* Copyright (C) 1995 Linus Torvalds
*
* SuperH version: Copyright (C) 1999, 2000 Niibe Yutaka & Kaz Kojima
+ * Copyright (C) 2006 Lineo Solutions Inc. support SH4A UBC
*/
/*
#include <linux/unistd.h>
#include <linux/mm.h>
#include <linux/elfcore.h>
-#include <linux/slab.h>
#include <linux/a.out.h>
+#include <linux/slab.h>
+#include <linux/pm.h>
#include <linux/ptrace.h>
-#include <linux/platform.h>
#include <linux/kallsyms.h>
+#include <linux/kexec.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/mmu_context.h>
#include <asm/elf.h>
-#if defined(CONFIG_SH_HS7751RVOIP)
-#include <asm/hs7751rvoip/hs7751rvoip.h>
-#elif defined(CONFIG_SH_RTS7751R2D)
-#include <asm/rts7751r2d/rts7751r2d.h>
-#endif
+#include <asm/ubc.h>
static int hlt_counter=0;
#define HARD_IDLE_TIMEOUT (HZ / 3)
+void (*pm_idle)(void);
+
+void (*pm_power_off)(void);
+EXPORT_SYMBOL(pm_power_off);
+
void disable_hlt(void)
{
hlt_counter++;
EXPORT_SYMBOL(enable_hlt);
void default_idle(void)
+{
+ if (!hlt_counter)
+ cpu_sleep();
+ else
+ cpu_relax();
+}
+
+void cpu_idle(void)
{
/* endless idle loop with no priority at all */
while (1) {
- if (hlt_counter) {
- while (1)
- if (need_resched())
- break;
- } else {
- while (!need_resched())
- cpu_sleep();
- }
+ void (*idle)(void) = pm_idle;
+
+ if (!idle)
+ idle = default_idle;
+ while (!need_resched())
+ idle();
+
+ preempt_enable_no_resched();
schedule();
+ preempt_disable();
}
}
-void cpu_idle(void)
-{
- default_idle();
-}
-
void machine_restart(char * __unused)
{
/* SR.BL=1 and invoke address error to let CPU reset (manual reset) */
"mov.l @%1, %0" : : "r" (0x10000000), "r" (0x80000001));
}
-EXPORT_SYMBOL(machine_restart);
-
void machine_halt(void)
{
-#if defined(CONFIG_SH_HS7751RVOIP)
- unsigned short value;
+ local_irq_disable();
- value = ctrl_inw(PA_OUTPORTR);
- ctrl_outw((value & 0xffdf), PA_OUTPORTR);
-#elif defined(CONFIG_SH_RTS7751R2D)
- ctrl_outw(0x0001, PA_POWOFF);
-#endif
while (1)
cpu_sleep();
}
-EXPORT_SYMBOL(machine_halt);
-
void machine_power_off(void)
{
-#if defined(CONFIG_SH_HS7751RVOIP)
- unsigned short value;
-
- value = ctrl_inw(PA_OUTPORTR);
- ctrl_outw((value & 0xffdf), PA_OUTPORTR);
-#elif defined(CONFIG_SH_RTS7751R2D)
- ctrl_outw(0x0001, PA_POWOFF);
-#endif
+ if (pm_power_off)
+ pm_power_off();
}
-EXPORT_SYMBOL(machine_power_off);
-
void show_regs(struct pt_regs * regs)
{
printk("\n");
- printk("Pid : %d, Comm: %20s\n", current->pid, current->comm);
- print_symbol("PC is at %s\n", regs->pc);
+ printk("Pid : %d:#%u, Comm: %20s\n",
+ current->pid, current->xid, current->comm);
+ print_symbol("PC is at %s\n", instruction_pointer(regs));
printk("PC : %08lx SP : %08lx SR : %08lx ",
regs->pc, regs->regs[15], regs->sr);
#ifdef CONFIG_MMU
printk("MACH: %08lx MACL: %08lx GBR : %08lx PR : %08lx\n",
regs->mach, regs->macl, regs->gbr, regs->pr);
- /*
- * If we're in kernel mode, dump the stack too..
