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libpayload/arm64: Mark existing framebuffer as DMAable 

If a framebuffer is already configured by coreboot, libpayload's
MMU tables didn't mark its memory DMAable (unlike when libpayload
set up its own framebuffer memory).

BRANCH=none
BUG=chrome-os-partner:52826
TEST=depthcharge's recovery screen is not corrupted anymore on kevin

Change-Id: I228a861b3fdcf1298a3cfa0a054214c78ed55e70
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 889e8358a0f2f504abd9910549aa68f3992bb4e8
Original-Change-Id: I7ba79151ccc1eb605f82e1869a74b539a6be5e99
Original-Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/341092
Reviewed-on: https://review.coreboot.org/14685
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Patrick Georgi 2016-04-28 06:03:57 +02:00 committed by Patrick Georgi
parent 934c683933
commit 5dc87fe470
1 changed files with 12 additions and 6 deletions
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18
payloads/libpayload/arch/arm64/mmu.c
View File

@ -655,18 +655,24 @@ static void mmu_add_fb_range(struct mmu_ranges *mmu_ranges)
struct cb_framebuffer *framebuffer = lib_sysinfo.framebuffer; struct cb_framebuffer *framebuffer = lib_sysinfo.framebuffer;
uint32_t fb_size; uint32_t fb_size;
/* /* Check whether framebuffer is needed */
* Check whether framebuffer is needed
* or framebuffer address has been set already
*/
if (framebuffer == NULL) if (framebuffer == NULL)
return; return;
if (framebuffer->physical_address)
return;
fb_size = framebuffer->bytes_per_line * framebuffer->y_resolution; fb_size = framebuffer->bytes_per_line * framebuffer->y_resolution;
if (!fb_size) if (!fb_size)
return; return;
/* framebuffer address has been set already, so just add it as DMA */
if (framebuffer->physical_address) {
if (mmu_add_memrange(mmu_ranges,
framebuffer->physical_address,
fb_size,
TYPE_DMA_MEM) == NULL)
mmu_error();
return;
}
/* Allocate framebuffer */ /* Allocate framebuffer */
fb_range = _mmu_add_fb_range(fb_size, mmu_ranges); fb_range = _mmu_add_fb_range(fb_size, mmu_ranges);
if (fb_range == NULL) if (fb_range == NULL)