82 lines
2.7 KiB
C
82 lines
2.7 KiB
C
#include <common/cdef.h>
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#include <common/consts.h>
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#include <ke/print.h>
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#include <arch/print.h>
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#include <arch/brute.h>
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#include <arch/mlayout.h>
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#include <arch/pmap.h>
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#include <mm/phys.h>
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#include "multiboot2.h"
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// kernel entry point
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extern void
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kmain();
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/*
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* process muliboot info and populate various subsystems
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* after this mate, the original multiboot info can be safely discarded
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*/
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static void
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proc_mbinfo(void *mb_info)
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{
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uint8 mmap_detected = 0;
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for (struct multiboot_tag *tag = (struct multiboot_tag *) ((uintptr) mb_info + 8);
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tag->type != MULTIBOOT_TAG_TYPE_END;
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tag = (struct multiboot_tag *) ((multiboot_uint8_t *) tag
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+ ((tag->size + 7) & ~7u))) {
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PDBG("Tag 0x%p: %d, Size %d", (void *) tag, tag->type, tag->size);
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switch (tag->type) {
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case MULTIBOOT_TAG_TYPE_MMAP:
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mmap_detected = 1;
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PDBG("Detected MultiBoot memory map.");
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for (struct multiboot_mmap_entry *entry = ((struct multiboot_tag_mmap *) tag)->entries;
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(multiboot_uint8_t *) entry < (multiboot_uint8_t *) tag + tag->size;
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entry = (multiboot_memory_map_t *) ((uintptr) entry +
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((struct multiboot_tag_mmap *) tag)->entry_size)) {
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PDBG("Adding to pmap seg: base = 0x%lx,"
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" length = 0x%lx, type = 0x%x.",
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(ulong) entry->addr,
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(ulong) entry->len,
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entry->type);
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if (entry->type == MULTIBOOT_MEMORY_AVAILABLE) {
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// add physical segments to mm phys subsystem
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archp_mem_addseg(entry->addr, entry->len);
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}
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}
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break;
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case MULTIBOOT_TAG_TYPE_BOOT_LOADER_NAME:
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PDBG("Detected bootloader: %s", ((struct multiboot_tag_string *) tag)->string);
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break;
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default:
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PDBG("Ignoring MultiBoot tag type: %d size: 0x%x", tag->type, tag->size);
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break;
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}
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}
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if (!mmap_detected) {
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BRUTE("proc_mbinfo: could not find MMAP tag.");
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}
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}
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ATTR_USED void
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arch_main(void *mb_info)
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{
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arch_print_init();
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PINFO("BoND %s. Kernel loaded at: 0x%p size: 0x%lx.", KVERSION, (void *) ARCH_ML_KIMAGE_START,
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(usize) (ARCH_ML_KIMAGE_STOP - ARCH_ML_KIMAGE_START));
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PINFO("Processing MultiBoot struct at 0x%p...", mb_info);
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proc_mbinfo(mb_info);
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// at this point we don't need access to multiboot info anymore -> we can freely overwrite this region
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PINFO("Initializing early memory...");
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archp_mem_init();
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kmain();
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}
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