arch/mips/sni/sniprom.c

   1 /*
   2  * Big Endian PROM code for SNI RM machines
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  *
   8  * Copyright (C) 2005-2006 Florian Lohoff (flo@rfc822.org)
   9  * Copyright (C) 2005-2006 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
  10  */
  11
  12 #define DEBUG
  13
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/string.h>
  17 #include <linux/console.h>
  18
  19 #include <asm/addrspace.h>
  20 #include <asm/sni.h>
  21 #include <asm/mipsprom.h>
  22 #include <asm/mipsregs.h>
  23 #include <asm/bootinfo.h>
  24
  25 /* special SNI prom calls */
  26 /*
  27  * This does not exist in all proms - SINIX compares
  28  * the prom env variable "version" against "2.0008"
  29  * or greater. If lesser it tries to probe interesting
  30  * registers
  31  */
  32 #define PROM_GET_MEMCONF        58
  33
  34 #define PROM_VEC                (u64 *)CKSEG1ADDR(0x1fc00000)
  35 #define PROM_ENTRY(x)           (PROM_VEC + (x))
  36
  37
  38 static int *(*__prom_putchar)(int)        = (int *(*)(int))PROM_ENTRY(PROM_PUTCHAR);
  39
  40 void prom_putchar(char c)
  41 {
  42         __prom_putchar(c);
  43 }
  44
  45 static char *(*__prom_getenv)(char *)     = (char *(*)(char *))PROM_ENTRY(PROM_GETENV);
  46 static void (*__prom_get_memconf)(void *) = (void (*)(void *))PROM_ENTRY(PROM_GET_MEMCONF);
  47
  48 char *prom_getenv (char *s)
  49 {
  50         return __prom_getenv(s);
  51 }
  52
  53 void __init prom_free_prom_memory(void)
  54 {
  55 }
  56
  57 /*
  58  * /proc/cpuinfo system type
  59  *
  60  */
  61 static const char *systype = "Unknown";
  62 const char *get_system_type(void)
  63 {
  64         return systype;
  65 }
  66
  67 #define SNI_IDPROM_BASE                0xbff00000
  68 #define SNI_IDPROM_MEMSIZE             (SNI_IDPROM_BASE+0x28)  /* Memsize in 16MB quantities */
  69 #define SNI_IDPROM_BRDTYPE             (SNI_IDPROM_BASE+0x29)  /* Board Type */
  70 #define SNI_IDPROM_CPUTYPE             (SNI_IDPROM_BASE+0x30)  /* CPU Type */
  71
  72 #define SNI_IDPROM_SIZE 0x1000
  73
  74 #ifdef DEBUG
  75 static void __init sni_idprom_dump(void)
  76 {
  77         int     i;
  78
  79         pr_debug("SNI IDProm dump:\n");
  80         for (i = 0; i < 256; i++) {
  81                 if (i%16 == 0)
  82                         pr_debug("%04x ", i);
  83
  84                 printk("%02x ", *(unsigned char *) (SNI_IDPROM_BASE + i));
  85
  86                 if (i % 16 == 15)
  87                         printk("\n");
  88         }
  89 }
  90 #endif
  91
  92 static void __init sni_mem_init(void )
  93 {
  94         int i, memsize;
  95         struct membank {
  96                 u32             size;
  97                 u32             base;
  98                 u32             size2;
  99                 u32             pad1;
 100                 u32             pad2;
 101         } memconf[8];
 102
 103         /* MemSIZE from prom in 16MByte chunks */
 104         memsize = *((unsigned char *) SNI_IDPROM_MEMSIZE) * 16;
 105
 106         pr_debug("IDProm memsize: %lu MByte\n", memsize);
 107
 108         /* get memory bank layout from prom */
 109         __prom_get_memconf(&memconf);
 110
 111         pr_debug("prom_get_mem_conf memory configuration:\n");
 112         for (i = 0;i < 8 && memconf[i].size; i++) {
 113                 if (sni_brd_type == SNI_BRD_PCI_TOWER ||
 114                     sni_brd_type == SNI_BRD_PCI_TOWER_CPLUS) {
 115                         if (memconf[i].base >= 0x20000000 &&
 116                             memconf[i].base <  0x30000000) {
 117                                 memconf[i].base -= 0x20000000;
 118                         }
 119         }
 120                 pr_debug("Bank%d: %08x @ %08x\n", i,
 121                         memconf[i].size, memconf[i].base);
 122                 add_memory_region(memconf[i].base, memconf[i].size, BOOT_MEM_RAM);
 123         }
 124 }
 125
 126 static void __init sni_console_setup(void)
 127 {
 128         char *ctype;
 129         char *cdev;
 130         char *baud;
 131         int port;
 132         static char options[8];
 133
 134         cdev = prom_getenv ("console_dev");
 135         if (strncmp (cdev, "tty", 3) == 0) {
 136                 ctype = prom_getenv ("console");
