diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/frv/kernel/process.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/frv/kernel/process.c | 375 |
1 files changed, 0 insertions, 375 deletions
diff --git a/ANDROID_3.4.5/arch/frv/kernel/process.c b/ANDROID_3.4.5/arch/frv/kernel/process.c deleted file mode 100644 index d4de48bd..00000000 --- a/ANDROID_3.4.5/arch/frv/kernel/process.c +++ /dev/null @@ -1,375 +0,0 @@ -/* process.c: FRV specific parts of process handling - * - * Copyright (C) 2003-5 Red Hat, Inc. All Rights Reserved. - * Written by David Howells (dhowells@redhat.com) - * - Derived from arch/m68k/kernel/process.c - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - */ - -#include <linux/module.h> -#include <linux/errno.h> -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/smp.h> -#include <linux/stddef.h> -#include <linux/unistd.h> -#include <linux/ptrace.h> -#include <linux/slab.h> -#include <linux/user.h> -#include <linux/elf.h> -#include <linux/reboot.h> -#include <linux/interrupt.h> -#include <linux/pagemap.h> - -#include <asm/asm-offsets.h> -#include <asm/uaccess.h> -#include <asm/setup.h> -#include <asm/pgtable.h> -#include <asm/tlb.h> -#include <asm/gdb-stub.h> -#include <asm/mb-regs.h> - -#include "local.h" - -asmlinkage void ret_from_fork(void); - -#include <asm/pgalloc.h> - -void (*pm_power_off)(void); -EXPORT_SYMBOL(pm_power_off); - -struct task_struct *alloc_task_struct_node(int node) -{ - struct task_struct *p = kmalloc_node(THREAD_SIZE, GFP_KERNEL, node); - - if (p) - atomic_set((atomic_t *)(p+1), 1); - return p; -} - -void free_task_struct(struct task_struct *p) -{ - if (atomic_dec_and_test((atomic_t *)(p+1))) - kfree(p); -} - -static void core_sleep_idle(void) -{ -#ifdef LED_DEBUG_SLEEP - /* Show that we're sleeping... */ - __set_LEDS(0x55aa); -#endif - frv_cpu_core_sleep(); -#ifdef LED_DEBUG_SLEEP - /* ... and that we woke up */ - __set_LEDS(0); -#endif - mb(); -} - -void (*idle)(void) = core_sleep_idle; - -/* - * The idle thread. There's no useful work to be - * done, so just try to conserve power and have a - * low exit latency (ie sit in a loop waiting for - * somebody to say that they'd like to reschedule) - */ -void cpu_idle(void) -{ - /* endless idle loop with no priority at all */ - while (1) { - while (!need_resched()) { - check_pgt_cache(); - - if (!frv_dma_inprogress && idle) - idle(); - } - - schedule_preempt_disabled(); - } -} - -void machine_restart(char * __unused) -{ - unsigned long reset_addr; -#ifdef CONFIG_GDBSTUB - gdbstub_exit(0); -#endif - - if (PSR_IMPLE(__get_PSR()) == PSR_IMPLE_FR551) - reset_addr = 0xfefff500; - else - reset_addr = 0xfeff0500; - - /* Software reset. */ - asm volatile(" dcef @(gr0,gr0),1 ! membar !" - " sti %1,@(%0,0) !" - " nop ! nop ! nop ! nop ! nop ! " - " nop ! nop ! nop ! nop ! nop ! " - " nop ! nop ! nop ! nop ! nop ! " - " nop ! nop ! nop ! nop ! nop ! " - : : "r" (reset_addr), "r" (1) ); - - for (;;) - ; -} - -void machine_halt(void) -{ -#ifdef CONFIG_GDBSTUB - gdbstub_exit(0); -#endif - - for (;;); -} - -void machine_power_off(void) -{ -#ifdef CONFIG_GDBSTUB - gdbstub_exit(0); -#endif - - for (;;); -} - -void flush_thread(void) -{ - /* nothing */ -} - -inline unsigned long user_stack(const struct pt_regs *regs) -{ - while (regs->next_frame) - regs = regs->next_frame; - return user_mode(regs) ? regs->sp : 0; -} - -asmlinkage int sys_fork(void) -{ -#ifndef CONFIG_MMU - /* fork almost works, enough to trick you into looking elsewhere:-( */ - return -EINVAL; -#else - return do_fork(SIGCHLD, user_stack(__frame), __frame, 0, NULL, NULL); -#endif -} - -asmlinkage int sys_vfork(void) -{ - return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, user_stack(__frame), __frame, 0, - NULL, NULL); -} - -/*****************************************************************************/ -/* - * clone a process - * - tlsptr is retrieved by copy_thread() - */ -asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp, - int __user *parent_tidptr, int __user *child_tidptr, - int __user *tlsptr) -{ - if (!newsp) - newsp = user_stack(__frame); - return do_fork(clone_flags, newsp, __frame, 0, parent_tidptr, child_tidptr); -} /* end sys_clone() */ - -/*****************************************************************************/ -/* - * This gets called before we allocate a new thread and copy - * the current task into it. - */ -void