1 | /* |
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2 | * Copyright 2011-2014 Intel Corporation - All Rights Reserved |
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3 | */ |
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4 | |
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5 | #include <syslinux/linux.h> |
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6 | #include "efi.h" |
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7 | #include <string.h> |
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8 | |
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9 | extern EFI_GUID GraphicsOutputProtocol; |
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10 | |
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11 | static uint32_t console_default_attribute; |
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12 | static bool console_default_cursor; |
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13 | |
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14 | /* |
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15 | * We want to restore the console state when we boot a kernel or return |
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16 | * to the firmware. |
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17 | */ |
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18 | void efi_console_save(void) |
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19 | { |
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20 | SIMPLE_TEXT_OUTPUT_INTERFACE *out = ST->ConOut; |
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21 | SIMPLE_TEXT_OUTPUT_MODE *mode = out->Mode; |
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22 | |
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23 | console_default_attribute = mode->Attribute; |
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24 | console_default_cursor = mode->CursorVisible; |
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25 | } |
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26 | |
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27 | void efi_console_restore(void) |
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28 | { |
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29 | SIMPLE_TEXT_OUTPUT_INTERFACE *out = ST->ConOut; |
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30 | |
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31 | uefi_call_wrapper(out->SetAttribute, 2, out, console_default_attribute); |
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32 | uefi_call_wrapper(out->EnableCursor, 2, out, console_default_cursor); |
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33 | } |
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34 | |
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35 | __export void writechr(char data) |
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36 | { |
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37 | efi_write_char(data, 0); |
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38 | } |
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39 | |
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40 | static inline EFI_STATUS open_protocol(EFI_HANDLE handle, EFI_GUID *protocol, |
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41 | void **interface, EFI_HANDLE agent, |
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42 | EFI_HANDLE controller, UINT32 attributes) |
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43 | { |
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44 | return uefi_call_wrapper(BS->OpenProtocol, 6, handle, protocol, |
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45 | interface, agent, controller, attributes); |
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46 | } |
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47 | |
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48 | static inline EFI_STATUS |
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49 | gop_query_mode(EFI_GRAPHICS_OUTPUT_PROTOCOL *gop, UINTN *size, |
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50 | EFI_GRAPHICS_OUTPUT_MODE_INFORMATION **info) |
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51 | { |
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52 | return uefi_call_wrapper(gop->QueryMode, 4, gop, |
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53 | gop->Mode->Mode, size, info); |
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54 | } |
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55 | |
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56 | static inline void bit_mask(uint32_t mask, uint8_t *pos, uint8_t *size) |
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57 | { |
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58 | *pos = 0; |
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59 | *size = 0; |
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60 | |
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61 | if (mask) { |
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62 | while (!(mask & 0x1)) { |
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63 | mask >>= 1; |
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64 | (*pos)++; |
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65 | } |
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66 | |
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67 | while (mask & 0x1) { |
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68 | mask >>= 1; |
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69 | (*size)++; |
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70 | } |
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71 | } |
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72 | } |
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73 | |
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74 | static int setup_gop(struct screen_info *si) |
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75 | { |
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76 | EFI_HANDLE *handles = NULL; |
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77 | EFI_STATUS status; |
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78 | EFI_GRAPHICS_OUTPUT_PROTOCOL *gop, *found; |
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79 | EFI_GRAPHICS_PIXEL_FORMAT pixel_fmt; |
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80 | EFI_PIXEL_BITMASK pixel_info; |
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81 | uint32_t pixel_scanline; |
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82 | UINTN i, nr_handles; |
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83 | UINTN size; |
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84 | uint16_t lfb_width, lfb_height; |
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85 | uint32_t lfb_base, lfb_size; |
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86 | int err = 0; |
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87 | void **gop_handle = NULL; |
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88 | |
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89 | size = 0; |
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90 | status = uefi_call_wrapper(BS->LocateHandle, 5, ByProtocol, &GraphicsOutputProtocol, |
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91 | NULL, &size, gop_handle); |
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92 | /* LibLocateHandle handle already returns the number of handles. |
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93 | * There is no need to divide by sizeof(EFI_HANDLE) |
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94 | */ |
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95 | status = LibLocateHandle(ByProtocol, &GraphicsOutputProtocol, |
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96 | NULL, &nr_handles, &handles); |
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97 | if (status == EFI_BUFFER_TOO_SMALL) { |
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98 | |
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99 | handles = AllocatePool(nr_handles); |
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100 | if (!handles) |
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101 | return 0; |
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102 | |
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103 | status = LibLocateHandle(ByProtocol, &GraphicsOutputProtocol, |
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104 | NULL, &nr_handles, &handles); |
