target/linux/adm8668/files-3.18/arch/mips/adm8668/prom.c

   1 /*
   2  * Copyright (C) 2010 Scott Nicholas <neutronscott@scottn.us>
   3  *
   4  * based on work of rb532 prom.c
   5  *  Copyright (C) 2003, Peter Sadik <peter.sadik@idt.com>
   6  *  Copyright (C) 2005-2006, P.Christeas <p_christ@hol.gr>
   7  *  Copyright (C) 2007, Gabor Juhos <juhosg@openwrt.org>
   8  *                      Felix Fietkau <nbd@openwrt.org>
   9  *                      Florian Fainelli <florian@openwrt.org>
  10  *
  11  * This file is subject to the terms and conditions of the GNU General Public
  12  * License.  See the file "COPYING" in the main directory of this archive
  13  * for more details.
  14  */
  15
  16 #include <linux/init.h>
  17 #include <linux/kernel.h>
  18 #include <linux/types.h>
  19 #include <linux/console.h>
  20 #include <linux/string.h>
  21 #include <linux/serial_core.h>
  22 #include <asm/bootinfo.h>
  23 #include <adm8668.h>
  24 #include "u-boot.h"
  25
  26 register volatile struct global_data *gd asm ("k0");
  27
  28 void __init prom_free_prom_memory(void)
  29 {
  30         /* No prom memory to free */
  31 }
  32
  33 static inline int match_tag(char *arg, const char *tag)
  34 {
  35         return strncmp(arg, tag, strlen(tag)) == 0;
  36 }
  37
  38 static inline unsigned long tag2ul(char *arg, const char *tag)
  39 {
  40         char *num;
  41
  42         num = arg + strlen(tag);
  43         return simple_strtoul(num, 0, 10);
  44 }
  45
  46 void __init prom_setup_cmdline(void)
  47 {
  48         char *cp;
  49         int prom_argc;
  50         char **prom_argv;
  51         int i;
  52
  53         prom_argc = fw_arg0;
  54         prom_argv = (char **)KSEG0ADDR(fw_arg1);
  55
  56         cp = &(arcs_cmdline[0]);
  57         for (i = 1; i < prom_argc; i++) {
  58                 prom_argv[i] = (char *)KSEG0ADDR(prom_argv[i]);
  59
  60                 /* default bootargs has "console=/dev/ttyS0" yet console won't
  61                  * show up at all if you include the '/dev/' nowadays ... */
  62                 if (match_tag(prom_argv[i], "console=/dev/")) {
  63                         char *ptr = prom_argv[i] + strlen("console=/dev/");
  64
  65                         strcpy(cp, "console=");
  66                         cp += strlen("console=");
  67                         strcpy(cp, ptr);
  68                         cp += strlen(ptr);
  69                         *cp++ = ' ';
  70                         continue;
  71                 }
  72                 strcpy(cp, prom_argv[i]);
  73                 cp += strlen(prom_argv[i]);
  74                 *cp++ = ' ';
  75         }
  76         if (prom_argc > 1)
  77                 --cp; /* trailing space */
  78
  79         *cp = '\0';
  80 }
  81
  82 void __init prom_init(void)
  83 {
  84         bd_t *bd = gd->bd;
  85         int memsize;
  86
  87         memsize = bd->bi_memsize;
  88         printk("Board info:\n");
  89         printk("  RAM size: %d MB\n", (int)memsize/(1024*1024));
  90         printk("  NOR start: %#lx\n", bd->bi_flashstart);
  91         printk("  NOR size: %#lx\n", bd->bi_flashsize);
  92
  93         prom_setup_cmdline();
  94         add_memory_region(0, memsize, BOOT_MEM_RAM);
  95 }