#include <asm/fpumacro.h>
#include <asm/head.h>
#include <asm/cpudata.h>
+#include <asm/mmu_context.h>
#include <asm/unistd.h>
+#include <asm/hypervisor.h>
/* #define VERBOSE_SHOWREGS */
-/*
- * Nothing special yet...
- */
-void default_idle(void)
-{
-}
-
-#ifndef CONFIG_SMP
-
-/*
- * the idle loop on a Sparc... ;)
- */
-void cpu_idle(void)
+static void sparc64_yield(void)
{
- /* endless idle loop with no priority at all */
- for (;;) {
- /* If current->work.need_resched is zero we should really
- * setup for a system wakup event and execute a shutdown
- * instruction.
- *
- * But this requires writing back the contents of the
- * L2 cache etc. so implement this later. -DaveM
- */
- while (!need_resched())
- barrier();
+ if (tlb_type != hypervisor)
+ return;
- schedule();
- check_pgt_cache();
+ clear_thread_flag(TIF_POLLING_NRFLAG);
+ smp_mb__after_clear_bit();
+
+ while (!need_resched()) {
+ unsigned long pstate;
+
+ /* Disable interrupts. */
+ __asm__ __volatile__(
+ "rdpr %%pstate, %0\n\t"
+ "andn %0, %1, %0\n\t"
+ "wrpr %0, %%g0, %%pstate"
+ : "=&r" (pstate)
+ : "i" (PSTATE_IE));
+
+ if (!need_resched())
+ sun4v_cpu_yield();
+
+ /* Re-enable interrupts. */
+ __asm__ __volatile__(
+ "rdpr %%pstate, %0\n\t"
+ "or %0, %1, %0\n\t"
+ "wrpr %0, %%g0, %%pstate"
+ : "=&r" (pstate)
+ : "i" (PSTATE_IE));
}
-}
-#else
+ set_thread_flag(TIF_POLLING_NRFLAG);
+}
-/*
- * the idle loop on a UltraMultiPenguin...
- */
-#define idle_me_harder() (cpu_data(smp_processor_id()).idle_volume += 1)
-#define unidle_me() (cpu_data(smp_processor_id()).idle_volume = 0)
+/* The idle loop on sparc64. */
void cpu_idle(void)
{
set_thread_flag(TIF_POLLING_NRFLAG);
+
while(1) {
if (need_resched()) {
- unidle_me();
- clear_thread_flag(TIF_POLLING_NRFLAG);
+ preempt_enable_no_resched();
schedule();
- set_thread_flag(TIF_POLLING_NRFLAG);
- check_pgt_cache();
+ preempt_disable();
}
- idle_me_harder();
-
- /* The store ordering is so that IRQ handlers on
- * other cpus see our increasing idleness for the buddy
- * redistribution algorithm. -DaveM
- */
- membar("#StoreStore | #StoreLoad");
+ sparc64_yield();
}
}
-#endif
-
extern char reboot_command [];
extern void (*prom_palette)(int);
panic("Halt failed!");
}
-EXPORT_SYMBOL(machine_halt);
-
void machine_alt_power_off(void)
{
if (!serial_console && prom_palette)
panic("Reboot failed!");
}
-EXPORT_SYMBOL(machine_restart);
-
+#ifdef CONFIG_COMPAT
static void show_regwindow32(struct pt_regs *regs)
{
struct reg_window32 __user *rw;
r_w.ins[0], r_w.ins[1], r_w.ins[2], r_w.ins[3],
r_w.ins[4], r_w.ins[5], r_w.ins[6], r_w.ins[7]);
}
+#else
+#define show_regwindow32(regs) do { } while (0)
+#endif
static void show_regwindow(struct pt_regs *regs)
{
extern long etrap, etraptl1;
#endif
__show_regs(regs);
+#if 0
#ifdef CONFIG_SMP
{
extern void smp_report_regs(void);
smp_report_regs();
}
#endif
+#endif
#ifdef VERBOSE_SHOWREGS
if (regs->tpc >= &etrap && regs->tpc < &etraptl1 &&
unsigned long thread_saved_pc(struct task_struct *tsk)
