[SPARC64]: Add infrastructure for dynamic TSB sizing.
[linux-2.6.git] / arch / sparc64 / kernel / process.c
index 02f9dec..26548fc 100644 (file)
@@ -44,6 +44,7 @@
 #include <asm/fpumacro.h>
 #include <asm/head.h>
 #include <asm/cpudata.h>
+#include <asm/mmu_context.h>
 #include <asm/unistd.h>
 
 /* #define VERBOSE_SHOWREGS */
@@ -164,6 +165,7 @@ void machine_restart(char * cmd)
        panic("Reboot failed!");
 }
 
+#ifdef CONFIG_COMPAT
 static void show_regwindow32(struct pt_regs *regs)
 {
        struct reg_window32 __user *rw;
@@ -189,6 +191,9 @@ static void show_regwindow32(struct pt_regs *regs)
               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)
 {
@@ -390,7 +395,7 @@ void show_regs32(struct pt_regs32 *regs)
 
 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) {
@@ -429,30 +434,15 @@ void exit_thread(void)
 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. */
@@ -616,11 +606,11 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
                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;
 
        /* 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))) |
@@ -845,9 +835,9 @@ unsigned long get_wchan(struct task_struct *task)
             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? */