mango/vm/bootstrap.c

#include <limits.h>
#include <mango/machine/cpu.h>
#include <mango/memblock.h>
#include <mango/printk.h>
#include <mango/status.h>
#include <mango/vm-object.h>
#include <mango/vm.h>
#include <stddef.h>
#include <stdint.h>

/* One struct vm_pg_data per NUMA node. */
static struct vm_pg_data *node_data = NULL;

kern_status_t vm_bootstrap(
	const struct vm_zone_descriptor *zones,
	size_t nr_zones)
{
	int numa_count = 1;

	/* we're only worrying about UMA systems for now */
	node_data = memblock_alloc(sizeof(struct vm_pg_data) * numa_count, 8);

	/* TODO select which memory model to use automatically, and add
	   a kernel boot parameter to override the choice */
	vm_set_memory_model(VM_MODEL_SPARSE);

	switch (vm_memory_model()) {
	case VM_MODEL_SPARSE:
		vm_sparse_init();
		break;
	case VM_MODEL_FLAT:
		vm_flat_init();
		break;
	default:
		break;
	}

	for (size_t i = 0; i < nr_zones; i++) {
		vm_zone_init(&node_data->pg_zones[zones[i].zd_id], &zones[i]);
	}

	kmalloc_init();
	vm_object_type_init();
	return KERN_OK;
}

struct vm_pg_data *vm_pg_data_get(vm_node_id_t node)
{
	if (node == 0) {
		return node_data;
	}

	return NULL;
}