arch/frv/kernel/setup.c

   1 /* setup.c: FRV specific setup
   2  *
   3  * Copyright (C) 2003-5 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  * - Derived from arch/m68k/kernel/setup.c
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version
  10  * 2 of the License, or (at your option) any later version.
  11  */
  12
  13 #include <linux/version.h>
  14 #include <linux/kernel.h>
  15 #include <linux/sched.h>
  16 #include <linux/delay.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/fs.h>
  19 #include <linux/mm.h>
  20 #include <linux/fb.h>
  21 #include <linux/console.h>
  22 #include <linux/genhd.h>
  23 #include <linux/errno.h>
  24 #include <linux/string.h>
  25 #include <linux/major.h>
  26 #include <linux/bootmem.h>
  27 #include <linux/highmem.h>
  28 #include <linux/seq_file.h>
  29 #include <linux/serial.h>
  30 #include <linux/serial_core.h>
  31 #include <linux/serial_reg.h>
  32
  33 #include <asm/setup.h>
  34 #include <asm/serial.h>
  35 #include <asm/irq.h>
  36 #include <asm/sections.h>
  37 #include <asm/pgalloc.h>
  38 #include <asm/busctl-regs.h>
  39 #include <asm/serial-regs.h>
  40 #include <asm/timer-regs.h>
  41 #include <asm/irc-regs.h>
  42 #include <asm/spr-regs.h>
  43 #include <asm/mb-regs.h>
  44 #include <asm/mb93493-regs.h>
  45 #include <asm/gdb-stub.h>
  46 #include <asm/irq-routing.h>
  47 #include <asm/io.h>
  48
  49 #ifdef CONFIG_BLK_DEV_INITRD
  50 #include <linux/blk.h>
  51 #include <asm/pgtable.h>
  52 #endif
  53
  54 #include "local.h"
  55
  56 #ifdef CONFIG_MB93090_MB00
  57 static void __init mb93090_display(void);
  58 #endif
  59 #ifdef CONFIG_MMU
  60 static void __init setup_linux_memory(void);
  61 #else
  62 static void __init setup_uclinux_memory(void);
  63 #endif
  64
  65 #ifdef CONFIG_CONSOLE
  66 extern struct consw *conswitchp;
  67 #endif
  68
  69 #ifdef CONFIG_MB93090_MB00
  70 static char __initdata mb93090_banner[] = "FJ/RH FR-V Linux";
  71 static char __initdata mb93090_version[] = UTS_RELEASE;
  72
  73 int __nongprelbss mb93090_mb00_detected;
  74 #endif
  75
  76 const char __frv_unknown_system[] = "unknown";
  77 const char __frv_mb93091_cb10[] = "mb93091-cb10";
  78 const char __frv_mb93091_cb11[] = "mb93091-cb11";
  79 const char __frv_mb93091_cb30[] = "mb93091-cb30";
  80 const char __frv_mb93091_cb41[] = "mb93091-cb41";
  81 const char __frv_mb93091_cb60[] = "mb93091-cb60";
  82 const char __frv_mb93091_cb70[] = "mb93091-cb70";
  83 const char __frv_mb93091_cb451[] = "mb93091-cb451";
  84 const char __frv_mb93090_mb00[] = "mb93090-mb00";
  85
  86 const char __frv_mb93493[] = "mb93493";
  87
  88 const char __frv_mb93093[] = "mb93093";
  89
  90 static const char *__nongprelbss cpu_series;
  91 static const char *__nongprelbss cpu_core;
  92 static const char *__nongprelbss cpu_silicon;
  93 static const char *__nongprelbss cpu_mmu;
  94 static const char *__nongprelbss cpu_system;
  95 static const char *__nongprelbss cpu_board1;
  96 static const char *__nongprelbss cpu_board2;
  97
  98 static unsigned long __nongprelbss cpu_psr_all;
  99 static unsigned long __nongprelbss cpu_hsr0_all;
 100
 101 unsigned long __nongprelbss pdm_suspend_mode;
 102
 103 unsigned long __nongprelbss rom_length;
 104 unsigned long __nongprelbss memory_start;
 105 unsigned long __nongprelbss memory_end;
 106
 107 unsigned long __nongprelbss dma_coherent_mem_start;
 108 unsigned long __nongprelbss dma_coherent_mem_end;
 109
 110 unsigned long __initdata __sdram_old_base;
 111 unsigned long __initdata num_mappedpages;
 112
 113 struct cpuinfo_frv __nongprelbss boot_cpu_data;
 114
 115 char command_line[COMMAND_LINE_SIZE];
 116 char __initdata redboot_command_line[COMMAND_LINE_SIZE];
 117
 118 #ifdef CONFIG_PM
 119 #define __pminit
 120 #define __pminitdata
 121 #else
 122 #define __pminit __init
 123 #define __pminitdata __initdata
 124 #endif
 125
 126 struct clock_cmode {
 127         uint8_t xbus, sdram, corebus, core, dsu;
 128 };
 129
 130 #define _frac(N,D) ((N)<<4 | (D))
 131 #define _x0_16  _frac(1,6)
 132 #define _x0_25  _frac(1,4)
 133 #define _x0_33  _frac(1,3)
 134 #define _x0_375 _frac(3,8)
 135 #define _x0_5   _frac(1,2)
 136 #define _x0_66  _frac(2,3)
 137 #define _x0_75  _frac(3,4)
 138 #define _x1     _frac(1,1)
 139 #define _x1_5   _frac(3,2)
 140 #define _x2     _frac(2,1)
 141 #define _x3     _frac(3,1)
 142 #define _x4     _frac(4,1)
 143 #define _x4_5   _frac(9,2)
 144 #define _x6     _frac(6,1)
 145 #define _x8     _frac(8,1)
 146 #define _x9     _frac(9,1)
 147
 148 int __nongprelbss clock_p0_current;
 149 int __nongprelbss clock_cm_current;
 150 int __nongprelbss clock_cmode_current;
 151 #ifdef CONFIG_PM
 152 int __nongprelbss clock_cmodes_permitted;
 153 unsigned long __nongprelbss clock_bits_settable;
 154 #endif
 155
 156 static struct clock_cmode __pminitdata undef_clock_cmode = { _x1, _x1, _x1, _x1, _x1 };
 157
