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loader.efi: to preserve heap space, use AllocatePages() for shadow_fb

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shadow FB size could be rather large and depends on resolution,
instead of using heap, allocate dedicated space outside of heap.

Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D33600
MFC after: 2 weeks
This commit is contained in:
Toomas Soome 2021-12-17 15:10:05 +02:00
parent d34632a235
commit 221376db0c
2 changed files with 12 additions and 2 deletions
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1
stand/common/gfx_fb.h
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@ -217,6 +217,7 @@ typedef struct teken_gfx {
struct vt_font tg_font;
struct gen_fb tg_fb;
uint32_t *tg_shadow_fb; /* units of 4 bytes */
size_t tg_shadow_sz; /* units of pages */
teken_funcs_t *tg_functions;
void *tg_private;
} teken_gfx_t;

13
stand/efi/loader/framebuffer.c
View File

@ -634,9 +634,18 @@ efi_find_framebuffer(teken_gfx_t *gfx_state)
gfx_state->tg_fb.fb_bpp = fls(efifb.fb_mask_red | efifb.fb_mask_green |
efifb.fb_mask_blue | efifb.fb_mask_reserved);
free(gfx_state->tg_shadow_fb);
gfx_state->tg_shadow_fb = malloc(efifb.fb_height * efifb.fb_width *
if (gfx_state->tg_shadow_fb != NULL)
BS->FreePages((EFI_PHYSICAL_ADDRESS)gfx_state->tg_shadow_fb,
gfx_state->tg_shadow_sz);
gfx_state->tg_shadow_sz =
EFI_SIZE_TO_PAGES(efifb.fb_height * efifb.fb_width *
sizeof(EFI_GRAPHICS_OUTPUT_BLT_PIXEL));
status = BS->AllocatePages(AllocateMaxAddress, EfiLoaderData,
gfx_state->tg_shadow_sz,
(EFI_PHYSICAL_ADDRESS *)&gfx_state->tg_shadow_fb);
if (status != EFI_SUCCESS)
gfx_state->tg_shadow_fb = NULL;
return (0);
}