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authorJean-Philippe Brucker <jean-philippe.brucker@arm.com>2016-05-04 10:37:22 +0100
committerRussell King <rmk+kernel@armlinux.org.uk>2016-05-05 19:03:01 +0100
commit695665b0c5237bee8a3d0099ea856282d5d8f25b (patch)
tree219eb0f8229ded4af09f7eefd38f9c59f4ef6105 /arch/arm
parentac36a881b72a1e9831f1c59abf935868c90685cf (diff)
downloadleg-kernel-695665b0c5237bee8a3d0099ea856282d5d8f25b.tar.gz
ARM: 8571/1: nommu: fix PMSAv7 setup
Commit 1c2f87c (ARM: 8025/1: Get rid of meminfo) broke the support for MPU on ARMv7-R. This patch adapts the code inside CONFIG_ARM_MPU to use memblocks appropriately. MPU initialisation only uses the first memory region, and removes all subsequent ones. Because looping over all regions that need removal is inefficient, and memblock_remove already handles memory ranges, we can flatten the 'for_each_memblock' part. Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com> Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mm/nommu.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/arch/arm/mm/nommu.c b/arch/arm/mm/nommu.c
index 1dd10936d68d..4d113fcceb4a 100644
--- a/arch/arm/mm/nommu.c
+++ b/arch/arm/mm/nommu.c
@@ -87,7 +87,6 @@ static unsigned long irbar_read(void)
/* MPU initialisation functions */
void __init sanity_check_meminfo_mpu(void)
{
- int i;
phys_addr_t phys_offset = PHYS_OFFSET;
phys_addr_t aligned_region_size, specified_mem_size, rounded_mem_size;
struct memblock_region *reg;
@@ -110,11 +109,13 @@ void __init sanity_check_meminfo_mpu(void)
} else {
/*
* memblock auto merges contiguous blocks, remove
- * all blocks afterwards
+ * all blocks afterwards in one go (we can't remove
+ * blocks separately while iterating)
*/
pr_notice("Ignoring RAM after %pa, memory at %pa ignored\n",
- &mem_start, &reg->base);
- memblock_remove(reg->base, reg->size);
+ &mem_end, &reg->base);
+ memblock_remove(reg->base, 0 - reg->base);
+ break;
}
}
@@ -144,7 +145,7 @@ void __init sanity_check_meminfo_mpu(void)
pr_warn("Truncating memory from %pa to %pa (MPU region constraints)",
&specified_mem_size, &aligned_region_size);
memblock_remove(mem_start + aligned_region_size,
- specified_mem_size - aligned_round_size);
+ specified_mem_size - aligned_region_size);
mem_end = mem_start + aligned_region_size;
}
@@ -261,7 +262,7 @@ void __init mpu_setup(void)
return;
region_err = mpu_setup_region(MPU_RAM_REGION, PHYS_OFFSET,
- ilog2(meminfo.bank[0].size),
+ ilog2(memblock.memory.regions[0].size),
MPU_AP_PL1RW_PL0RW | MPU_RGN_NORMAL);
if (region_err) {
panic("MPU region initialization failure! %d", region_err);