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 <generated/utsrelease.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 #include <linux/serial_8250.h>
  33
  34 #include <asm/setup.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/io.h>
  47
  48 #ifdef CONFIG_BLK_DEV_INITRD
  49 #include <asm/pgtable.h>
  50 #endif
  51
  52 #include "local.h"
  53
  54 #ifdef CONFIG_MB93090_MB00
  55 static void __init mb93090_display(void);
  56 #endif
  57 #ifdef CONFIG_MMU
  58 static void __init setup_linux_memory(void);
  59 #else
  60 static void __init setup_uclinux_memory(void);
  61 #endif
  62
  63 #ifdef CONFIG_MB93090_MB00
  64 static char __initdata mb93090_banner[] = "FJ/RH FR-V Linux";
  65 static char __initdata mb93090_version[] = UTS_RELEASE;
  66
  67 int __nongprelbss mb93090_mb00_detected;
  68 #endif
  69
  70 const char __frv_unknown_system[] = "unknown";
  71 const char __frv_mb93091_cb10[] = "mb93091-cb10";
  72 const char __frv_mb93091_cb11[] = "mb93091-cb11";
  73 const char __frv_mb93091_cb30[] = "mb93091-cb30";
  74 const char __frv_mb93091_cb41[] = "mb93091-cb41";
  75 const char __frv_mb93091_cb60[] = "mb93091-cb60";
  76 const char __frv_mb93091_cb70[] = "mb93091-cb70";
  77 const char __frv_mb93091_cb451[] = "mb93091-cb451";
  78 const char __frv_mb93090_mb00[] = "mb93090-mb00";
  79
  80 const char __frv_mb93493[] = "mb93493";
  81
  82 const char __frv_mb93093[] = "mb93093";
  83
  84 static const char *__nongprelbss cpu_series;
  85 static const char *__nongprelbss cpu_core;
  86 static const char *__nongprelbss cpu_silicon;
  87 static const char *__nongprelbss cpu_mmu;
  88 static const char *__nongprelbss cpu_system;
  89 static const char *__nongprelbss cpu_board1;
  90 static const char *__nongprelbss cpu_board2;
  91
  92 static unsigned long __nongprelbss cpu_psr_all;
  93 static unsigned long __nongprelbss cpu_hsr0_all;
  94
  95 unsigned long __nongprelbss pdm_suspend_mode;
  96
  97 unsigned long __nongprelbss rom_length;
  98 unsigned long __nongprelbss memory_start;
  99 unsigned long __nongprelbss memory_end;
 100
 101 unsigned long __nongprelbss dma_coherent_mem_start;
 102 unsigned long __nongprelbss dma_coherent_mem_end;
 103
 104 unsigned long __initdata __sdram_old_base;
 105 unsigned long __initdata num_mappedpages;
 106
 107 struct cpuinfo_frv __nongprelbss boot_cpu_data;
 108
 109 char __initdata command_line[COMMAND_LINE_SIZE];
 110 char __initdata redboot_command_line[COMMAND_LINE_SIZE];
 111
 112 #ifdef CONFIG_PM
 113 #define __pminit
 114 #define __pminitdata
 115 #else
 116 #define __pminit __init
 117 #define __pminitdata __initdata
 118 #endif
 119
 120 struct clock_cmode {
 121         uint8_t xbus, sdram, corebus, core, dsu;
 122 };
 123
 124 #define _frac(N,D) ((N)<<4 | (D))
 125 #define _x0_16  _frac(1,6)
 126 #define _x0_25  _frac(1,4)
 127 #define _x0_33  _frac(1,3)
 128 #define _x0_375 _frac(3,8)
 129 #define _x0_5   _frac(1,2)
 130 #define _x0_66  _frac(2,3)
 131 #define _x0_75  _frac(3,4)
 132 #define _x1     _frac(1,1)
 133 #define _x1_5   _frac(3,2)
 134 #define _x2     _frac(2,1)
 135 #define _x3     _frac(3,1)
 136 #define _x4     _frac(4,1)
 137 #define _x4_5   _frac(9,2)
 138 #define _x6     _frac(6,1)
 139 #define _x8     _frac(8,1)
 140 #define _x9     _frac(9,1)
 141
 142 int __nongprelbss clock_p0_current;
 143 int __nongprelbss clock_cm_current;
 144 int __nongprelbss clock_cmode_current;
 145 #ifdef CONFIG_PM
 146 int __nongprelbss clock_cmodes_permitted;
 147 unsigned long __nongprelbss clock_bits_settable;
 148 #endif
 149
 150 static struct clock_cmode __pminitdata undef_clock_cmode = { _x1, _x1, _x1, _x1, _x1 };
 151
 152 static struct clock_cmode __pminitdata clock_cmodes_fr401_fr403[16] = {
 153         [4]     = {     _x1,    _x1,    _x2,    _x2,    _x0_25  },
 154         [5]     = {     _x1,    _x2,    _x4,    _x4,    _x0_5   },
 155         [8]     = {     _x1,    _x1,    _x1,    _x2,    _x0_25  },
 156         [9]     = {     _x1,    _x2,    _x2,    _x4,    _x0_5   },
 157         [11]    = {     _x1,    _x4,    _x4,    _x8,    _x1     },
 158         [12]    = {     _x1,    _x1,    _x2,    _x4,    _x0_5   },
 159         [13]    = {     _x1,    _x2,    _x4,    _x8,    _x1     },
 160 };
 161
 162 static struct clock_cmode __pminitdata clock_cmodes_fr405[16] = {
 163         [0]     = {     _x1,    _x1,    _x1,    _x1,    _x0_5   },
 164         [1]     = {     _x1,    _x1,    _x1,    _x3,    _x0_25  },
 165         [2]     = {     _x1,    _x1,    _x2,    _x6,    _x0_5   },
 166         [3]     = {     _x1,    _x2,    _x2,    _x6,    _x0_5   },
 167         [4]     = {     _x1,    _x1,    _x2,    _x2,    _x0_16  },
 168         [8]     = {     _x1,    _x1,    _x1,    _x2,    _x0_16  },
 169         [9]     = {     _x1,    _x2,    _x2,    _x4,    _x0_33  },
 170         [12]    = {     _x1,    _x1,    _x2,    _x4,    _x0_33  },
 171         [14]    = {     _x1,    _x3,    _x3,    _x9,    _x0_75  },
 172         [15]    = {     _x1,    _x1_5,  _x1_5,  _x4_5,  _x0_375 },
 173
 174 #define CLOCK_CMODES_PERMITTED_FR405 0xd31f
 175 };
 176
 177 static struct clock_cmode __pminitdata clock_cmodes_fr555[16] = {
 178         [0]     = {     _x1,    _x2,    _x2,    _x4,    _x0_33  },
 179         [1]     = {     _x1,    _x3,    _x3,    _x6,    _x0_5   },
 180         [2]     = {     _x1,    _x2,    _x4,    _x8,    _x0_66  },
 181         [3]     = {     _x1,    _x1_5,  _x3,    _x6,    _x0_5   },
 182         [4]     = {     _x1,    _x3,    _x3,    _x9,    _x0_75  },
 183         [5]     = {     _x1,    _x2,    _x2,    _x6,    _x0_5   },
 184         [6]     = {     _x1,    _x1_5,  _x1_5,  _x4_5,  _x0_375 },
