vm_map_t *vm_map_new(void) {
vm_map_t *map = kmalloc(M_VMMAP, sizeof(vm_map_t), M_ZERO);
vm_map_setup(map);
*((pmap_t **)&map->pmap) = pmap_new();
return map;
}
void
kmem_submap(
vm_map_t map,
vm_map_t parent,
vm_offset_t *min,
vm_offset_t *max,
vm_size_t size,
boolean_t pageable)
{
vm_offset_t addr;
kern_return_t kr;
size = round_page(size);
/*
* Need reference on submap object because it is internal
* to the vm_system. vm_object_enter will never be called
* on it (usual source of reference for vm_map_enter).
*/
vm_object_reference(vm_submap_object);
addr = vm_map_min(parent);
kr = vm_map_enter(parent, &addr, size,
(vm_offset_t) 0, TRUE,
vm_submap_object, (vm_offset_t) 0, FALSE,
VM_PROT_DEFAULT, VM_PROT_ALL, VM_INHERIT_DEFAULT);
if (kr != KERN_SUCCESS)
panic("kmem_submap");
pmap_reference(vm_map_pmap(parent));
vm_map_setup(map, vm_map_pmap(parent), addr, addr + size, pageable);
kr = vm_map_submap(parent, addr, addr + size, map);
if (kr != KERN_SUCCESS)
panic("kmem_submap");
*min = addr;
*max = addr + size;
}
/*
* kmem_init:
*
* Initialize the kernel's virtual memory map, taking
* into account all memory allocated up to this time.
*/
void kmem_init(
vm_offset_t start,
vm_offset_t end)
{
vm_map_setup(kernel_map, pmap_kernel(), VM_MIN_KERNEL_ADDRESS, end,
FALSE);
/*
* Reserve virtual memory allocated up to this time.
*/
if (start != VM_MIN_KERNEL_ADDRESS) {
kern_return_t rc;
vm_offset_t addr = VM_MIN_KERNEL_ADDRESS;
rc = vm_map_enter(kernel_map,
&addr, start - VM_MIN_KERNEL_ADDRESS,
(vm_offset_t) 0, TRUE,
VM_OBJECT_NULL, (vm_offset_t) 0, FALSE,
VM_PROT_DEFAULT, VM_PROT_ALL,
VM_INHERIT_DEFAULT);
if (rc)
panic("%s:%d: vm_map_enter failed (%d)\n", rc);
}
}
static void vm_map_init(void) {
vm_map_setup(&kspace);
*((pmap_t **)(&kspace.pmap)) = get_kernel_pmap();
}
