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google/storm: enable zero page access protection.

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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>
This commit is contained in:
Deepa Dinamani
2015-02-18 15:48:44 -08:00
committed by Patrick Georgi
parent f96c7c7211
commit a386bf790e
1 changed files with 3 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
src/mainboard/google/storm/mmu.c
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@@ -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();