diff options
| author | R Sricharan | 2013-03-04 20:04:45 +0000 |
|---|---|---|
| committer | Albert ARIBAUD | 2013-03-28 09:10:58 +0100 |
| commit | de63ac278cbaaa387da3efaf0b21b819c2b0c496 (patch) | |
| tree | 0fd5fac28bf5733062dee5a14881508569f4d709 /arch/arm/lib | |
| parent | 96fdbec2f96c9e11758c8742409069eeef841722 (diff) | |
ARM: mmu: Set domain permissions to client access
The 'XN' execute never bit is set in the pagetables. This will
prevent speculative prefetches to non executable regions. But the
domain permissions are set as master in the DACR register.
So the pagetable attribute for 'XN' is not effective. Change the
permissions to client.
This fixes lot of speculative prefetch aborts seen on OMAP5
secure devices.
Signed-off-by: R Sricharan <r.sricharan@ti.com>
Tested-by: Vincent Stehle <v-stehle@ti.com>
Cc: Vincent Stehle <v-stehle@ti.com>
Cc: Tom Rini <trini@ti.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Diffstat (limited to 'arch/arm/lib')
| -rw-r--r-- | arch/arm/lib/cache-cp15.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/lib/cache-cp15.c b/arch/arm/lib/cache-cp15.c index 6ecbedfed96..4abe1cf061a 100644 --- a/arch/arm/lib/cache-cp15.c +++ b/arch/arm/lib/cache-cp15.c @@ -36,6 +36,10 @@ void __arm_init_before_mmu(void) void arm_init_before_mmu(void) __attribute__((weak, alias("__arm_init_before_mmu"))); +__weak void arm_init_domains(void) +{ +} + static void cp_delay (void) { volatile int i; @@ -117,6 +121,9 @@ static inline void mmu_setup(void) /* Set the access control to all-supervisor */ asm volatile("mcr p15, 0, %0, c3, c0, 0" : : "r" (~0)); + + arm_init_domains(); + /* and enable the mmu */ reg = get_cr(); /* get control reg. */ cp_delay(); |