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fb: Support 64-bit EFI framebuffer bases

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This commit is contained in:
mintsuki 2021-03-21 08:25:50 +01:00
parent 698e386cc5
commit af53421cd0
2 changed files with 34 additions and 3 deletions
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2
stage23/lib/fb.h
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@ -11,7 +11,7 @@ struct resolution {
struct fb_info {
uint8_t memory_model;
uint32_t framebuffer_addr;
uint64_t framebuffer_addr;
uint16_t framebuffer_pitch;
uint16_t framebuffer_width;
uint16_t framebuffer_height;

35
stage23/protos/linux.c
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@ -107,6 +107,31 @@ struct screen_info {
uint8_t _reserved[2]; /* 0x3e */
} __attribute__((packed));
#define VIDEO_TYPE_MDA 0x10 /* Monochrome Text Display */
#define VIDEO_TYPE_CGA 0x11 /* CGA Display */
#define VIDEO_TYPE_EGAM 0x20 /* EGA/VGA in Monochrome Mode */
#define VIDEO_TYPE_EGAC 0x21 /* EGA in Color Mode */
#define VIDEO_TYPE_VGAC 0x22 /* VGA+ in Color Mode */
#define VIDEO_TYPE_VLFB 0x23 /* VESA VGA in graphic mode */
#define VIDEO_TYPE_PICA_S3 0x30 /* ACER PICA-61 local S3 video */
#define VIDEO_TYPE_MIPS_G364 0x31 /* MIPS Magnum 4000 G364 video */
#define VIDEO_TYPE_SGI 0x33 /* Various SGI graphics hardware */
#define VIDEO_TYPE_TGAC 0x40 /* DEC TGA */
#define VIDEO_TYPE_SUN 0x50 /* Sun frame buffer. */
#define VIDEO_TYPE_SUNPCI 0x51 /* Sun PCI based frame buffer. */
#define VIDEO_TYPE_PMAC 0x60 /* PowerMacintosh frame buffer. */
#define VIDEO_TYPE_EFI 0x70 /* EFI graphic mode */
#define VIDEO_FLAGS_NOCURSOR (1 << 0) /* The video mode has no cursor set */
#define VIDEO_CAPABILITY_SKIP_QUIRKS (1 << 0)
#define VIDEO_CAPABILITY_64BIT_BASE (1 << 1) /* Frame buffer base is 64-bit */
struct apm_bios_info {
uint16_t version;
uint16_t cseg;
@ -473,7 +498,9 @@ void linux_load(char *config, char *cmdline) {
if (!fb_init(&fbinfo, req_width, req_height, req_bpp))
panic("linux: Unable to set video mode");
screen_info->lfb_base = fbinfo.framebuffer_addr;
screen_info->capabilities = VIDEO_CAPABILITY_64BIT_BASE;
screen_info->lfb_base = (uint32_t)fbinfo.framebuffer_addr;
screen_info->ext_lfb_base = (uint32_t)(fbinfo.framebuffer_addr >> 32);
screen_info->lfb_size = fbinfo.framebuffer_pitch * fbinfo.framebuffer_height;
screen_info->lfb_width = fbinfo.framebuffer_width;
screen_info->lfb_height = fbinfo.framebuffer_height;
@ -486,7 +513,11 @@ void linux_load(char *config, char *cmdline) {
screen_info->blue_size = fbinfo.blue_mask_size;
screen_info->blue_pos = fbinfo.blue_mask_shift;
screen_info->orig_video_isVGA = 0x23;
#if defined (bios)
screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB;
#elif defined (uefi)
screen_info->orig_video_isVGA = VIDEO_TYPE_EFI;
#endif
///////////////////////////////////////
// RSDP