1 files changed, 0 insertions, 271 deletions
diff --git a/arch/ppc/kernel/temp.c b/arch/ppc/kernel/temp.c
deleted file mode 100644
index 26bd8ea35a4e..000000000000
--- a/arch/ppc/kernel/temp.c
+++ /dev/null
@@ -1,271 +0,0 @@
-/*
- * temp.c	Thermal management for cpu's with Thermal Assist Units
- *
- * Written by Troy Benjegerdes <hozer@drgw.net>
- *
- * TODO:
- * dynamic power management to limit peak CPU temp (using ICTC)
- * calibration???
- *
- * Silly, crazy ideas: use cpu load (from scheduler) and ICTC to extend battery
- * life in portables, and add a 'performance/watt' metric somewhere in /proc
- */
-
-#include <linux/config.h>
-#include <linux/errno.h>
-#include <linux/jiffies.h>
-#include <linux/kernel.h>
-#include <linux/param.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-
-#include <asm/io.h>
-#include <asm/reg.h>
-#include <asm/nvram.h>
-#include <asm/cache.h>
-#include <asm/8xx_immap.h>
-#include <asm/machdep.h>
-
-static struct tau_temp
-{
-	int interrupts;
-	unsigned char low;
-	unsigned char high;
-	unsigned char grew;
-} tau[NR_CPUS];
-
-struct timer_list tau_timer;
-
-#undef DEBUG
-
-/* TODO: put these in a /proc interface, with some sanity checks, and maybe
- * dynamic adjustment to minimize # of interrupts */
-/* configurable values for step size and how much to expand the window when
- * we get an interrupt. These are based on the limit that was out of range */
-#define step_size		2	/* step size when temp goes out of range */
-#define window_expand		1	/* expand the window by this much */
-/* configurable values for shrinking the window */
-#define shrink_timer	2*HZ	/* period between shrinking the window */
-#define min_window	2	/* minimum window size, degrees C */
-
-void set_thresholds(unsigned long cpu)
-{
-#ifdef CONFIG_TAU_INT
-	/*
-	 * setup THRM1,
-	 * threshold, valid bit, enable interrupts, interrupt when below threshold
-	 */
-	mtspr(SPRN_THRM1, THRM1_THRES(tau[cpu].low) | THRM1_V | THRM1_TIE | THRM1_TID);
-
-	/* setup THRM2,
-	 * threshold, valid bit, enable interrupts, interrupt when above threshhold
-	 */
-	mtspr (SPRN_THRM2, THRM1_THRES(tau[cpu].high) | THRM1_V | THRM1_TIE);
-#else
-	/* same thing but don't enable interrupts */
-	mtspr(SPRN_THRM1, THRM1_THRES(tau[cpu].low) | THRM1_V | THRM1_TID);
-	mtspr(SPRN_THRM2, THRM1_THRES(tau[cpu].high) | THRM1_V);
-#endif
-}
-
-void TAUupdate(int cpu)
-{
-	unsigned thrm;
-
-#ifdef DEBUG
-	printk("TAUupdate ");
-#endif
-
-	/* if both thresholds are crossed, the step_sizes cancel out
-	 * and the window winds up getting expanded twice. */
-	if((thrm = mfspr(SPRN_THRM1)) & THRM1_TIV){ /* is valid? */
-		if(thrm & THRM1_TIN){ /* crossed low threshold */
-			if (tau[cpu].low >= step_size){
-				tau[cpu].low -= step_size;
-				tau[cpu].high -= (step_size - window_expand);
-			}
-			tau[cpu].grew = 1;
-#ifdef DEBUG
-			printk("low threshold crossed ");
-#endif
-		}
-	}
-	if((thrm = mfspr(SPRN_THRM2)) & THRM1_TIV){ /* is valid? */
-		if(thrm & THRM1_TIN){ /* crossed high threshold */
-			if (tau[cpu].high <= 127-step_size){
-				tau[cpu].low += (step_size - window_expand);
-				tau[cpu].high += step_size;
-			}
-			tau[cpu].grew = 1;
-#ifdef DEBUG
-			printk("high threshold crossed ");
-#endif
-		}
-	}
-
-#ifdef DEBUG
-	printk("grew = %d\n", tau[cpu].grew);
-#endif
-
-#ifndef CONFIG_TAU_INT /* tau_timeout will do this if not using interrupts */
-	set_thresholds(cpu);
-#endif
-
-}
-