{
- struct thread_info *ti = tsk->thread_info;
+ struct thread_info *ti = task_thread_info(tsk);
unsigned long ret = 0xdeadbeefUL;
if (ti && ti->ksp) {
void flush_thread(void)
{
struct thread_info *t = current_thread_info();
+ struct mm_struct *mm;
if (t->flags & _TIF_ABI_PENDING)
t->flags ^= (_TIF_ABI_PENDING | _TIF_32BIT);
- if (t->task->mm) {
- unsigned long pgd_cache = 0UL;
- if (test_thread_flag(TIF_32BIT)) {
- struct mm_struct *mm = t->task->mm;
- pgd_t *pgd0 = &mm->pgd[0];
- pud_t *pud0 = pud_offset(pgd0, 0);
+ mm = t->task->mm;
+ if (mm)
+ tsb_context_switch(mm);
- if (pud_none(*pud0)) {
- pmd_t *page = pmd_alloc_one(mm, 0);
- pud_set(pud0, page);
- }
- pgd_cache = get_pgd_cache(pgd0);
- }
- __asm__ __volatile__("stxa %0, [%1] %2\n\t"
- "membar #Sync"
- : /* no outputs */
- : "r" (pgd_cache),
- "r" (TSB_REG),
- "i" (ASI_DMMU));
- }
set_thread_wsaved(0);
/* Turn off performance counters if on. */
}
}
+static void stack_unaligned(unsigned long sp)
+{
+ siginfo_t info;
+
+ info.si_signo = SIGBUS;
+ info.si_errno = 0;
+ info.si_code = BUS_ADRALN;
+ info.si_addr = (void __user *) sp;
+ info.si_trapno = 0;
+ force_sig_info(SIGBUS, &info, current);
+}
+
void fault_in_user_windows(void)
{
struct thread_info *t = current_thread_info();
flush_user_windows();
window = get_thread_wsaved();
- if (window != 0) {
+ if (likely(window != 0)) {
window -= 1;
do {
unsigned long sp = (t->rwbuf_stkptrs[window] + bias);
struct reg_window *rwin = &t->reg_window[window];
- if (copy_to_user((char __user *)sp, rwin, winsize))
+ if (unlikely(sp & 0x7UL))
+ stack_unaligned(sp);
+
+ if (unlikely(copy_to_user((char __user *)sp,
+ rwin, winsize)))
goto barf;
} while (window--);
}
unsigned long unused,
struct task_struct *p, struct pt_regs *regs)
{
- struct thread_info *t = p->thread_info;
+ struct thread_info *t = task_thread_info(p);
char *child_trap_frame;
-#ifdef CONFIG_DEBUG_SPINLOCK
- p->thread.smp_lock_count = 0;
- p->thread.smp_lock_pc = 0;
-#endif
-
/* Calculate offset to stack_frame & pt_regs */
- child_trap_frame = ((char *)t) + (THREAD_SIZE - (TRACEREG_SZ+STACKFRAME_SZ));
+ child_trap_frame = task_stack_page(p) + (THREAD_SIZE - (TRACEREG_SZ+STACKFRAME_SZ));
memcpy(child_trap_frame, (((struct sparc_stackf *)regs)-1), (TRACEREG_SZ+STACKFRAME_SZ));
t->flags = (t->flags & ~((0xffUL << TI_FLAG_CWP_SHIFT) | (0xffUL << TI_FLAG_CURRENT_DS_SHIFT))) |
- _TIF_NEWCHILD |
(((regs->tstate + 1) & TSTATE_CWP) << TI_FLAG_CWP_SHIFT);
+ t->new_child = 1;
t->ksp = ((unsigned long) child_trap_frame) - STACK_BIAS;
t->kregs = (struct pt_regs *)(child_trap_frame+sizeof(struct sparc_stackf));
t->fpsaved[0] = 0;
task->state == TASK_RUNNING)
goto out;
- thread_info_base = (unsigned long) task->thread_info;
+ thread_info_base = (unsigned long) task_stack_page(task);
bias = STACK_BIAS;
- fp = task->thread_info->ksp + bias;
+ fp = task_thread_info(task)->ksp + bias;
do {
/* Bogus frame pointer? */
git://git.onelab.eu / linux-2.6.git / blobdiff