Revision 99
complete restructure
| lab5/graphics.c | ||
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| 7 | 7 |
#include <stdio.h> |
| 8 | 8 |
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| 9 | 9 |
static void *video_mem; /** @brief Frame-buffer VM address */ |
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static vbe_mode_info_t vbe_mem_info; |
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//static mmap_t mem_map;
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//static vbe_mode_info_t vbe_mem_info;
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static mmap_t mem_map; |
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int (set_graphics_mode)(uint16_t mode) {
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int r; |
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int (get_permission)(unsigned int base_addr, unsigned int size) {
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struct minix_mem_range mmr; |
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mmr.mr_base = 0x0; |
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mmr.mr_limit = 0xFFFFF; |
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mmr.mr_base = base_addr; |
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mmr.mr_limit = base_addr + size; |
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return sys_privctl(SELF, SYS_PRIV_ADD_MEM, &mmr); |
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} |
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| 18 | 19 |
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struct reg86 reg_86; |
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int (get_permissions_first_mbyte)(void) {
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return get_permission(MBYTE_BASE, MBYTE_SIZE); |
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} |
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if ((r = sys_privctl(SELF, SYS_PRIV_ADD_MEM, &mmr)))
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panic("sys_privctl (ADD MEM) failed: %d\n", r);
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int (vbe_get_mode_information)(uint16_t mode, vbe_mode_info_t *vmi_p) {
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memset(vmi_p, 0, sizeof(vbe_mode_info_t)); // reset values
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struct reg86 reg_86; |
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memset(®_86, 0, sizeof(reg_86)); // reset struct |
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memset(&vbe_mem_info, 0, sizeof(vbe_mode_info_t)); // clear mem_info to initialize it
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vbe_mode_info_t *virtual_addr = lm_alloc(sizeof(vbe_mode_info_t), &mem_map);
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if (vbe_get_mode_info(mode, &vbe_mem_info)) {
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printf("vbe_get_mode_info: Failed to get VBE Mode Info for mode %x\n", mode);
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return LCF_ERROR; |
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reg_86.intno = VC_BIOS_SERV; |
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reg_86.ah = VBE_CALL; |
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reg_86.al = VBE_MD_INFO; |
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reg_86.cx = mode; |
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reg_86.es = PB2BASE(mem_map.phys); |
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reg_86.di = PB2OFF(mem_map.phys); |
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// BIOS CALL |
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if (sys_int86(®_86)) {
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printf("%s: sys_int86 failed\n", __func__);
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if (free_memory()) {
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printf("%s: lm_free failed\n", __func__);
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return LCF_ERROR; |
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} |
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return BIOS_CALL_ERROR; |
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} |
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unsigned int vram_base = vbe_mem_info.PhysBasePtr; |
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unsigned int vram_size = vbe_mem_info.XResolution * vbe_mem_info.YResolution * (vbe_mem_info.BitsPerPixel >> 3); |
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// Allow memory mapping
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mmr.mr_base = vram_base;
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mmr.mr_limit = vram_base + vram_size;
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vmi_p = memcpy((void*)vmi_p, (void*)virtual_addr, mem_map.size);
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return SUCCESS;
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}
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if ((r = sys_privctl(SELF, SYS_PRIV_ADD_MEM, &mmr))) |
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panic("sys_privctl (ADD MEM) failed: %d\n", r);
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int (map_vram)(unsigned int vram_base, unsigned int vram_size) {
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int r; |
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if ((r = get_permission(vram_base, vram_size))) |
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panic("%s: sys_privctl (ADD MEM) failed: %d\n", __func__, r);
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// Map memory
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video_mem = vm_map_phys(SELF, (void *)vram_base, vram_size);
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video_mem = vm_map_phys(SELF, (void *)mmr.mr_base, vram_size); |
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if (video_mem == MAP_FAILED) |
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panic("Error: couldn't map video memory.");
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panic("%s: couldn't map video memory.", __func__);
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return SUCCESS; |
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} |
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int (free_memory)(void) {
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return lm_free(&mem_map); |
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} |
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int (set_graphics_mode)(uint16_t mode) {
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struct reg86 reg_86; |
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memset(®_86, 0, sizeof(reg_86)); // reset struct |
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// Set Reg86 |
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reg_86.intno = VC_BIOS_SERV; |
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reg_86.ah = VBE_CALL; |
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reg_86.al = SET_VBE_MD; |
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reg_86.bx = mode | LINEAR_FRAME_BUFFER_MD; |
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// BIOS CALL |
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if (sys_int86(®_86)) {
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printf("%s: sys_int86 failed\n", __func__);
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return BIOS_CALL_ERROR; |
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} |
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return SUCCESS; |
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} |
| lab5/graphics.h | ||
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| 1 | 1 |
#ifndef GRAPHICS_H_INCLUDED |
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#define GRAPHICS_H_INCLUDED |
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#include <lcom/lcf.h> |
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#include <stdint.h> |
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int (get_permission)(unsigned int base_addr, unsigned int size); |
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int (get_permissions_first_mbyte)(void); |
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int (vbe_get_mode_information)(uint16_t mode, vbe_mode_info_t *vmi_p); |
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int (map_vram)(unsigned int vram_base, unsigned int vram_size); |
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int (free_memory)(void); |
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/** |
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* @brief |
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* @param mode |
| lab5/graphics_macros.h | ||
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| 4 | 4 |
#define VC_BIOS_SERV 0x10 /** @brief TODO */ |
| 5 | 5 |
#define VBE_CALL 0x4F /** @brief TODO */ |
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#define MBYTE_BASE 0x0 |
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#define MBYTE_SIZE 0xFFFFF |
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|
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// Graphics Functions |
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#define VBE_CTRL_INFO 0x00 /** @brief Get VBE Controller Information */ |
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#define VBE_MD_INFO 0x01 /** @brief Get VBE Mode Information */ |
| lab5/lab5.c | ||
|---|---|---|
| 35 | 35 |
} |
| 36 | 36 |
|
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int(video_test_init)(uint16_t mode, uint8_t delay) {
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int r; |
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if ((r = get_permissions_first_mbyte())) |
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panic("%s: sys_privctl (ADD MEM) failed: %d\n", __func__, r);
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set_graphics_mode(mode); |
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if (set_graphics_mode(mode)) {
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printf("%s: failed to set graphic mode %x.\n", __func__, mode);
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if (vg_exit()) |
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printf("%s: vg_exit failed to exit to text mode.\n", __func__);
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return 1; |
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}; |
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vbe_mode_info_t vbe_mem_info; |
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if (vbe_get_mode_information(mode, &vbe_mem_info)) {
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printf("%s: failed to get information for mode %x.\n", __func__, mode);
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if (vg_exit()) |
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printf("%s: vg_exit failed to exit to text mode.\n", __func__);
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return 1; |
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} |
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unsigned int vram_base = vbe_mem_info.PhysBasePtr; |
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unsigned int vram_size = vbe_mem_info.XResolution * vbe_mem_info.YResolution * ((vbe_mem_info.BitsPerPixel + 7) >> 3); |
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map_vram(vram_base, vram_size); // if function fails it aborts program |
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tickdelay(micros_to_ticks(delay*1e6)); |
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vg_exit(); |
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if (vg_exit()) {
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printf("%s: vg_exit failed to exit to text mode.\n", __func__);
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if (free_memory()) |
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printf("%s: lm_free failed\n", __func__);
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return 1; |
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} |
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if (free_memory()) {
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printf("%s: lm_free failed\n", __func__);
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return 1; |
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} |
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return 0; |
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} |
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