arch/ppc/platforms/ev64260.c

   1 /*
   2  * Board setup routines for the Marvell/Galileo EV-64260-BP Evaluation Board.
   3  *
   4  * Author: Mark A. Greer <mgreer@mvista.com>
   5  *
   6  * 2001-2003 (c) MontaVista, Software, Inc.  This file is licensed under
   7  * the terms of the GNU General Public License version 2.  This program
   8  * is licensed "as is" without any warranty of any kind, whether express
   9  * or implied.
  10  */
  11
  12 /*
  13  * The EV-64260-BP port is the result of hard work from many people from
  14  * many companies.  In particular, employees of Marvell/Galileo, Mission
  15  * Critical Linux, Xyterra, and MontaVista Software were heavily involved.
  16  *
  17  * Note: I have not been able to get *all* PCI slots to work reliably
  18  *      at 66 MHz.  I recommend setting jumpers J15 & J16 to short pins 1&2
  19  *      so that 33 MHz is used. --MAG
  20  * Note: The 750CXe and 7450 are not stable with a 125MHz or 133MHz TCLK/SYSCLK.
  21  *      At 100MHz, they are solid.
  22  */
  23
  24 #include <linux/delay.h>
  25 #include <linux/pci.h>
  26 #include <linux/ide.h>
  27 #include <linux/irq.h>
  28 #include <linux/fs.h>
  29 #include <linux/seq_file.h>
  30 #include <linux/console.h>
  31 #include <linux/initrd.h>
  32 #include <linux/root_dev.h>
  33 #include <linux/platform_device.h>
  34 #if !defined(CONFIG_SERIAL_MPSC_CONSOLE)
  35 #include <linux/serial.h>
  36 #include <linux/tty.h>
  37 #include <linux/serial_core.h>
  38 #else
  39 #include <linux/mv643xx.h>
  40 #endif
  41 #include <asm/bootinfo.h>
  42 #include <asm/machdep.h>
  43 #include <asm/mv64x60.h>
  44 #include <asm/todc.h>
  45 #include <asm/time.h>
  46
  47 #include <platforms/ev64260.h>
  48
  49 #define BOARD_VENDOR    "Marvell/Galileo"
  50 #define BOARD_MACHINE   "EV-64260-BP"
  51
  52 static struct mv64x60_handle    bh;
  53
  54 #if !defined(CONFIG_SERIAL_MPSC_CONSOLE)
  55 extern void gen550_progress(char *, unsigned short);
  56 extern void gen550_init(int, struct uart_port *);
  57 #endif
  58
  59 static const unsigned int cpu_7xx[16] = { /* 7xx & 74xx (but not 745x) */
  60         18, 15, 14, 2, 4, 13, 5, 9, 6, 11, 8, 10, 16, 12, 7, 0
  61 };
  62 static const unsigned int cpu_745x[2][16] = { /* PLL_EXT 0 & 1 */
  63         { 1, 15, 14,  2,  4, 13,  5,  9,  6, 11,  8, 10, 16, 12,  7,  0 },
  64         { 0, 30,  0,  2,  0, 26,  0, 18,  0, 22, 20, 24, 28, 32,  0,  0 }
  65 };
  66
  67
  68 TODC_ALLOC();
  69
  70 static int
  71 ev64260_get_bus_speed(void)
  72 {
  73         return 100000000;
  74 }
  75
  76 static int
  77 ev64260_get_cpu_speed(void)
  78 {
  79         unsigned long   pvr, hid1, pll_ext;
  80
  81         pvr = PVR_VER(mfspr(SPRN_PVR));
  82
  83         if (pvr != PVR_VER(PVR_7450)) {
  84                 hid1 = mfspr(SPRN_HID1) >> 28;
  85                 return ev64260_get_bus_speed() * cpu_7xx[hid1]/2;
  86         }
  87         else {
  88                 hid1 = (mfspr(SPRN_HID1) & 0x0001e000) >> 13;
  89                 pll_ext = 0; /* No way to read; must get from schematic */
  90                 return ev64260_get_bus_speed() * cpu_745x[pll_ext][hid1]/2;
  91         }
  92 }
  93
  94 unsigned long __init
  95 ev64260_find_end_of_memory(void)
  96 {
  97         return mv64x60_get_mem_size(CONFIG_MV64X60_NEW_BASE,
  98                 MV64x60_TYPE_GT64260A);
  99 }
 100
 101 /*
 102  * Marvell/Galileo EV-64260-BP Evaluation Board PCI interrupt routing.
 103  * Note: By playing with J8 and JP1-4, you can get 2 IRQ's from the first
 104  *      PCI bus (in which cast, INTPIN B would be EV64260_PCI_1_IRQ).
