1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * PROM library functions for acquiring/using memory descriptors given to 7 * us from the YAMON. 8 * 9 * Copyright (C) 1999,2000,2012 MIPS Technologies, Inc. 10 * All rights reserved. 11 * Authors: Carsten Langgaard <carstenl@mips.com> 12 * Steven J. Hill <sjhill@mips.com> 13 */ 14 #include <linux/init.h> 15 #include <linux/memblock.h> 16 #include <linux/string.h> 17 18 #include <asm/bootinfo.h> 19 #include <asm/cdmm.h> 20 #include <asm/maar.h> 21 #include <asm/sections.h> 22 #include <asm/fw/fw.h> 23 24 /* determined physical memory size, not overridden by command line args */ 25 unsigned long physical_memsize = 0L; 26 27 static void free_init_pages_eva_malta(void *begin, void *end) 28 { 29 free_init_pages("unused kernel", __pa_symbol((unsigned long *)begin), 30 __pa_symbol((unsigned long *)end)); 31 } 32 33 void __init fw_meminit(void) 34 { 35 bool eva = IS_ENABLED(CONFIG_EVA); 36 37 free_init_pages_eva = eva ? free_init_pages_eva_malta : NULL; 38 } 39 40 void __init prom_free_prom_memory(void) 41 { 42 unsigned long addr; 43 int i; 44 45 for (i = 0; i < boot_mem_map.nr_map; i++) { 46 if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA) 47 continue; 48 49 addr = boot_mem_map.map[i].addr; 50 free_init_pages("YAMON memory", 51 addr, addr + boot_mem_map.map[i].size); 52 } 53 } 54 55 phys_addr_t mips_cdmm_phys_base(void) 56 { 57 /* This address is "typically unused" */ 58 return 0x1fc10000; 59 } 60