prepare_to_copy(struct task_struct *tsk) -{ - //unlazy_fpu(tsk); -} /* end prepare_to_copy() */ - -/*****************************************************************************/ -/* - * set up the kernel stack and exception frames for a new process - */ -int copy_thread(unsigned long clone_flags, - unsigned long usp, unsigned long topstk, - struct task_struct *p, struct pt_regs *regs) -{ - struct pt_regs *childregs0, *childregs, *regs0; - - regs0 = __kernel_frame0_ptr; - childregs0 = (struct pt_regs *) - (task_stack_page(p) + THREAD_SIZE - FRV_FRAME0_SIZE); - childregs = childregs0; - - /* set up the userspace frame (the only place that the USP is stored) */ - *childregs0 = *regs0; - - childregs0->gr8 = 0; - childregs0->sp = usp; - childregs0->next_frame = NULL; - - /* set up the return kernel frame if called from kernel_thread() */ - if (regs != regs0) { - childregs--; - *childregs = *regs; - childregs->sp = (unsigned long) childregs0; - childregs->next_frame = childregs0; - childregs->gr15 = (unsigned long) task_thread_info(p); - childregs->gr29 = (unsigned long) p; - } - - p->set_child_tid = p->clear_child_tid = NULL; - - p->thread.frame = childregs; - p->thread.curr = p; - p->thread.sp = (unsigned long) childregs; - p->thread.fp = 0; - p->thread.lr = 0; - p->thread.pc = (unsigned long) ret_from_fork; - p->thread.frame0 = childregs0; - - /* the new TLS pointer is passed in as arg #5 to sys_clone() */ - if (clone_flags & CLONE_SETTLS) - childregs->gr29 = childregs->gr12; - - save_user_regs(p->thread.user); - - return 0; -} /* end copy_thread() */ - -/* - * sys_execve() executes a new program. - */ -asmlinkage int sys_execve(const char __user *name, - const char __user *const __user *argv, - const char __user *const __user *envp) -{ - int error; - char * filename; - - filename = getname(name); - error = PTR_ERR(filename); - if (IS_ERR(filename)) - return error; - error = do_execve(filename, argv, envp, __frame); - putname(filename); - return error; -} - -unsigned long get_wchan(struct task_struct *p) -{ - struct pt_regs *regs0; - unsigned long fp, pc; - unsigned long stack_limit; - int count = 0; - if (!p || p == current || p->state == TASK_RUNNING) - return 0; - - stack_limit = (unsigned long) (p + 1); - fp = p->thread.fp; - regs0 = p->thread.frame0; - - do { - if (fp < stack_limit || fp >= (unsigned long) regs0 || fp & 3) - return 0; - - pc = ((unsigned long *) fp)[2]; - - /* FIXME: This depends on the order of these functions. */ - if (!in_sched_functions(pc)) - return pc; - - fp = *(unsigned long *) fp; - } while (count++ < 16); - - return 0; -} - -unsigned long thread_saved_pc(struct task_struct *tsk) -{ - /* Check whether the thread is blocked in resume() */ - if (in_sched_functions(tsk->thread.pc)) - return ((unsigned long *)tsk->thread.fp)[2]; - else - return tsk->thread.pc; -} - -int elf_check_arch(const struct elf32_hdr *hdr) -{ - unsigned long hsr0 = __get_HSR(0); - unsigned long psr = __get_PSR(); - - if (hdr->e_machine != EM_FRV) - return 0; - - switch (hdr->e_flags & EF_FRV_GPR_MASK) { - case EF_FRV_GPR64: - if ((hsr0 & HSR0_GRN) == HSR0_GRN_32) - return 0; - case EF_FRV_GPR32: - case 0: - break; - default: - return 0; - } - - switch (hdr->e_flags & EF_FRV_FPR_MASK) { - case EF_FRV_FPR64: - if ((hsr0 & HSR0_FRN) == HSR0_FRN_32) - return 0; - case EF_FRV_FPR32: - case EF_FRV_FPR_NONE: - case 0: - break; - default: - return 0; - } - - if ((hdr->e_flags & EF_FRV_MULADD) == EF_FRV_MULADD) - if (PSR_IMPLE(psr) != PSR_IMPLE_FR405 && - PSR_IMPLE(psr) != PSR_IMPLE_FR451) - return 0; - - switch (hdr->e_flags & EF_FRV_CPU_MASK) { - case EF_FRV_CPU_GENERIC: - break; - case EF_FRV_CPU_FR300: - case EF_FRV_CPU_SIMPLE: - case EF_FRV_CPU_TOMCAT: - default: - return 0; - case EF_FRV_CPU_FR400: - if (PSR_IMPLE(psr) != PSR_IMPLE_FR401 && - PSR_IMPLE(psr) != PSR_IMPLE_FR405 && - PSR_IMPLE(psr) != PSR_IMPLE_FR451 && - PSR_IMPLE(psr) != PSR_IMPLE_FR551) - return 0; - break; - case EF_FRV_CPU_FR450: - if (PSR_IMPLE(psr) != PSR_IMPLE_FR451) - return 0; - break; - case EF_FRV_CPU_FR500: - if (PSR_IMPLE(psr) != PSR_IMPLE_FR501) - return 0; - break; - case EF_FRV_CPU_FR550: - if (PSR_IMPLE(psr) != PSR_IMPLE_FR551) - return 0; - break; - } - - return 1; -} - -int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpregs) -{ - memcpy(fpregs, - ¤t->thread.user->f, - sizeof(current->thread.user->f)); - return 1; -} |