 158 static struct clock_cmode __pminitdata clock_cmodes_fr401_fr403[16] = {
 159         [4]     = {     _x1,    _x1,    _x2,    _x2,    _x0_25  },
 160         [5]     = {     _x1,    _x2,    _x4,    _x4,    _x0_5   },
 161         [8]     = {     _x1,    _x1,    _x1,    _x2,    _x0_25  },
 162         [9]     = {     _x1,    _x2,    _x2,    _x4,    _x0_5   },
 163         [11]    = {     _x1,    _x4,    _x4,    _x8,    _x1     },
 164         [12]    = {     _x1,    _x1,    _x2,    _x4,    _x0_5   },
 165         [13]    = {     _x1,    _x2,    _x4,    _x8,    _x1     },
 166 };
 167
 168 static struct clock_cmode __pminitdata clock_cmodes_fr405[16] = {
 169         [0]     = {     _x1,    _x1,    _x1,    _x1,    _x0_5   },
 170         [1]     = {     _x1,    _x1,    _x1,    _x3,    _x0_25  },
 171         [2]     = {     _x1,    _x1,    _x2,    _x6,    _x0_5   },
 172         [3]     = {     _x1,    _x2,    _x2,    _x6,    _x0_5   },
 173         [4]     = {     _x1,    _x1,    _x2,    _x2,    _x0_16  },
 174         [8]     = {     _x1,    _x1,    _x1,    _x2,    _x0_16  },
 175         [9]     = {     _x1,    _x2,    _x2,    _x4,    _x0_33  },
 176         [12]    = {     _x1,    _x1,    _x2,    _x4,    _x0_33  },
 177         [14]    = {     _x1,    _x3,    _x3,    _x9,    _x0_75  },
 178         [15]    = {     _x1,    _x1_5,  _x1_5,  _x4_5,  _x0_375 },
 179
 180 #define CLOCK_CMODES_PERMITTED_FR405 0xd31f
 181 };
 182
 183 static struct clock_cmode __pminitdata clock_cmodes_fr555[16] = {
 184         [0]     = {     _x1,    _x2,    _x2,    _x4,    _x0_33  },
 185         [1]     = {     _x1,    _x3,    _x3,    _x6,    _x0_5   },
 186         [2]     = {     _x1,    _x2,    _x4,    _x8,    _x0_66  },
 187         [3]     = {     _x1,    _x1_5,  _x3,    _x6,    _x0_5   },
 188         [4]     = {     _x1,    _x3,    _x3,    _x9,    _x0_75  },
 189         [5]     = {     _x1,    _x2,    _x2,    _x6,    _x0_5   },
 190         [6]     = {     _x1,    _x1_5,  _x1_5,  _x4_5,  _x0_375 },
 191 };
 192
 193 static const struct clock_cmode __pminitdata *clock_cmodes;
 194 static int __pminitdata clock_doubled;
 195
 196 static struct uart_port __initdata __frv_uart0 = {
 197         .uartclk                = 0,
 198         .membase                = (char *) UART0_BASE,
 199         .irq                    = IRQ_CPU_UART0,
 200         .regshift               = 3,
 201         .iotype                 = UPIO_MEM,
 202         .flags                  = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 203 };
 204
 205 static struct uart_port __initdata __frv_uart1 = {
 206         .uartclk                = 0,
 207         .membase                = (char *) UART1_BASE,
 208         .irq                    = IRQ_CPU_UART1,
 209         .regshift               = 3,
 210         .iotype                 = UPIO_MEM,
 211         .flags                  = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 212 };
 213
 214 #if 0
 215 static void __init printk_xampr(unsigned long ampr, unsigned long amlr, char i_d, int n)
 216 {
 217         unsigned long phys, virt, cxn, size;
 218
 219 #ifdef CONFIG_MMU
 220         virt = amlr & 0xffffc000;
 221         cxn = amlr & 0x3fff;
 222 #else
 223         virt = ampr & 0xffffc000;
 224         cxn = 0;
 225 #endif
 226         phys = ampr & xAMPRx_PPFN;
 227         size = 1 << (((ampr & xAMPRx_SS) >> 4) + 17);
 228
 229         printk("%cAMPR%d: va %08lx-%08lx [pa %08lx] %c%c%c%c [cxn:%04lx]\n",
 230                i_d, n,
 231                virt, virt + size - 1,
 232                phys,
 233                ampr & xAMPRx_S  ? 'S' : '-',
 234                ampr & xAMPRx_C  ? 'C' : '-',
 235                ampr & DAMPRx_WP ? 'W' : '-',
 236                ampr & xAMPRx_V  ? 'V' : '-',
 237                cxn
 238                );
 239 }
 240 #endif
 241
 242 /*****************************************************************************/
 243 /*
 244  * dump the memory map
 245  */
 246 static void __init dump_memory_map(void)
 247 {
 248
 249 #if 0
 250         /* dump the protection map */
 251         printk_xampr(__get_IAMPR(0),  __get_IAMLR(0),  'I', 0);
 252         printk_xampr(__get_IAMPR(1),  __get_IAMLR(1),  'I', 1);
 253         printk_xampr(__get_IAMPR(2),  __get_IAMLR(2),  'I', 2);
 254         printk_xampr(__get_IAMPR(3),  __get_IAMLR(3),  'I', 3);
 255         printk_xampr(__get_IAMPR(4),  __get_IAMLR(4),  'I', 4);
 256         printk_xampr(__get_IAMPR(5),  __get_IAMLR(5),  'I', 5);
 257         printk_xampr(__get_IAMPR(6),  __get_IAMLR(6),  'I', 6);
 258         printk_xampr(__get_IAMPR(7),  __get_IAMLR(7),  'I', 7);
 259         printk_xampr(__get_IAMPR(8),  __get_IAMLR(8),  'I', 8);
 260         printk_xampr(__get_IAMPR(9),  __get_IAMLR(9),  'i', 9);
 261         printk_xampr(__get_IAMPR(10), __get_IAMLR(10), 'I', 10);
 262         printk_xampr(__get_IAMPR(11), __get_IAMLR(11), 'I', 11);
