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);
}
Пример #2
0
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);
}
Пример #3
0
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);
}
Пример #4
0
/* 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;
		}
Пример #5
0
/* 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;
		}