diff options
Diffstat (limited to 'src/arch/amd64/fb.c')
| -rw-r--r-- | src/arch/amd64/fb.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/src/arch/amd64/fb.c b/src/arch/amd64/fb.c index ab15dd6..8484f29 100644 --- a/src/arch/amd64/fb.c +++ b/src/arch/amd64/fb.c @@ -3,6 +3,7 @@ #include <serial.h> #include <stdint.h> #include <panic.h> +#include <pci.h> #include "bindings.h" @@ -25,6 +26,9 @@ #define DATA_LFB_ENABLE 0x40 #define DATA_NO_CLEAR_MEM 0x80 +#define BOCHS_PCI_VENDOR 0x1234 +#define BOCHS_PCI_DEVICE 0x1111 + static void write(uint16_t index, uint16_t data) { outw(INDEX, index); outw(DATA, data); @@ -60,5 +64,27 @@ int fb_init(uint16_t width, uint16_t height) { if (!is_available()) panic("bochs framebuffer not avaliable"); - return 0; + struct pci_device bochs = {0}; + bool found = pci_findby_id(&bochs, BOCHS_PCI_DEVICE, BOCHS_PCI_VENDOR, NULL); + if (!found) + panic("bochs pci device not avaliable"); + + uint32_t bar0 = pci_rcfg_d(bochs, PCI_BAR0_D); + uint32_t *fb = (uint32_t*) (uintptr_t) bar0; + fb = mmap(fb, width * height * 4); + + for (uint16_t y = 0; y < height; y++) { + for (uint16_t x = 0; x < width; x++) { + double dx = x / (double) width, + dy = y / (double) height, + dz = (2 - dx - dy) / 2; + uint32_t r = (uint32_t)(dx * 255), + g = (uint32_t)(dy * 255), + b = (uint32_t)(dz * 255); + fb[x + y * width] = (b << 0) | (g << 8) | (r << 16); + } + } + + + return 0; } |