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-rw-r--r--drivers/video/sunxi_display.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/video/sunxi_display.c b/drivers/video/sunxi_display.c
index f5f24fc..cd5963a 100644
--- a/drivers/video/sunxi_display.c
+++ b/drivers/video/sunxi_display.c
@@ -1060,6 +1060,11 @@ static const char *sunxi_get_mon_desc(enum sunxi_monitor monitor)
return NULL; /* never reached */
}
+ulong board_get_usable_ram_top(ulong total_size)
+{
+ return gd->ram_top - CONFIG_SUNXI_MAX_FB_SIZE;
+}
+
void *video_hw_init(void)
{
static GraphicDevice *graphic_device = &sunxi_display.graphic_device;
@@ -1076,7 +1081,7 @@ void *video_hw_init(void)
memset(&sunxi_display, 0, sizeof(struct sunxi_display));
printf("Reserved %dkB of RAM for Framebuffer.\n",
- CONFIG_SUNXI_FB_SIZE >> 10);
+ CONFIG_SUNXI_MAX_FB_SIZE >> 10);
gd->fb_base = gd->ram_top;
video_get_ctfb_res_modes(RES_MODE_1024x768, 24, &mode,
@@ -1194,6 +1199,7 @@ int sunxi_simplefb_setup(void *blob)
{
static GraphicDevice *graphic_device = &sunxi_display.graphic_device;
int offset, ret;
+ u64 start, size;
const char *pipeline = NULL;
#ifdef CONFIG_MACH_SUN4I
@@ -1237,6 +1243,20 @@ int sunxi_simplefb_setup(void *blob)
return 0; /* Keep older kernels working */
}
+ /*
+ * Do not report the framebuffer as free RAM to the OS, note we cannot
+ * use fdt_add_mem_rsv() here, because then it is still seen as RAM,
+ * and e.g. Linux refuses to iomap RAM on ARM, see:
+ * linux/arch/arm/mm/ioremap.c around line 301.
+ */
+ start = gd->bd->bi_dram[0].start;
+ size = gd->bd->bi_dram[0].size - CONFIG_SUNXI_MAX_FB_SIZE;
+ ret = fdt_fixup_memory_banks(blob, &start, &size, 1);
+ if (ret) {
+ eprintf("Cannot setup simplefb: Error reserving memory\n");
+ return ret;
+ }
+
ret = fdt_setup_simplefb_node(blob, offset, gd->fb_base,
graphic_device->winSizeX, graphic_device->winSizeY,
graphic_device->winSizeX * graphic_device->gdfBytesPP,