diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/microblaze/kernel/process.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/microblaze/kernel/process.c | 257 |
1 files changed, 0 insertions, 257 deletions
diff --git a/ANDROID_3.4.5/arch/microblaze/kernel/process.c b/ANDROID_3.4.5/arch/microblaze/kernel/process.c deleted file mode 100644 index 883b9278..00000000 --- a/ANDROID_3.4.5/arch/microblaze/kernel/process.c +++ /dev/null @@ -1,257 +0,0 @@ -/* - * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> - * Copyright (C) 2008-2009 PetaLogix - * Copyright (C) 2006 Atmark Techno, Inc. - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ - -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/pm.h> -#include <linux/tick.h> -#include <linux/bitops.h> -#include <asm/pgalloc.h> -#include <asm/uaccess.h> /* for USER_DS macros */ -#include <asm/cacheflush.h> - -void show_regs(struct pt_regs *regs) -{ - printk(KERN_INFO " Registers dump: mode=%X\r\n", regs->pt_mode); - printk(KERN_INFO " r1=%08lX, r2=%08lX, r3=%08lX, r4=%08lX\n", - regs->r1, regs->r2, regs->r3, regs->r4); - printk(KERN_INFO " r5=%08lX, r6=%08lX, r7=%08lX, r8=%08lX\n", - regs->r5, regs->r6, regs->r7, regs->r8); - printk(KERN_INFO " r9=%08lX, r10=%08lX, r11=%08lX, r12=%08lX\n", - regs->r9, regs->r10, regs->r11, regs->r12); - printk(KERN_INFO " r13=%08lX, r14=%08lX, r15=%08lX, r16=%08lX\n", - regs->r13, regs->r14, regs->r15, regs->r16); - printk(KERN_INFO " r17=%08lX, r18=%08lX, r19=%08lX, r20=%08lX\n", - regs->r17, regs->r18, regs->r19, regs->r20); - printk(KERN_INFO " r21=%08lX, r22=%08lX, r23=%08lX, r24=%08lX\n", - regs->r21, regs->r22, regs->r23, regs->r24); - printk(KERN_INFO " r25=%08lX, r26=%08lX, r27=%08lX, r28=%08lX\n", - regs->r25, regs->r26, regs->r27, regs->r28); - printk(KERN_INFO " r29=%08lX, r30=%08lX, r31=%08lX, rPC=%08lX\n", - regs->r29, regs->r30, regs->r31, regs->pc); - printk(KERN_INFO " msr=%08lX, ear=%08lX, esr=%08lX, fsr=%08lX\n", - regs->msr, regs->ear, regs->esr, regs->fsr); -} - -void (*pm_idle)(void); -void (*pm_power_off)(void) = NULL; -EXPORT_SYMBOL(pm_power_off); - -static int hlt_counter = 1; - -void disable_hlt(void) -{ - hlt_counter++; -} -EXPORT_SYMBOL(disable_hlt); - -void enable_hlt(void) -{ - hlt_counter--; -} -EXPORT_SYMBOL(enable_hlt); - -static int __init nohlt_setup(char *__unused) -{ - hlt_counter = 1; - return 1; -} -__setup("nohlt", nohlt_setup); - -static int __init hlt_setup(char *__unused) -{ - hlt_counter = 0; - return 1; -} -__setup("hlt", hlt_setup); - -void default_idle(void) -{ - if (likely(hlt_counter)) { - local_irq_disable(); - stop_critical_timings(); - cpu_relax(); - start_critical_timings(); - local_irq_enable(); - } else { - clear_thread_flag(TIF_POLLING_NRFLAG); - smp_mb__after_clear_bit(); - local_irq_disable(); - while (!need_resched()) - cpu_sleep(); - local_irq_enable(); - set_thread_flag(TIF_POLLING_NRFLAG); - } -} - -void cpu_idle(void) -{ - set_thread_flag(TIF_POLLING_NRFLAG); - - /* endless idle loop with no priority at all */ - while (1) { - void (*idle)(void) = pm_idle; - - if (!idle) - idle = default_idle; - - tick_nohz_idle_enter(); - rcu_idle_enter(); - while (!need_resched()) - idle(); - rcu_idle_exit(); - tick_nohz_idle_exit(); - - schedule_preempt_disabled(); - check_pgt_cache(); - } -} - -void flush_thread(void) -{ -} - -int copy_thread(unsigned long clone_flags, unsigned long usp, - unsigned long unused, - struct task_struct *p, struct pt_regs *regs) -{ - struct pt_regs *childregs = task_pt_regs(p); - struct thread_info *ti = task_thread_info(p); - - *childregs = *regs; - if (user_mode(regs)) - childregs->r1 = usp; - else - childregs->r1 = ((unsigned long) ti) + THREAD_SIZE; - -#ifndef