 263         printk_xampr(__get_IAMPR(12), __get_IAMLR(12), 'I', 12);
 264         printk_xampr(__get_IAMPR(13), __get_IAMLR(13), 'I', 13);
 265         printk_xampr(__get_IAMPR(14), __get_IAMLR(14), 'I', 14);
 266         printk_xampr(__get_IAMPR(15), __get_IAMLR(15), 'I', 15);
 267
 268         printk_xampr(__get_DAMPR(0),  __get_DAMLR(0),  'D', 0);
 269         printk_xampr(__get_DAMPR(1),  __get_DAMLR(1),  'D', 1);
 270         printk_xampr(__get_DAMPR(2),  __get_DAMLR(2),  'D', 2);
 271         printk_xampr(__get_DAMPR(3),  __get_DAMLR(3),  'D', 3);
 272         printk_xampr(__get_DAMPR(4),  __get_DAMLR(4),  'D', 4);
 273         printk_xampr(__get_DAMPR(5),  __get_DAMLR(5),  'D', 5);
 274         printk_xampr(__get_DAMPR(6),  __get_DAMLR(6),  'D', 6);
 275         printk_xampr(__get_DAMPR(7),  __get_DAMLR(7),  'D', 7);
 276         printk_xampr(__get_DAMPR(8),  __get_DAMLR(8),  'D', 8);
 277         printk_xampr(__get_DAMPR(9),  __get_DAMLR(9),  'D', 9);
 278         printk_xampr(__get_DAMPR(10), __get_DAMLR(10), 'D', 10);
 279         printk_xampr(__get_DAMPR(11), __get_DAMLR(11), 'D', 11);
 280         printk_xampr(__get_DAMPR(12), __get_DAMLR(12), 'D', 12);
 281         printk_xampr(__get_DAMPR(13), __get_DAMLR(13), 'D', 13);
 282         printk_xampr(__get_DAMPR(14), __get_DAMLR(14), 'D', 14);
 283         printk_xampr(__get_DAMPR(15), __get_DAMLR(15), 'D', 15);
 284 #endif
 285
 286 #if 0
 287         /* dump the bus controller registers */
 288         printk("LGCR: %08lx\n", __get_LGCR());
 289         printk("Master: %08lx-%08lx CR=%08lx\n",
 290                __get_LEMBR(), __get_LEMBR() + __get_LEMAM(),
 291                __get_LMAICR());
 292
 293         int loop;
 294         for (loop = 1; loop <= 7; loop++) {
 295                 unsigned long lcr = __get_LCR(loop), lsbr = __get_LSBR(loop);
 296                 printk("CS#%d: %08lx-%08lx %c%c%c%c%c%c%c%c%c\n",
 297                        loop,
 298                        lsbr, lsbr + __get_LSAM(loop),
 299                        lcr & 0x80000000 ? 'r' : '-',
 300                        lcr & 0x40000000 ? 'w' : '-',
 301                        lcr & 0x08000000 ? 'b' : '-',
 302                        lcr & 0x04000000 ? 'B' : '-',
 303                        lcr & 0x02000000 ? 'C' : '-',
 304                        lcr & 0x01000000 ? 'D' : '-',
 305                        lcr & 0x00800000 ? 'W' : '-',
 306                        lcr & 0x00400000 ? 'R' : '-',
 307                        (lcr & 0x00030000) == 0x00000000 ? '4' :
 308                        (lcr & 0x00030000) == 0x00010000 ? '2' :
 309                        (lcr & 0x00030000) == 0x00020000 ? '1' :
 310                        '-'
 311                        );
 312         }
 313 #endif
 314
 315 #if 0
 316         printk("\n");
 317 #endif
 318 } /* end dump_memory_map() */
 319
 320 /*****************************************************************************/
 321 /*
 322  * attempt to detect a VDK motherboard and DAV daughter board on an MB93091 system
 323  */
 324 #ifdef CONFIG_MB93091_VDK
 325 static void __init detect_mb93091(void)
 326 {
 327 #ifdef CONFIG_MB93090_MB00
 328         /* Detect CB70 without motherboard */
 329         if (!(cpu_system == __frv_mb93091_cb70 && ((*(unsigned short *)0xffc00030) & 0x100))) {
 330                 cpu_board1 = __frv_mb93090_mb00;
 331                 mb93090_mb00_detected = 1;
 332         }
 333 #endif
 334
 335 #ifdef CONFIG_FUJITSU_MB93493
 336         cpu_board2 = __frv_mb93493;
 337 #endif
 338
 339 } /* end detect_mb93091() */
 340 #endif
 341
 342 /*****************************************************************************/
 343 /*
 344  * determine the CPU type and set appropriate parameters
 345  *
 346  * Family     Series      CPU Core    Silicon    Imple  Vers
 347  * ----------------------------------------------------------
 348  * FR-V --+-> FR400 --+-> FR401 --+-> MB93401     02     00 [1]
 349  *        |           |           |
 350  *        |           |           +-> MB93401/A   02     01
 351  *        |           |           |
 352  *        |           |           +-> MB93403     02     02
 353  *        |           |
 354  *        |           +-> FR405 ----> MB93405     04     00
 355  *        |
 356  *        +-> FR450 ----> FR451 ----> MB93451     05     00
 357  *        |
 358  *        +-> FR500 ----> FR501 --+-> MB93501     01     01 [2]
 359  *        |                       |
 360  *        |                       +-> MB93501/A   01     02
 361  *        |
 362  *        +-> FR550 --+-> FR551 ----> MB93555     03     01
 363  *
 364  *  [1] The MB93401 is an obsolete CPU replaced by the MB93401A
 365  *  [2] The MB93501 is an obsolete CPU replaced by the MB93501A
 366  *
 367  * Imple is PSR(Processor Status Register)[31:28].
 368  * Vers is PSR(Processor Status Register)[27:24].
 369  *
 370  * A "Silicon" consists of CPU core and some on-chip peripherals.
