root / lab5 / graphics.c @ 99
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1 | 95 | up20180655 | #include "graphics.h" |
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2 | #include "graphics_macros.h" |
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3 | #include "errors.h" |
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4 | |||
5 | #include <lcom/lcf.h> |
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6 | |||
7 | #include <stdio.h> |
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8 | |||
9 | static void *video_mem; /** @brief Frame-buffer VM address */ |
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10 | 99 | up20180655 | //static vbe_mode_info_t vbe_mem_info;
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11 | static mmap_t mem_map;
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12 | 95 | up20180655 | |
13 | 99 | up20180655 | int (get_permission)(unsigned int base_addr, unsigned int size) { |
14 | 95 | up20180655 | struct minix_mem_range mmr;
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15 | 99 | up20180655 | mmr.mr_base = base_addr; |
16 | mmr.mr_limit = base_addr + size; |
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17 | return sys_privctl(SELF, SYS_PRIV_ADD_MEM, &mmr);
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18 | } |
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19 | 95 | up20180655 | |
20 | 99 | up20180655 | int (get_permissions_first_mbyte)(void) { |
21 | return get_permission(MBYTE_BASE, MBYTE_SIZE);
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22 | } |
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23 | 95 | up20180655 | |
24 | 99 | up20180655 | int (vbe_get_mode_information)(uint16_t mode, vbe_mode_info_t *vmi_p) {
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25 | memset(vmi_p, 0, sizeof(vbe_mode_info_t)); // reset values |
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26 | 95 | up20180655 | |
27 | 99 | up20180655 | struct reg86 reg_86;
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28 | memset(®_86, 0, sizeof(reg_86)); // reset struct |
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29 | 98 | up20180655 | |
30 | 99 | up20180655 | vbe_mode_info_t *virtual_addr = lm_alloc(sizeof(vbe_mode_info_t), &mem_map);
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31 | 98 | up20180655 | |
32 | 99 | up20180655 | reg_86.intno = VC_BIOS_SERV; |
33 | reg_86.ah = VBE_CALL; |
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34 | reg_86.al = VBE_MD_INFO; |
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35 | reg_86.cx = mode; |
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36 | reg_86.es = PB2BASE(mem_map.phys); |
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37 | reg_86.di = PB2OFF(mem_map.phys); |
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38 | // BIOS CALL
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39 | if (sys_int86(®_86)) {
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40 | printf("%s: sys_int86 failed\n", __func__);
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41 | if (free_memory()) {
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42 | printf("%s: lm_free failed\n", __func__);
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43 | return LCF_ERROR;
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44 | } |
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45 | return BIOS_CALL_ERROR;
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46 | 95 | up20180655 | } |
47 | |||
48 | 99 | up20180655 | vmi_p = memcpy((void*)vmi_p, (void*)virtual_addr, mem_map.size); |
49 | return SUCCESS;
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50 | } |
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51 | 95 | up20180655 | |
52 | 99 | up20180655 | int (map_vram)(unsigned int vram_base, unsigned int vram_size) { |
53 | int r;
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54 | if ((r = get_permission(vram_base, vram_size)))
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55 | panic("%s: sys_privctl (ADD MEM) failed: %d\n", __func__, r);
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56 | 95 | up20180655 | |
57 | 99 | up20180655 | video_mem = vm_map_phys(SELF, (void *)vram_base, vram_size);
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58 | 95 | up20180655 | |
59 | if (video_mem == MAP_FAILED)
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60 | 99 | up20180655 | panic("%s: couldn't map video memory.", __func__);
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61 | 95 | up20180655 | |
62 | 99 | up20180655 | return SUCCESS;
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63 | } |
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64 | |||
65 | int (free_memory)(void) { |
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66 | return lm_free(&mem_map);
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67 | } |
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68 | |||
69 | int (set_graphics_mode)(uint16_t mode) {
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70 | struct reg86 reg_86;
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71 | |||
72 | 98 | up20180655 | memset(®_86, 0, sizeof(reg_86)); // reset struct |
73 | 96 | up20180655 | |
74 | 99 | up20180655 | // Set Reg86
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75 | 98 | up20180655 | reg_86.intno = VC_BIOS_SERV; |
76 | reg_86.ah = VBE_CALL; |
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77 | reg_86.al = SET_VBE_MD; |
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78 | reg_86.bx = mode | LINEAR_FRAME_BUFFER_MD; |
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79 | 96 | up20180655 | |
80 | 98 | up20180655 | // BIOS CALL
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81 | if (sys_int86(®_86)) {
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82 | printf("%s: sys_int86 failed\n", __func__);
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83 | return BIOS_CALL_ERROR;
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84 | } |
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85 | 99 | up20180655 | |
86 | 95 | up20180655 | return SUCCESS;
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87 | } |