1 /* $NetBSD: efigop.c,v 1.3 2022/08/14 11:26:41 jmcneill Exp $ */
2
3 /*-
4 * Copyright (c) 2021 Jared McNeill <jmcneill@invisible.ca>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include "efiboot.h"
30
31 static EFI_GRAPHICS_OUTPUT_PROTOCOL *gop = NULL;
32
33 void
efi_gop_probe(void)34 efi_gop_probe(void)
35 {
36 EFI_HANDLE *gop_handle;
37 UINTN ngop_handle;
38 EFI_STATUS status;
39
40 status = LibLocateHandle(ByProtocol, &GraphicsOutputProtocol, NULL,
41 &ngop_handle, &gop_handle);
42 if (EFI_ERROR(status) || ngop_handle == 0) {
43 return;
44 }
45
46 for (size_t n = 0; n < ngop_handle; n++) {
47 status = uefi_call_wrapper(BS->HandleProtocol, 3,
48 gop_handle[n], &GraphicsOutputProtocol, (void **)&gop);
49 if (EFI_ERROR(status) || gop->Mode == NULL) {
50 gop = NULL;
51 continue;
52 } else {
53 break;
54 }
55 }
56 }
57
58 static uint32_t
efi_gop_bpp(EFI_GRAPHICS_OUTPUT_MODE_INFORMATION * info)59 efi_gop_bpp(EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info)
60 {
61 if (info->PixelFormat == PixelRedGreenBlueReserved8BitPerColor ||
62 info->PixelFormat == PixelBlueGreenRedReserved8BitPerColor) {
63 return 24;
64 }
65
66 return popcount32(info->PixelInformation.RedMask) +
67 popcount32(info->PixelInformation.GreenMask) +
68 popcount32(info->PixelInformation.BlueMask);
69 }
70
71 static void
efi_gop_printmode(UINT32 mode,EFI_GRAPHICS_OUTPUT_MODE_INFORMATION * info)72 efi_gop_printmode(UINT32 mode, EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info)
73 {
74 char buf[sizeof("NNNNN: HHHHHxVVVVV BB")];
75
76 snprintf(buf, sizeof(buf), "%-5u: %ux%u %u", mode,
77 info->HorizontalResolution, info->VerticalResolution,
78 efi_gop_bpp(info));
79
80 printf("%-21s", buf);
81 }
82
83 void
efi_gop_show(void)84 efi_gop_show(void)
85 {
86 if (gop == NULL) {
87 return;
88 }
89
90 command_printtab("GOP", "");
91 efi_gop_printmode(gop->Mode->Mode, gop->Mode->Info);
92 if (gop->Mode->FrameBufferBase != 0) {
93 printf(" (0x%lx,0x%lx)",
94 (unsigned long)gop->Mode->FrameBufferBase,
95 (unsigned long)gop->Mode->FrameBufferSize);
96 }
97 printf("\n");
98 }
99
100 void
efi_gop_dump(void)101 efi_gop_dump(void)
102 {
103 EFI_STATUS status;
104 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info;
105 UINTN size;
106
107 if (gop == NULL) {
108 return;
109 }
110
111 for (UINT32 mode = 0; mode < gop->Mode->MaxMode; mode++) {
112 status = uefi_call_wrapper(gop->QueryMode, 4, gop, mode,
113 &size, &info);
114 if (EFI_ERROR(status)) {
115 continue;
116 }
117 if (mode == gop->Mode->Mode) {
118 printf(" -> ");
119 } else {
120 printf(" ");
121 }
122 efi_gop_printmode(mode, info);
123 if (mode != gop->Mode->MaxMode - 1 &&
124 mode % 3 == 2) {
125 printf("\n");
126 }
127 }
128 printf("\n");
129 }
130
131 void
efi_gop_setmode(UINT32 mode)132 efi_gop_setmode(UINT32 mode)
133 {
134 EFI_STATUS status;
135
136 if (gop == NULL) {
137 return;
138 }
139
140 status = uefi_call_wrapper(gop->SetMode, 2, gop, mode);
141 if (EFI_ERROR(status)) {
142 printf("Failed to set video mode: %ld\n", (long)status);
143 }
144 }
145