linux/arch/powerpc/kernel/swsusp.c
Benjamin Herrenschmidt 5e696617c4 powerpc/mm: Split mmu_context handling
This splits the mmu_context handling between 32-bit hash based
processors, 64-bit hash based processors and everybody else.  This is
preliminary work for adding SMP support for BookE processors.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-12-21 14:21:15 +11:00

40 lines
900 B
C

/*
* Common powerpc suspend code for 32 and 64 bits
*
* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/sched.h>
#include <asm/suspend.h>
#include <asm/system.h>
#include <asm/current.h>
#include <asm/mmu_context.h>
void save_processor_state(void)
{
/*
* flush out all the special registers so we don't need
* to save them in the snapshot
*/
flush_fp_to_thread(current);
flush_altivec_to_thread(current);
flush_spe_to_thread(current);
#ifdef CONFIG_PPC64
hard_irq_disable();
#endif
}
void restore_processor_state(void)
{
#ifdef CONFIG_PPC32
switch_mmu_context(NULL, current->active_mm);
#endif
}