summaryrefslogtreecommitdiff
path: root/arch/frv/kernel/process.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/frv/kernel/process.c')
-rw-r--r--arch/frv/kernel/process.c275
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,
- &current->thread.user->f,
- sizeof(current->thread.user->f));
- return 1;
-}