void flush_tlb_pending(void)
{
struct tlb_batch *tb = &get_cpu_var(tlb_batch);
struct mm_struct *mm = tb->mm;
if (!tb->tlb_nr)
goto out;
flush_tsb_user(tb);
if (CTX_VALID(mm->context)) {
if (tb->tlb_nr == 1) {
global_flush_tlb_page(mm, tb->vaddrs[0]);
} else {
#ifdef CONFIG_SMP
smp_flush_tlb_pending(tb->mm, tb->tlb_nr,
&tb->vaddrs[0]);
#else
__flush_tlb_pending(CTX_HWBITS(tb->mm->context),
tb->tlb_nr, &tb->vaddrs[0]);
#endif
}
}
tb->tlb_nr = 0;
out:
put_cpu_var(tlb_batch);
}
void flush_tlb_pending(void)
{
struct mmu_gather *mp = &get_cpu_var(mmu_gathers);
if (mp->tlb_nr) {
flush_tsb_user(mp);
if (CTX_VALID(mp->mm->context)) {
#ifdef CONFIG_SMP
smp_flush_tlb_pending(mp->mm, mp->tlb_nr,
&mp->vaddrs[0]);
#else
__flush_tlb_pending(CTX_HWBITS(mp->mm->context),
mp->tlb_nr, &mp->vaddrs[0]);
#endif
}
mp->tlb_nr = 0;
}
put_cpu_var(mmu_gathers);
}
void flush_tlb_pending(void)
{
struct tlb_batch *tb = &get_cpu_var(tlb_batch);
if (tb->tlb_nr) {
flush_tsb_user(tb);
if (CTX_VALID(tb->mm->context)) {
#ifdef CONFIG_SMP
smp_flush_tlb_pending(tb->mm, tb->tlb_nr,
&tb->vaddrs[0]);
#else
__flush_tlb_pending(CTX_HWBITS(tb->mm->context),
tb->tlb_nr, &tb->vaddrs[0]);
#endif
}
tb->tlb_nr = 0;
}
put_cpu_var(tlb_batch);
}
/* Pretty sick eh? */
int prom_callback(long *args)
{
struct console *cons, *saved_console = NULL;
unsigned long flags;
char *cmd;
extern spinlock_t prom_entry_lock;
if (!args)
return -1;
if (!(cmd = (char *)args[0]))
return -1;
/*
* The callback can be invoked on the cpu that first dropped
* into prom_cmdline after taking the serial interrupt, or on
* a slave processor that was smp_captured() if the
* administrator has done a switch-cpu inside obp. In either
* case, the cpu is marked as in-interrupt. Drop IRQ locks.
*/
irq_exit();
/* XXX Revisit the locking here someday. This is a debugging
* XXX feature so it isnt all that critical. -DaveM
*/
local_irq_save(flags);
spin_unlock(&prom_entry_lock);
cons = console_drivers;
while (cons) {
unregister_console(cons);
cons->flags &= ~(CON_PRINTBUFFER);
cons->next = saved_console;
saved_console = cons;
cons = console_drivers;
}
register_console(&prom_console);
if (!strcmp(cmd, "sync")) {
prom_printf("PROM `%s' command...\n", cmd);
show_free_areas();
if (current->pid != 0) {
local_irq_enable();
sys_sync();
local_irq_disable();
}
args[2] = 0;
args[args[1] + 3] = -1;
prom_printf("Returning to PROM\n");
} else if (!strcmp(cmd, "va>tte-data")) {
unsigned long ctx, va;
unsigned long tte = 0;
long res = PROM_FALSE;
ctx = args[3];
va = args[4];
if (ctx) {
/*
* Find process owning ctx, lookup mapping.
*/
struct task_struct *p;
struct mm_struct *mm = NULL;
pgd_t *pgdp;
pmd_t *pmdp;
pte_t *ptep;
for_each_process(p) {
mm = p->mm;
if (CTX_HWBITS(mm->context) == ctx)
break;
}
if (!mm ||
CTX_HWBITS(mm->context) != ctx)
goto done;
pgdp = pgd_offset(mm, va);
if (pgd_none(*pgdp))
goto done;
pmdp = pmd_offset(pgdp, va);
if (pmd_none(*pmdp))
goto done;
/* Preemption implicitly disabled by virtue of
* being called from inside OBP.
*/
ptep = pte_offset_map(pmdp, va);
if (pte_present(*ptep)) {
tte = pte_val(*ptep);
res = PROM_TRUE;
}
pte_unmap(ptep);
goto done;
}
if ((va >= KERNBASE) && (va < (KERNBASE + (4 * 1024 * 1024)))) {
/* Spitfire Errata #32 workaround */
__asm__ __volatile__("stxa %0, [%1] %2\n\t"
"flush %%g6"
: /* No outputs */
: "r" (0),
"r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
/*
* Locked down tlb entry.
*/
if (tlb_type == spitfire)
tte = spitfire_get_dtlb_data(SPITFIRE_HIGHEST_LOCKED_TLBENT);
else if (tlb_type == cheetah || tlb_type == cheetah_plus)
tte = cheetah_get_ldtlb_data(CHEETAH_HIGHEST_LOCKED_TLBENT);
res = PROM_TRUE;
goto done;
}
/* Pretty sick eh? */
int prom_callback(long *args)
{
struct console *cons, *saved_console = NULL;
unsigned long flags;
char *cmd;
if (!args)
return -1;
if (!(cmd = (char *)args[0]))
return -1;
save_and_cli(flags);
cons = console_drivers;
while (cons) {
unregister_console(cons);
cons->flags &= ~(CON_PRINTBUFFER);
cons->next = saved_console;
saved_console = cons;
cons = console_drivers;
}
register_console(&prom_console);
if (!strcmp(cmd, "sync")) {
prom_printf("PROM `%s' command...\n", cmd);
show_free_areas();
if(current->pid != 0) {
sti();
sys_sync();
cli();
}
args[2] = 0;
args[args[1] + 3] = -1;
prom_printf("Returning to PROM\n");
} else if (!strcmp(cmd, "va>tte-data")) {
unsigned long ctx, va;
unsigned long tte = 0;
long res = PROM_FALSE;
ctx = args[3];
va = args[4];
if (ctx) {
/*
* Find process owning ctx, lookup mapping.
*/
struct task_struct *p;
struct mm_struct *mm = NULL;
pgd_t *pgdp;
pmd_t *pmdp;
pte_t *ptep;
for_each_task(p) {
mm = p->mm;
if (CTX_HWBITS(mm->context) == ctx)
break;
}
if (!mm ||
CTX_HWBITS(mm->context) != ctx)
goto done;
pgdp = pgd_offset(mm, va);
if (pgd_none(*pgdp))
goto done;
pmdp = pmd_offset(pgdp, va);
if (pmd_none(*pmdp))
goto done;
ptep = pte_offset(pmdp, va);
if (!pte_present(*ptep))
goto done;
tte = pte_val(*ptep);
res = PROM_TRUE;
goto done;
}
if ((va >= KERNBASE) && (va < (KERNBASE + (4 * 1024 * 1024)))) {
/* Spitfire Errata #32 workaround */
__asm__ __volatile__("stxa %0, [%1] %2\n\t"
"flush %%g6"
: /* No outputs */
: "r" (0),
"r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
/*
* Locked down tlb entry 63.
*/
tte = spitfire_get_dtlb_data(63);
res = PROM_TRUE;
goto done;
}