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| author | Damien Zammit <damien@zamaudio.com> | 2024-10-24 00:10:56 +0000 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2024-10-26 23:33:38 +0200 |
| commit | 19aa2eed99e4a05ae25095a6c06d0d157a42fba2 (patch) | |
| tree | 0b208ba93b35b0d3cefe8dfd6ffbaf200a4c47e2 /i386 | |
| parent | 0dd8b683c2d8306be59d9bcc9e2019565ab40ef9 (diff) | |
| download | gnumach-19aa2eed99e4a05ae25095a6c06d0d157a42fba2.tar.gz gnumach-19aa2eed99e4a05ae25095a6c06d0d157a42fba2.tar.bz2 gnumach-19aa2eed99e4a05ae25095a6c06d0d157a42fba2.zip | |
multiboot v1: Add video framebuffer info
Message-ID: <20241024001047.3033826-1-damien@zamaudio.com>
Diffstat (limited to 'i386')
| -rw-r--r-- | i386/include/mach/i386/multiboot.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/i386/include/mach/i386/multiboot.h b/i386/include/mach/i386/multiboot.h index c3538c1f..87bcd595 100644 --- a/i386/include/mach/i386/multiboot.h +++ b/i386/include/mach/i386/multiboot.h @@ -43,6 +43,9 @@ /* Must be provided memory information in multiboot_raw_info structure */ #define MULTIBOOT_MEMORY_INFO 0x00000002 +/* Must pass video information in multiboot_raw_info structure */ +#define MULTIBOOT_VIDEO_MODE 0x00000004 + /* Use the load address fields above instead of the ones in the a.out header to figure out what to load where, and what to do afterwards. This should only be needed for a.out kernel images @@ -62,7 +65,14 @@ #define MULTIBOOT_AOUT_SYMS 0x00000010 #define MULTIBOOT_ELF_SHDR 0x00000020 #define MULTIBOOT_MEM_MAP 0x00000040 +/* skip some fields from spec */ +#define MULTIBOOT_FRAMEBUFFER 0x00001000 + +#define MULTIBOOT_VIDEO_MODE_TYPE_LINEARFB 0 +#define MULTIBOOT_VIDEO_MODE_TYPE_EGA_TEXT 1 + +#define MULTIBOOT_VIDEO_PARAM_NO_PREFERENCE 0 /* The mods_addr field above contains the physical address of the first of 'mods_count' multiboot_module structures. */ @@ -148,6 +158,38 @@ struct multiboot32_module #define MULTIBOOT_LOADER_SHDR 0x20 #define MULTIBOOT_LOADER_MMAP 0x40 +struct multiboot_header +{ + /* Must be MULTIBOOT_MAGIC - see above. */ + uint32_t magic; + + /* Feature flags. */ + uint32_t flags; + + /* The above fields plus this one must equal 0 mod 2^32. */ + uint32_t checksum; + + /* These are only valid if MULTIBOOT_AOUT_KLUDGE is set. */ + uint32_t header_addr; + uint32_t load_addr; + uint32_t load_end_addr; + uint32_t bss_end_addr; + uint32_t entry_addr; + + /* These are only valid if MULTIBOOT_VIDEO_MODE is set. */ + uint32_t mode_type; + uint32_t width; + uint32_t height; + uint32_t depth; +} __packed; + +struct multiboot_color +{ + uint8_t red; + uint8_t green; + uint8_t blue; +} __packed; + /* * A multiboot module. */ @@ -168,6 +210,35 @@ struct multiboot_raw_mmap_entry { uint32_t type; } __packed; +struct multiboot_framebuffer_info { + uint64_t framebuffer_addr; + uint32_t framebuffer_pitch; + uint32_t framebuffer_width; + uint32_t framebuffer_height; + uint8_t framebuffer_bpp; +#define MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED 0 +#define MULTIBOOT_FRAMEBUFFER_TYPE_RGB 1 +#define MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT 2 + uint8_t framebuffer_type; + union + { + struct + { + uint32_t framebuffer_palette_addr; + uint16_t framebuffer_palette_num_colors; + }; + struct + { + uint8_t framebuffer_red_field_position; + uint8_t framebuffer_red_mask_size; + uint8_t framebuffer_green_field_position; + uint8_t framebuffer_green_mask_size; + uint8_t framebuffer_blue_field_position; + uint8_t framebuffer_blue_mask_size; + }; + }; +} __packed; + /* * Multiboot information structure as passed by the boot loader. */ @@ -186,6 +257,7 @@ struct multiboot_raw_info { uint32_t mmap_length; uint32_t mmap_addr; uint32_t unused1[9]; + struct multiboot_framebuffer_info fb_info; } __packed; /* |