long lmb_free(struct lmb *lmb, phys_addr_t base, phys_size_t size) { struct lmb_region *rgn = &(lmb->reserved); phys_addr_t rgnbegin, rgnend; phys_addr_t end = base + size; int i; rgnbegin = rgnend = 0; /* supress gcc warnings */ /* Find the region where (base, size) belongs to */ for (i=0; i < rgn->cnt; i++) { rgnbegin = rgn->region[i].base; rgnend = rgnbegin + rgn->region[i].size; if ((rgnbegin <= base) && (end <= rgnend)) break; } /* Didn't find the region */ if (i == rgn->cnt) return -1; /* Check to see if we are removing entire region */ if ((rgnbegin == base) && (rgnend == end)) { lmb_remove_region(rgn, i); return 0; } /* Check to see if region is matching at the front */ if (rgnbegin == base) { rgn->region[i].base = end; rgn->region[i].size -= size; return 0; } /* Check to see if the region is matching at the end */ if (rgnend == end) { rgn->region[i].size -= size; return 0; } /* * We need to split the entry - adjust the current one to the * beginging of the hole and add the region after hole. */ rgn->region[i].size = base - rgn->region[i].base; return lmb_add_region(rgn, end, rgnend - end); }
/* You must call lmb_analyze() after this. */ void __init lmb_enforce_memory_limit(u64 memory_limit) { unsigned long i; u64 limit; struct lmb_property *p; if (!memory_limit) return; /* Truncate the lmb regions to satisfy the memory limit. */ limit = memory_limit; for (i = 0; i < lmb.memory.cnt; i++) { if (limit > lmb.memory.region[i].size) { limit -= lmb.memory.region[i].size; continue; } lmb.memory.region[i].size = limit; lmb.memory.cnt = i + 1; break; } if (lmb.memory.region[0].size < lmb.rmo_size) lmb.rmo_size = lmb.memory.region[0].size; /* And truncate any reserves above the limit also. */ for (i = 0; i < lmb.reserved.cnt; i++) { p = &lmb.reserved.region[i]; if (p->base > memory_limit) p->size = 0; else if ((p->base + p->size) > memory_limit) p->size = memory_limit - p->base; if (p->size == 0) { lmb_remove_region(&lmb.reserved, i); i--; } } }
/* Assumption: base addr of region 1 < base addr of region 2 */ static void lmb_coalesce_regions(struct lmb_region *rgn, unsigned long r1, unsigned long r2) { rgn->region[r1].size += rgn->region[r2].size; lmb_remove_region(rgn, r2); }