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x86_64: initialise memblock using e820

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max 🍓
2023-02-05 10:50:13 +00:00
parent 21907010bd
commit b9b3794aee
5 changed files with 111 additions and 9 deletions
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30
arch/x86_64/init.c
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@@ -1,21 +1,51 @@
#include "socks/types.h"
#include <arch/e820.h>
#include <socks/init.h>
#include <socks/memblock.h>
#include <socks/vm.h>
#include <socks/printk.h>
#include <socks/machine/cpu.h>
#include <arch/vgacon.h>
#define PTR32(x) ((void *)((uintptr_t)(x)))
static ml_cpu_block g_bootstrap_cpu = {0};
/* start and end of kernel image (physical addresses) */
extern char __pstart[], __pend[];
static void bootstrap_cpu_init(void)
{
ml_cpu_block_init(&g_bootstrap_cpu);
ml_cpu_block_use(&g_bootstrap_cpu);
}
static void early_vm_init(void)
{
uintptr_t alloc_start = VM_KERNEL_VOFFSET;
/* boot code mapped 2 GiB of memory from
VM_KERNEL_VOFFSET */
uintptr_t alloc_end = VM_KERNEL_VOFFSET + 0x7fffffff;
memblock_init(alloc_start, alloc_end, VM_KERNEL_VOFFSET);
printk("memblock: allocating from [0x%llx-0x%llx]", alloc_start, alloc_end);
memblock_reserve(0x00, (uintptr_t)__pend);
printk("memblock: reserved bios+kernel at [0x%016llx-0x%016llx]", 0, (uintptr_t)__pend);
}
int ml_init(uintptr_t arg)
{
multiboot_info_t *mb = (multiboot_info_t *)arg;
bootstrap_cpu_init();
vgacon_init();
print_kernel_banner();
early_vm_init();
e820_scan(PTR32(mb->mmap_addr), mb->mmap_length);
return 0;
}