 185 };
 186
 187 static const struct clock_cmode __pminitdata *clock_cmodes;
 188 static int __pminitdata clock_doubled;
 189
 190 static struct uart_port __pminitdata __frv_uart0 = {
 191         .uartclk                = 0,
 192         .membase                = (char *) UART0_BASE,
 193         .irq                    = IRQ_CPU_UART0,
 194         .regshift               = 3,
 195         .iotype                 = UPIO_MEM,
 196         .flags                  = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 197 };
 198
 199 static struct uart_port __pminitdata __frv_uart1 = {
 200         .uartclk                = 0,
 201         .membase                = (char *) UART1_BASE,
 202         .irq                    = IRQ_CPU_UART1,
 203         .regshift               = 3,
 204         .iotype                 = UPIO_MEM,
 205         .flags                  = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 206 };
 207
 208 #if 0
 209 static void __init printk_xampr(unsigned long ampr, unsigned long amlr, char i_d, int n)
 210 {
 211         unsigned long phys, virt, cxn, size;
 212
 213 #ifdef CONFIG_MMU
 214         virt = amlr & 0xffffc000;
 215         cxn = amlr & 0x3fff;
 216 #else
 217         virt = ampr & 0xffffc000;
 218         cxn = 0;
 219 #endif
 220         phys = ampr & xAMPRx_PPFN;
 221         size = 1 << (((ampr & xAMPRx_SS) >> 4) + 17);
 222
 223         printk("%cAMPR%d: va %08lx-%08lx [pa %08lx] %c%c%c%c [cxn:%04lx]\n",
 224                i_d, n,
 225                virt, virt + size - 1,
 226                phys,
 227                ampr & xAMPRx_S  ? 'S' : '-',
 228                ampr & xAMPRx_C  ? 'C' : '-',
 229                ampr & DAMPRx_WP ? 'W' : '-',
 230                ampr & xAMPRx_V  ? 'V' : '-',
 231                cxn
 232                );
 233 }
 234 #endif
 235
 236 /*****************************************************************************/
 237 /*
 238  * dump the memory map
 239  */
 240 static void __init dump_memory_map(void)
 241 {
 242
 243 #if 0
 244         /* dump the protection map */
 245         printk_xampr(__get_IAMPR(0),  __get_IAMLR(0),  'I', 0);
 246         printk_xampr(__get_IAMPR(1),  __get_IAMLR(1),  'I', 1);
 247         printk_xampr(__get_IAMPR(2),  __get_IAMLR(2),  'I', 2);
 248         printk_xampr(__get_IAMPR(3),  __get_IAMLR(3),  'I', 3);
 249         printk_xampr(__get_IAMPR(4),  __get_IAMLR(4),  'I', 4);
 250         printk_xampr(__get_IAMPR(5),  __get_IAMLR(5),  'I', 5);
 251         printk_xampr(__get_IAMPR(6),  __get_IAMLR(6),  'I', 6);
 252         printk_xampr(__get_IAMPR(7),  __get_IAMLR(7),  'I', 7);
 253         printk_xampr(__get_IAMPR(8),  __get_IAMLR(8),  'I', 8);
 254         printk_xampr(__get_IAMPR(9),  __get_IAMLR(9),  'i', 9);
 255         printk_xampr(__get_IAMPR(10), __get_IAMLR(10), 'I', 10);
 256         printk_xampr(__get_IAMPR(11), __get_IAMLR(11), 'I', 11);
 257         printk_xampr(__get_IAMPR(12), __get_IAMLR(12), 'I', 12);
 258         printk_xampr(__get_IAMPR(13), __get_IAMLR(13), 'I', 13);
 259         printk_xampr(__get_IAMPR(14), __get_IAMLR(14), 'I', 14);
 260         printk_xampr(__get_IAMPR(15), __get_IAMLR(15), 'I', 15);
 261
 262         printk_xampr(__get_DAMPR(0),  __get_DAMLR(0),  'D', 0);
 263         printk_xampr(__get_DAMPR(1),  __get_DAMLR(1),  'D', 1);
 264         printk_xampr(__get_DAMPR(2),  __get_DAMLR(2),  'D', 2);
 265         printk_xampr(__get_DAMPR(3),  __get_DAMLR(3),  'D', 3);
 266         printk_xampr(__get_DAMPR(4),  __get_DAMLR(4),  'D', 4);
 267         printk_xampr(__get_DAMPR(5),  __get_DAMLR(5),  'D', 5);
 268         printk_xampr(__get_DAMPR(6),  __get_DAMLR(6),  'D', 6);
 269         printk_xampr(__get_DAMPR(7),  __get_DAMLR(7),  'D', 7);
 270         printk_xampr(__get_DAMPR(8),  __get_DAMLR(8),  'D', 8);
 271         printk_xampr(__get_DAMPR(9),  __get_DAMLR(9),  'D', 9);
 272         printk_xampr(__get_DAMPR(10), __get_DAMLR(10), 'D', 10);
 273         printk_xampr(__get_DAMPR(11), __get_DAMLR(11), 'D', 11);
 274         printk_xampr(__get_DAMPR(12), __get_DAMLR(12), 'D', 12);
 275         printk_xampr(__get_DAMPR(13), __get_DAMLR(13), 'D', 13);
 276         printk_xampr(__get_DAMPR(14), __get_DAMLR(14), 'D', 14);
 277         printk_xampr(__get_DAMPR(15), __get_DAMLR(15), 'D', 15);
 278 #endif
 279
 280 #if 0
 281         /* dump the bus controller registers */
 282         printk("LGCR: %08lx\n", __get_LGCR());
 283         printk("Master: %08lx-%08lx CR=%08lx\n",
 284                __get_LEMBR(), __get_LEMBR() + __get_LEMAM(),
 285                __get_LMAICR());
 286
 287         int loop;
 288         for (loop = 1; loop <= 7; loop++) {
 289                 unsigned long lcr = __get_LCR(loop), lsbr = __get_LSBR(loop);
 290                 printk("CS#%d: %08lx-%08lx %c%c%c%c%c%c%c%c%c\n",
 291                        loop,
 292                        lsbr, lsbr + __get_LSAM(loop),
 293                        lcr & 0x80000000 ? 'r' : '-',
 294                        lcr & 0x40000000 ? 'w' : '-',
 295                        lcr & 0x08000000 ? 'b' : '-',
 296                        lcr & 0x04000000 ? 'B' : '-',
 297                        lcr & 0x02000000 ? 'C' : '-',
 298                        lcr & 0x01000000 ? 'D' : '-',
 299                        lcr & 0x00800000 ? 'W' : '-',
 300                        lcr & 0x00400000 ? 'R' : '-',
 301                        (lcr & 0x00030000) == 0x00000000 ? '4' :
 302                        (lcr & 0x00030000) == 0x00010000 ? '2' :
 303                        (lcr & 0x00030000) == 0x00020000 ? '1' :
 304                        '-'
