1 files changed, 43 insertions, 0 deletions
diff --git a/src/northbridge/amd/lx/grphinit.c b/src/northbridge/amd/lx/grphinit.c
new file mode 100644
index 0000000000..4e0da1789d
--- /dev/null
+++ b/src/northbridge/amd/lx/grphinit.c
@@ -0,0 +1,43 @@
+#include <arch/io.h>
+#include <stdint.h>
+#include <cpu/amd/vr.h>
+ 
+#define VIDEO_MB	8					// MB of video memory
+
+/*
+ * Write to a Virtual Register
+ * AX = Class/Index
+ * CX = data to write
+ */
+void vrWrite(uint16_t wClassIndex, uint16_t wData)
+{
+	outl(((uint32_t) VR_UNLOCK << 16) | wClassIndex, VRC_INDEX);
+	outw(wData, VRC_DATA);
+}
+
+ /*
+ * Read from a Virtual Register
+ * AX = Class/Index
+ * Returns a 16-bit word of data
+ */
+uint16_t vrRead(uint16_t wClassIndex)
+{
+	uint16_t wData;
+	outl(((uint32_t) VR_UNLOCK << 16) | wClassIndex, VRC_INDEX);
+	wData = inw(VRC_DATA);
+	return wData;
+}
+
+/*
+ * This function mirrors the Graphics_Init routine in GeodeROM.
+ */
+void graphics_init(void)
+{
+	/* SoftVG initialization */
+
+	/* Call SoftVG with the main configuration parameters. */
+	/* NOTE: SoftVG expects the memory size to be given in 512 KB pages */
+	vrWrite((VRC_VG <<  8) + VG_MEM_SIZE, 0x0100 | (VIDEO_MB * 2));
+}
+
+