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105 | } |
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106 | if (status != EFI_SUCCESS) |
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107 | goto out; |
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108 | |
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109 | found = NULL; |
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110 | for (i = 0; i < nr_handles; i++) { |
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111 | EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info; |
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112 | EFI_PCI_IO *pciio = NULL; |
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113 | EFI_HANDLE *h = handles[i]; |
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114 | |
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115 | status = uefi_call_wrapper(BS->HandleProtocol, 3, h, |
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116 | &GraphicsOutputProtocol, (void **)&gop); |
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117 | if (status != EFI_SUCCESS) |
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118 | continue; |
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119 | uefi_call_wrapper(BS->HandleProtocol, 3, h, |
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120 | &PciIoProtocol, (void **)&pciio); |
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121 | status = gop_query_mode(gop, &size, &info); |
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122 | if (status == EFI_SUCCESS && (!found || pciio)) { |
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123 | lfb_width = info->HorizontalResolution; |
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124 | lfb_height = info->VerticalResolution; |
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125 | lfb_base = gop->Mode->FrameBufferBase; |
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126 | lfb_size = gop->Mode->FrameBufferSize; |
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127 | pixel_fmt = info->PixelFormat; |
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128 | pixel_info = info->PixelInformation; |
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129 | pixel_scanline = info->PixelsPerScanLine; |
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130 | if (pciio) |
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131 | break; |
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132 | found = gop; |
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133 | } |
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134 | } |
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135 | |
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136 | if (!found) |
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137 | goto out; |
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138 | |
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139 | err = 1; |
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140 | |
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141 | dprintf("setup_screen: set up screen parameters for EFI GOP\n"); |
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142 | si->orig_video_isVGA = 0x70; /* EFI framebuffer */ |
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143 | |
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144 | si->lfb_base = lfb_base; |
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145 | si->lfb_size = lfb_size; |
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146 | si->lfb_width = lfb_width; |
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147 | si->lfb_height = lfb_height; |
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148 | si->pages = 1; |
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149 | |
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150 | dprintf("setup_screen: lfb_base 0x%x lfb_size %d lfb_width %d lfb_height %d\n", lfb_base, lfb_size, lfb_width, lfb_height); |
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151 | switch (pixel_fmt) { |
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152 | case PixelRedGreenBlueReserved8BitPerColor: |
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153 | si->lfb_depth = 32; |
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154 | si->lfb_linelength = pixel_scanline * 4; |
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155 | si->red_size = 8; |
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156 | si->red_pos = 0; |
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157 | si->green_size = 8; |
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158 | si->green_pos = 8; |
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159 | si->blue_size = 8; |
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160 | si->blue_pos = 16; |
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161 | si->rsvd_size = 8; |
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162 | si->rsvd_pos = 24; |
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163 | break; |
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164 | case PixelBlueGreenRedReserved8BitPerColor: |
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165 | si->lfb_depth = 32; |
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166 | si->lfb_linelength = pixel_scanline * 4; |
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167 | si->red_size = 8; |
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168 | si->red_pos = 16; |
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169 | si->green_size = 8; |
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170 | si->green_pos = 8; |
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171 | si->blue_size = 8; |
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172 | si->blue_pos = 0; |
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173 | si->rsvd_size = 8; |
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174 | si->rsvd_pos = 24; |
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175 | break; |
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176 | case PixelBitMask: |
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177 | bit_mask(pixel_info.RedMask, &si->red_pos, |
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178 | &si->red_size); |
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179 | bit_mask(pixel_info.GreenMask, &si->green_pos, |
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180 | &si->green_size); |
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181 | bit_mask(pixel_info.BlueMask, &si->blue_pos, |
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182 | &si->blue_size); |
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183 | bit_mask(pixel_info.ReservedMask, &si->rsvd_pos, |
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184 | &si->rsvd_size); |
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185 | si->lfb_depth = si->red_size + si->green_size + |
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186 | si->blue_size + si->rsvd_size; |
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187 | si->lfb_linelength = (pixel_scanline * si->lfb_depth) / 8; |
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188 | break; |
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189 | default: |
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190 | si->lfb_depth = 4;; |
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191 | si->lfb_linelength = si->lfb_width / 2; |
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192 | si->red_size = 0; |
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193 | si->red_pos = 0; |
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194 | si->green_size = 0; |
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195 | si->green_pos = 0; |
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196 | si->blue_size = 0; |
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197 | si->blue_pos = 0; |
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198 | si->rsvd_size = 0; |
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199 | si->rsvd_pos = 0; |
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200 | break; |
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201 | } |
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202 | dprintf("setup_screen: depth %d line %d rpos %d rsize %d gpos %d gsize %d bpos %d bsize %d rsvpos %d rsvsize %d\n", |
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203 | si->lfb_depth, si->lfb_linelength, |
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204 | si->red_pos, si->red_size, |