 305                        );
 306         }
 307 #endif
 308
 309 #if 0
 310         printk("\n");
 311 #endif
 312 } /* end dump_memory_map() */
 313
 314 /*****************************************************************************/
 315 /*
 316  * attempt to detect a VDK motherboard and DAV daughter board on an MB93091 system
 317  */
 318 #ifdef CONFIG_MB93091_VDK
 319 static void __init detect_mb93091(void)
 320 {
 321 #ifdef CONFIG_MB93090_MB00
 322         /* Detect CB70 without motherboard */
 323         if (!(cpu_system == __frv_mb93091_cb70 && ((*(unsigned short *)0xffc00030) & 0x100))) {
 324                 cpu_board1 = __frv_mb93090_mb00;
 325                 mb93090_mb00_detected = 1;
 326         }
 327 #endif
 328
 329 #ifdef CONFIG_FUJITSU_MB93493
 330         cpu_board2 = __frv_mb93493;
 331 #endif
 332
 333 } /* end detect_mb93091() */
 334 #endif
 335
 336 /*****************************************************************************/
 337 /*
 338  * determine the CPU type and set appropriate parameters
 339  *
 340  * Family     Series      CPU Core    Silicon    Imple  Vers
 341  * ----------------------------------------------------------
 342  * FR-V --+-> FR400 --+-> FR401 --+-> MB93401     02     00 [1]
 343  *        |           |           |
 344  *        |           |           +-> MB93401/A   02     01
 345  *        |           |           |
 346  *        |           |           +-> MB93403     02     02
 347  *        |           |
 348  *        |           +-> FR405 ----> MB93405     04     00
 349  *        |
 350  *        +-> FR450 ----> FR451 ----> MB93451     05     00
 351  *        |
 352  *        +-> FR500 ----> FR501 --+-> MB93501     01     01 [2]
 353  *        |                       |
 354  *        |                       +-> MB93501/A   01     02
 355  *        |
 356  *        +-> FR550 --+-> FR551 ----> MB93555     03     01
 357  *
 358  *  [1] The MB93401 is an obsolete CPU replaced by the MB93401A
 359  *  [2] The MB93501 is an obsolete CPU replaced by the MB93501A
 360  *
 361  * Imple is PSR(Processor Status Register)[31:28].
 362  * Vers is PSR(Processor Status Register)[27:24].
 363  *
 364  * A "Silicon" consists of CPU core and some on-chip peripherals.
 365  */
 366 static void __init determine_cpu(void)
 367 {
 368         unsigned long hsr0 = __get_HSR(0);
 369         unsigned long psr = __get_PSR();
 370
 371         /* work out what selectable services the CPU supports */
 372         __set_PSR(psr | PSR_EM | PSR_EF | PSR_CM | PSR_NEM);
 373         cpu_psr_all = __get_PSR();
 374         __set_PSR(psr);
 375
 376         __set_HSR(0, hsr0 | HSR0_GRLE | HSR0_GRHE | HSR0_FRLE | HSR0_FRHE);
 377         cpu_hsr0_all = __get_HSR(0);
 378         __set_HSR(0, hsr0);
 379
 380         /* derive other service specs from the CPU type */
 381         cpu_series              = "unknown";
 382         cpu_core                = "unknown";
 383         cpu_silicon             = "unknown";
 384         cpu_mmu                 = "Prot";
 385         cpu_system              = __frv_unknown_system;
 386         clock_cmodes            = NULL;
 387         clock_doubled           = 0;
 388 #ifdef CONFIG_PM
 389         clock_bits_settable     = CLOCK_BIT_CM_H | CLOCK_BIT_CM_M | CLOCK_BIT_P0;
 390 #endif
 391
 392         switch (PSR_IMPLE(psr)) {
 393         case PSR_IMPLE_FR401:
 394                 cpu_series      = "fr400";
 395                 cpu_core        = "fr401";
 396                 pdm_suspend_mode = HSR0_PDM_PLL_RUN;
 397
 398                 switch (PSR_VERSION(psr)) {
 399                 case PSR_VERSION_FR401_MB93401:
 400                         cpu_silicon     = "mb93401";
 401                         cpu_system      = __frv_mb93091_cb10;
 402                         clock_cmodes    = clock_cmodes_fr401_fr403;
 403                         clock_doubled   = 1;
 404                         break;
 405                 case PSR_VERSION_FR401_MB93401A:
 406                         cpu_silicon     = "mb93401/A";
 407                         cpu_system      = __frv_mb93091_cb11;
 408                         clock_cmodes    = clock_cmodes_fr401_fr403;
 409                         break;
 410                 case PSR_VERSION_FR401_MB93403:
 411                         cpu_silicon     = "mb93403";
 412 #ifndef CONFIG_MB93093_PDK
 413                         cpu_system      = __frv_mb93091_cb30;
 414 #else
 415                         cpu_system      = __frv_mb93093;
 416 #endif
 417                         clock_cmodes    = clock_cmodes_fr401_fr403;
 418                         break;
 419                 default:
 420                         break;
 421                 }
 422                 break;
 423
 424         case PSR_IMPLE_FR405:
 425                 cpu_series      = "fr400";
 426                 cpu_core        = "fr405";
 427                 pdm_suspend_mode = HSR0_PDM_PLL_STOP;
 428
 429                 switch (PSR_VERSION(psr)) {
 430                 case PSR_VERSION_FR405_MB93405:
 431                         cpu_silicon     = "mb93405";
 432                         cpu_system      = __frv_mb93091_cb60;
 433                         clock_cmodes    = clock_cmodes_fr405;
 434 #ifdef CONFIG_PM
 435                         clock_bits_settable |= CLOCK_BIT_CMODE;
 436                         clock_cmodes_permitted = CLOCK_CMODES_PERMITTED_FR405;
 437 #endif
 438
 439                         /* the FPGA on the CB70 has extra registers
 440                          * - it has 0x0046 in the VDK_ID FPGA register at 0x1a0, which is
 441                          *   how we tell the difference between it and a CB60