- */
- if (!user_mode(regs)) {
- extern void show_task(unsigned long *sp);
- unsigned long sp = regs->regs[15];
-
- show_task((unsigned long *)sp);
- }
+ show_trace(NULL, (unsigned long *)regs->regs[15], regs);
}
/*
regs.sr = (1 << 30);
/* Ok, create the new process.. */
- return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, ®s, 0, NULL, NULL);
+ return do_fork(flags | CLONE_VM | CLONE_UNTRACED | CLONE_KTHREAD,
+ 0, ®s, 0, NULL, NULL);
}
/*
{
#if defined(CONFIG_SH_FPU)
struct task_struct *tsk = current;
- struct pt_regs *regs = (struct pt_regs *)
- ((unsigned long)tsk->thread_info
- + THREAD_SIZE - sizeof(struct pt_regs)
- - sizeof(unsigned long));
-
/* Forget lazy FPU state */
- clear_fpu(tsk, regs);
+ clear_fpu(tsk, task_pt_regs(tsk));
clear_used_math();
#endif
}
{
struct pt_regs ptregs;
- ptregs = *(struct pt_regs *)
- ((unsigned long)tsk->thread_info + THREAD_SIZE
- - sizeof(struct pt_regs)
-#ifdef CONFIG_SH_DSP
- - sizeof(struct pt_dspregs)
-#endif
- - sizeof(unsigned long));
+ ptregs = *task_pt_regs(tsk);
elf_core_copy_regs(regs, &ptregs);
return 1;
#if defined(CONFIG_SH_FPU)
fpvalid = !!tsk_used_math(tsk);
if (fpvalid) {
- struct pt_regs *regs = (struct pt_regs *)
- ((unsigned long)tsk->thread_info
- + THREAD_SIZE - sizeof(struct pt_regs)
- - sizeof(unsigned long));
- unlazy_fpu(tsk, regs);
+ unlazy_fpu(tsk, task_pt_regs(tsk));
memcpy(fpu, &tsk->thread.fpu.hard, sizeof(*fpu));
}
#endif
unsigned long unused,
struct task_struct *p, struct pt_regs *regs)
{
+ struct thread_info *ti = task_thread_info(p);
struct pt_regs *childregs;
#if defined(CONFIG_SH_FPU)
struct task_struct *tsk = current;
copy_to_stopped_child_used_math(p);
#endif
- childregs = ((struct pt_regs *)
- (THREAD_SIZE + (unsigned long) p->thread_info)
-#ifdef CONFIG_SH_DSP
- - sizeof(struct pt_dspregs)
-#endif
- - sizeof(unsigned long)) - 1;
+ childregs = task_pt_regs(p);
*childregs = *regs;
if (user_mode(regs)) {
childregs->regs[15] = usp;
+ ti->addr_limit = USER_DS;
} else {
- childregs->regs[15] = (unsigned long)p->thread_info + THREAD_SIZE;
+ childregs->regs[15] = (unsigned long)task_stack_page(p) + THREAD_SIZE;
+ ti->addr_limit = KERNEL_DS;
}
if (clone_flags & CLONE_SETTLS) {
childregs->gbr = childregs->regs[0];
return 0;
}
-/*
- * fill in the user structure for a core dump..