 137                 switch (*ctype) {
 138                 default:
 139                 case 'l':
 140                         port = 0;
 141                         baud = prom_getenv("lbaud");
 142                         break;
 143                 case 'r':
 144                         port = 1;
 145                         baud = prom_getenv("rbaud");
 146                         break;
 147                 }
 148                 if (baud)
 149                         strcpy(options, baud);
 150                 if (strncmp (cdev, "tty552", 6) == 0)
 151                         add_preferred_console("ttyS", port, baud ? options : NULL);
 152                 else
 153                         add_preferred_console("ttySC", port, baud ? options : NULL);
 154         }
 155 }
 156
 157 void __init prom_init(void)
 158 {
 159         int argc = fw_arg0;
 160         char **argv = (void *)fw_arg1;
 161         int i;
 162         int cputype;
 163
 164         sni_brd_type = *(unsigned char *)SNI_IDPROM_BRDTYPE;
 165         cputype = *(unsigned char *)SNI_IDPROM_CPUTYPE;
 166         switch (sni_brd_type) {
 167         case SNI_BRD_TOWER_OASIC:
 168                 switch (cputype) {
 169                 case SNI_CPU_M8030:
 170                         systype = "RM400-330";
 171                         break;
 172                 case SNI_CPU_M8031:
 173                         systype = "RM400-430";
 174                         break;
 175                 case SNI_CPU_M8037:
 176                         systype = "RM400-530";
 177                         break;
 178                 case SNI_CPU_M8034:
 179                         systype = "RM400-730";
 180                         break;
 181                 default:
 182                         systype = "RM400-xxx";
 183                         break;
 184                 }
 185                 break;
 186         case SNI_BRD_MINITOWER:
 187                 switch (cputype) {
 188                 case SNI_CPU_M8021:
 189                 case SNI_CPU_M8043:
 190                         systype = "RM400-120";
 191                         break;
 192                 case SNI_CPU_M8040:
 193                         systype = "RM400-220";
 194                         break;
 195                 case SNI_CPU_M8053:
 196                         systype = "RM400-225";
 197                         break;
 198                 case SNI_CPU_M8050:
 199                         systype = "RM400-420";
 200                         break;
 201                 default:
 202                         systype = "RM400-xxx";
 203                         break;
 204                 }
 205                 break;
 206         case SNI_BRD_PCI_TOWER:
 207                 systype = "RM400-Cxx";
 208                 break;
 209         case SNI_BRD_RM200:
 210                 systype = "RM200-xxx";
 211                 break;
 212         case SNI_BRD_PCI_MTOWER:
 213                 systype = "RM300-Cxx";
 214                 break;
 215         case SNI_BRD_PCI_DESKTOP:
 216                 switch (read_c0_prid() & 0xff00) {
 217                 case PRID_IMP_R4600:
 218                 case PRID_IMP_R4700:
 219                         systype = "RM200-C20";
 220                         break;
 221                 case PRID_IMP_R5000:
 222                         systype = "RM200-C40";
 223                         break;
 224                 default:
 225                         systype = "RM200-Cxx";
 226                         break;
 227                 }
 228                 break;
 229         case SNI_BRD_PCI_TOWER_CPLUS:
 230                 systype = "RM400-Exx";
 231                 break;
 232         case SNI_BRD_PCI_MTOWER_CPLUS:
 233                 systype = "RM300-Exx";
 234                 break;
 235         }
 236         pr_debug("Found SNI brdtype %02x name %s\n", sni_brd_type,systype);
 237
 238 #ifdef DEBUG
 239         sni_idprom_dump();
 240 #endif
 241         sni_mem_init();
 242         sni_console_setup();
 243
 244         /* copy prom cmdline parameters to kernel cmdline */
 245         for (i = 1; i < argc; i++) {
 246                 strcat(arcs_cmdline, argv[i]);
 247                 if (i < (argc - 1))
 248                         strcat(arcs_cmdline, " ");
 249         }
 250 }
 251