 442                          */
 443                         if (*(volatile unsigned short *) 0xffc001a0 == 0x0046)
 444                                 cpu_system = __frv_mb93091_cb70;
 445                         break;
 446                 default:
 447                         break;
 448                 }
 449                 break;
 450
 451         case PSR_IMPLE_FR451:
 452                 cpu_series      = "fr450";
 453                 cpu_core        = "fr451";
 454                 pdm_suspend_mode = HSR0_PDM_PLL_STOP;
 455 #ifdef CONFIG_PM
 456                 clock_bits_settable |= CLOCK_BIT_CMODE;
 457                 clock_cmodes_permitted = CLOCK_CMODES_PERMITTED_FR405;
 458 #endif
 459                 switch (PSR_VERSION(psr)) {
 460                 case PSR_VERSION_FR451_MB93451:
 461                         cpu_silicon     = "mb93451";
 462                         cpu_mmu         = "Prot, SAT, xSAT, DAT";
 463                         cpu_system      = __frv_mb93091_cb451;
 464                         clock_cmodes    = clock_cmodes_fr405;
 465                         break;
 466                 default:
 467                         break;
 468                 }
 469                 break;
 470
 471         case PSR_IMPLE_FR501:
 472                 cpu_series      = "fr500";
 473                 cpu_core        = "fr501";
 474                 pdm_suspend_mode = HSR0_PDM_PLL_STOP;
 475
 476                 switch (PSR_VERSION(psr)) {
 477                 case PSR_VERSION_FR501_MB93501:  cpu_silicon = "mb93501";   break;
 478                 case PSR_VERSION_FR501_MB93501A: cpu_silicon = "mb93501/A"; break;
 479                 default:
 480                         break;
 481                 }
 482                 break;
 483
 484         case PSR_IMPLE_FR551:
 485                 cpu_series      = "fr550";
 486                 cpu_core        = "fr551";
 487                 pdm_suspend_mode = HSR0_PDM_PLL_RUN;
 488
 489                 switch (PSR_VERSION(psr)) {
 490                 case PSR_VERSION_FR551_MB93555:
 491                         cpu_silicon     = "mb93555";
 492                         cpu_mmu         = "Prot, SAT";
 493                         cpu_system      = __frv_mb93091_cb41;
 494                         clock_cmodes    = clock_cmodes_fr555;
 495                         clock_doubled   = 1;
 496                         break;
 497                 default:
 498                         break;
 499                 }
 500                 break;
 501
 502         default:
 503                 break;
 504         }
 505
 506         printk("- Series:%s CPU:%s Silicon:%s\n",
 507                cpu_series, cpu_core, cpu_silicon);
 508
 509 #ifdef CONFIG_MB93091_VDK
 510         detect_mb93091();
 511 #endif
 512
 513 #if defined(CONFIG_MB93093_PDK) && defined(CONFIG_FUJITSU_MB93493)
 514         cpu_board2 = __frv_mb93493;
 515 #endif
 516
 517 } /* end determine_cpu() */
 518
 519 /*****************************************************************************/
 520 /*
 521  * calculate the bus clock speed
 522  */
 523 void __pminit determine_clocks(int verbose)
 524 {
 525         const struct clock_cmode *mode, *tmode;
 526         unsigned long clkc, psr, quot;
 527
 528         clkc = __get_CLKC();
 529         psr = __get_PSR();
 530
 531         clock_p0_current = !!(clkc & CLKC_P0);
 532         clock_cm_current = clkc & CLKC_CM;
 533         clock_cmode_current = (clkc & CLKC_CMODE) >> CLKC_CMODE_s;
 534
 535         if (verbose)
 536                 printk("psr=%08lx hsr0=%08lx clkc=%08lx\n", psr, __get_HSR(0), clkc);
 537
 538         /* the CB70 has some alternative ways of setting the clock speed through switches accessed
 539          * through the FPGA.  */
 540         if (cpu_system == __frv_mb93091_cb70) {
 541                 unsigned short clkswr = *(volatile unsigned short *) 0xffc00104UL & 0x1fffUL;
 542
 543                 if (clkswr & 0x1000)
 544                         __clkin_clock_speed_HZ = 60000000UL;
 545                 else
 546                         __clkin_clock_speed_HZ =
 547                                 ((clkswr >> 8) & 0xf) * 10000000 +
 548                                 ((clkswr >> 4) & 0xf) * 1000000 +
 549                                 ((clkswr     ) & 0xf) * 100000;
 550         }
 551         /* the FR451 is currently fixed at 24MHz */
 552         else if (cpu_system == __frv_mb93091_cb451) {
 553                 //__clkin_clock_speed_HZ = 24000000UL; // CB451-FPGA
 554                 unsigned short clkswr = *(volatile unsigned short *) 0xffc00104UL & 0x1fffUL;
 555
 556                 if (clkswr & 0x1000)
 557                         __clkin_clock_speed_HZ = 60000000UL;
 558                 else
 559                         __clkin_clock_speed_HZ =
 560                                 ((clkswr >> 8) & 0xf) * 10000000 +
 561                                 ((clkswr >> 4) & 0xf) * 1000000 +
 562                                 ((clkswr     ) & 0xf) * 100000;
 563         }
 564         /* otherwise determine the clockspeed from VDK or other registers */
 565         else {
 566                 __clkin_clock_speed_HZ = __get_CLKIN();
 567         }
 568
 569         /* look up the appropriate clock relationships table entry */
 570         mode = &undef_clock_cmode;
 571         if (clock_cmodes) {
 572                 tmode = &clock_cmodes[(clkc & CLKC_CMODE) >> CLKC_CMODE_s];
 573                 if (tmode->xbus)
 574                         mode = tmode;
 575         }
 576
 577 #define CLOCK(SRC,RATIO) ((SRC) * (((RATIO) >> 4) & 0x0f) / ((RATIO) & 0x0f))