-#ifdef CONFIG_TAU_INT
-/*
- * TAU interrupts - called when we have a thermal assist unit interrupt
- * with interrupts disabled
- */
-
-void TAUException(struct pt_regs * regs)
-{
-	int cpu = smp_processor_id();
-
-	irq_enter();
-	tau[cpu].interrupts++;
-
-	TAUupdate(cpu);
-
-	irq_exit();
-}
-#endif /* CONFIG_TAU_INT */
-
-static void tau_timeout(void * info)
-{
-	int cpu;
-	unsigned long flags;
-	int size;
-	int shrink;
-
-	/* disabling interrupts *should* be okay */
-	local_irq_save(flags);
-	cpu = smp_processor_id();
-
-#ifndef CONFIG_TAU_INT
-	TAUupdate(cpu);
-#endif
-
-	size = tau[cpu].high - tau[cpu].low;
-	if (size > min_window && ! tau[cpu].grew) {
-		/* do an exponential shrink of half the amount currently over size */
-		shrink = (2 + size - min_window) / 4;
-		if (shrink) {
-			tau[cpu].low += shrink;
-			tau[cpu].high -= shrink;
-		} else { /* size must have been min_window + 1 */
-			tau[cpu].low += 1;
-#if 1 /* debug */
-			if ((tau[cpu].high - tau[cpu].low) != min_window){
-				printk(KERN_ERR "temp.c: line %d, logic error\n", __LINE__);
-			}
-#endif
-		}
-	}
-
-	tau[cpu].grew = 0;
-
-	set_thresholds(cpu);
-
-	/*
-	 * Do the enable every time, since otherwise a bunch of (relatively)
-	 * complex sleep code needs to be added. One mtspr every time
-	 * tau_timeout is called is probably not a big deal.
-	 *
-	 * Enable thermal sensor and set up sample interval timer
-	 * need 20 us to do the compare.. until a nice 'cpu_speed' function
-	 * call is implemented, just assume a 500 mhz clock. It doesn't really
-	 * matter if we take too long for a compare since it's all interrupt
-	 * driven anyway.
-	 *
-	 * use a extra long time.. (60 us @ 500 mhz)
-	 */
-	mtspr(SPRN_THRM3, THRM3_SITV(500*60) | THRM3_E);
-
-	local_irq_restore(flags);
-}
-
-static void tau_timeout_smp(unsigned long unused)
-{
-
-	/* schedule ourselves to be run again */
-	mod_timer(&tau_timer, jiffies + shrink_timer) ;
-	on_each_cpu(tau_timeout, NULL, 1, 0);
-}
-
-/*
- * setup the TAU
- *
- * Set things up to use THRM1 as a temperature lower bound, and THRM2 as an upper bound.
- * Start off at zero
- */
-
-int tau_initialized = 0;
-
-void __init TAU_init_smp(void * info)
-{
-	unsigned long cpu = smp_processor_id();
-
-	/* set these to a reasonable value and let the timer shrink the
-	 * window */
-	tau[cpu].low = 5;
-	tau[cpu].high = 120;
-
-	set_thresholds(cpu);
-}
-
-int __init TAU_init(void)
-{
-	/* We assume in SMP that if one CPU has TAU support, they
-	 * all have it --BenH
-	 */
-	if (!cpu_has_feature(CPU_FTR_TAU)) {
-		printk("Thermal assist unit not available\n");
-		tau_initialized = 0;
-		return 1;
-	}
-
-
-	/* first, set up the window shrinking timer */
-	init_timer(&tau_timer);
-	tau_timer.function = tau_timeout_smp;
-	tau_timer.expires = jiffies + shrink_timer;
-	add_timer(&tau_timer);
-
-	on_each_cpu(TAU_init_smp, NULL, 1, 0);
-
-	printk("Thermal assist unit ");
-#ifdef CONFIG_TAU_INT
-	printk("using interrupts, ");
-#else
-	printk("using timers, ");
-#endif
-	printk("shrink_timer: %d jiffies\n", shrink_timer);
-	tau_initialized = 1;
-
-	return 0;
-}
-
-__initcall(TAU_init);
-
-/*
- * return current temp
- */
-
-u32 cpu_temp_both(unsigned long cpu)
-{
-	return ((tau[cpu].high << 16) | tau[cpu].low);
-}
-
-int cpu_temp(unsigned long cpu)
-{
-	return ((tau[cpu].high + tau[cpu].low) / 2);
-}
-
-int tau_interrupts(unsigned long cpu)
-{
-	return (tau[cpu].interrupts);
-}