diff options
| author | Olof Johansson <olof@lixom.net> | 2011-12-17 20:05:50 -0800 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2011-12-17 20:05:50 -0800 |
| commit | d695cfa54e9ec48aeb149cadc8dab1240751572a (patch) | |
| tree | 503d342f303181c4a8e4fb89e070117d5760c513 /arch/arm/mm/context.c | |
| parent | c3e00a0eff4c05717915ac7a8e4646db3882aebf (diff) | |
| parent | 3bdc3484e8f2b1b219ad0397d81ce4601fbaf76d (diff) | |
Merge remote-tracking branch 'rmk/devel-stable' into for-3.3/soc
Conflicts:
arch/arm/mach-tegra/board-dt.c
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch/arm/mm/context.c')
| -rw-r--r-- | arch/arm/mm/context.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/arch/arm/mm/context.c b/arch/arm/mm/context.c index 93aac068da94..ee9bb363d606 100644 --- a/arch/arm/mm/context.c +++ b/arch/arm/mm/context.c @@ -22,6 +22,21 @@ unsigned int cpu_last_asid = ASID_FIRST_VERSION; DEFINE_PER_CPU(struct mm_struct *, current_mm); #endif +#ifdef CONFIG_ARM_LPAE +#define cpu_set_asid(asid) { \ + unsigned long ttbl, ttbh; \ + asm volatile( \ + " mrrc p15, 0, %0, %1, c2 @ read TTBR0\n" \ + " mov %1, %2, lsl #(48 - 32) @ set ASID\n" \ + " mcrr p15, 0, %0, %1, c2 @ set TTBR0\n" \ + : "=&r" (ttbl), "=&r" (ttbh) \ + : "r" (asid & ~ASID_MASK)); \ +} +#else +#define cpu_set_asid(asid) \ + asm(" mcr p15, 0, %0, c13, c0, 1\n" : : "r" (asid)) +#endif + /* * We fork()ed a process, and we need a new context for the child * to run in. We reserve version 0 for initial tasks so we will @@ -37,7 +52,7 @@ void __init_new_context(struct task_struct *tsk, struct mm_struct *mm) static void flush_context(void) { /* set the reserved ASID before flushing the TLB */ - asm("mcr p15, 0, %0, c13, c0, 1\n" : : "r" (0)); + cpu_set_asid(0); isb(); local_flush_tlb_all(); if (icache_is_vivt_asid_tagged()) { @@ -99,7 +114,7 @@ static void reset_context(void *info) set_mm_context(mm, asid); /* set the new ASID */ - asm("mcr p15, 0, %0, c13, c0, 1\n" : : "r" (mm->context.id)); + cpu_set_asid(mm->context.id); isb(); } |