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authorDeepa Dinamani <deepad@codeaurora.org>2015-02-18 15:48:44 -0800
committerPatrick Georgi <pgeorgi@google.com>2015-04-22 20:00:08 +0200
commita386bf790ed393dadc449910bbc21b03010cf49c (patch)
treee28e5254f01197a76b3788af06b8287065c65588 /src/mainboard
parentf96c7c721185ef1ed868c3819f7c8f12602c408f (diff)
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google/storm: enable zero page access protection.
BRANCH=storm BUG=chrome-os-partner:24786 TEST=verified mmu.pagetable.list output for Storm: _______address___________|_physical________________|sec|_d_|_size____|_permissions____________________|_glb|_shr|_pageflags______________________| C:00000000--00000FFF| | | | | | | | | C:00001000--000FFFFF| A:00:00001000--000FFFFF| ns| 00| 00001000| P:readwrite U:readwrite notexec| yes| no | strongly ordered | C:00100000--29FFFFFF| A:00:00100000--29FFFFFF| ns| 00| 00100000| P:readwrite U:readwrite notexec| yes| no | strongly ordered | C:2A000000--2A05FFFF| A:00:2A000000--2A05FFFF| ns| 00| 00001000| P:readwrite U:readwrite exec | yes| no | write-back/no write alloc | C:2A060000--2A0FFFFF| A:00:2A060000--2A0FFFFF| ns| 00| 00001000| P:readwrite U:readwrite notexec| yes| no | strongly ordered | C:2A100000--3FFFFFFF| A:00:2A100000--3FFFFFFF| ns| 00| 00100000| P:readwrite U:readwrite notexec| yes| no | strongly ordered | C:40000000--59FFFFFF| A:00:40000000--59FFFFFF| ns| 00| 00100000| P:readwrite U:readwrite exec | yes| no | write-back/no write alloc | C:5A000000--5A1FFFFF| A:00:5A000000--5A1FFFFF| ns| 00| 00100000| P:readwrite U:readwrite notexec| yes| no | strongly ordered | C:5A200000--7FFFFFFF| A:00:5A200000--7FFFFFFF| ns| 00| 00100000| P:readwrite U:readwrite exec | yes| no | write-back/no write alloc | C:80000000--FFFFFFFF| | | | | | | | | Change-Id: I08a5094b2da9d67244c94984e2da14399e477b01 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: f137a589434b09055e6b9d32907e662e6c296502 Original-Change-Id: Ia2deab1cf8f08c4ba5a5b6dbe4c4ebf29c9df480 Original-Signed-off-by: Vikas Das <vdas@codeaurora.org> Original-Reviewed-on: https://chromium-review.googlesource.com/253801 Original-Tested-by: Deepa Dinamani <deepad@codeaurora.org> Original-Reviewed-by: Vadim Bendebury <vbendeb@chromium.org> Original-Reviewed-by: Julius Werner <jwerner@chromium.org> Original-Commit-Queue: Deepa Dinamani <deepad@codeaurora.org> Reviewed-on: http://review.coreboot.org/9920 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/mainboard')
-rw-r--r--src/mainboard/google/storm/mmu.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/src/mainboard/google/storm/mmu.c b/src/mainboard/google/storm/mmu.c
index 47e3b0978..4d2e9a012 100644
--- a/src/mainboard/google/storm/mmu.c
+++ b/src/mainboard/google/storm/mmu.c
@@ -51,8 +51,6 @@ void setup_mmu(enum dram_state dram)
/* Map Device memory. */
mmu_config_range_kb(RPM_START, RPM_SIZE, DCACHE_OFF);
- /* TODO: disable Page 0 for trapping NULL pointer references. */
-
mmu_config_range_kb(SRAM_START, SRAM_END - SRAM_START,
DCACHE_WRITEBACK);
@@ -61,6 +59,9 @@ void setup_mmu(enum dram_state dram)
mmu_disable_range(DRAM_END, 4096 - DRAM_END);
+ /* disable Page 0 for trapping NULL pointer references. */
+ mmu_disable_range_kb(0, 1);
+
mmu_init();
dcache_mmu_enable();