	monotonic_clock_cyclone,
-	.delay = delay_cyclone,
-};
-
-struct init_timer_opts __initdata timer_cyclone_init = {
-	.init = init_cyclone,
-	.opts = &timer_cyclone,
-};