Add the MSR writes that are needed to provide VGA legacy routing for the Geode LX

Add appropriate Kconfig defines to provide 8mb of VGA ram allocation
Add the Kconfig defines to cover TSC calibration from TIMER2 and UDELAY setup
Two small warning removals about excessive prototyping.

Signed-off-by: Edwin Beasant <edwin_beasant@virtensys.com>
Acked-by: Ronald G. Minnich <rminnich@gmail.com>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5059 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

3 files changed, 47 insertions, 5 deletions

diff --git a/src/northbridge/amd/lx/Kconfig b/src/northbridge/amd/lx/Kconfig
index 002cc8a7aa..75a93a148d 100644
--- a/src/northbridge/amd/lx/Kconfig
+++ b/src/northbridge/amd/lx/Kconfig
@@ -1,4 +1,8 @@
 config NORTHBRIDGE_AMD_LX
 	bool
 	select HAVE_HIGH_TABLES
-
+	
+config VIDEO_MB
+	int
+	default 8
+	depends on NORTHBRIDGE_AMD_LX
diff --git a/src/northbridge/amd/lx/grphinit.c b/src/northbridge/amd/lx/grphinit.c
index e505f77580..1312d78f84 100644
--- a/src/northbridge/amd/lx/grphinit.c
+++ b/src/northbridge/amd/lx/grphinit.c
@@ -22,6 +22,45 @@
 #include <stdint.h>
 #include <cpu/amd/vr.h>
 #include <console/console.h>
+#include <cpu/amd/lxdef.h>
+#include <cpu/x86/msr.h>
+#include <stdlib.h>
+
+void geodelx_vga_msr_init(void);
+void graphics_init(void);
+
+struct msrinit {
+	u32 msrnum;
+	msr_t msr;
+};
+
+static const struct msrinit geodelx_vga_msr[] = {
+	/* Enable the GLIU Memory routing to the hardware 
+	* PDID1 : Port 4, GLIU0
+	* PBASE : 0x000A0
+	* PMASK : 0xFFFE0
+	*/
+	{.msrnum = MSR_GLIU0_BASE4, {.lo = 0x0a0fffe0, .hi = 0x80000000}},
+	/* Enable the GLIU IO Routing
+	* IDID  : Port 4, GLIU0
+	* IBASE : 0x003c0
+	* IMASK : 0xffff0
+	*/
+	{.msrnum = GLIU0_IOD_BM_0,  {.lo = 0x3c0ffff0, .hi = 0x80000000}},
+	/* Enable the GLIU IO Routing
+	* IDID  : Port 4, GLIU0
+	* IBASE : 0x003d0
+	* IMASK : 0xffff0
+	*/
+	{.msrnum = GLIU0_IOD_BM_1,  {.lo = 0x3d0ffff0, .hi = 0x80000000}},
+};
+
+void geodelx_vga_msr_init(void)
+{
+	int i;
+	for (i = 0; i < ARRAY_SIZE(geodelx_vga_msr); i++)
+		wrmsr(geodelx_vga_msr[i].msrnum, geodelx_vga_msr[i].msr);
+}
 
  /*
   * This function mirrors the Graphics_Init routine in GeodeROM.
@@ -32,7 +71,9 @@ void graphics_init(void)
 
 	/* SoftVG initialization */
 	printk_debug("Graphics init...\n");
-
+   
+	geodelx_vga_msr_init();
+   
 	/* Call SoftVG with the main configuration parameters. */
 	/* NOTE: SoftVG expects the memory size to be given in 2MB blocks */
 
diff --git a/src/northbridge/amd/lx/northbridgeinit.c b/src/northbridge/amd/lx/northbridgeinit.c
index 4f00a80891..8c7a7a8af6 100644
--- a/src/northbridge/amd/lx/northbridgeinit.c
+++ b/src/northbridge/amd/lx/northbridgeinit.c
@@ -99,7 +99,6 @@ struct msrinit GeodeLinkPriorityTable[] = {
 	{0x0FFFFFFFF, {0x0FFFFFFFF, 0x0FFFFFFFF}},	/*  END */
 };
 
-extern int sizeram(void);
 
 static void writeglmsr(struct gliutable *gl)
 {
@@ -122,7 +121,6 @@ static void ShadowInit(struct gliutable *gl)
 	}
 }
 
-extern int sizeram(void);
 static void SysmemInit(struct gliutable *gl)
 {
 	msr_t msr;
@@ -749,7 +747,6 @@ uint32_t get_systop(void)
 /* ***************************************************************************/
 void northbridge_init_early(void)
 {
-	msr_t msr;
 	int i;
 	printk_debug("Enter %s\n", __func__);