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add some indication of video driver status

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This commit is contained in:
Kevin Lange 2012-12-02 22:41:40 -08:00
parent 3a45200d3d
commit 3b316b0603
1 changed files with 12 additions and 1 deletions
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13
kernel/video/lfb.c
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@ -108,6 +108,12 @@ void graphics_install_preset(uint16_t w, uint16_t h) {
/* XXX: Massive hack */
uint32_t * herp = (uint32_t *)0xA0000;
herp[0] = 0xA5ADFACE;
herp[1] = 0xFAF42943;
for (int i = 2; i < 1000; i += 2) {
herp[i] = 0xFF00FF00;
herp[i+1] = 0x00FF00FF;
}
for (uintptr_t fb_offset = 0xE0000000; fb_offset < 0xFF000000; fb_offset += 0x01000000) {
/* Enable the higher memory */
@ -117,13 +123,18 @@ void graphics_install_preset(uint16_t w, uint16_t h) {
/* Go find it */
for (uintptr_t x = fb_offset; x < fb_offset + 0xFF0000; x += 0x1000) {
if (((uintptr_t *)x)[0] == 0xA5ADFACE) {
if (((uintptr_t *)x)[0] == 0xA5ADFACE && ((uintptr_t *)x)[1] == 0xFAF42943) {
lfb_vid_memory = (uint8_t *)x;
goto mem_found;
}
}
}
for (int i = 2; i < 1000; i += 2) {
herp[i] = 0xFF00FF00;
herp[i+1] = 0xFF00FF00;
}
debug_print(WARNING, "Failed to locate video memory. This could end poorly.");
mem_found: