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-rw-r--r--payloads/libpayload/arch/arm64/mmu.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/payloads/libpayload/arch/arm64/mmu.c b/payloads/libpayload/arch/arm64/mmu.c
index 41fb10b54..86d9fc5ee 100644
--- a/payloads/libpayload/arch/arm64/mmu.c
+++ b/payloads/libpayload/arch/arm64/mmu.c
@@ -675,6 +675,7 @@ static void mmu_extract_ranges(struct memrange *cb_ranges,
static void mmu_add_fb_range(struct mmu_ranges *mmu_ranges)
{
struct mmu_memrange *fb_range;
+ static struct cb_framebuffer modified_fb;
struct cb_framebuffer *framebuffer = lib_sysinfo.framebuffer;
uint32_t fb_size;
@@ -695,8 +696,16 @@ static void mmu_add_fb_range(struct mmu_ranges *mmu_ranges)
if (fb_range == NULL)
mmu_error();
- /* Set framebuffer address */
- framebuffer->physical_address = fb_range->base;
+ /*
+ * Set framebuffer address. However, one needs to use a freshly
+ * allocated framebuffer structure because the one in the coreboot
+ * table is part of a checksum calculation. Therefore, one cannot
+ * modify a field without recomputing the necessary checksum
+ * calcuation.
+ */
+ modified_fb = *framebuffer;
+ modified_fb.physical_address = fb_range->base;
+ lib_sysinfo.framebuffer = &modified_fb;
}
/*