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Add a framebuffer test when EFI debug is enabled.

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This commit is contained in:
Martin Whitaker
2022-04-13 14:30:52 +01:00
parent 6e9bdce92d
commit 31f06ea7c8
1 changed files with 48 additions and 0 deletions
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48
boot/efisetup.c
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@@ -124,6 +124,48 @@ static void wait_for_key(void)
while (efi_call_proto(efi_table_attr(sys_table, con_in), read_key_stroke, &input_key) == EFI_NOT_READY) {}
}
static void test_frame_buffer(screen_info_t *si)
{
uint32_t r_value = 0xffffffff >> (32 - si->red_size);
uint32_t g_value = 0;
uint32_t b_value = 0;
int pixel_size = (si->lfb_depth / 8);
union {
uint8_t byte[4];
uint32_t word;
} pixel_value;
pixel_value.word = (r_value << si->red_pos) | (g_value << si->green_pos) | (b_value << si->blue_pos);
uintptr_t lfb_base = si->lfb_base;
#ifdef __x86_64__
if (LFB_CAPABILITY_64BIT_BASE & si->capabilities) {
lfb_base |= (uintptr_t)si->ext_lfb_base << 32;
}
#endif
uint8_t *lfb_row = (uint8_t *)lfb_base;
for (int y = 0; y < 8; y++) {
for (int x = 0; x < si->lfb_width; x++) {
for (int b = 0; b < pixel_size; b++) {
lfb_row[x * pixel_size + b] = pixel_value.byte[b];
}
}
lfb_row += si->lfb_linelength;
}
lfb_row += (si->lfb_height - 16) * si->lfb_linelength;
for (int y = 0; y < 8; y++) {
for (int x = 0; x < si->lfb_width; x++) {
for (int b = 0; b < pixel_size; b++) {
lfb_row[x * pixel_size + b] = pixel_value.byte[b];
}
}
lfb_row += si->lfb_linelength;
}
}
#endif
static efi_memory_desc_t *get_memory_desc(uintptr_t map_addr, size_t desc_size, size_t n)
@@ -449,6 +491,12 @@ static efi_status_t set_screen_info_from_gop(screen_info_t *si, efi_handle_t *ha
return status;
}
#if DEBUG
test_frame_buffer(si);
print_string("Press any key to continue...\n");
wait_for_key();
#endif
return EFI_SUCCESS;
}