[coreboot-gerrit] New patch to review for coreboot: 7b38720 cygnus: enable mmu
Patrick Georgi (pgeorgi@google.com)
gerrit at coreboot.org
Thu Apr 16 15:22:21 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/9768
-gerrit
commit 7b38720c00f1ae134a66eda1fd3a8cb3e8a9a707
Author: Daisuke Nojiri <dnojiri at chromium.org>
Date: Tue Feb 17 13:43:35 2015 -0800
cygnus: enable mmu
this is not only for speed but also preventing the cpu from crashing.
the cpu is not happy when cache is cleaned without mmu turned on.
BUG=chrome-os-partner:36691
BRANCH=broadcom-firmware
TEST=boot purin to romstage.
Change-Id: I2445dcc2729798c4fc56fa191cbc8471ef708d08
Signed-off-by: Patrick Georgi <pgeorgi at chromium.org>
Original-Commit-Id: 9e35c925b75213e1d35bf191f22c39aaf1726eeb
Original-Signed-off-by: Daisuke Nojiri <dnojiri at chromium.org>
Original-Change-Id: Icaf8c506df258edb99413949e6e3089a2b1a91af
Original-Reviewed-on: https://chrome-internal-review.googlesource.com/199388
Original-Reviewed-by: Julius Werner <jwerner at chromium.org>
Original-Commit-Queue: Daisuke Nojiri <dnojiri at google.com>
Original-Tested-by: Daisuke Nojiri <dnojiri at google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/251306
---
src/soc/broadcom/cygnus/bootblock.c | 13 ++++++++++---
src/soc/broadcom/cygnus/include/soc/memlayout.ld | 1 +
2 files changed, 11 insertions(+), 3 deletions(-)
diff --git a/src/soc/broadcom/cygnus/bootblock.c b/src/soc/broadcom/cygnus/bootblock.c
index 37edf7f..3c6d242 100644
--- a/src/soc/broadcom/cygnus/bootblock.c
+++ b/src/soc/broadcom/cygnus/bootblock.c
@@ -17,13 +17,20 @@
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include <arch/cache.h>
#include <bootblock_common.h>
-#include <console/console.h>
+#include <stddef.h>
+#include <symbols.h>
void bootblock_soc_init(void)
{
/*
- * typically, this is the place where mmu is initialized to enable
- * cache. it helps speed up vboot verification.
+ * not only for speed but for preventing the cpu from crashing.
+ * the cpu is not happy when cache is cleaned without mmu turned on.
*/
+ mmu_init();
+ mmu_config_range(0, 4096, DCACHE_OFF);
+ mmu_config_range_kb((uintptr_t)_sram/KiB, _sram_size/KiB,
+ DCACHE_WRITETHROUGH);
+ dcache_mmu_enable();
}
diff --git a/src/soc/broadcom/cygnus/include/soc/memlayout.ld b/src/soc/broadcom/cygnus/include/soc/memlayout.ld
index c48c1bc..cfa50a5 100644
--- a/src/soc/broadcom/cygnus/include/soc/memlayout.ld
+++ b/src/soc/broadcom/cygnus/include/soc/memlayout.ld
@@ -31,6 +31,7 @@ SECTIONS
SRAM_START(0x02000000)
REGION(reserved_for_system_status, 0x02000000, 4K, 4)
TTB(0x02004000, 16K) /* must be aligned to 16K */
+ TTB_SUBTABLES(0x02008000, 1K)
REGION(reserved_for_maskrom, 0x02009400, 4K, 4)
BOOTBLOCK(0x0200A440, 18K)
PRERAM_CBMEM_CONSOLE(0x0200F000, 4K)
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