- */
-void dump_thread(struct pt_regs * regs, struct user * dump)
-{
- dump->magic = CMAGIC;
- dump->start_code = current->mm->start_code;
- dump->start_data = current->mm->start_data;
- dump->start_stack = regs->regs[15] & ~(PAGE_SIZE - 1);
- dump->u_tsize = (current->mm->end_code - dump->start_code) >> PAGE_SHIFT;
- dump->u_dsize = (current->mm->brk + (PAGE_SIZE-1) - dump->start_data) >> PAGE_SHIFT;
- dump->u_ssize = (current->mm->start_stack - dump->start_stack +
- PAGE_SIZE - 1) >> PAGE_SHIFT;
- /* Debug registers will come here. */
-
- dump->regs = *regs;
-
- dump->u_fpvalid = dump_fpu(regs, &dump->fpu);
-}
-
/* Tracing by user break controller. */
static void
ubc_set_tracing(int asid, unsigned long pc)
{
+#if defined(CONFIG_CPU_SH4A)
+ unsigned long val;
+
+ val = (UBC_CBR_ID_INST | UBC_CBR_RW_READ | UBC_CBR_CE);
+ val |= (UBC_CBR_AIE | UBC_CBR_AIV_SET(asid));
+
+ ctrl_outl(val, UBC_CBR0);
+ ctrl_outl(pc, UBC_CAR0);
+ ctrl_outl(0x0, UBC_CAMR0);
+ ctrl_outl(0x0, UBC_CBCR);
+
+ val = (UBC_CRR_RES | UBC_CRR_PCB | UBC_CRR_BIE);
+ ctrl_outl(val, UBC_CRR0);
+
+ /* Read UBC register that we writed last. For chekking UBC Register changed */
+ val = ctrl_inl(UBC_CRR0);
+
+#else /* CONFIG_CPU_SH4A */
ctrl_outl(pc, UBC_BARA);
+#ifdef CONFIG_MMU
/* We don't have any ASID settings for the SH-2! */
if (cpu_data->type != CPU_SH7604)
ctrl_outb(asid, UBC_BASRA);
+#endif
ctrl_outl(0, UBC_BAMRA);
- if (cpu_data->type == CPU_SH7729) {
+ if (cpu_data->type == CPU_SH7729 || cpu_data->type == CPU_SH7710) {
ctrl_outw(BBR_INST | BBR_READ | BBR_CPU, UBC_BBRA);
ctrl_outl(BRCR_PCBA | BRCR_PCTE, UBC_BRCR);
} else {
ctrl_outw(BBR_INST | BBR_READ, UBC_BBRA);
ctrl_outw(BRCR_PCBA, UBC_BRCR);
}
+#endif /* CONFIG_CPU_SH4A */
}
/*
struct task_struct *__switch_to(struct task_struct *prev, struct task_struct *next)
{
#if defined(CONFIG_SH_FPU)
- struct pt_regs *regs = (struct pt_regs *)
- ((unsigned long)prev->thread_info
- + THREAD_SIZE - sizeof(struct pt_regs)
- - sizeof(unsigned long));
- unlazy_fpu(prev, regs);
+ unlazy_fpu(prev, task_pt_regs(prev));
#endif
#ifdef CONFIG_PREEMPT
struct pt_regs *regs;
local_irq_save(flags);
- regs = (struct pt_regs *)
- ((unsigned long)prev->thread_info
- + THREAD_SIZE - sizeof(struct pt_regs)
-#ifdef CONFIG_SH_DSP
- - sizeof(struct pt_dspregs)
-#endif
- - sizeof(unsigned long));
+ regs = task_pt_regs(prev);
if (user_mode(regs) && regs->regs[15] >= 0xc0000000) {
int offset = (int)regs->regs[15];
}
#endif
+#ifdef CONFIG_MMU
/*
* Restore the kernel mode register
* k7 (r7_bank1)
*/
asm volatile("ldc %0, r7_bank"
: /* no output */
- : "r" (next->thread_info));
+ : "r" (task_thread_info(next)));
+#endif
-#ifdef CONFIG_MMU
/* If no tasks are using the UBC, we're done */
if (ubc_usercnt == 0)
/* If no tasks are using the UBC, we're done */;
else if (next->thread.ubc_pc && next->mm) {
- ubc_set_tracing(next->mm->context & MMU_CONTEXT_ASID_MASK,
- next->thread.ubc_pc);
+ int asid = 0;
+#ifdef CONFIG_MMU
+ asid |= next->mm->context.id & MMU_CONTEXT_ASID_MASK;
+#endif
+ ubc_set_tracing(asid, next->thread.ubc_pc);
