target/linux/ifxmips/files-2.6.33/arch/mips/ifxmips/common/prom.c

   1 #include <linux/init.h>
   2 #include <linux/module.h>
   3 #include <linux/bootmem.h>
   4 #include <linux/etherdevice.h>
   5
   6 #include <asm/bootinfo.h>
   7
   8 #include <ifxmips.h>
   9 #include <ifxmips_prom.h>
  10
  11 /* for voice cpu (MIPS24K) */
  12 unsigned int *prom_cp1_base;
  13 unsigned int prom_cp1_size;
  14
  15 /* for Multithreading (APRP) on MIPS34K */
  16 unsigned long physical_memsize;
  17
  18 void
  19 prom_free_prom_memory(void)
  20 {
  21 }
  22
  23 unsigned int*
  24 prom_get_cp1_base(void)
  25 {
  26         return prom_cp1_base;
  27 }
  28 EXPORT_SYMBOL(prom_get_cp1_base);
  29
  30 unsigned int
  31 prom_get_cp1_size(void)
  32 {
  33         /* return size im MB */
  34         return prom_cp1_size>>20;
  35 }
  36 EXPORT_SYMBOL(prom_get_cp1_size);
  37
  38 extern unsigned char ifxmips_ethaddr[6];
  39 int cmdline_mac = 0;
  40
  41 static int __init
  42 ifxmips_set_ethaddr(char *str)
  43 {
  44 #define IS_HEX(x) \
  45         (((x >= '0' && x <= '9') || (x >= 'a' && x <= 'f') \
  46                 || (x >= 'A' && x <= 'F')) ? (1) : (0))
  47         int i;
  48         str = strchr(str, '=');
  49         if (!str)
  50                 goto out;
  51         str++;
  52         if (strlen(str) != 17)
  53                 goto out;
  54         for (i = 0; i < 6; i++) {
  55                 if (!IS_HEX(str[3 * i]) || !IS_HEX(str[(3 * i) + 1]))
  56                         goto out;
  57                 if ((i != 5) && (str[(3 * i) + 2] != ':'))
  58                         goto out;
  59                 ifxmips_ethaddr[i] = simple_strtoul(&str[3 * i], NULL, 16);
  60         }
  61         if (is_valid_ether_addr(ifxmips_ethaddr))
  62                 cmdline_mac = 1;
  63 out:
  64         return 1;
  65 }
  66 __setup("ethaddr", ifxmips_set_ethaddr);
  67
  68 void __init
  69 prom_init(void)
  70 {
  71         int argc = fw_arg0;
  72         char **argv = (char **) fw_arg1;
  73         char **envp = (char **) fw_arg2;
  74
  75         int memsize = 16; /* assume 16M as default */
  76         int i;
  77
  78         if (argc)
  79         {
  80                 argv = (char **)KSEG1ADDR((unsigned long)argv);
  81                 arcs_cmdline[0] = '\0';
  82                 for (i = 1; i < argc; i++)
  83                 {
  84                         char *a = (char *)KSEG1ADDR(argv[i]);
  85                         if (!argv[i])
  86                                 continue;
  87                         /* for voice cpu on Twinpass/Danube */
  88                         if (cpu_data[0].cputype == CPU_24K)
  89                                 if (!strncmp(a, "cp1_size=", 9))
  90                                 {
  91                                         prom_cp1_size = memparse(a + 9, &a);
  92                                         continue;
  93                                 }
  94                         if (strlen(arcs_cmdline) + strlen(a + 1) >= sizeof(arcs_cmdline))
  95                         {
  96                                 early_printf("cmdline overflow, skipping: %s\n", a);
  97                                 break;
  98                         }
  99                         strcat(arcs_cmdline, a);
 100                         strcat(arcs_cmdline, " ");
 101                 }
 102                 if (!*arcs_cmdline)
 103                         strcpy(&(arcs_cmdline[0]),
 104                                 "console=ttyS0,115200 rootfstype=squashfs,jffs2");
 105         }
 106         envp = (char **)KSEG1ADDR((unsigned long)envp);
 107         while (*envp)
 108         {
 109                 char *e = (char *)KSEG1ADDR(*envp);
 110
 111                 if (!strncmp(e, "memsize=", 8))
 112                 {
 113                         e += 8;
 114                         memsize = simple_strtoul(e, NULL, 10);
 115                 }
 116                 envp++;
 117         }
 118         memsize *= 1024 * 1024;
 119
 120         /* only on Twinpass/Danube a second CPU is used for Voice */
 121         if ((cpu_data[0].cputype == CPU_24K) && (prom_cp1_size))
 122         {
 123                 memsize -= prom_cp1_size;
 124                 prom_cp1_base = (unsigned int *)KSEG1ADDR(memsize);
 125
 126                 early_printf("Using %dMB Ram and reserving %dMB for cp1\n",
 127                         memsize>>20, prom_cp1_size>>20);
 128         }
 129
 130         add_memory_region(0x00000000, memsize, BOOT_MEM_RAM);
 131 }