[coreboot-gerrit] Patch set updated for coreboot: 1e06e04 google/storm: enable zero page access protection.
Patrick Georgi (pgeorgi@google.com)
gerrit at coreboot.org
Wed Apr 22 09:07:04 CEST 2015
Patrick Georgi (pgeorgi at google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/9920
-gerrit
commit 1e06e0485fa6615b0f640a9a54ff140d5fcfe34e
Author: Deepa Dinamani <deepad at codeaurora.org>
Date: Wed Feb 18 15:48:44 2015 -0800
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 at chromium.org>
Original-Commit-Id: f137a589434b09055e6b9d32907e662e6c296502
Original-Change-Id: Ia2deab1cf8f08c4ba5a5b6dbe4c4ebf29c9df480
Original-Signed-off-by: Vikas Das <vdas at codeaurora.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/253801
Original-Tested-by: Deepa Dinamani <deepad at codeaurora.org>
Original-Reviewed-by: Vadim Bendebury <vbendeb at chromium.org>
Original-Reviewed-by: Julius Werner <jwerner at chromium.org>
Original-Commit-Queue: Deepa Dinamani <deepad at codeaurora.org>
---
src/mainboard/google/storm/mmu.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/src/mainboard/google/storm/mmu.c b/src/mainboard/google/storm/mmu.c
index 47e3b09..4d2e9a0 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();
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