From 876970bcfd69ed3742d1a47640aa551578f22919 Mon Sep 17 00:00:00 2001 From: Freya Murphy Date: Thu, 3 Apr 2025 22:19:32 -0400 Subject: load multiboot memory map, heap is done!!! --- kernel/mboot/mboot.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 kernel/mboot/mboot.c (limited to 'kernel/mboot/mboot.c') diff --git a/kernel/mboot/mboot.c b/kernel/mboot/mboot.c new file mode 100644 index 0000000..08a0f37 --- /dev/null +++ b/kernel/mboot/mboot.c @@ -0,0 +1,26 @@ + +#include "mboot.h" + +void *locate_mboot_table(volatile void *mboot, uint32_t type) +{ + struct mboot_info *info = (struct mboot_info *) mboot; + const char *mboot_end = ((char *) info) + info->total_size; + + char *tag_ptr = info->tags; + + while (tag_ptr < mboot_end) { + struct mboot_tag *tag = (struct mboot_tag *) tag_ptr; + + if (tag->type == type) + return tag; + + // goto next + int size = tag->size; + if (size % 8 != 0) { + size += 8 - (size % 8); + } + tag_ptr += size; + } + + return NULL; +} -- cgit v1.2.3-freya