 371  */
 372 static void __init determine_cpu(void)
 373 {
 374         unsigned long hsr0 = __get_HSR(0);
 375         unsigned long psr = __get_PSR();
 376
 377         /* work out what selectable services the CPU supports */
 378         __set_PSR(psr | PSR_EM | PSR_EF | PSR_CM | PSR_NEM);
 379         cpu_psr_all = __get_PSR();
 380         __set_PSR(psr);
 381
 382         __set_HSR(0, hsr0 | HSR0_GRLE | HSR0_GRHE | HSR0_FRLE | HSR0_FRHE);
 383         cpu_hsr0_all = __get_HSR(0);
 384         __set_HSR(0, hsr0);
 385
 386         /* derive other service specs from the CPU type */
 387         cpu_series              = "unknown";
 388         cpu_core                = "unknown";
 389         cpu_silicon             = "unknown";
 390         cpu_mmu                 = "Prot";
 391         cpu_system              = __frv_unknown_system;
 392         clock_cmodes            = NULL;
 393         clock_doubled           = 0;
 394 #ifdef CONFIG_PM
 395         clock_bits_settable     = CLOCK_BIT_CM_H | CLOCK_BIT_CM_M | CLOCK_BIT_P0;
 396 #endif
 397
 398         switch (PSR_IMPLE(psr)) {
 399         case PSR_IMPLE_FR401:
 400                 cpu_series      = "fr400";
 401                 cpu_core        = "fr401";
 402                 pdm_suspend_mode = HSR0_PDM_PLL_RUN;
 403
 404                 switch (PSR_VERSION(psr)) {
 405                 case PSR_VERSION_FR401_MB93401:
 406                         cpu_silicon     = "mb93401";
 407                         cpu_system      = __frv_mb93091_cb10;
 408                         clock_cmodes    = clock_cmodes_fr401_fr403;
 409                         clock_doubled   = 1;
 410                         break;
 411                 case PSR_VERSION_FR401_MB93401A:
 412                         cpu_silicon     = "mb93401/A";
 413                         cpu_system      = __frv_mb93091_cb11;
 414                         clock_cmodes    = clock_cmodes_fr401_fr403;
 415                         break;
 416                 case PSR_VERSION_FR401_MB93403:
 417                         cpu_silicon     = "mb93403";
 418 #ifndef CONFIG_MB93093_PDK
 419                         cpu_system      = __frv_mb93091_cb30;
 420 #else
 421                         cpu_system      = __frv_mb93093;
 422 #endif
 423                         clock_cmodes    = clock_cmodes_fr401_fr403;
 424                         break;
 425                 default:
 426                         break;
 427                 }
 428                 break;
 429
 430         case PSR_IMPLE_FR405:
 431                 cpu_series      = "fr400";
 432                 cpu_core        = "fr405";
 433                 pdm_suspend_mode = HSR0_PDM_PLL_STOP;
 434
 435                 switch (PSR_VERSION(psr)) {
 436                 case PSR_VERSION_FR405_MB93405:
 437                         cpu_silicon     = "mb93405";
 438                         cpu_system      = __frv_mb93091_cb60;
 439                         clock_cmodes    = clock_cmodes_fr405;
 440 #ifdef CONFIG_PM
 441                         clock_bits_settable |= CLOCK_BIT_CMODE;
 442                         clock_cmodes_permitted = CLOCK_CMODES_PERMITTED_FR405;
 443 #endif
 444
 445                         /* the FPGA on the CB70 has extra registers
 446                          * - it has 0x0046 in the VDK_ID FPGA register at 0x1a0, which is
 447                          *   how we tell the difference between it and a CB60
 448                          */
 449                         if (*(volatile unsigned short *) 0xffc001a0 == 0x0046)
 450                                 cpu_system = __frv_mb93091_cb70;
 451                         break;
 452                 default:
 453                         break;
 454                 }
 455                 break;
 456
 457         case PSR_IMPLE_FR451:
 458                 cpu_series      = "fr450";
 459                 cpu_core        = "fr451";
 460                 pdm_suspend_mode = HSR0_PDM_PLL_STOP;
 461 #ifdef CONFIG_PM
 462                 clock_bits_settable |= CLOCK_BIT_CMODE;
 463                 clock_cmodes_permitted = CLOCK_CMODES_PERMITTED_FR405;
 464 #endif
 465                 switch (PSR_VERSION(psr)) {
 466                 case PSR_VERSION_FR451_MB93451:
 467                         cpu_silicon     = "mb93451";
 468                         cpu_mmu         = "Prot, SAT, xSAT, DAT";
 469                         cpu_system      = __frv_mb93091_cb451;
 470                         clock_cmodes    = clock_cmodes_fr405;
 471                         break;
 472                 default:
 473                         break;
 474                 }
 475                 break;
 476
 477         case PSR_IMPLE_FR501:
 478                 cpu_series      = "fr500";
 479                 cpu_core        = "fr501";
 480                 pdm_suspend_mode = HSR0_PDM_PLL_STOP;
 481
 482                 switch (PSR_VERSION(psr)) {
 483                 case PSR_VERSION_FR501_MB93501:  cpu_silicon = "mb93501";   break;
 484                 case PSR_VERSION_FR501_MB93501A: cpu_silicon = "mb93501/A"; break;
 485                 default:
 486                         break;
 487                 }
 488                 break;
 489
 490         case PSR_IMPLE_FR551:
 491                 cpu_series      = "fr550";
 492                 cpu_core        = "fr551";
 493                 pdm_suspend_mode = HSR0_PDM_PLL_RUN;
 494
 495                 switch (PSR_VERSION(psr)) {
 496                 case PSR_VERSION_FR551_MB93555:
 497                         cpu_silicon     = "mb93555";
 498                         cpu_mmu         = "Prot, SAT";
 499                         cpu_system      = __frv_mb93091_cb41;
 500                         clock_cmodes    = clock_cmodes_fr555;
 501                         clock_doubled   = 1;
 502                         break;
 503                 default:
 504                         break;
 505                 }
 506                 break;
 507
 508         default:
 509                 break;
 510         }
 511
 512         printk("- Series:%s CPU:%s Silicon:%s\n",
 513                cpu_series, cpu_core, cpu_silicon);
 514
 515 #ifdef CONFIG_MB93091_VDK
 516         detect_mb93091();
 517 #endif
 518
 519 #if defined(CONFIG_MB93093_PDK) && defined(CONFIG_FUJITSU_MB93493)
 520         cpu_board2 = __frv_mb93493;
 521 #endif
 522
 523 } /* end determine_cpu() */
