// SPDX-License-Identifier: GPL-2.0-only #include #include #include static struct mem_region __initial_mem_regions[NR_INITIAL_MEM_REGIONS + 1]; static size_t nr_regions = NR_INITIAL_MEM_REGIONS; struct mem_region *mem_regions = __initial_mem_regions; void memregions_init(struct mem_region regions[], size_t nr) { mem_regions = regions; nr_regions = nr; } struct mem_region *memregions_add(struct mem_region *r) { struct mem_region *r_next = mem_regions; int i = 0; for (; r_next->end; ++r_next, ++i) ; assert(i < nr_regions); *r_next = *r; return r_next; } struct mem_region *memregions_find(phys_addr_t paddr) { struct mem_region *r; for (r = mem_regions; r->end; ++r) if (paddr >= r->start && paddr < r->end) return r; return NULL; } uint32_t memregions_get_flags(phys_addr_t paddr) { struct mem_region *r = memregions_find(paddr); return r ? r->flags : MR_F_UNKNOWN; } void memregions_split(phys_addr_t addr, struct mem_region **r1, struct mem_region **r2) { *r1 = memregions_find(addr); assert(*r1); if ((*r1)->start == addr) { *r2 = *r1; *r1 = NULL; return; } *r2 = memregions_add(&(struct mem_region){ .start = addr, .end = (*r1)->end, .flags = (*r1)->flags, }); (*r1)->end = addr; } void memregions_add_dt_regions(size_t max_nr) { struct dt_pbus_reg regs[max_nr]; int nr_regs, i; nr_regs = dt_get_memory_params(regs, max_nr); assert(nr_regs > 0); for (i = 0; i < nr_regs; ++i) { memregions_add(&(struct mem_region){ .start = regs[i].addr, .end = regs[i].addr + regs[i].size, }); } }