CONFIG_MMU - memset(&ti->cpu_context, 0, sizeof(struct cpu_context)); - ti->cpu_context.r1 = (unsigned long)childregs; - ti->cpu_context.msr = (unsigned long)childregs->msr; -#else - - /* if creating a kernel thread then update the current reg (we don't - * want to use the parent's value when restoring by POP_STATE) */ - if (kernel_mode(regs)) - /* save new current on stack to use POP_STATE */ - childregs->CURRENT_TASK = (unsigned long)p; - /* if returning to user then use the parent's value of this register */ - - /* if we're creating a new kernel thread then just zeroing all - * the registers. That's OK for a brand new thread.*/ - /* Pls. note that some of them will be restored in POP_STATE */ - if (kernel_mode(regs)) - memset(&ti->cpu_context, 0, sizeof(struct cpu_context)); - /* if this thread is created for fork/vfork/clone, then we want to - * restore all the parent's context */ - /* in addition to the registers which will be restored by POP_STATE */ - else { - ti->cpu_context = *(struct cpu_context *)regs; - childregs->msr |= MSR_UMS; - } - - /* FIXME STATE_SAVE_PT_OFFSET; */ - ti->cpu_context.r1 = (unsigned long)childregs; - /* we should consider the fact that childregs is a copy of the parent - * regs which were saved immediately after entering the kernel state - * before enabling VM. This MSR will be restored in switch_to and - * RETURN() and we want to have the right machine state there - * specifically this state must have INTs disabled before and enabled - * after performing rtbd - * compose the right MSR for RETURN(). It will work for switch_to also - * excepting for VM and UMS - * don't touch UMS , CARRY and cache bits - * right now MSR is a copy of parent one */ - childregs->msr |= MSR_BIP; - childregs->msr &= ~MSR_EIP; - childregs->msr |= MSR_IE; - childregs->msr &= ~MSR_VM; - childregs->msr |= MSR_VMS; - childregs->msr |= MSR_EE; /* exceptions will be enabled*/ - - ti->cpu_context.msr = (childregs->msr|MSR_VM); - ti->cpu_context.msr &= ~MSR_UMS; /* switch_to to kernel mode */ - ti->cpu_context.msr &= ~MSR_IE; -#endif - ti->cpu_context.r15 = (unsigned long)ret_from_fork - 8; - - if (clone_flags & CLONE_SETTLS) - ; - - return 0; -} - -#ifndef CONFIG_MMU -/* - * Return saved PC of a blocked thread. - */ -unsigned long thread_saved_pc(struct task_struct *tsk) -{ - struct cpu_context *ctx = - &(((struct thread_info *)(tsk->stack))->cpu_context); - - /* Check whether the thread is blocked in resume() */ - if (in_sched_functions(ctx->r15)) - return (unsigned long)ctx->r15; - else - return ctx->r14; -} -#endif - -static void kernel_thread_helper(int (*fn)(void *), void *arg) -{ - fn(arg); - do_exit(-1); -} - -int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags) -{ - struct pt_regs regs; - - memset(®s, 0, sizeof(regs)); - /* store them in non-volatile registers */ - regs.r5 = (unsigned long)fn; - regs.r6 = (unsigned long)arg; - local_save_flags(regs.msr); - regs.pc = (unsigned long)kernel_thread_helper; - regs.pt_mode = 1; - - return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, - ®s, 0, NULL, NULL); -} -EXPORT_SYMBOL_GPL(kernel_thread); - -unsigned long get_wchan(struct task_struct *p) -{ -/* TBD (used by procfs) */ - return 0; -} - -/* Set up a thread for executing a new program */ -void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp) -{ - regs->pc = pc; - regs->r1 = usp; - regs->pt_mode = 0; -#ifdef CONFIG_MMU - regs->msr |= MSR_UMS; -#endif -} - -#ifdef CONFIG_MMU -#include <linux/elfcore.h> -/* - * Set up a thread for executing a new program - */ -int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpregs) -{ - return 0; /* MicroBlaze has no separate FPU registers */ -} -#endif /* CONFIG_MMU */ |