 524
 525 /*****************************************************************************/
 526 /*
 527  * calculate the bus clock speed
 528  */
 529 void __pminit determine_clocks(int verbose)
 530 {
 531         const struct clock_cmode *mode, *tmode;
 532         unsigned long clkc, psr, quot;
 533
 534         clkc = __get_CLKC();
 535         psr = __get_PSR();
 536
 537         clock_p0_current = !!(clkc & CLKC_P0);
 538         clock_cm_current = clkc & CLKC_CM;
 539         clock_cmode_current = (clkc & CLKC_CMODE) >> CLKC_CMODE_s;
 540
 541         if (verbose)
 542                 printk("psr=%08lx hsr0=%08lx clkc=%08lx\n", psr, __get_HSR(0), clkc);
 543
 544         /* the CB70 has some alternative ways of setting the clock speed through switches accessed
 545          * through the FPGA.  */
 546         if (cpu_system == __frv_mb93091_cb70) {
 547                 unsigned short clkswr = *(volatile unsigned short *) 0xffc00104UL & 0x1fffUL;
 548
 549                 if (clkswr & 0x1000)
 550                         __clkin_clock_speed_HZ = 60000000UL;
 551                 else
 552                         __clkin_clock_speed_HZ =
 553                                 ((clkswr >> 8) & 0xf) * 10000000 +
 554                                 ((clkswr >> 4) & 0xf) * 1000000 +
 555                                 ((clkswr     ) & 0xf) * 100000;
 556         }
 557         /* the FR451 is currently fixed at 24MHz */
 558         else if (cpu_system == __frv_mb93091_cb451) {
 559                 //__clkin_clock_speed_HZ = 24000000UL; // CB451-FPGA
 560                 unsigned short clkswr = *(volatile unsigned short *) 0xffc00104UL & 0x1fffUL;
 561
 562                 if (clkswr & 0x1000)
 563                         __clkin_clock_speed_HZ = 60000000UL;
 564                 else
 565                         __clkin_clock_speed_HZ =
 566                                 ((clkswr >> 8) & 0xf) * 10000000 +
 567                                 ((clkswr >> 4) & 0xf) * 1000000 +
 568                                 ((clkswr     ) & 0xf) * 100000;
 569         }
 570         /* otherwise determine the clockspeed from VDK or other registers */
 571         else {
 572                 __clkin_clock_speed_HZ = __get_CLKIN();
 573         }
 574
 575         /* look up the appropriate clock relationships table entry */
 576         mode = &undef_clock_cmode;
 577         if (clock_cmodes) {
 578                 tmode = &clock_cmodes[(clkc & CLKC_CMODE) >> CLKC_CMODE_s];
 579                 if (tmode->xbus)
 580                         mode = tmode;
 581         }
 582
 583 #define CLOCK(SRC,RATIO) ((SRC) * (((RATIO) >> 4) & 0x0f) / ((RATIO) & 0x0f))
 584
 585         if (clock_doubled)
 586                 __clkin_clock_speed_HZ <<= 1;
 587
 588         __ext_bus_clock_speed_HZ        = CLOCK(__clkin_clock_speed_HZ, mode->xbus);
 589         __sdram_clock_speed_HZ          = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
 590         __dsu_clock_speed_HZ            = CLOCK(__clkin_clock_speed_HZ, mode->dsu);
 591
 592         switch (clkc & CLKC_CM) {
 593         case 0: /* High */
 594                 __core_bus_clock_speed_HZ       = CLOCK(__clkin_clock_speed_HZ, mode->corebus);
 595                 __core_clock_speed_HZ           = CLOCK(__clkin_clock_speed_HZ, mode->core);
 596                 break;
 597         case 1: /* Medium */
 598                 __core_bus_clock_speed_HZ       = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
 599                 __core_clock_speed_HZ           = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
 600                 break;
 601         case 2: /* Low; not supported */
 602         case 3: /* UNDEF */
 603                 printk("Unsupported CLKC CM %ld\n", clkc & CLKC_CM);
 604                 panic("Bye");
 605         }
 606
 607         __res_bus_clock_speed_HZ = __ext_bus_clock_speed_HZ;
 608         if (clkc & CLKC_P0)
 609                 __res_bus_clock_speed_HZ >>= 1;
 610
 611         if (verbose) {
 612                 printk("CLKIN: %lu.%3.3luMHz\n",
 613                        __clkin_clock_speed_HZ / 1000000,
 614                        (__clkin_clock_speed_HZ / 1000) % 1000);
 615
 616                 printk("CLKS:"
 617                        " ext=%luMHz res=%luMHz sdram=%luMHz cbus=%luMHz core=%luMHz dsu=%luMHz\n",
 618                        __ext_bus_clock_speed_HZ / 1000000,
 619                        __res_bus_clock_speed_HZ / 1000000,
 620                        __sdram_clock_speed_HZ / 1000000,
 621                        __core_bus_clock_speed_HZ / 1000000,
 622                        __core_clock_speed_HZ / 1000000,
 623                        __dsu_clock_speed_HZ / 1000000
 624                        );
 625         }
 626
 627         /* calculate the number of __delay() loop iterations per sec (2 insn loop) */
 628         __delay_loops_MHz = __core_clock_speed_HZ / (1000000 * 2);
 629
 630         /* set the serial prescaler */
 631         __serial_clock_speed_HZ = __res_bus_clock_speed_HZ;
 632         quot = 1;
 633         while (__serial_clock_speed_HZ / quot / 16 / 65536 > 3000)
 634                 quot += 1;
 635
 636         /* double the divisor if P0 is clear, so that if/when P0 is set, it's still achievable
 637          * - we have to be careful - dividing too much can mean we can't get 115200 baud
 638          */
 639         if (__serial_clock_speed_HZ > 32000000 && !(clkc & CLKC_P0))
 640                 quot <<= 1;
 641
 642         __serial_clock_speed_HZ /= quot;
 643         __frv_uart0.uartclk = __serial_clock_speed_HZ;
 644         __frv_uart1.uartclk = __serial_clock_speed_HZ;
 645
 646         if (verbose)
 647                 printk("      uart=%luMHz\n", __serial_clock_speed_HZ / 1000000 * quot);
 648
 649         while (!(__get_UART0_LSR() & UART_LSR_TEMT))
 650                 continue;
 651
 652         while (!(__get_UART1_LSR() & UART_LSR_TEMT))
 653                 continue;
 654
 655         __set_UCPVR(quot);
 656         __set_UCPSR(0);
 657 } /* end determine_clocks() */
 658
 659 /*****************************************************************************/
 660 /*
 661  * reserve some DMA consistent memory
 662  */
 663 #ifdef CONFIG_RESERVE_DMA_COHERENT
 664 static void __init reserve_dma_coherent(void)
 665 {
 666         unsigned long ampr;
