/** * memblock_set_node - set node ID on memblock regions * @base: base of area to set node ID for * @size: size of area to set node ID for * @nid: node ID to set * * Set the nid of memblock memory regions in [@base,@base+@size) to @nid. * Regions which cross the area boundaries are split as necessary. * * RETURNS: * 0 on success, -errno on failure. */ int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, int nid) { struct memblock_type *type = &memblock.memory; phys_addr_t end = base + size; int i; /* we'll create at most two more regions */ while (type->cnt + 2 > type->max) if (memblock_double_array(type) < 0) return -ENOMEM; for (i = 0; i < type->cnt; i++) { struct memblock_region *rgn = &type->regions[i]; phys_addr_t rbase = rgn->base; phys_addr_t rend = rbase + rgn->size; if (rbase >= end) break; if (rend <= base) continue; if (rbase < base) { /* * @rgn intersects from below. Split and continue * to process the next region - the new top half. */ rgn->base = base; rgn->size = rend - rgn->base; memblock_insert_region(type, i, rbase, base - rbase, rgn->nid); } else if (rend > end) { /* * @rgn intersects from above. Split and redo the * current region - the new bottom half. */ rgn->base = end; rgn->size = rend - rgn->base; memblock_insert_region(type, i--, rbase, end - rbase, rgn->nid); } else { /* @rgn is fully contained, set ->nid */ rgn->nid = nid; } } memblock_merge_regions(type); return 0; }
/** * memblock_set_node - set node ID on memblock regions * @base: base of area to set node ID for * @size: size of area to set node ID for * @nid: node ID to set * * Set the nid of memblock memory regions in [@base,@base+@size) to @nid. * Regions which cross the area boundaries are split as necessary. * * RETURNS: * 0 on success, -errno on failure. */ int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, int nid) { struct memblock_type *type = &memblock.memory; int start_rgn, end_rgn; int i, ret; ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); if (ret) return ret; for (i = start_rgn; i < end_rgn; i++) type->regions[i].nid = nid; memblock_merge_regions(type); return 0; }
/** * memblock_add_region - add new memblock region * @type: memblock type to add new region into * @base: base address of the new region * @size: size of the new region * @nid: nid of the new region * * Add new memblock region [@base,@base+@size) into @type. The new region * is allowed to overlap with existing ones - overlaps don't affect already * existing regions. @type is guaranteed to be minimal (all neighbouring * compatible regions are merged) after the addition. * * RETURNS: * 0 on success, -errno on failure. */ static int __init_memblock memblock_add_region(struct memblock_type *type, phys_addr_t base, phys_addr_t size, int nid) { bool insert = false; phys_addr_t obase = base; phys_addr_t end = base + memblock_cap_size(base, &size); int i, nr_new; /* special case for empty array */ if (type->regions[0].size == 0) { WARN_ON(type->cnt != 1 || type->total_size); type->regions[0].base = base; type->regions[0].size = size; memblock_set_region_node(&type->regions[0], nid); type->total_size = size; return 0; } repeat: /* * The following is executed twice. Once with %false @insert and * then with %true. The first counts the number of regions needed * to accomodate the new area. The second actually inserts them. */ base = obase; nr_new = 0; for (i = 0; i < type->cnt; i++) { struct memblock_region *rgn = &type->regions[i]; phys_addr_t rbase = rgn->base; phys_addr_t rend = rbase + rgn->size; if (rbase >= end) break; if (rend <= base) continue; /* * @rgn overlaps. If it separates the lower part of new * area, insert that portion. */ if (rbase > base) { nr_new++; if (insert) memblock_insert_region(type, i++, base, rbase - base, nid); } /* area below @rend is dealt with, forget about it */ base = min(rend, end); } /* insert the remaining portion */ if (base < end) { nr_new++; if (insert) memblock_insert_region(type, i, base, end - base, nid); } /* * If this was the first round, resize array and repeat for actual * insertions; otherwise, merge and return. */ if (!insert) { while (type->cnt + nr_new > type->max) if (memblock_double_array(type) < 0) return -ENOMEM; insert = true; goto repeat; } else { memblock_merge_regions(type); return 0; } }