 578
 579         if (clock_doubled)
 580                 __clkin_clock_speed_HZ <<= 1;
 581
 582         __ext_bus_clock_speed_HZ        = CLOCK(__clkin_clock_speed_HZ, mode->xbus);
 583         __sdram_clock_speed_HZ          = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
 584         __dsu_clock_speed_HZ            = CLOCK(__clkin_clock_speed_HZ, mode->dsu);
 585
 586         switch (clkc & CLKC_CM) {
 587         case 0: /* High */
 588                 __core_bus_clock_speed_HZ       = CLOCK(__clkin_clock_speed_HZ, mode->corebus);
 589                 __core_clock_speed_HZ           = CLOCK(__clkin_clock_speed_HZ, mode->core);
 590                 break;
 591         case 1: /* Medium */
 592                 __core_bus_clock_speed_HZ       = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
 593                 __core_clock_speed_HZ           = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
 594                 break;
 595         case 2: /* Low; not supported */
 596         case 3: /* UNDEF */
 597                 printk("Unsupported CLKC CM %ld\n", clkc & CLKC_CM);
 598                 panic("Bye");
 599         }
 600
 601         __res_bus_clock_speed_HZ = __ext_bus_clock_speed_HZ;
 602         if (clkc & CLKC_P0)
 603                 __res_bus_clock_speed_HZ >>= 1;
 604
 605         if (verbose) {
 606                 printk("CLKIN: %lu.%3.3luMHz\n",
 607                        __clkin_clock_speed_HZ / 1000000,
 608                        (__clkin_clock_speed_HZ / 1000) % 1000);
 609
 610                 printk("CLKS:"
 611                        " ext=%luMHz res=%luMHz sdram=%luMHz cbus=%luMHz core=%luMHz dsu=%luMHz\n",
 612                        __ext_bus_clock_speed_HZ / 1000000,
 613                        __res_bus_clock_speed_HZ / 1000000,
 614                        __sdram_clock_speed_HZ / 1000000,
 615                        __core_bus_clock_speed_HZ / 1000000,
 616                        __core_clock_speed_HZ / 1000000,
 617                        __dsu_clock_speed_HZ / 1000000
 618                        );
 619         }
 620
 621         /* calculate the number of __delay() loop iterations per sec (2 insn loop) */
 622         __delay_loops_MHz = __core_clock_speed_HZ / (1000000 * 2);
 623
 624         /* set the serial prescaler */
 625         __serial_clock_speed_HZ = __res_bus_clock_speed_HZ;
 626         quot = 1;
 627         while (__serial_clock_speed_HZ / quot / 16 / 65536 > 3000)
 628                 quot += 1;
 629
 630         /* double the divisor if P0 is clear, so that if/when P0 is set, it's still achievable
 631          * - we have to be careful - dividing too much can mean we can't get 115200 baud
 632          */
 633         if (__serial_clock_speed_HZ > 32000000 && !(clkc & CLKC_P0))
 634                 quot <<= 1;
 635
 636         __serial_clock_speed_HZ /= quot;
 637         __frv_uart0.uartclk = __serial_clock_speed_HZ;
 638         __frv_uart1.uartclk = __serial_clock_speed_HZ;
 639
 640         if (verbose)
 641                 printk("      uart=%luMHz\n", __serial_clock_speed_HZ / 1000000 * quot);
 642
 643         while (!(__get_UART0_LSR() & UART_LSR_TEMT))
 644                 continue;
 645
 646         while (!(__get_UART1_LSR() & UART_LSR_TEMT))
 647                 continue;
 648
 649         __set_UCPVR(quot);
 650         __set_UCPSR(0);
 651 } /* end determine_clocks() */
 652
 653 /*****************************************************************************/
 654 /*
 655  * reserve some DMA consistent memory
 656  */
 657 #ifdef CONFIG_RESERVE_DMA_COHERENT
 658 static void __init reserve_dma_coherent(void)
 659 {
 660         unsigned long ampr;
 661
 662         /* find the first non-kernel memory tile and steal it */
 663 #define __steal_AMPR(r)                                         \
 664         if (__get_DAMPR(r) & xAMPRx_V) {                        \
 665                 ampr = __get_DAMPR(r);                          \
 666                 __set_DAMPR(r, ampr | xAMPRx_S | xAMPRx_C);     \
 667                 __set_IAMPR(r, 0);                              \
 668                 goto found;                                     \
 669         }
 670
 671         __steal_AMPR(1);
 672         __steal_AMPR(2);
 673         __steal_AMPR(3);
 674         __steal_AMPR(4);
 675         __steal_AMPR(5);
 676         __steal_AMPR(6);
 677
 678         if (PSR_IMPLE(__get_PSR()) == PSR_IMPLE_FR551) {
 679                 __steal_AMPR(7);
 680                 __steal_AMPR(8);
 681                 __steal_AMPR(9);
 682                 __steal_AMPR(10);
 683                 __steal_AMPR(11);
 684                 __steal_AMPR(12);
 685                 __steal_AMPR(13);
 686                 __steal_AMPR(14);
 687         }
 688
 689         /* unable to grant any DMA consistent memory */
 690         printk("No DMA consistent memory reserved\n");
 691         return;
 692
 693  found:
 694         dma_coherent_mem_start = ampr & xAMPRx_PPFN;
 695         ampr &= xAMPRx_SS;
 696         ampr >>= 4;
 697         ampr = 1 << (ampr - 3 + 20);
 698         dma_coherent_mem_end = dma_coherent_mem_start + ampr;
 699
 700         printk("DMA consistent memory reserved %lx-%lx\n",
 701                dma_coherent_mem_start, dma_coherent_mem_end);
 702
 703 } /* end reserve_dma_coherent() */
 704 #endif
 705
 706 /*****************************************************************************/
 707 /*
 708  * calibrate the delay loop
 709  */
 710 void __cpuinit calibrate_delay(void)
 711 {
 712         loops_per_jiffy = __delay_loops_MHz * (1000000 / HZ);
 713
