diff options
| author | Deepa Dinamani <deepad@codeaurora.org> | 2014-05-15 17:14:12 -0700 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2015-01-03 05:01:08 +0100 |
| commit | 2c04117eac0dbe5389af77abf9d550c73facc402 (patch) | |
| tree | e0cbc951d204f740cf09267b841a963c853ef69a /src/mainboard/google/storm/mainboard.c | |
| parent | 4d2d6ca79a03f60f28c8f8bc7591483260a15c1b (diff) | |
mainboard/storm: setup mmu in storm mainboard_init
enable protection of zero page access, provide for uncached device memory range,
and protect against access outside of DRAM except to device registers.
BUG=chrome-os-partner:28467
TEST=verified mmu.pagetable.list output:
_______address___________|_physical________________|sec|_d_|_size____|_permissions____________________|_glb|_shr|_pageflags______________________|
C:00000000--000FFFFF| | | | | | | | |
C:00100000--3FFFFFFF| A:00:00100000--3FFFFFFF| ns| 00| 00100000| P:readwrite U:readwrite notexec| yes| no | strongly ordered |
C:40000000--428FFFFF| A:00:40000000--428FFFFF| ns| 00| 00100000| P:readwrite U:readwrite exec | yes| no | write-back/no write alloc |
C:42900000--43CFFFFF| A:00:42900000--43CFFFFF| ns| 00| 00100000| P:readwrite U:readwrite notexec| yes| no | strongly ordered |
C:43D00000--5FFFFFFF| A:00:43D00000--5FFFFFFF| ns| 00| 00100000| P:readwrite U:readwrite exec | yes| no | write-back/no write alloc |
Original-Change-Id: If9beb10938841aead5105d662f0aef741995d708
Original-Signed-off-by: Deepa Dinamani <deepad@codeaurora.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/200341
Original-Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Commit-Queue: Vadim Bendebury <vbendeb@chromium.org>
Original-Tested-by: Vadim Bendebury <vbendeb@chromium.org>
(cherry picked from commit 09dd137453d8c6f1b60692b01226498e22f34fb2)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Conflicts:
src/mainboard/google/storm/mainboard.c
Change-Id: Idff7e3f0bc5903933e9f1b980f595666380696d1
Reviewed-on: http://review.coreboot.org/8010
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Diffstat (limited to 'src/mainboard/google/storm/mainboard.c')
| -rw-r--r-- | src/mainboard/google/storm/mainboard.c | 38 |
1 files changed, 36 insertions, 2 deletions
diff --git a/src/mainboard/google/storm/mainboard.c b/src/mainboard/google/storm/mainboard.c index 0b0182fceb..1e622f4904 100644 --- a/src/mainboard/google/storm/mainboard.c +++ b/src/mainboard/google/storm/mainboard.c @@ -1,7 +1,7 @@ /* * This file is part of the coreboot project. * - * Copyright 2013 Google Inc. + * Copyright 2014 Google Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -17,11 +17,45 @@ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ -#include <device/device.h> +#include <arch/cache.h> #include <boot/coreboot_tables.h> +#include <device/device.h> + +#define TO_MB(x) ((x)>>20) + +/* convenient shorthand (in MB) */ +#define DRAM_START TO_MB(CONFIG_SYS_SDRAM_BASE) +#define DRAM_SIZE (CONFIG_DRAM_SIZE_MB) +#define DRAM_END (DRAM_START + DRAM_SIZE) + +/* DMA memory for drivers */ +#define DMA_START TO_MB(CONFIG_DRAM_DMA_START) +#define DMA_SIZE TO_MB(CONFIG_DRAM_DMA_SIZE) + +static void setup_mmu(void) +{ + dcache_mmu_disable(); + + /* Map Device memory. */ + mmu_config_range(0, DRAM_START, DCACHE_OFF); + /* Disable Page 0 for trapping NULL pointer references. */ + mmu_disable_range(0, 1); + /* Map DRAM memory */ + mmu_config_range(DRAM_START, DRAM_SIZE, DCACHE_WRITEBACK); + /* Map DMA memory */ + if (DMA_SIZE) + mmu_config_range(DMA_START, DMA_SIZE, DCACHE_OFF); + + mmu_disable_range(DRAM_END, 4096 - DRAM_END); + + mmu_init(); + + dcache_mmu_enable(); +} static void mainboard_init(device_t dev) { + setup_mmu(); } static void mainboard_enable(device_t dev) |