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#include <multiboot2.h>
#include <stdlib.h>
extern "C" void dump_multiboot(uint32_t mb_magic, uint32_t mb_addr) {
printk("multiboot magic: ", uhex{mb_magic}, mb_magic == MULTIBOOT2_BOOTLOADER_MAGIC ? " valid" : " invalid", '\n');
printk("multiboot addr: ", uhex{mb_addr}, !(mb_addr & 7) ? " is aligned" : " is not aligned", '\n');
struct multiboot_tag* tag;
const uint32_t size = *reinterpret_cast<uint32_t*>(mb_addr);
printk("Announced mbi size ", size, '\n');
for (tag = reinterpret_cast<multiboot_tag*>(mb_addr + 8); tag->type != MULTIBOOT_TAG_TYPE_END;
tag = reinterpret_cast<multiboot_tag*>(reinterpret_cast<uint8_t*>(tag) + ((tag->size + 7u) & ~7u))) {
switch (tag->type) {
case MULTIBOOT_TAG_TYPE_CMDLINE: {
auto* t = reinterpret_cast<multiboot_tag_string*>(tag);
printk("Command line = [", t->string, "]\n");
} break;
case MULTIBOOT_TAG_TYPE_BOOT_LOADER_NAME: {
auto* t = reinterpret_cast<multiboot_tag_string*>(tag);
printk("Boot loader name = [", t->string, "]\n");
} break;
case MULTIBOOT_TAG_TYPE_BOOTDEV: {
auto* t = reinterpret_cast<multiboot_tag_bootdev*>(tag);
printk("Boot device ", uhex{t->biosdev}, " slice ", uhex{t->slice}, " part ", uhex{t->part}, '\n');
} break;
case MULTIBOOT_TAG_TYPE_BASIC_MEMINFO: {
auto* t = reinterpret_cast<multiboot_tag_basic_meminfo*>(tag);
printk("mem_lower = ", t->mem_lower, "KB\n", "mem_upper = ", t->mem_upper, "KB\n");
} break;
case MULTIBOOT_TAG_TYPE_MMAP: {
auto* t = reinterpret_cast<multiboot_tag_mmap*>(tag);
multiboot_memory_map_t* mmap;
printk("memory map\n");
for (mmap = t->entries; reinterpret_cast<uint8_t*>(mmap) < reinterpret_cast<uint8_t*>(tag) + tag->size;
mmap = reinterpret_cast<multiboot_memory_map_t*>(reinterpret_cast<uint32_t>(mmap) +
reinterpret_cast<multiboot_tag_mmap*>(tag)->entry_size)) {
printk(" base_addr = ", uhex{static_cast<uint32_t>(mmap->addr >> 32)}, ' ',
uhex{static_cast<uint32_t>(mmap->addr & 0xffffffff)});
printk(" length = ", static_cast<uint32_t>(mmap->len >> 32), ' ',
static_cast<uint32_t>(mmap->len & 0xffffffff));
printk(" type = ", mmap->type, '\n');
}
} break;
default:
printk("Tag ", tag->type, ", Size ", tag->size, '\n');
break;
} // switch(tag->type)
} // for(each tag)
tag = reinterpret_cast<multiboot_tag*>(reinterpret_cast<uint8_t*>(tag) + ((tag->size + 7u) & ~7u));
printk("Total mbi size ", reinterpret_cast<uint32_t>(tag) - mb_addr, '\n');
}
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