 714         printk("Calibrating delay loop... %lu.%02lu BogoMIPS\n",
 715                loops_per_jiffy / (500000 / HZ),
 716                (loops_per_jiffy / (5000 / HZ)) % 100);
 717
 718 } /* end calibrate_delay() */
 719
 720 /*****************************************************************************/
 721 /*
 722  * look through the command line for some things we need to know immediately
 723  */
 724 static void __init parse_cmdline_early(char *cmdline)
 725 {
 726         if (!cmdline)
 727                 return;
 728
 729         while (*cmdline) {
 730                 if (*cmdline == ' ')
 731                         cmdline++;
 732
 733                 /* "mem=XXX[kKmM]" sets SDRAM size to <mem>, overriding the value we worked
 734                  * out from the SDRAM controller mask register
 735                  */
 736                 if (!memcmp(cmdline, "mem=", 4)) {
 737                         unsigned long long mem_size;
 738
 739                         mem_size = memparse(cmdline + 4, &cmdline);
 740                         memory_end = memory_start + mem_size;
 741                 }
 742
 743                 while (*cmdline && *cmdline != ' ')
 744                         cmdline++;
 745         }
 746
 747 } /* end parse_cmdline_early() */
 748
 749 /*****************************************************************************/
 750 /*
 751  *
 752  */
 753 void __init setup_arch(char **cmdline_p)
 754 {
 755 #ifdef CONFIG_MMU
 756         printk("Linux FR-V port done by Red Hat Inc <dhowells@redhat.com>\n");
 757 #else
 758         printk("uClinux FR-V port done by Red Hat Inc <dhowells@redhat.com>\n");
 759 #endif
 760
 761         memcpy(boot_command_line, redboot_command_line, COMMAND_LINE_SIZE);
 762
 763         determine_cpu();
 764         determine_clocks(1);
 765
 766         /* For printk-directly-beats-on-serial-hardware hack */
 767         console_set_baud(115200);
 768 #ifdef CONFIG_GDBSTUB
 769         gdbstub_set_baud(115200);
 770 #endif
 771
 772 #ifdef CONFIG_RESERVE_DMA_COHERENT
 773         reserve_dma_coherent();
 774 #endif
 775         dump_memory_map();
 776
 777 #ifdef CONFIG_MB93090_MB00
 778         if (mb93090_mb00_detected)
 779                 mb93090_display();
 780 #endif
 781
 782         /* register those serial ports that are available */
 783 #ifdef CONFIG_FRV_ONCPU_SERIAL
 784 #ifndef CONFIG_GDBSTUB_UART0
 785         __reg(UART0_BASE + UART_IER * 8) = 0;
 786         early_serial_setup(&__frv_uart0);
 787 #endif
 788 #ifndef CONFIG_GDBSTUB_UART1
 789         __reg(UART1_BASE + UART_IER * 8) = 0;
 790         early_serial_setup(&__frv_uart1);
 791 #endif
 792 #endif
 793
 794         /* deal with the command line - RedBoot may have passed one to the kernel */
 795         memcpy(command_line, boot_command_line, sizeof(command_line));
 796         *cmdline_p = &command_line[0];
 797         parse_cmdline_early(command_line);
 798
 799         /* set up the memory description
 800          * - by now the stack is part of the init task */
 801         printk("Memory %08lx-%08lx\n", memory_start, memory_end);
 802
 803         BUG_ON(memory_start == memory_end);
 804
 805         init_mm.start_code = (unsigned long) &_stext;
 806         init_mm.end_code = (unsigned long) &_etext;
 807         init_mm.end_data = (unsigned long) &_edata;
 808 #if 0 /* DAVIDM - don't set brk just incase someone decides to use it */
 809         init_mm.brk = (unsigned long) &_end;
 810 #else
 811         init_mm.brk = (unsigned long) 0;
 812 #endif
 813
 814 #ifdef DEBUG
 815         printk("KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x BSS=0x%06x-0x%06x\n",
 816                (int) &_stext, (int) &_etext,
 817                (int) &_sdata, (int) &_edata,
 818                (int) &_sbss, (int) &_ebss);
 819 #endif
 820
 821 #ifdef CONFIG_VT
 822 #if defined(CONFIG_VGA_CONSOLE)
 823         conswitchp = &vga_con;
 824 #elif defined(CONFIG_DUMMY_CONSOLE)
 825         conswitchp = &dummy_con;
 826 #endif
 827 #endif
 828
 829 #ifdef CONFIG_MMU
 830         setup_linux_memory();
 831 #else
 832         setup_uclinux_memory();
 833 #endif
 834
 835         /* get kmalloc into gear */
 836         paging_init();
 837
 838         /* init DMA */
 839         frv_dma_init();
 840 #ifdef DEBUG
 841         printk("Done setup_arch\n");
 842 #endif
 843
 844         /* start the decrement timer running */
 845 //      asm volatile("movgs %0,timerd" :: "r"(10000000));
 846 //      __set_HSR(0, __get_HSR(0) | HSR0_ETMD);
 847
 848 } /* end setup_arch() */
 849
 850 #if 0
 851 /*****************************************************************************/
 852 /*
 853  *
 854  */
 855 static int __devinit setup_arch_serial(void)
 856 {
 857         /* register those serial ports that are available */
 858 #ifndef CONFIG_GDBSTUB_UART0
 859         early_serial_setup(&__frv_uart0);
 860 #endif
 861 #ifndef CONFIG_GDBSTUB_UART1
 862         early_serial_setup(&__frv_uart1);
 863 #endif
 864
 865         return 0;
 866 } /* end setup_arch_serial() */
 867
 868 late_initcall(setup_arch_serial);
 869 #endif
 870
 871 /*****************************************************************************/
 872 /*
 873  * set up the memory map for normal MMU linux
 874  */
 875 #ifdef CONFIG_MMU
 876 static void __init setup_linux_memory(void)
 877 {
 878         unsigned long bootmap_size, low_top_pfn, kstart, kend, high_mem;
 879
 880         kstart  = (unsigned long) &__kernel_image_start - PAGE_OFFSET;
 881         kend    = (unsigned long) &__kernel_image_end - PAGE_OFFSET;
 882
 883         kstart = kstart & PAGE_MASK;