 667
 668         /* find the first non-kernel memory tile and steal it */
 669 #define __steal_AMPR(r)                                         \
 670         if (__get_DAMPR(r) & xAMPRx_V) {                        \
 671                 ampr = __get_DAMPR(r);                          \
 672                 __set_DAMPR(r, ampr | xAMPRx_S | xAMPRx_C);     \
 673                 __set_IAMPR(r, 0);                              \
 674                 goto found;                                     \
 675         }
 676
 677         __steal_AMPR(1);
 678         __steal_AMPR(2);
 679         __steal_AMPR(3);
 680         __steal_AMPR(4);
 681         __steal_AMPR(5);
 682         __steal_AMPR(6);
 683
 684         if (PSR_IMPLE(__get_PSR()) == PSR_IMPLE_FR551) {
 685                 __steal_AMPR(7);
 686                 __steal_AMPR(8);
 687                 __steal_AMPR(9);
 688                 __steal_AMPR(10);
 689                 __steal_AMPR(11);
 690                 __steal_AMPR(12);
 691                 __steal_AMPR(13);
 692                 __steal_AMPR(14);
 693         }
 694
 695         /* unable to grant any DMA consistent memory */
 696         printk("No DMA consistent memory reserved\n");
 697         return;
 698
 699  found:
 700         dma_coherent_mem_start = ampr & xAMPRx_PPFN;
 701         ampr &= xAMPRx_SS;
 702         ampr >>= 4;
 703         ampr = 1 << (ampr - 3 + 20);
 704         dma_coherent_mem_end = dma_coherent_mem_start + ampr;
 705
 706         printk("DMA consistent memory reserved %lx-%lx\n",
 707                dma_coherent_mem_start, dma_coherent_mem_end);
 708
 709 } /* end reserve_dma_coherent() */
 710 #endif
 711
 712 /*****************************************************************************/
 713 /*
 714  * calibrate the delay loop
 715  */
 716 void __init calibrate_delay(void)
 717 {
 718         loops_per_jiffy = __delay_loops_MHz * (1000000 / HZ);
 719
 720         printk("Calibrating delay loop... %lu.%02lu BogoMIPS\n",
 721                loops_per_jiffy / (500000 / HZ),
 722                (loops_per_jiffy / (5000 / HZ)) % 100);
 723
 724 } /* end calibrate_delay() */
 725
 726 /*****************************************************************************/
 727 /*
 728  * look through the command line for some things we need to know immediately
 729  */
 730 static void __init parse_cmdline_early(char *cmdline)
 731 {
 732         if (!cmdline)
 733                 return;
 734
 735         while (*cmdline) {
 736                 if (*cmdline == ' ')
 737                         cmdline++;
 738
 739                 /* "mem=XXX[kKmM]" sets SDRAM size to <mem>, overriding the value we worked
 740                  * out from the SDRAM controller mask register
 741                  */
 742                 if (!memcmp(cmdline, "mem=", 4)) {
 743                         unsigned long long mem_size;
 744
 745                         mem_size = memparse(cmdline + 4, &cmdline);
 746                         memory_end = memory_start + mem_size;
 747                 }
 748
 749                 while (*cmdline && *cmdline != ' ')
 750                         cmdline++;
 751         }
 752
 753 } /* end parse_cmdline_early() */
 754
 755 /*****************************************************************************/
 756 /*
 757  *
 758  */
 759 void __init setup_arch(char **cmdline_p)
 760 {
 761 #ifdef CONFIG_MMU
 762         printk("Linux FR-V port done by Red Hat Inc <dhowells@redhat.com>\n");
 763 #else
 764         printk("uClinux FR-V port done by Red Hat Inc <dhowells@redhat.com>\n");
 765 #endif
 766
 767         memcpy(saved_command_line, redboot_command_line, COMMAND_LINE_SIZE);
 768
 769         determine_cpu();
 770         determine_clocks(1);
 771
 772         /* For printk-directly-beats-on-serial-hardware hack */
 773         console_set_baud(115200);
 774 #ifdef CONFIG_GDBSTUB
 775         gdbstub_set_baud(115200);
 776 #endif
 777
 778 #ifdef CONFIG_RESERVE_DMA_COHERENT
 779         reserve_dma_coherent();
 780 #endif
 781         dump_memory_map();
 782
 783 #ifdef CONFIG_MB93090_MB00
 784         if (mb93090_mb00_detected)
 785                 mb93090_display();
 786 #endif
 787
 788         /* register those serial ports that are available */
 789 #ifdef CONFIG_FRV_ONCPU_SERIAL
 790 #ifndef CONFIG_GDBSTUB_UART0
 791         __reg(UART0_BASE + UART_IER * 8) = 0;
 792         early_serial_setup(&__frv_uart0);
 793 #endif
 794 #ifndef CONFIG_GDBSTUB_UART1
 795         __reg(UART1_BASE + UART_IER * 8) = 0;
 796         early_serial_setup(&__frv_uart1);
 797 #endif
 798 #endif
 799
 800 #if defined(CONFIG_CHR_DEV_FLASH) || defined(CONFIG_BLK_DEV_FLASH)
 801         /* we need to initialize the Flashrom device here since we might
 802          * do things with flash early on in the boot
 803          */
 804         flash_probe();
 805 #endif
 806
 807         /* deal with the command line - RedBoot may have passed one to the kernel */
 808         memcpy(command_line, saved_command_line, sizeof(command_line));
 809         *cmdline_p = &command_line[0];
 810         parse_cmdline_early(command_line);
 811
 812         /* set up the memory description
 813          * - by now the stack is part of the init task */
 814         printk("Memory %08lx-%08lx\n", memory_start, memory_end);
 815
 816         BUG_ON(memory_start == memory_end);
 817
 818         init_mm.start_code = (unsigned long) &_stext;
 819         init_mm.end_code = (unsigned long) &_etext;
 820         init_mm.end_data = (unsigned long) &_edata;
 821 #if 0 /* DAVIDM - don't set brk just incase someone decides to use it */
 822         init_mm.brk = (unsigned long) &_end;
 823 #else
 824         init_mm.brk = (unsigned long) 0;
 825 #endif
 826
 827 #ifdef DEBUG
 828         printk("KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x BSS=0x%06x-0x%06x\n",
 829                (int) &_stext, (int) &_etext,
 830                (int) &_sdata, (int) &_edata,
 831                (int) &_sbss, (int) &_ebss);
 832 #endif
 833
 834 #ifdef CONFIG_VT
 835 #if defined(CONFIG_VGA_CONSOLE)
 836         conswitchp = &vga_con;
 837 #elif defined(CONFIG_DUMMY_CONSOLE)
 838         conswitchp = &dummy_con;
 839 #endif
 840 #endif
 841
 842 #ifdef CONFIG_BLK_DEV_BLKMEM
 843         ROOT_DEV = MKDEV(BLKMEM_MAJOR,0);
 844 #endif
