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authorEdwin Beasant <edwin_beasant@virtensys.com>2010-01-26 11:22:43 +0000
committerPatrick Georgi <patrick.georgi@coresystems.de>2010-01-26 11:22:43 +0000
commita9796ed362f0d2b80f6c4e59c94db5d564324ebb (patch)
treeff2eb71b69a93badce5d8b9e6d2933446d0a335b /src/mainboard
parente8d943f2668ab25d98ed61cd10d68353c4915f4b (diff)
downloadcoreboot-a9796ed362f0d2b80f6c4e59c94db5d564324ebb.tar.xz
- Clean up and comment writing of MSRs for cache control (Backport from v3)
- Invalidate Cache Tags (by means of in-place rewrite of cache data) which allows CAR data to be flushed to RAM - Re-enable cache after flush of CAR to RAM Signed-off-by: Edwin Beasant <edwin_beasant@virtensys.com> Acked-by: Patrick Georgi <patrick.georgi@coresystems.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5055 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/mainboard')
-rw-r--r--src/mainboard/amd/db800/cache_as_ram_auto.c60
1 files changed, 31 insertions, 29 deletions
diff --git a/src/mainboard/amd/db800/cache_as_ram_auto.c b/src/mainboard/amd/db800/cache_as_ram_auto.c
index 5ee6dbb748..c18b0bb154 100644
--- a/src/mainboard/amd/db800/cache_as_ram_auto.c
+++ b/src/mainboard/amd/db800/cache_as_ram_auto.c
@@ -35,6 +35,7 @@
#include <cpu/amd/geode_post_code.h>
#include "southbridge/amd/cs5536/cs5536.h"
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
#define POST_CODE(x) outb(x, 0x80)
#define SERIAL_DEV PNP_DEV(0x2e, W83627HF_SP1)
@@ -60,37 +61,38 @@ static inline int spd_read_byte(unsigned int device, unsigned int address)
#include "cpu/amd/model_lx/cpureginit.c"
#include "cpu/amd/model_lx/syspreinit.c"
+struct msrinit {
+ u32 msrnum;
+ msr_t msr;
+ };
+
+static const struct msrinit msr_table[] =
+{
+ {CPU_RCONF_DEFAULT, {.hi = 0x24fffc02,.lo = 0x1000A000}}, /* Setup access to cache under 1MB.
+ * Rom Properties: Write Serialize, WriteProtect.
+ * RomBase: 0xFFFC0
+ * SysTop to RomBase Properties: Write Serialize, Cache Disable.
+ * SysTop: 0x000A0
+ * System Memory Properties: (Write Back) */
+ {CPU_RCONF_A0_BF, {.hi = 0x00000000,.lo = 0x00000000}}, /* 0xA0000-0xBFFFF : (Write Back) */
+ {CPU_RCONF_C0_DF, {.hi = 0x00000000,.lo = 0x00000000}}, /* 0xC0000-0xDFFFF : (Write Back) */
+ {CPU_RCONF_E0_FF, {.hi = 0x00000000,.lo = 0x00000000}}, /* 0xE0000-0xFFFFF : (Write Back) */
+
+ /* Setup access to memory under 1MB. Note: VGA hole at 0xA0000-0xBFFFF */
+ {MSR_GLIU0_BASE1, {.hi = 0x20000000,.lo = 0x000fff80}}, // 0x00000-0x7FFFF
+ {MSR_GLIU0_BASE2, {.hi = 0x20000000,.lo = 0x080fffe0}}, // 0x80000-0x9FFFF
+ {MSR_GLIU0_SHADOW, {.hi = 0x2000FFFF,.lo = 0xFFFF0003}}, // 0xC0000-0xFFFFF
+ {MSR_GLIU1_BASE1, {.hi = 0x20000000,.lo = 0x000fff80}}, // 0x00000-0x7FFFF
+ {MSR_GLIU1_BASE2, {.hi = 0x20000000,.lo = 0x080fffe0}}, // 0x80000-0x9FFFF
+ {MSR_GLIU1_SHADOW, {.hi = 0x2000FFFF,.lo = 0xFFFF0003}}, // 0xC0000-0xFFFFF
+};
+
+
static void msr_init(void)
{
- msr_t msr;
-
- /* Setup access to the cache for under 1MB. */
- msr.hi = 0x24fffc02;
- msr.lo = 0x1000A000; /* 0-A0000 write back */
- wrmsr(CPU_RCONF_DEFAULT, msr);
-
- msr.hi = 0x0; /* Write back */
- msr.lo = 0x0;
- wrmsr(CPU_RCONF_A0_BF, msr);
- wrmsr(CPU_RCONF_C0_DF, msr);
- wrmsr(CPU_RCONF_E0_FF, msr);
-
- /* Setup access to the cache for under 640K. Note MC not setup yet. */
- msr.hi = 0x20000000;
- msr.lo = 0xfff80;
- wrmsr(MSR_GLIU0 + 0x20, msr);
-
- msr.hi = 0x20000000;
- msr.lo = 0x80fffe0;
- wrmsr(MSR_GLIU0 + 0x21, msr);
-
- msr.hi = 0x20000000;
- msr.lo = 0xfff80;
- wrmsr(MSR_GLIU1 + 0x20, msr);
-
- msr.hi = 0x20000000;
- msr.lo = 0x80fffe0;
- wrmsr(MSR_GLIU1 + 0x21, msr);
+ int i;
+ for (i = 0; i < ARRAY_SIZE(msr_table); i++)
+ wrmsr(msr_table[i].msrnum, msr_table[i].msr);
}
static void mb_gpio_init(void)