Max Wash
b8ccffd2d4
vm-object can be used to demand-allocate non-contiguous physical memory, and will provide an api for userspace programs to do the same. unless a vm-object is created in-place (i.e. to represent a specific area of physical memory), its memory pages are only allocated when the object is mapped AND someone attempts to access the memory.
55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
#include <limits.h>
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#include <mango/machine/cpu.h>
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#include <mango/memblock.h>
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#include <mango/printk.h>
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#include <mango/status.h>
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#include <mango/vm-object.h>
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#include <mango/vm.h>
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#include <stddef.h>
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#include <stdint.h>
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/* One struct vm_pg_data per NUMA node. */
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static struct vm_pg_data *node_data = NULL;
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kern_status_t vm_bootstrap(
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const struct vm_zone_descriptor *zones,
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size_t nr_zones)
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{
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int numa_count = 1;
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/* we're only worrying about UMA systems for now */
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node_data = memblock_alloc(sizeof(struct vm_pg_data) * numa_count, 8);
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/* TODO select which memory model to use automatically, and add
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a kernel boot parameter to override the choice */
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vm_set_memory_model(VM_MODEL_SPARSE);
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switch (vm_memory_model()) {
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case VM_MODEL_SPARSE:
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vm_sparse_init();
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break;
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case VM_MODEL_FLAT:
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vm_flat_init();
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break;
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default:
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break;
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}
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for (size_t i = 0; i < nr_zones; i++) {
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vm_zone_init(&node_data->pg_zones[zones[i].zd_id], &zones[i]);
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}
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kmalloc_init();
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vm_object_type_init();
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return KERN_OK;
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}
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struct vm_pg_data *vm_pg_data_get(vm_node_id_t node)
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{
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if (node == 0) {
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return node_data;
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}
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return NULL;
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}
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