 845         /*rom_length = (unsigned long)&_flashend - (unsigned long)&_romvec;*/
 846
 847 #ifdef CONFIG_MMU
 848         setup_linux_memory();
 849 #else
 850         setup_uclinux_memory();
 851 #endif
 852
 853         /* get kmalloc into gear */
 854         paging_init();
 855
 856         /* init DMA */
 857         frv_dma_init();
 858 #ifdef DEBUG
 859         printk("Done setup_arch\n");
 860 #endif
 861
 862         /* start the decrement timer running */
 863 //      asm volatile("movgs %0,timerd" :: "r"(10000000));
 864 //      __set_HSR(0, __get_HSR(0) | HSR0_ETMD);
 865
 866 } /* end setup_arch() */
 867
 868 #if 0
 869 /*****************************************************************************/
 870 /*
 871  *
 872  */
 873 static int __devinit setup_arch_serial(void)
 874 {
 875         /* register those serial ports that are available */
 876 #ifndef CONFIG_GDBSTUB_UART0
 877         early_serial_setup(&__frv_uart0);
 878 #endif
 879 #ifndef CONFIG_GDBSTUB_UART1
 880         early_serial_setup(&__frv_uart1);
 881 #endif
 882
 883         return 0;
 884 } /* end setup_arch_serial() */
 885
 886 late_initcall(setup_arch_serial);
 887 #endif
 888
 889 /*****************************************************************************/
 890 /*
 891  * set up the memory map for normal MMU linux
 892  */
 893 #ifdef CONFIG_MMU
 894 static void __init setup_linux_memory(void)
 895 {
 896         unsigned long bootmap_size, low_top_pfn, kstart, kend, high_mem;
 897
 898         kstart  = (unsigned long) &__kernel_image_start - PAGE_OFFSET;
 899         kend    = (unsigned long) &__kernel_image_end - PAGE_OFFSET;
 900
 901         kstart = kstart & PAGE_MASK;
 902         kend = (kend + PAGE_SIZE - 1) & PAGE_MASK;
 903
 904         /* give all the memory to the bootmap allocator,  tell it to put the
 905          * boot mem_map immediately following the kernel image
 906          */
 907         bootmap_size = init_bootmem_node(NODE_DATA(0),
 908                                          kend >> PAGE_SHIFT,            /* map addr */
 909                                          memory_start >> PAGE_SHIFT,    /* start of RAM */
 910                                          memory_end >> PAGE_SHIFT       /* end of RAM */
 911                                          );
 912
 913         /* pass the memory that the kernel can immediately use over to the bootmem allocator */
 914         max_mapnr = num_physpages = (memory_end - memory_start) >> PAGE_SHIFT;
 915         low_top_pfn = (KERNEL_LOWMEM_END - KERNEL_LOWMEM_START) >> PAGE_SHIFT;
 916         high_mem = 0;
 917
 918         if (num_physpages > low_top_pfn) {
 919 #ifdef CONFIG_HIGHMEM
 920                 high_mem = num_physpages - low_top_pfn;
 921 #else
 922                 max_mapnr = num_physpages = low_top_pfn;
 923 #endif
 924         }
 925         else {
 926                 low_top_pfn = num_physpages;
 927         }
 928
 929         min_low_pfn = memory_start >> PAGE_SHIFT;
 930         max_low_pfn = low_top_pfn;
 931         max_pfn = memory_end >> PAGE_SHIFT;
 932
 933         num_mappedpages = low_top_pfn;
 934
 935         printk(KERN_NOTICE "%ldMB LOWMEM available.\n", low_top_pfn >> (20 - PAGE_SHIFT));
 936
 937         free_bootmem(memory_start, low_top_pfn << PAGE_SHIFT);
 938
 939 #ifdef CONFIG_HIGHMEM
 940         if (high_mem)
 941                 printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", high_mem >> (20 - PAGE_SHIFT));
 942 #endif
 943
 944         /* take back the memory occupied by the kernel image and the bootmem alloc map */
 945         reserve_bootmem(kstart, kend - kstart + bootmap_size);
 946
 947         /* reserve the memory occupied by the initial ramdisk */
 948 #ifdef CONFIG_BLK_DEV_INITRD
 949         if (LOADER_TYPE && INITRD_START) {
 950                 if (INITRD_START + INITRD_SIZE <= (low_top_pfn << PAGE_SHIFT)) {
 951                         reserve_bootmem(INITRD_START, INITRD_SIZE);
 952                         initrd_start = INITRD_START ? INITRD_START + PAGE_OFFSET : 0;
 953                         initrd_end = initrd_start + INITRD_SIZE;
 954                 }
 955                 else {
 956                         printk(KERN_ERR
 957                                "initrd extends beyond end of memory (0x%08lx > 0x%08lx)\n"
 958                                "disabling initrd\n",
 959                                INITRD_START + INITRD_SIZE,
 960                                low_top_pfn << PAGE_SHIFT);
 961                         initrd_start = 0;
 962                 }
 963         }
 964 #endif
 965
 966 } /* end setup_linux_memory() */
 967 #endif
 968
 969 /*****************************************************************************/
 970 /*
 971  * set up the memory map for uClinux
 972  */
 973 #ifndef CONFIG_MMU
 974 static void __init setup_uclinux_memory(void)
 975 {
 976 #ifdef CONFIG_PROTECT_KERNEL
 977         unsigned long dampr;
 978 #endif
 979         unsigned long kend;
 980         int bootmap_size;
 981
 982         kend = (unsigned long) &__kernel_image_end;
 983         kend = (kend + PAGE_SIZE - 1) & PAGE_MASK;
 984
 985         /* give all the memory to the bootmap allocator,  tell it to put the
 986          * boot mem_map immediately following the kernel image
 987          */
 988         bootmap_size = init_bootmem_node(NODE_DATA(0),
 989                                          kend >> PAGE_SHIFT,            /* map addr */
 990                                          memory_start >> PAGE_SHIFT,    /* start of RAM */
 991                                          memory_end >> PAGE_SHIFT       /* end of RAM */
 992                                          );
 993
 994         /* free all the usable memory */
 995         free_bootmem(memory_start, memory_end - memory_start);
 996
 997         high_memory = (void *) (memory_end & PAGE_MASK);
 998         max_mapnr = num_physpages = ((unsigned long) high_memory - PAGE_OFFSET) >> PAGE_SHIFT;
 999
1000         min_low_pfn = memory_start >> PAGE_SHIFT;
1001         max_low_pfn = memory_end >> PAGE_SHIFT;
1002         max_pfn = max_low_pfn;
1003
1004         /* now take back the bits the core kernel is occupying */
1005 #ifndef CONFIG_PROTECT_KERNEL
1006         reserve_bootmem(kend, bootmap_size);
1007         reserve_bootmem((unsigned long) &__kernel_image_start,
