mango/arch/user/init.c

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <socks/init.h>
#include <socks/memblock.h>
#include <socks/vm.h>
#include <socks/object.h>
#include <socks/printk.h>
#include <arch/stdcon.h>
#include <sys/mman.h>

#define PMEM_SIZE 0x4000000

extern void kernel_init(uintptr_t arg);

static void *pmem = NULL;

static void early_vm_init(void)
{
	pmem = mmap(NULL, PMEM_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
	if (pmem == MAP_FAILED) {
		fprintf(stderr, "arch: cannot map physical memory buffer.");
		abort();
	}
	
	uintptr_t alloc_start = (uintptr_t)pmem + VM_PAGE_SIZE;
	uintptr_t alloc_end = alloc_start + PMEM_SIZE;

	memblock_init(alloc_start, alloc_end, (uintptr_t)pmem);
	printk("memblock: allocating from [0x%llx-0x%llx]", alloc_start, alloc_end);
}

uintptr_t __pagemap_base(void)
{
	return (uintptr_t)pmem;
}

uintptr_t __pagemap_limit(void)
{
	return (uintptr_t)pmem + PMEM_SIZE - 1;
}

int ml_init(uintptr_t arg)
{
	stdcon_init();
	print_kernel_banner();
	early_vm_init();

	memblock_add(0, PMEM_SIZE);

	vm_zone_descriptor_t vm_zones[] = {
		{ .zd_id = VM_ZONE_DMA, .zd_node = 0, .zd_name = "dma", .zd_base = 0x00, .zd_limit = 0xffffff },
		{ .zd_id = VM_ZONE_NORMAL, .zd_node = 0, .zd_name = "normal", .zd_base = 0x1000000, .zd_limit = UINTPTR_MAX },
	};

	vm_bootstrap(vm_zones, sizeof vm_zones / sizeof vm_zones[0]);
	
	return 0;
}

int main(int argc, const char **argv)
{
	kernel_init(0);

	munmap(pmem, PMEM_SIZE);
	return 0;
}