 884         kend = (kend + PAGE_SIZE - 1) & PAGE_MASK;
 885
 886         /* give all the memory to the bootmap allocator,  tell it to put the
 887          * boot mem_map immediately following the kernel image
 888          */
 889         bootmap_size = init_bootmem_node(NODE_DATA(0),
 890                                          kend >> PAGE_SHIFT,            /* map addr */
 891                                          memory_start >> PAGE_SHIFT,    /* start of RAM */
 892                                          memory_end >> PAGE_SHIFT       /* end of RAM */
 893                                          );
 894
 895         /* pass the memory that the kernel can immediately use over to the bootmem allocator */
 896         max_mapnr = num_physpages = (memory_end - memory_start) >> PAGE_SHIFT;
 897         low_top_pfn = (KERNEL_LOWMEM_END - KERNEL_LOWMEM_START) >> PAGE_SHIFT;
 898         high_mem = 0;
 899
 900         if (num_physpages > low_top_pfn) {
 901 #ifdef CONFIG_HIGHMEM
 902                 high_mem = num_physpages - low_top_pfn;
 903 #else
 904                 max_mapnr = num_physpages = low_top_pfn;
 905 #endif
 906         }
 907         else {
 908                 low_top_pfn = num_physpages;
 909         }
 910
 911         min_low_pfn = memory_start >> PAGE_SHIFT;
 912         max_low_pfn = low_top_pfn;
 913         max_pfn = memory_end >> PAGE_SHIFT;
 914
 915         num_mappedpages = low_top_pfn;
 916
 917         printk(KERN_NOTICE "%ldMB LOWMEM available.\n", low_top_pfn >> (20 - PAGE_SHIFT));
 918
 919         free_bootmem(memory_start, low_top_pfn << PAGE_SHIFT);
 920
 921 #ifdef CONFIG_HIGHMEM
 922         if (high_mem)
 923                 printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", high_mem >> (20 - PAGE_SHIFT));
 924 #endif
 925
 926         /* take back the memory occupied by the kernel image and the bootmem alloc map */
 927         reserve_bootmem(kstart, kend - kstart + bootmap_size,
 928                         BOOTMEM_DEFAULT);
 929
 930         /* reserve the memory occupied by the initial ramdisk */
 931 #ifdef CONFIG_BLK_DEV_INITRD
 932         if (LOADER_TYPE && INITRD_START) {
 933                 if (INITRD_START + INITRD_SIZE <= (low_top_pfn << PAGE_SHIFT)) {
 934                         reserve_bootmem(INITRD_START, INITRD_SIZE,
 935                                         BOOTMEM_DEFAULT);
 936                         initrd_start = INITRD_START + PAGE_OFFSET;
 937                         initrd_end = initrd_start + INITRD_SIZE;
 938                 }
 939                 else {
 940                         printk(KERN_ERR
 941                                "initrd extends beyond end of memory (0x%08lx > 0x%08lx)\n"
 942                                "disabling initrd\n",
 943                                INITRD_START + INITRD_SIZE,
 944                                low_top_pfn << PAGE_SHIFT);
 945                         initrd_start = 0;
 946                 }
 947         }
 948 #endif
 949
 950 } /* end setup_linux_memory() */
 951 #endif
 952
 953 /*****************************************************************************/
 954 /*
 955  * set up the memory map for uClinux
 956  */
 957 #ifndef CONFIG_MMU
 958 static void __init setup_uclinux_memory(void)
 959 {
 960 #ifdef CONFIG_PROTECT_KERNEL
 961         unsigned long dampr;
 962 #endif
 963         unsigned long kend;
 964         int bootmap_size;
 965
 966         kend = (unsigned long) &__kernel_image_end;
 967         kend = (kend + PAGE_SIZE - 1) & PAGE_MASK;
 968
 969         /* give all the memory to the bootmap allocator,  tell it to put the
 970          * boot mem_map immediately following the kernel image
 971          */
 972         bootmap_size = init_bootmem_node(NODE_DATA(0),
 973                                          kend >> PAGE_SHIFT,            /* map addr */
 974                                          memory_start >> PAGE_SHIFT,    /* start of RAM */
 975                                          memory_end >> PAGE_SHIFT       /* end of RAM */
 976                                          );
 977
 978         /* free all the usable memory */
 979         free_bootmem(memory_start, memory_end - memory_start);
 980
 981         high_memory = (void *) (memory_end & PAGE_MASK);
 982         max_mapnr = num_physpages = ((unsigned long) high_memory - PAGE_OFFSET) >> PAGE_SHIFT;
 983
 984         min_low_pfn = memory_start >> PAGE_SHIFT;
 985         max_low_pfn = memory_end >> PAGE_SHIFT;
 986         max_pfn = max_low_pfn;
 987
 988         /* now take back the bits the core kernel is occupying */
 989 #ifndef CONFIG_PROTECT_KERNEL
 990         reserve_bootmem(kend, bootmap_size, BOOTMEM_DEFAULT);
 991         reserve_bootmem((unsigned long) &__kernel_image_start,
 992                         kend - (unsigned long) &__kernel_image_start,
 993                         BOOTMEM_DEFAULT);
 994
 995 #else
 996         dampr = __get_DAMPR(0);
 997         dampr &= xAMPRx_SS;
 998         dampr = (dampr >> 4) + 17;
 999         dampr = 1 << dampr;
1000
1001         reserve_bootmem(__get_DAMPR(0) & xAMPRx_PPFN, dampr, BOOTMEM_DEFAULT);
1002 #endif
1003
1004         /* reserve some memory to do uncached DMA through if requested */
1005 #ifdef CONFIG_RESERVE_DMA_COHERENT
1006         if (dma_coherent_mem_start)
1007                 reserve_bootmem(dma_coherent_mem_start,
1008                                 dma_coherent_mem_end - dma_coherent_mem_start,
1009                                 BOOTMEM_DEFAULT);
1010 #endif
1011
1012 } /* end setup_uclinux_memory() */
1013 #endif
1014
1015 /*****************************************************************************/
