This belongs to changeset 3795.

The patch changes the LDTSTOP length as well mostly default content of 0xec,
0xe4 and 0xe5 registers. I'm suspecting that the documentation may be wrong.

Furthermore this fix for powernow may not work on CPUs hit by errata #181.
Workaround should be implemented. The powernow may not work on pre-A2 revisions
of VT8237S silicon, revision reg is unknown.

Signed-off-by: Rudolf Marek <r.marek@assembler.cz>
Acked-by: Peter Stuge <peter@stuge.se>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3796 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

diff --git a/src/mainboard/asus/m2v-mx_se/cache_as_ram_auto.c b/src/mainboard/asus/m2v-mx_se/cache_as_ram_auto.c
index 2d79075f503e81e44eb19c48e45308d6e43ef159..b18fc0e0c7c124022bb4fad61c72f0e2d7142630 100644 (file)
--- a/src/mainboard/asus/m2v-mx_se/cache_as_ram_auto.c
+++ b/src/mainboard/asus/m2v-mx_se/cache_as_ram_auto.c
@@ -92,6 +92,8 @@ static inline int spd_read_byte(unsigned device, unsigned address)
 
 #define K8_4RANK_DIMM_SUPPORT 1
 
+
+
 #include "northbridge/amd/amdk8/amdk8.h"
 #include "northbridge/amd/amdk8/raminit_f.c"
 #include "northbridge/amd/amdk8/coherent_ht.c"
@@ -102,6 +104,21 @@ static inline int spd_read_byte(unsigned device, unsigned address)
 #include "cpu/amd/car/copy_and_run.c"
 #include "cpu/amd/car/post_cache_as_ram.c"
 #include "cpu/amd/model_fxx/init_cpus.c"
+
+#define SB_VFSMAF 0
+
+/* this function might fail on some K8 CPUs with errata #181 */
+static void ldtstop_sb(void)
+{
+       print_debug("toggle LDTSTP#\r\n");
+       u8 reg = inb (VT8237R_ACPI_IO_BASE + 0x5c);
+       reg = reg ^ (1 << 0);
+       outb(reg, VT8237R_ACPI_IO_BASE + 0x5c);
+       reg = inb(VT8237R_ACPI_IO_BASE + 0x15);
+       print_debug("done\r\n");
+}
+
+
 #include "cpu/amd/model_fxx/fidvid.c"
 #include "northbridge/amd/amdk8/resourcemap.c"