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 #include <machine.h>
   8
   9 #include <ifxmips.h>
  10 #include <ifxmips_prom.h>
  11
  12 /* for voice cpu (MIPS24K) */
  13 unsigned int *prom_cp1_base;
  14 unsigned int prom_cp1_size;
  15
  16 /* for Multithreading (APRP) on MIPS34K */
  17 unsigned long physical_memsize;
  18
  19 void
  20 prom_free_prom_memory(void)
  21 {
  22 }
  23
  24 unsigned int*
  25 prom_get_cp1_base(void)
  26 {
  27         return prom_cp1_base;
  28 }
  29 EXPORT_SYMBOL(prom_get_cp1_base);
  30
  31 unsigned int
  32 prom_get_cp1_size(void)
  33 {
  34         /* return size im MB */
  35         return prom_cp1_size>>20;
  36 }
  37 EXPORT_SYMBOL(prom_get_cp1_size);
  38
  39 extern unsigned char ifxmips_ethaddr[6];
  40 int cmdline_mac = 0;
  41
  42 static int __init
  43 ifxmips_set_ethaddr(char *str)
  44 {
  45 #define IS_HEX(x) \
  46         (((x >= '0' && x <= '9') || (x >= 'a' && x <= 'f') \
  47                 || (x >= 'A' && x <= 'F')) ? (1) : (0))
  48         int i;
  49         str = strchr(str, '=');
  50         if (!str)
  51                 goto out;
  52         str++;
  53         if (strlen(str) != 17)
  54                 goto out;
  55         for (i = 0; i < 6; i++) {
  56                 if (!IS_HEX(str[3 * i]) || !IS_HEX(str[(3 * i) + 1]))
  57                         goto out;
  58                 if ((i != 5) && (str[(3 * i) + 2] != ':'))
  59                         goto out;
  60                 ifxmips_ethaddr[i] = simple_strtoul(&str[3 * i], NULL, 16);
  61         }
  62         if (is_valid_ether_addr(ifxmips_ethaddr))
  63                 cmdline_mac = 1;
  64 out:
  65         return 1;
  66 }
  67 __setup("ethaddr", ifxmips_set_ethaddr);
  68
  69 static void __init prom_detect_machtype(void)
  70 {
  71         mips_machtype = IFXMIPS_MACH_EASY50712;
  72 }
  73
  74 static void __init prom_init_cmdline(void)
  75 {
  76         int argc = fw_arg0;
  77         char **argv = (char **) fw_arg1;
  78         char **envp = (char **) fw_arg2;
  79
  80         int memsize = 16; /* assume 16M as default */
  81         int i;
  82
  83         if (argc)
  84         {
  85                 argv = (char **)KSEG1ADDR((unsigned long)argv);
  86                 arcs_cmdline[0] = '\0';
  87                 for (i = 1; i < argc; i++)
  88                 {
  89                         char *a = (char *)KSEG1ADDR(argv[i]);
  90                         if (!argv[i])
  91                                 continue;
  92                         /* for voice cpu on Twinpass/Danube */
  93                         if (cpu_data[0].cputype == CPU_24K)
  94                                 if (!strncmp(a, "cp1_size=", 9))
  95                                 {
  96                                         prom_cp1_size = memparse(a + 9, &a);
  97                                         continue;
  98                                 }
  99                         if (strlen(arcs_cmdline) + strlen(a + 1) >= sizeof(arcs_cmdline))
 100                         {
 101                                 early_printf("cmdline overflow, skipping: %s\n", a);
 102                                 break;
 103                         }
 104                         strcat(arcs_cmdline, a);
 105                         strcat(arcs_cmdline, " ");
 106                 }
 107                 if (!*arcs_cmdline)
 108                         strcpy(&(arcs_cmdline[0]),
 109                                 "console=ttyS0,115200 rootfstype=squashfs,jffs2");
 110         }
 111         envp = (char **)KSEG1ADDR((unsigned long)envp);
 112         while (*envp)
 113         {
 114                 char *e = (char *)KSEG1ADDR(*envp);
 115
 116                 if (!strncmp(e, "memsize=", 8))
 117                 {
 118                         e += 8;
 119                         memsize = simple_strtoul(e, NULL, 10);
 120                 }
 121                 envp++;
 122         }
 123         memsize *= 1024 * 1024;
 124
 125         /* only on Twinpass/Danube a second CPU is used for Voice */
 126         if ((cpu_data[0].cputype == CPU_24K) && (prom_cp1_size))
 127         {
 128                 memsize -= prom_cp1_size;
 129                 prom_cp1_base = (unsigned int *)KSEG1ADDR(memsize);
 130
 131                 early_printf("Using %dMB Ram and reserving %dMB for cp1\n",
 132                         memsize>>20, prom_cp1_size>>20);
 133         }
 134
 135         add_memory_region(0x00000000, memsize, BOOT_MEM_RAM);
 136 }
 137
 138 void __init
 139 prom_init(void)
 140 {
 141         prom_detect_machtype();
 142         prom_init_cmdline();
 143 }