diff options
Diffstat (limited to 'arch/frv/kernel/process.c')
| -rw-r--r-- | arch/frv/kernel/process.c | 275 |
1 files changed, 0 insertions, 275 deletions
diff --git a/arch/frv/kernel/process.c b/arch/frv/kernel/process.c deleted file mode 100644 index a957b374e3a6..000000000000 --- a/arch/frv/kernel/process.c +++ /dev/null @@ -1,275 +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/sched/debug.h> -#include <linux/sched/task.h> -#include <linux/sched/task_stack.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 <linux/rcupdate.h> - -#include <asm/asm-offsets.h> -#include <linux/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); -asmlinkage void ret_from_kernel_thread(void); - -#include <asm/pgalloc.h> - -void (*pm_power_off)(void); -EXPORT_SYMBOL(pm_power_off); - -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 arch_cpu_idle(void) -{ - if (!frv_dma_inprogress) - core_sleep_idle(); - else - local_irq_enable(); -} - -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; -} - -/* - * set up the kernel stack and exception frames for a new process - */ -int copy_thread(unsigned long clone_flags, - unsigned long usp, unsigned long arg, - struct task_struct *p) -{ - struct pt_regs *childregs; - - childregs = (struct pt_regs *) - (task_stack_page(p) + THREAD_SIZE - FRV_FRAME0_SIZE); - - /* set up the userspace frame (the only place that the USP is stored) */ - *childregs = *current_pt_regs(); - - p->thread.frame = childregs; - p->thread.curr = p; - p->thread.sp = (unsigned long) childregs; - p->thread.fp = 0; - p->thread.lr = 0; - p->thread.frame0 = childregs; - - if (unlikely(p->flags & PF_KTHREAD)) { - childregs->gr9 = usp; /* function */ - childregs->gr8 = arg; - p->thread.pc = (unsigned long) ret_from_kernel_thread; - save_user_regs(p->thread.user); - return 0; - } - if (usp) - childregs->sp = usp; - childregs->next_frame = NULL; - - p->thread.pc = (unsigned long) ret_from_fork; - - /* 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() */ - -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; -} - -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; -} |