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Diffstat (limited to 'kernel/src/boot/header.S')
| -rw-r--r-- | kernel/src/boot/header.S | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/kernel/src/boot/header.S b/kernel/src/boot/header.S new file mode 100644 index 0000000..bbcb9be --- /dev/null +++ b/kernel/src/boot/header.S @@ -0,0 +1,40 @@ +// multiboot tags +.set TAG_END, 0 +.set TAG_FRAMEBUFFER, 5 + +// multiboot flags +.set TAG_REQUIRED, 0 +.set TAG_OPTIONAL, 1 + +# multiboot2 header constants +.set MAGIC, 0xe85250d6 +.set ARCH, 0 +.set HEADER_LENGTH, (header_end - header_start) +.set CHECKSUM, 0x100000000 - (MAGIC + ARCH + HEADER_LENGTH) + +.section .multiboot_header, "a" +.align 4 +header_start: + # magic + .align 8 + .long MAGIC + .long ARCH + .long HEADER_LENGTH + .long CHECKSUM + + # framebuffer + .align 8 + .word TAG_FRAMEBUFFER + .word TAG_REQUIRED + .long 20 + .long 1024 + .long 768 + .long 32 + + # end tag + .align 8 + .word TAG_END + .word TAG_REQUIRED + .long 8 + +header_end: |