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205 | si->green_pos, si->green_size, |
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206 | si->blue_pos, si->blue_size, |
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207 | si->blue_pos, si->blue_size, |
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208 | si->rsvd_pos, si->rsvd_size); |
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209 | |
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210 | out: |
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211 | if (handles) FreePool(handles); |
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212 | |
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213 | return err; |
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214 | } |
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215 | |
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216 | #define EFI_UGA_PROTOCOL_GUID \ |
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217 | { \ |
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218 | 0x982c298b, 0xf4fa, 0x41cb, {0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39 } \ |
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219 | } |
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220 | |
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221 | typedef struct _EFI_UGA_DRAW_PROTOCOL EFI_UGA_DRAW_PROTOCOL; |
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222 | |
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223 | typedef |
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224 | EFI_STATUS |
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225 | (EFIAPI *EFI_UGA_DRAW_PROTOCOL_GET_MODE) ( |
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226 | IN EFI_UGA_DRAW_PROTOCOL *This, |
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227 | OUT UINT32 *Width, |
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228 | OUT UINT32 *Height, |
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229 | OUT UINT32 *Depth, |
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230 | OUT UINT32 *Refresh |
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231 | ) |
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232 | ; |
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233 | |
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234 | struct _EFI_UGA_DRAW_PROTOCOL { |
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235 | EFI_UGA_DRAW_PROTOCOL_GET_MODE GetMode; |
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236 | void *SetMode; |
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237 | void *Blt; |
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238 | }; |
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239 | |
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240 | static int setup_uga(struct screen_info *si) |
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241 | { |
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242 | EFI_UGA_DRAW_PROTOCOL *uga, *first; |
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243 | EFI_GUID UgaProtocol = EFI_UGA_PROTOCOL_GUID; |
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244 | UINT32 width, height; |
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245 | EFI_STATUS status; |
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246 | EFI_HANDLE *handles; |
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247 | UINTN i, nr_handles; |
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248 | int rv = 0; |
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249 | |
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250 | status = LibLocateHandle(ByProtocol, &UgaProtocol, |
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251 | NULL, &nr_handles, &handles); |
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252 | if (status != EFI_SUCCESS) |
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253 | return rv; |
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254 | |
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255 | for (i = 0; i < nr_handles; i++) { |
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256 | EFI_PCI_IO *pciio = NULL; |
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257 | EFI_HANDLE *handle = handles[i]; |
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258 | UINT32 w, h, depth, refresh; |
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259 | |
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260 | status = uefi_call_wrapper(BS->HandleProtocol, 3, handle, |
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261 | &UgaProtocol, (void **)&uga); |
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262 | if (status != EFI_SUCCESS) |
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263 | continue; |
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264 | |
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265 | uefi_call_wrapper(BS->HandleProtocol, 3, handle, |
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266 | &PciIoProtocol, (void **)&pciio); |
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267 | |
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268 | status = uefi_call_wrapper(uga->GetMode, 5, uga, &w, &h, |
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269 | &depth, &refresh); |
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270 | |
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271 | if (status == EFI_SUCCESS && (!first || pciio)) { |
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272 | width = w; |
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273 | height = h; |
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274 | |
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275 | if (pciio) |
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276 | break; |
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277 | |
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278 | first = uga; |
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279 | } |
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280 | } |
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281 | |
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282 | if (!first) |
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283 | goto out; |
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284 | rv = 1; |
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285 | |
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286 | si->orig_video_isVGA = 0x70; /* EFI framebuffer */ |
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287 | |
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288 | si->lfb_depth = 32; |
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289 | si->lfb_width = width; |
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290 | si->lfb_height = height; |
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291 | |
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292 | si->red_size = 8; |
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293 | si->red_pos = 16; |
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294 | si->green_size = 8; |
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295 | si->green_pos = 8; |
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296 | si->blue_size = 8; |
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297 | si->blue_pos = 0; |
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298 | si->rsvd_size = 8; |
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299 | si->rsvd_pos = 24; |
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300 | |
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301 | out: |
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302 | FreePool(handles); |
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303 | return rv; |
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304 | } |
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305 | |
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306 | void setup_screen(struct screen_info *si) |
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307 | { |
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308 | memset(si, 0, sizeof(*si)); |
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309 | |
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310 | if (!setup_gop(si)) |
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311 | setup_uga(si); |
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312 | } |
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