From 1fc84ae84b5153e32a4b6ace507f9663e10b0cb2 Mon Sep 17 00:00:00 2001 From: Cyril Chemparathy Date: Mon, 16 Jul 2012 17:20:17 -0400 Subject: ARM: LPAE: use 64-bit accessors for TTBR registers This patch adds TTBR accessor macros, and modifies cpu_get_pgd() and the LPAE version of cpu_set_reserved_ttbr0() to use these instead. In the process, we also fix these functions to correctly handle cases where the physical address lies beyond the 4G limit of 32-bit addressing. Signed-off-by: Cyril Chemparathy Signed-off-by: Vitaly Andrianov Acked-by: Nicolas Pitre Reviewed-by: Catalin Marinas Tested-by: Santosh Shilimkar Tested-by: Subash Patel Signed-off-by: Will Deacon --- arch/arm/mm/context.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) (limited to 'arch/arm/mm') diff --git a/arch/arm/mm/context.c b/arch/arm/mm/context.c index 2ac3737..3675e31 100644 --- a/arch/arm/mm/context.c +++ b/arch/arm/mm/context.c @@ -20,6 +20,7 @@ #include #include #include +#include /* * On ARMv6, we have the following structure in the Context ID: @@ -55,17 +56,11 @@ static cpumask_t tlb_flush_pending; #ifdef CONFIG_ARM_LPAE static void cpu_set_reserved_ttbr0(void) { - unsigned long ttbl = __pa(swapper_pg_dir); - unsigned long ttbh = 0; - /* * Set TTBR0 to swapper_pg_dir which contains only global entries. The * ASID is set to 0. */ - asm volatile( - " mcrr p15, 0, %0, %1, c2 @ set TTBR0\n" - : - : "r" (ttbl), "r" (ttbh)); + cpu_set_ttbr(0, __pa(swapper_pg_dir)); isb(); } #else -- cgit v1.1