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>
diff --git a/src/mainboard/google/storm/mainboard.c b/src/mainboard/google/storm/mainboard.c
index 0b0182f..1e622f4 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)