| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2003-2004 Eric Biederman |
| * Copyright (C) 2005-2010 coresystems GmbH |
| * Copyright (C) 2014 Google Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <console/console.h> |
| #include <bootmem.h> |
| #include <cbmem.h> |
| #include <device/resource.h> |
| #include <stdlib.h> |
| |
| static struct memranges bootmem; |
| |
| void bootmem_init(void) |
| { |
| const unsigned long cacheable = IORESOURCE_CACHEABLE; |
| const unsigned long reserved = IORESOURCE_RESERVE; |
| struct memranges *bm = &bootmem; |
| |
| /* |
| * Fill the memory map out. The order of operations is important in |
| * that each overlapping range will take over the next. Therefore, |
| * add cacheable resources as RAM then add the reserved resources. |
| */ |
| memranges_init(bm, cacheable, cacheable, LB_MEM_RAM); |
| memranges_add_resources(bm, reserved, reserved, LB_MEM_RESERVED); |
| |
| /* Add memory used by CBMEM. */ |
| cbmem_add_bootmem(); |
| |
| bootmem_arch_add_ranges(); |
| } |
| |
| void bootmem_add_range(uint64_t start, uint64_t size, uint32_t type) |
| { |
| memranges_insert(&bootmem, start, size, type); |
| } |
| |
| void bootmem_write_memory_table(struct lb_memory *mem) |
| { |
| const struct range_entry *r; |
| struct lb_memory_range *lb_r; |
| |
| lb_r = &mem->map[0]; |
| |
| bootmem_dump_ranges(); |
| |
| memranges_each_entry(r, &bootmem) { |
| lb_r->start = pack_lb64(range_entry_base(r)); |
| lb_r->size = pack_lb64(range_entry_size(r)); |
| lb_r->type = range_entry_tag(r); |
| |
| lb_r++; |
| mem->size += sizeof(struct lb_memory_range); |
| } |
| } |
| |
| struct range_strings { |
| unsigned long tag; |
| const char *str; |
| }; |
| |
| static const struct range_strings type_strings[] = { |
| { LB_MEM_RAM, "RAM" }, |
| { LB_MEM_RESERVED, "RESERVED" }, |
| { LB_MEM_ACPI, "ACPI" }, |
| { LB_MEM_NVS, "NVS" }, |
| { LB_MEM_UNUSABLE, "UNUSABLE" }, |
| { LB_MEM_VENDOR_RSVD, "VENDOR RESERVED" }, |
| { LB_MEM_TABLE, "CONFIGURATION TABLES" }, |
| }; |
| |
| static const char *bootmem_range_string(unsigned long tag) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(type_strings); i++) { |
| if (type_strings[i].tag == tag) |
| return type_strings[i].str; |
| } |
| |
| return "UNKNOWN!"; |
| } |
| |
| void bootmem_dump_ranges(void) |
| { |
| int i; |
| const struct range_entry *r; |
| |
| i = 0; |
| memranges_each_entry(r, &bootmem) { |
| printk(BIOS_DEBUG, "%2d. %016llx-%016llx: %s\n", |
| i, range_entry_base(r), range_entry_end(r) - 1, |
| bootmem_range_string(range_entry_tag(r))); |
| i++; |
| } |
| } |
| |
| int bootmem_region_targets_usable_ram(uint64_t start, uint64_t size) |
| { |
| const struct range_entry *r; |
| uint64_t end = start + size; |
| |
| memranges_each_entry(r, &bootmem) { |
| /* All further bootmem entries are beyond this range. */ |
| if (end <= range_entry_base(r)) |
| break; |
| |
| if (start >= range_entry_base(r) && end <= range_entry_end(r)) { |
| if (range_entry_tag(r) == LB_MEM_RAM) |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| void *bootmem_allocate_buffer(size_t size) |
| { |
| const struct range_entry *r; |
| const struct range_entry *region; |
| /* All allocated buffers fall below the 32-bit boundary. */ |
| const resource_t max_addr = 1ULL << 32; |
| resource_t begin; |
| resource_t end; |
| |
| /* 4KiB alignment. */ |
| size = ALIGN(size, 4096); |
| region = NULL; |
| memranges_each_entry(r, &bootmem) { |
| if (range_entry_size(r) < size) |
| continue; |
| |
| if (range_entry_tag(r) != LB_MEM_RAM) |
| continue; |
| |
| if (range_entry_base(r) >= max_addr) |
| continue; |
| |
| end = range_entry_end(r); |
| if (end > max_addr) |
| end = max_addr; |
| |
| if ((end - range_entry_base(r)) < size) |
| continue; |
| |
| region = r; |
| } |
| |
| if (region == NULL) |
| return NULL; |
| |
| /* region now points to the highest usable region for the given size. */ |
| begin = range_entry_base(region); |
| end = range_entry_end(region); |
| if (end > max_addr) |
| end = max_addr; |
| begin = end - size; |
| |
| /* Mark buffer as unusuable for future buffer use. */ |
| bootmem_add_range(begin, size, LB_MEM_UNUSABLE); |
| |
| return (void *)(uintptr_t)begin; |
| } |