1 /* 2 * Atheros AR71XX/AR724X/AR913X specific prom routines 3 * 4 * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org> 5 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License version 2 as published 9 * by the Free Software Foundation. 10 */ 11 12 #include <linux/kernel.h> 13 #include <linux/init.h> 14 #include <linux/io.h> 15 #include <linux/string.h> 16 17 #include <asm/bootinfo.h> 18 #include <asm/addrspace.h> 19 20 #include "common.h" 21 22 static inline int is_valid_ram_addr(void *addr) 23 { 24 if (((u32) addr > KSEG0) && 25 ((u32) addr < (KSEG0 + ATH79_MEM_SIZE_MAX))) 26 return 1; 27 28 if (((u32) addr > KSEG1) && 29 ((u32) addr < (KSEG1 + ATH79_MEM_SIZE_MAX))) 30 return 1; 31 32 return 0; 33 } 34 35 static __init void ath79_prom_init_cmdline(int argc, char **argv) 36 { 37 int i; 38 39 if (!is_valid_ram_addr(argv)) 40 return; 41 42 for (i = 0; i < argc; i++) 43 if (is_valid_ram_addr(argv[i])) { 44 strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline)); 45 strlcat(arcs_cmdline, argv[i], sizeof(arcs_cmdline)); 46 } 47 } 48 49 void __init prom_init(void) 50 { 51 ath79_prom_init_cmdline(fw_arg0, (char **)fw_arg1); 52 } 53 54 void __init prom_free_prom_memory(void) 55 { 56 /* We do not have to prom memory to free */ 57 } 58