 105  *      This is the most IRQs you can get from one bus with this board, though.
 106  */
 107 static int __init
 108 ev64260_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
 109 {
 110         struct pci_controller   *hose = pci_bus_to_hose(dev->bus->number);
 111
 112         if (hose->index == 0) {
 113                 static char pci_irq_table[][4] =
 114                 /*
 115                  *      PCI IDSEL/INTPIN->INTLINE
 116                  *         A   B   C   D
 117                  */
 118                 {
 119                         {EV64260_PCI_0_IRQ,0,0,0}, /* IDSEL 7 - PCI bus 0 */
 120                         {EV64260_PCI_0_IRQ,0,0,0}, /* IDSEL 8 - PCI bus 0 */
 121                 };
 122
 123                 const long min_idsel = 7, max_idsel = 8, irqs_per_slot = 4;
 124                 return PCI_IRQ_TABLE_LOOKUP;
 125         }
 126         else {
 127                 static char pci_irq_table[][4] =
 128                 /*
 129                  *      PCI IDSEL/INTPIN->INTLINE
 130                  *         A   B   C   D
 131                  */
 132                 {
 133                         { EV64260_PCI_1_IRQ,0,0,0}, /* IDSEL 7 - PCI bus 1 */
 134                         { EV64260_PCI_1_IRQ,0,0,0}, /* IDSEL 8 - PCI bus 1 */
 135                 };
 136
 137                 const long min_idsel = 7, max_idsel = 8, irqs_per_slot = 4;
 138                 return PCI_IRQ_TABLE_LOOKUP;
 139         }
 140 }
 141
 142 static void __init
 143 ev64260_setup_peripherals(void)
 144 {
 145         mv64x60_set_32bit_window(&bh, MV64x60_CPU2BOOT_WIN,
 146                 EV64260_EMB_FLASH_BASE, EV64260_EMB_FLASH_SIZE, 0);
 147         bh.ci->enable_window_32bit(&bh, MV64x60_CPU2BOOT_WIN);
 148         mv64x60_set_32bit_window(&bh, MV64x60_CPU2DEV_0_WIN,
 149                 EV64260_EXT_SRAM_BASE, EV64260_EXT_SRAM_SIZE, 0);
 150         bh.ci->enable_window_32bit(&bh, MV64x60_CPU2DEV_0_WIN);
 151         mv64x60_set_32bit_window(&bh, MV64x60_CPU2DEV_1_WIN,
 152                 EV64260_TODC_BASE, EV64260_TODC_SIZE, 0);
 153         bh.ci->enable_window_32bit(&bh, MV64x60_CPU2DEV_1_WIN);
 154         mv64x60_set_32bit_window(&bh, MV64x60_CPU2DEV_2_WIN,
 155                 EV64260_UART_BASE, EV64260_UART_SIZE, 0);
 156         bh.ci->enable_window_32bit(&bh, MV64x60_CPU2DEV_2_WIN);
 157         mv64x60_set_32bit_window(&bh, MV64x60_CPU2DEV_3_WIN,
 158                 EV64260_EXT_FLASH_BASE, EV64260_EXT_FLASH_SIZE, 0);
 159         bh.ci->enable_window_32bit(&bh, MV64x60_CPU2DEV_3_WIN);
 160
 161         TODC_INIT(TODC_TYPE_DS1501, 0, 0,
 162                         ioremap(EV64260_TODC_BASE, EV64260_TODC_SIZE), 8);
 163
 164         mv64x60_clr_bits(&bh, MV64x60_CPU_CONFIG,((1<<12) | (1<<28) | (1<<29)));
 165         mv64x60_set_bits(&bh, MV64x60_CPU_CONFIG, (1<<27));
 166
 167         if (ev64260_get_bus_speed() > 100000000)
 168                 mv64x60_set_bits(&bh, MV64x60_CPU_CONFIG, (1<<23));
 169
 170         mv64x60_set_bits(&bh, MV64x60_PCI0_PCI_DECODE_CNTL, ((1<<0) | (1<<3)));
 171         mv64x60_set_bits(&bh, MV64x60_PCI1_PCI_DECODE_CNTL, ((1<<0) | (1<<3)));
 172
 173         /*
 174          * Enabling of PCI internal-vs-external arbitration
 175          * is a platform- and errata-dependent decision.
