mmap.c (2048B)
1 /* 2 * Copyright (c) 2013 Kevin Wolf <kwolf@redhat.com> 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a copy 5 * of this software and associated documentation files (the "Software"), to deal 6 * in the Software without restriction, including without limitation the rights 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 8 * copies of the Software, and to permit persons to whom the Software is 9 * furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 20 * THE SOFTWARE. 21 */ 22 23 #include "libc.h" 24 #include "multiboot.h" 25 26 int test_main(uint32_t magic, struct mb_info *mbi) 27 { 28 uintptr_t entry_addr; 29 struct mb_mmap_entry *entry; 30 31 (void) magic; 32 33 printf("Lower memory: %dk\n", mbi->mem_lower); 34 printf("Upper memory: %dk\n", mbi->mem_upper); 35 36 printf("\ne820 memory map:\n"); 37 38 for (entry_addr = mbi->mmap_addr; 39 entry_addr < mbi->mmap_addr + mbi->mmap_length; 40 entry_addr += entry->size + 4) 41 { 42 entry = (struct mb_mmap_entry*) entry_addr; 43 44 printf("%#llx - %#llx: type %d [entry size: %d]\n", 45 entry->base_addr, 46 entry->base_addr + entry->length, 47 entry->type, 48 entry->size); 49 } 50 51 printf("\nmmap start: %#x\n", mbi->mmap_addr); 52 printf("mmap end: %#x\n", mbi->mmap_addr + mbi->mmap_length); 53 printf("real mmap end: %#x\n", entry_addr); 54 55 return 0; 56 }