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authorDeepa Dinamani <deepad@codeaurora.org>2014-05-15 17:14:12 -0700
committerKyösti Mälkki <kyosti.malkki@gmail.com>2015-01-03 05:01:08 +0100
commit2c04117eac0dbe5389af77abf9d550c73facc402 (patch)
treee0cbc951d204f740cf09267b841a963c853ef69a /src/mainboard/google
parent4d2d6ca79a03f60f28c8f8bc7591483260a15c1b (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')
-rw-r--r--src/mainboard/google/storm/mainboard.c38
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)