1008                         kend - (unsigned long) &__kernel_image_start);
1009
1010 #else
1011         dampr = __get_DAMPR(0);
1012         dampr &= xAMPRx_SS;
1013         dampr = (dampr >> 4) + 17;
1014         dampr = 1 << dampr;
1015
1016         reserve_bootmem(__get_DAMPR(0) & xAMPRx_PPFN, dampr);
1017 #endif
1018
1019         /* reserve some memory to do uncached DMA through if requested */
1020 #ifdef CONFIG_RESERVE_DMA_COHERENT
1021         if (dma_coherent_mem_start)
1022                 reserve_bootmem(dma_coherent_mem_start,
1023                                 dma_coherent_mem_end - dma_coherent_mem_start);
1024 #endif
1025
1026 } /* end setup_uclinux_memory() */
1027 #endif
1028
1029 /*****************************************************************************/
1030 /*
1031  * get CPU information for use by procfs
1032  */
1033 static int show_cpuinfo(struct seq_file *m, void *v)
1034 {
1035         const char *gr, *fr, *fm, *fp, *cm, *nem, *ble;
1036 #ifdef CONFIG_PM
1037         const char *sep;
1038 #endif
1039
1040         gr  = cpu_hsr0_all & HSR0_GRHE  ? "gr0-63"      : "gr0-31";
1041         fr  = cpu_hsr0_all & HSR0_FRHE  ? "fr0-63"      : "fr0-31";
1042         fm  = cpu_psr_all  & PSR_EM     ? ", Media"     : "";
1043         fp  = cpu_psr_all  & PSR_EF     ? ", FPU"       : "";
1044         cm  = cpu_psr_all  & PSR_CM     ? ", CCCR"      : "";
1045         nem = cpu_psr_all  & PSR_NEM    ? ", NE"        : "";
1046         ble = cpu_psr_all  & PSR_BE     ? "BE"          : "LE";
1047
1048         seq_printf(m,
1049                    "CPU-Series:\t%s\n"
1050                    "CPU-Core:\t%s, %s, %s%s%s\n"
1051                    "CPU:\t\t%s\n"
1052                    "MMU:\t\t%s\n"
1053                    "FP-Media:\t%s%s%s\n"
1054                    "System:\t\t%s",
1055                    cpu_series,
1056                    cpu_core, gr, ble, cm, nem,
1057                    cpu_silicon,
1058                    cpu_mmu,
1059                    fr, fm, fp,
1060                    cpu_system);
1061
1062         if (cpu_board1)
1063                 seq_printf(m, ", %s", cpu_board1);
1064
1065         if (cpu_board2)
1066                 seq_printf(m, ", %s", cpu_board2);
1067
1068         seq_printf(m, "\n");
1069
1070 #ifdef CONFIG_PM
1071         seq_printf(m, "PM-Controls:");
1072         sep = "\t";
1073
1074         if (clock_bits_settable & CLOCK_BIT_CMODE) {
1075                 seq_printf(m, "%scmode=0x%04hx", sep, clock_cmodes_permitted);
1076                 sep = ", ";
1077         }
1078
1079         if (clock_bits_settable & CLOCK_BIT_CM) {
1080                 seq_printf(m, "%scm=0x%lx", sep, clock_bits_settable & CLOCK_BIT_CM);
1081                 sep = ", ";
1082         }
1083
1084         if (clock_bits_settable & CLOCK_BIT_P0) {
1085                 seq_printf(m, "%sp0=0x3", sep);
1086                 sep = ", ";
1087         }
1088
1089         seq_printf(m, "%ssuspend=0x22\n", sep);
1090 #endif
1091
1092         seq_printf(m,
1093                    "PM-Status:\tcmode=%d, cm=%d, p0=%d\n",
1094                    clock_cmode_current, clock_cm_current, clock_p0_current);
1095
1096 #define print_clk(TAG, VAR) \
1097         seq_printf(m, "Clock-" TAG ":\t%lu.%2.2lu MHz\n", VAR / 1000000, (VAR / 10000) % 100)
1098
1099         print_clk("In",    __clkin_clock_speed_HZ);
1100         print_clk("Core",  __core_clock_speed_HZ);
1101         print_clk("SDRAM", __sdram_clock_speed_HZ);
1102         print_clk("CBus",  __core_bus_clock_speed_HZ);
1103         print_clk("Res",   __res_bus_clock_speed_HZ);
1104         print_clk("Ext",   __ext_bus_clock_speed_HZ);
1105         print_clk("DSU",   __dsu_clock_speed_HZ);
1106
1107         seq_printf(m,
1108                    "BogoMips:\t%lu.%02lu\n",
1109                    (loops_per_jiffy * HZ) / 500000, ((loops_per_jiffy * HZ) / 5000) % 100);
1110
1111         return 0;
1112 } /* end show_cpuinfo() */
1113
1114 static void *c_start(struct seq_file *m, loff_t *pos)
1115 {
1116         return *pos < NR_CPUS ? (void *) 0x12345678 : NULL;
1117 }
1118
1119 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1120 {
1121         ++*pos;
1122         return c_start(m, pos);
1123 }
1124
1125 static void c_stop(struct seq_file *m, void *v)
1126 {
1127 }
1128
1129 struct seq_operations cpuinfo_op = {
1130         .start  = c_start,
1131         .next   = c_next,
1132         .stop   = c_stop,
1133         .show   = show_cpuinfo,
1134 };
1135
1136 void arch_gettod(int *year, int *mon, int *day, int *hour,
1137                  int *min, int *sec)
1138 {
1139         *year = *mon = *day = *hour = *min = *sec = 0;
1140 }
1141
1142 /*****************************************************************************/
1143 /*
1144  *
1145  */
1146 #ifdef CONFIG_MB93090_MB00
1147 static void __init mb93090_sendlcdcmd(uint32_t cmd)
1148 {
1149         unsigned long base = __addr_LCD();
1150         int loop;
1151
1152         /* request reading of the busy flag */
1153         __set_LCD(base, LCD_CMD_READ_BUSY);
1154         __set_LCD(base, LCD_CMD_READ_BUSY & ~LCD_E);
1155
1156         /* wait for the busy flag to become clear */
1157         for (loop = 10000; loop > 0; loop--)
1158                 if (!(__get_LCD(base) & 0x80))
1159                         break;
1160
1161         /* send the command */
1162         __set_LCD(base, cmd);
1163         __set_LCD(base, cmd & ~LCD_E);
1164
1165 } /* end mb93090_sendlcdcmd() */
1166
1167 /*****************************************************************************/
1168 /*
1169  * write to the MB93090 LEDs and LCD
1170  */
1171 static void __init mb93090_display(void)
1172 {
1173         const char *p;
1174
1175         __set_LEDS(0);
1176
1177         /* set up the LCD */
1178         mb93090_sendlcdcmd(LCD_CMD_CLEAR);
1179         mb93090_sendlcdcmd(LCD_CMD_FUNCSET(1,1,0));
1180         mb93090_sendlcdcmd(LCD_CMD_ON(0,0));
1181         mb93090_sendlcdcmd(LCD_CMD_HOME);
1182
1183         mb93090_sendlcdcmd(LCD_CMD_SET_DD_ADDR(0));
1184         for (p = mb93090_banner; *p; p++)
1185                 mb93090_sendlcdcmd(LCD_DATA_WRITE(*p));
1186
1187         mb93090_sendlcdcmd(LCD_CMD_SET_DD_ADDR(64));
1188         for (p = mb93090_version; *p; p++)
1189                 mb93090_sendlcdcmd(LCD_DATA_WRITE(*p));
1190
1191 } /* end mb93090_display() */
1192
1193 #endif // CONFIG_MB93090_MB00