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Diffstat (limited to 'ANDROID_3.4.5/arch/arm/kernel/pj4-cp0.c')
-rw-r--r--ANDROID_3.4.5/arch/arm/kernel/pj4-cp0.c93
1 files changed, 0 insertions, 93 deletions
diff --git a/ANDROID_3.4.5/arch/arm/kernel/pj4-cp0.c b/ANDROID_3.4.5/arch/arm/kernel/pj4-cp0.c
deleted file mode 100644
index 679cf4d1..00000000
--- a/ANDROID_3.4.5/arch/arm/kernel/pj4-cp0.c
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * linux/arch/arm/kernel/pj4-cp0.c
- *
- * PJ4 iWMMXt coprocessor context switching and handling
- *
- * Copyright (c) 2010 Marvell International Inc.
- *
- * 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 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,
-};
-
-
-static u32 __init pj4_cp_access_read(void)
-{
- u32 value;
-
- __asm__ __volatile__ (
- "mrc p15, 0, %0, c1, c0, 2\n\t"
- : "=r" (value));
- return value;
-}
-
-static void __init pj4_cp_access_write(u32 value)
-{
- u32 temp;
-
- __asm__ __volatile__ (
- "mcr p15, 0, %1, c1, c0, 2\n\t"
- "mrc p15, 0, %0, c1, c0, 2\n\t"
- "mov %0, %0\n\t"
- "sub pc, pc, #4\n\t"
- : "=r" (temp) : "r" (value));
-}
-
-
-/*
- * Disable CP0/CP1 on boot, and let call_fpe() and the iWMMXt lazy
- * switch code handle iWMMXt context switching.
- */
-static int __init pj4_cp0_init(void)
-{
- u32 cp_access;
-
- cp_access = pj4_cp_access_read() & ~0xf;
- pj4_cp_access_write(cp_access);
-
- printk(KERN_INFO "PJ4 iWMMXt coprocessor enabled.\n");
- elf_hwcap |= HWCAP_IWMMXT;
- thread_register_notifier(&iwmmxt_notifier_block);
-
- return 0;
-}
-
-late_initcall(pj4_cp0_init);