} else {
+#if defined(CONFIG_CPU_SH4A)
+ ctrl_outl(UBC_CBR_INIT, UBC_CBR0);
+ ctrl_outl(UBC_CRR_INIT, UBC_CRR0);
+#else
ctrl_outw(0, UBC_BBRA);
ctrl_outw(0, UBC_BBRB);
- }
#endif
+ }
return prev;
}
asmlinkage int sys_fork(unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7,
- struct pt_regs regs)
+ struct pt_regs __regs)
{
+ struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
#ifdef CONFIG_MMU
- return do_fork(SIGCHLD, regs.regs[15], ®s, 0, NULL, NULL);
+ return do_fork(SIGCHLD, regs->regs[15], regs, 0, NULL, NULL);
#else
/* fork almost works, enough to trick you into looking elsewhere :-( */
return -EINVAL;
asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp,
unsigned long parent_tidptr,
unsigned long child_tidptr,
- struct pt_regs regs)
+ struct pt_regs __regs)
{
+ struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
if (!newsp)
- newsp = regs.regs[15];
- return do_fork(clone_flags, newsp, ®s, 0,
+ newsp = regs->regs[15];
+ return do_fork(clone_flags, newsp, regs, 0,
(int __user *)parent_tidptr, (int __user *)child_tidptr);
}
*/
asmlinkage int sys_vfork(unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7,
- struct pt_regs regs)
+ struct pt_regs __regs)
{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs.regs[15], ®s,
+ struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
+ return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->regs[15], regs,
0, NULL, NULL);
}
*/
asmlinkage int sys_execve(char *ufilename, char **uargv,
char **uenvp, unsigned long r7,
- struct pt_regs regs)
+ struct pt_regs __regs)
{
+ struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
int error;
char *filename;
error = do_execve(filename,
(char __user * __user *)uargv,
(char __user * __user *)uenvp,
- ®s);
+ regs);
if (error == 0) {
task_lock(current);
current->ptrace &= ~PT_DTRACE;
*/
pc = thread_saved_pc(p);
if (in_sched_functions(pc)) {
- schedule_frame = ((unsigned long *)(long)p->thread.sp)[1];
- return (unsigned long)((unsigned long *)schedule_frame)[1];
+ schedule_frame = (unsigned long)p->thread.sp;
+ return ((unsigned long *)schedule_frame)[21];
}
+
return pc;
}
-asmlinkage void break_point_trap(unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs regs)
+asmlinkage void break_point_trap(void)
{
/* Clear tracing. */
+#if defined(CONFIG_CPU_SH4A)
+ ctrl_outl(UBC_CBR_INIT, UBC_CBR0);
+ ctrl_outl(UBC_CRR_INIT, UBC_CRR0);
+#else
ctrl_outw(0, UBC_BBRA);
ctrl_outw(0, UBC_BBRB);
+#endif
current->thread.ubc_pc = 0;
ubc_usercnt -= 1;
asmlinkage void break_point_trap_software(unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7,
- struct pt_regs regs)
+ struct pt_regs __regs)
{
- regs.pc -= 2;
+ struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
+
+ /* Rewind */
+ regs->pc -= 2;
+
+#ifdef CONFIG_BUG
+ if (__kernel_text_address(instruction_pointer(regs))) {
+ u16 insn = *(u16 *)instruction_pointer(regs);
+ if (insn == TRAPA_BUG_OPCODE)
+ handle_BUG(regs);
+ }
+#endif
+
force_sig(SIGTRAP, current);
}
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