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-rw-r--r--drivers/video/geode/display_gx.c18
-rw-r--r--drivers/video/geode/lxfb_ops.c16
-rw-r--r--include/asm-x86/geode.h2
3 files changed, 35 insertions, 1 deletions
diff --git a/drivers/video/geode/display_gx.c b/drivers/video/geode/display_gx.c
index 1e82ecc367d..e759895bf3d 100644
--- a/drivers/video/geode/display_gx.c
+++ b/drivers/video/geode/display_gx.c
@@ -25,7 +25,23 @@ unsigned int gx_frame_buffer_size(void)
{
unsigned int val;
- /* FB size is reported by a virtual register */
+ if (!geode_has_vsa2()) {
+ uint32_t hi, lo;
+
+ /* The number of pages is (PMAX - PMIN)+1 */
+ rdmsr(MSR_GLIU_P2D_RO0, lo, hi);
+
+ /* PMAX */
+ val = ((hi & 0xff) << 12) | ((lo & 0xfff00000) >> 20);
+ /* PMIN */
+ val -= (lo & 0x000fffff);
+ val += 1;
+
+ /* The page size is 4k */
+ return (val << 12);
+ }
+
+ /* FB size can be obtained from the VSA II */
/* Virtual register class = 0x02 */
/* VG_MEM_SIZE(512Kb units) = 0x00 */
diff --git a/drivers/video/geode/lxfb_ops.c b/drivers/video/geode/lxfb_ops.c
index e42e12489f6..cd9d4cc2695 100644
--- a/drivers/video/geode/lxfb_ops.c
+++ b/drivers/video/geode/lxfb_ops.c
@@ -329,6 +329,22 @@ unsigned int lx_framebuffer_size(void)
{
unsigned int val;
+ if (!geode_has_vsa2()) {
+ uint32_t hi, lo;
+
+ /* The number of pages is (PMAX - PMIN)+1 */
+ rdmsr(MSR_GLIU_P2D_RO0, lo, hi);
+
+ /* PMAX */
+ val = ((hi & 0xff) << 12) | ((lo & 0xfff00000) >> 20);
+ /* PMIN */
+ val -= (lo & 0x000fffff);
+ val += 1;
+
+ /* The page size is 4k */
+ return (val << 12);
+ }
+
/* The frame buffer size is reported by a VSM in VSA II */
/* Virtual Register Class = 0x02 */
/* VG_MEM_SIZE (1MB units) = 0x00 */
diff --git a/include/asm-x86/geode.h b/include/asm-x86/geode.h
index 4fb2f62e277..7154dc4de95 100644
--- a/include/asm-x86/geode.h
+++ b/include/asm-x86/geode.h
@@ -30,6 +30,8 @@ extern int geode_get_dev_base(unsigned int dev);
/* MSRS */
+#define MSR_GLIU_P2D_RO0 0x10000029
+
#define MSR_LX_GLD_MSR_CONFIG 0x48002001
#define MSR_LX_MSR_PADSEL 0x48002011 /* NOT 0x48000011; the data
* sheet has the wrong value */