diff options
Diffstat (limited to 'arch/m32r/kernel/process.c')
| -rw-r--r-- | arch/m32r/kernel/process.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/arch/m32r/kernel/process.c b/arch/m32r/kernel/process.c new file mode 100644 index 000000000..e69221d58 --- /dev/null +++ b/arch/m32r/kernel/process.c @@ -0,0 +1,167 @@ +/* + * linux/arch/m32r/kernel/process.c + * + * Copyright (c) 2001, 2002 Hiroyuki Kondo, Hirokazu Takata, + * Hitoshi Yamamoto + * Taken from sh version. + * Copyright (C) 1995 Linus Torvalds + * SuperH version: Copyright (C) 1999, 2000 Niibe Yutaka & Kaz Kojima + */ + +#undef DEBUG_PROCESS +#ifdef DEBUG_PROCESS +#define DPRINTK(fmt, args...) printk("%s:%d:%s: " fmt, __FILE__, __LINE__, \ + __func__, ##args) +#else +#define DPRINTK(fmt, args...) +#endif + +/* + * This file handles the architecture-dependent parts of process handling.. + */ + +#include <linux/fs.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/ptrace.h> +#include <linux/unistd.h> +#include <linux/hardirq.h> +#include <linux/rcupdate.h> + +#include <asm/io.h> +#include <asm/uaccess.h> +#include <asm/mmu_context.h> +#include <asm/elf.h> +#include <asm/m32r.h> + +#include <linux/err.h> + +/* + * Return saved PC of a blocked thread. + */ +unsigned long thread_saved_pc(struct task_struct *tsk) +{ + return tsk->thread.lr; +} + +void (*pm_power_off)(void) = NULL; +EXPORT_SYMBOL(pm_power_off); + +void machine_restart(char *__unused) +{ +#if defined(CONFIG_PLAT_MAPPI3) + outw(1, (unsigned long)PLD_REBOOT); +#endif + + printk("Please push reset button!\n"); + while (1) + cpu_relax(); +} + +void machine_halt(void) +{ + printk("Please push reset button!\n"); + while (1) + cpu_relax(); +} + +void machine_power_off(void) +{ + /* M32R_FIXME */ +} + +void show_regs(struct pt_regs * regs) +{ + printk("\n"); + show_regs_print_info(KERN_DEFAULT); + + printk("BPC[%08lx]:PSW[%08lx]:LR [%08lx]:FP [%08lx]\n", \ + regs->bpc, regs->psw, regs->lr, regs->fp); + printk("BBPC[%08lx]:BBPSW[%08lx]:SPU[%08lx]:SPI[%08lx]\n", \ + regs->bbpc, regs->bbpsw, regs->spu, regs->spi); + printk("R0 [%08lx]:R1 [%08lx]:R2 [%08lx]:R3 [%08lx]\n", \ + regs->r0, regs->r1, regs->r2, regs->r3); + printk("R4 [%08lx]:R5 [%08lx]:R6 [%08lx]:R7 [%08lx]\n", \ + regs->r4, regs->r5, regs->r6, regs->r7); + printk("R8 [%08lx]:R9 [%08lx]:R10[%08lx]:R11[%08lx]\n", \ + regs->r8, regs->r9, regs->r10, regs->r11); + printk("R12[%08lx]\n", \ + regs->r12); + +#if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2) + printk("ACC0H[%08lx]:ACC0L[%08lx]\n", \ + regs->acc0h, regs->acc0l); + printk("ACC1H[%08lx]:ACC1L[%08lx]\n", \ + regs->acc1h, regs->acc1l); +#elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R) + printk("ACCH[%08lx]:ACCL[%08lx]\n", \ + regs->acc0h, regs->acc0l); +#else +#error unknown isa configuration +#endif +} + +/* + * Free current thread data structures etc.. + */ +void exit_thread(void) +{ + /* Nothing to do. */ + DPRINTK("pid = %d\n", current->pid); +} + +void flush_thread(void) +{ + DPRINTK("pid = %d\n", current->pid); + memset(¤t->thread.debug_trap, 0, sizeof(struct debug_trap)); +} + +void release_thread(struct task_struct *dead_task) +{ + /* do nothing */ + DPRINTK("pid = %d\n", dead_task->pid); +} + +/* Fill in the fpu structure for a core dump.. */ +int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu) +{ + return 0; /* Task didn't use the fpu at all. */ +} + +int copy_thread(unsigned long clone_flags, unsigned long spu, + unsigned long arg, struct task_struct *tsk) +{ + struct pt_regs *childregs = task_pt_regs(tsk); + extern void ret_from_fork(void); + extern void ret_from_kernel_thread(void); + + if (unlikely(tsk->flags & PF_KTHREAD)) { + memset(childregs, 0, sizeof(struct pt_regs)); + childregs->psw = M32R_PSW_BIE; + childregs->r1 = spu; /* fn */ + childregs->r0 = arg; + tsk->thread.lr = (unsigned long)ret_from_kernel_thread; + } else { + /* Copy registers */ + *childregs = *current_pt_regs(); + if (spu) + childregs->spu = spu; + childregs->r0 = 0; /* Child gets zero as return value */ + tsk->thread.lr = (unsigned long)ret_from_fork; + } + tsk->thread.sp = (unsigned long)childregs; + + return 0; +} + +/* + * These bracket the sleeping functions.. + */ +#define first_sched ((unsigned long) scheduling_functions_start_here) +#define last_sched ((unsigned long) scheduling_functions_end_here) + +unsigned long get_wchan(struct task_struct *p) +{ + /* M32R_FIXME */ + return (0); +} |