1 files changed, 0 insertions, 178 deletions
diff --git a/ANDROID_3.4.5/arch/arm/kernel/xscale-cp0.c b/ANDROID_3.4.5/arch/arm/kernel/xscale-cp0.c
deleted file mode 100644
index e42adc6b..00000000
--- a/ANDROID_3.4.5/arch/arm/kernel/xscale-cp0.c
+++ /dev/null
@@ -1,178 +0,0 @@
-/*
- * linux/arch/arm/kernel/xscale-cp0.c
- *
- * XScale DSP and iWMMXt coprocessor context switching and handling
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <asm/thread_notify.h>
-
-static inline void dsp_save_state(u32 *state)
-{
-	__asm__ __volatile__ (
-		"mrrc	p0, 0, %0, %1, c0\n"
-		: "=r" (state[0]), "=r" (state[1]));
-}
-
-static inline void dsp_load_state(u32 *state)
-{
-	__asm__ __volatile__ (
-		"mcrr	p0, 0, %0, %1, c0\n"
-		: : "r" (state[0]), "r" (state[1]));
-}
-
-static int dsp_do(struct notifier_block *self, unsigned long cmd, void *t)
-{
-	struct thread_info *thread = t;
-
-	switch (cmd) {
-	case THREAD_NOTIFY_FLUSH:
-		thread->cpu_context.extra[0] = 0;
-		thread->cpu_context.extra[1] = 0;
-		break;
-
-	case THREAD_NOTIFY_SWITCH:
-		dsp_save_state(current_thread_info()->cpu_context.extra);
-		dsp_load_state(thread->cpu_context.extra);
-		break;
-	}
-
-	return NOTIFY_DONE;
-}
-
-static struct notifier_block dsp_notifier_block = {
-	.notifier_call	= dsp_do,
-};
-
-
-#ifdef CONFIG_IWMMXT
-static int iwmmxt_do(struct notifier_block *self, unsigned long cmd, void *t)
-{
-	struct thread_info *thread = t;
-
-	switch (cmd) {
-	case THREAD_NOTIFY_FLUSH:
-		/*
-		 * flush_thread() zeroes thread->fpstate, so no need
-		 * to do anything here.
-		 *
-		 * FALLTHROUGH: Ensure we don't try to overwrite our newly
-		 * initialised state information on the first fault.
-		 */
-
-	case THREAD_NOTIFY_EXIT:
-		iwmmxt_task_release(thread);
-		break;
-
-	case THREAD_NOTIFY_SWITCH:
-		iwmmxt_task_switch(thread);
-		break;
-	}
-
-	return NOTIFY_DONE;
-}
-
-static struct notifier_block iwmmxt_notifier_block = {
-	.notifier_call	= iwmmxt_do,
-};
-#endif
-
-
-static u32 __init xscale_cp_access_read(void)
-{
-	u32 value;
-
-	__asm__ __volatile__ (
-		"mrc	p15, 0, %0, c15, c1, 0\n\t"
-		: "=r" (value));
-
-	return value;
-}
-
-static void __init xscale_cp_access_write(u32 value)
-{
-	u32 temp;
-
-	__asm__ __volatile__ (
-		"mcr	p15, 0, %1, c15, c1, 0\n\t"
-		"mrc	p15, 0, %0, c15, c1, 0\n\t"
-		"mov	%0, %0\n\t"
-		"sub	pc, pc, #4\n\t"
-		: "=r" (temp) : "r" (value));
-}
-
-/*
- * Detect whether we have a MAC coprocessor (40 bit register) or an
- * iWMMXt coprocessor (64 bit registers) by loading 00000100:00000000
- * into a coprocessor register and reading it back, and checking
- * whether the upper word survived intact.
- */
-static int __init cpu_has_iwmmxt(void)
-{
-	u32 lo;
-	u32 hi;
-
-	/*
-	 * This sequence is interpreted by the DSP coprocessor as:
-	 *	mar	acc0, %2, %3
-	 *	mra	%0, %1, acc0
-	 *
-	 * And by the iWMMXt coprocessor as:
-	 *	tmcrr	wR0, %2, %3
-	 *	tmrrc	%0, %1, wR0
-	 */
-	__asm__ __volatile__ (
-		"mcrr	p0, 0, %2, %3, c0\n"
-		"mrrc	p0, 0, %0, %1, c0\n"
-		: "=r" (lo), "=r" (hi)
-		: "r" (0), "r" (0x100));
-
-	return !!hi;
-}
-
-
-/*
- * If we detect that the CPU has iWMMXt (and CONFIG_IWMMXT=y), we
- * disable CP0/CP1 on boot, and let call_fpe() and the iWMMXt lazy
- * switch code handle iWMMXt context switching.  If on the other
- * hand the CPU has a DSP coprocessor, we keep access to CP0 enabled
- * all the time, and save/restore acc0 on context switch in non-lazy
- * fashion.
- */
-static int __init xscale_cp0_init(void)
-{
-	u32 cp_access;
-
-	cp_access = xscale_cp_access_read() & ~3;
-	xscale_cp_access_write(cp_access | 1);
-
-	if (cpu_has_iwmmxt()) {
-#ifndef CONFIG_IWMMXT
-		printk(KERN_WARNING "CAUTION: XScale iWMMXt coprocessor "
-			"detected, but kernel support is missing.\n");
-#else
-		printk(KERN_INFO "XScale iWMMXt coprocessor detected.\n");
-		elf_hwcap |= HWCAP_IWMMXT;
-		thread_register_notifier(&iwmmxt_notifier_block);
-#endif
-	} else {
-		printk(KERN_INFO "XScale DSP coprocessor detected.\n");
-		thread_register_notifier(&dsp_notifier_block);
-		cp_access |= 1;
-	}
-
-	xscale_cp_access_write(cp_access);
-
-	return 0;
-}
-
-late_initcall(xscale_cp0_init);