1016 /*
1017  * get CPU information for use by procfs
1018  */
1019 static int show_cpuinfo(struct seq_file *m, void *v)
1020 {
1021         const char *gr, *fr, *fm, *fp, *cm, *nem, *ble;
1022 #ifdef CONFIG_PM
1023         const char *sep;
1024 #endif
1025
1026         gr  = cpu_hsr0_all & HSR0_GRHE  ? "gr0-63"      : "gr0-31";
1027         fr  = cpu_hsr0_all & HSR0_FRHE  ? "fr0-63"      : "fr0-31";
1028         fm  = cpu_psr_all  & PSR_EM     ? ", Media"     : "";
1029         fp  = cpu_psr_all  & PSR_EF     ? ", FPU"       : "";
1030         cm  = cpu_psr_all  & PSR_CM     ? ", CCCR"      : "";
1031         nem = cpu_psr_all  & PSR_NEM    ? ", NE"        : "";
1032         ble = cpu_psr_all  & PSR_BE     ? "BE"          : "LE";
1033
1034         seq_printf(m,
1035                    "CPU-Series:\t%s\n"
1036                    "CPU-Core:\t%s, %s, %s%s%s\n"
1037                    "CPU:\t\t%s\n"
1038                    "MMU:\t\t%s\n"
1039                    "FP-Media:\t%s%s%s\n"
1040                    "System:\t\t%s",
1041                    cpu_series,
1042                    cpu_core, gr, ble, cm, nem,
1043                    cpu_silicon,
1044                    cpu_mmu,
1045                    fr, fm, fp,
1046                    cpu_system);
1047
1048         if (cpu_board1)
1049                 seq_printf(m, ", %s", cpu_board1);
1050
1051         if (cpu_board2)
1052                 seq_printf(m, ", %s", cpu_board2);
1053
1054         seq_printf(m, "\n");
1055
1056 #ifdef CONFIG_PM
1057         seq_printf(m, "PM-Controls:");
1058         sep = "\t";
1059
1060         if (clock_bits_settable & CLOCK_BIT_CMODE) {
1061                 seq_printf(m, "%scmode=0x%04hx", sep, clock_cmodes_permitted);
1062                 sep = ", ";
1063         }
1064
1065         if (clock_bits_settable & CLOCK_BIT_CM) {
1066                 seq_printf(m, "%scm=0x%lx", sep, clock_bits_settable & CLOCK_BIT_CM);
1067                 sep = ", ";
1068         }
1069
1070         if (clock_bits_settable & CLOCK_BIT_P0) {
1071                 seq_printf(m, "%sp0=0x3", sep);
1072                 sep = ", ";
1073         }
1074
1075         seq_printf(m, "%ssuspend=0x22\n", sep);
1076 #endif
1077
1078         seq_printf(m,
1079                    "PM-Status:\tcmode=%d, cm=%d, p0=%d\n",
1080                    clock_cmode_current, clock_cm_current, clock_p0_current);
1081
1082 #define print_clk(TAG, VAR) \
1083         seq_printf(m, "Clock-" TAG ":\t%lu.%2.2lu MHz\n", VAR / 1000000, (VAR / 10000) % 100)
1084
1085         print_clk("In",    __clkin_clock_speed_HZ);
1086         print_clk("Core",  __core_clock_speed_HZ);
1087         print_clk("SDRAM", __sdram_clock_speed_HZ);
1088         print_clk("CBus",  __core_bus_clock_speed_HZ);
1089         print_clk("Res",   __res_bus_clock_speed_HZ);
1090         print_clk("Ext",   __ext_bus_clock_speed_HZ);
1091         print_clk("DSU",   __dsu_clock_speed_HZ);
1092
1093         seq_printf(m,
1094                    "BogoMips:\t%lu.%02lu\n",
1095                    (loops_per_jiffy * HZ) / 500000, ((loops_per_jiffy * HZ) / 5000) % 100);
1096
1097         return 0;
1098 } /* end show_cpuinfo() */
1099
1100 static void *c_start(struct seq_file *m, loff_t *pos)
1101 {
1102         return *pos < NR_CPUS ? (void *) 0x12345678 : NULL;
1103 }
1104
1105 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
1106 {
1107         ++*pos;
1108         return c_start(m, pos);
1109 }
1110
1111 static void c_stop(struct seq_file *m, void *v)
1112 {
1113 }
1114
1115 const struct seq_operations cpuinfo_op = {
1116         .start  = c_start,
1117         .next   = c_next,
1118         .stop   = c_stop,
1119         .show   = show_cpuinfo,
1120 };
1121
1122 void arch_gettod(int *year, int *mon, int *day, int *hour,
1123                  int *min, int *sec)
1124 {
1125         *year = *mon = *day = *hour = *min = *sec = 0;
1126 }
1127
1128 /*****************************************************************************/
1129 /*
1130  *
1131  */
1132 #ifdef CONFIG_MB93090_MB00
1133 static void __init mb93090_sendlcdcmd(uint32_t cmd)
1134 {
1135         unsigned long base = __addr_LCD();
1136         int loop;
1137
1138         /* request reading of the busy flag */
1139         __set_LCD(base, LCD_CMD_READ_BUSY);
1140         __set_LCD(base, LCD_CMD_READ_BUSY & ~LCD_E);
1141
1142         /* wait for the busy flag to become clear */
1143         for (loop = 10000; loop > 0; loop--)
1144                 if (!(__get_LCD(base) & 0x80))
1145                         break;
1146
1147         /* send the command */
1148         __set_LCD(base, cmd);
1149         __set_LCD(base, cmd & ~LCD_E);
1150
1151 } /* end mb93090_sendlcdcmd() */
1152
1153 /*****************************************************************************/
1154 /*
1155  * write to the MB93090 LEDs and LCD
1156  */
1157 static void __init mb93090_display(void)
1158 {
1159         const char *p;
1160
1161         __set_LEDS(0);
1162
1163         /* set up the LCD */
1164         mb93090_sendlcdcmd(LCD_CMD_CLEAR);
1165         mb93090_sendlcdcmd(LCD_CMD_FUNCSET(1,1,0));
1166         mb93090_sendlcdcmd(LCD_CMD_ON(0,0));
1167         mb93090_sendlcdcmd(LCD_CMD_HOME);
1168
1169         mb93090_sendlcdcmd(LCD_CMD_SET_DD_ADDR(0));
1170         for (p = mb93090_banner; *p; p++)
1171                 mb93090_sendlcdcmd(LCD_DATA_WRITE(*p));
1172
1173         mb93090_sendlcdcmd(LCD_CMD_SET_DD_ADDR(64));
1174         for (p = mb93090_version; *p; p++)
1175                 mb93090_sendlcdcmd(LCD_DATA_WRITE(*p));
1176
1177 } /* end mb93090_display() */
1178
1179 #endif // CONFIG_MB93090_MB00