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/bootmem.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