 176          */
 177         if (bh.type == MV64x60_TYPE_GT64260A )  {
 178                 mv64x60_set_bits(&bh, MV64x60_PCI0_ARBITER_CNTL, (1<<31));
 179                 mv64x60_set_bits(&bh, MV64x60_PCI1_ARBITER_CNTL, (1<<31));
 180         }
 181
 182         mv64x60_set_bits(&bh, MV64x60_CPU_MASTER_CNTL, (1<<9)); /* Only 1 cpu */
 183
 184         /*
 185          * Turn off timer/counters.  Not turning off watchdog timer because
 186          * can't read its reg on the 64260A so don't know if we'll be enabling
 187          * or disabling.
 188          */
 189         mv64x60_clr_bits(&bh, MV64x60_TIMR_CNTR_0_3_CNTL,
 190                         ((1<<0) | (1<<8) | (1<<16) | (1<<24)));
 191         mv64x60_clr_bits(&bh, GT64260_TIMR_CNTR_4_7_CNTL,
 192                         ((1<<0) | (1<<8) | (1<<16) | (1<<24)));
 193
 194         /*
 195          * Set MPSC Multiplex RMII
 196          * NOTE: ethernet driver modifies bit 0 and 1
 197          */
 198         mv64x60_write(&bh, GT64260_MPP_SERIAL_PORTS_MULTIPLEX, 0x00001102);
 199
 200         /*
 201          * The EV-64260-BP uses several Multi-Purpose Pins (MPP) on the 64260
 202          * bridge as interrupt inputs (via the General Purpose Ports (GPP)
 203          * register).  Need to route the MPP inputs to the GPP and set the
 204          * polarity correctly.
 205          *
 206          * In MPP Control 2 Register
 207          *   MPP 21 -> GPP 21 (DUART channel A intr) bits 20-23 -> 0
 208          *   MPP 22 -> GPP 22 (DUART channel B intr) bits 24-27 -> 0
 209          */
 210         mv64x60_clr_bits(&bh, MV64x60_MPP_CNTL_2, (0xf<<20) | (0xf<<24) );
 211
 212         /*
 213          * In MPP Control 3 Register
 214          *   MPP 26 -> GPP 26 (RTC INT)         bits  8-11 -> 0
 215          *   MPP 27 -> GPP 27 (PCI 0 INTA)      bits 12-15 -> 0
 216          *   MPP 29 -> GPP 29 (PCI 1 INTA)      bits 20-23 -> 0
 217          */
 218         mv64x60_clr_bits(&bh, MV64x60_MPP_CNTL_3, (0xf<<8)|(0xf<<12)|(0xf<<20));
 219
 220 #define GPP_EXTERNAL_INTERRUPTS \
 221                 ((1<<21) | (1<<22) | (1<<26) | (1<<27) | (1<<29))
 222         /* DUART & PCI interrupts are inputs */
 223         mv64x60_clr_bits(&bh, MV64x60_GPP_IO_CNTL, GPP_EXTERNAL_INTERRUPTS);
 224         /* DUART & PCI interrupts are active low */
 225         mv64x60_set_bits(&bh, MV64x60_GPP_LEVEL_CNTL, GPP_EXTERNAL_INTERRUPTS);
 226
 227         /* Clear any pending interrupts for these inputs and enable them. */
 228         mv64x60_write(&bh, MV64x60_GPP_INTR_CAUSE, ~GPP_EXTERNAL_INTERRUPTS);
 229         mv64x60_set_bits(&bh, MV64x60_GPP_INTR_MASK, GPP_EXTERNAL_INTERRUPTS);
 230
 231         return;
 232 }
 233
 234 static void __init
 235 ev64260_setup_bridge(void)
 236 {
 237         struct mv64x60_setup_info       si;
 238         int                             i;
 239
 240         memset(&si, 0, sizeof(si));
 241
 242         si.phys_reg_base = CONFIG_MV64X60_NEW_BASE;
 243
 244         si.pci_0.enable_bus = 1;
 245         si.pci_0.pci_io.cpu_base = EV64260_PCI0_IO_CPU_BASE;
 246         si.pci_0.pci_io.pci_base_hi = 0;
 247         si.pci_0.pci_io.pci_base_lo = EV64260_PCI0_IO_PCI_BASE;
 248         si.pci_0.pci_io.size = EV64260_PCI0_IO_SIZE;
 249         si.pci_0.pci_io.swap = MV64x60_CPU2PCI_SWAP_NONE;
 250         si.pci_0.pci_mem[0].cpu_base = EV64260_PCI0_MEM_CPU_BASE;
 251         si.pci_0.pci_mem[0].pci_base_hi = 0;
 252         si.pci_0.pci_mem[0].pci_base_lo = EV64260_PCI0_MEM_PCI_BASE;
 253         si.pci_0.pci_mem[0].size = EV64260_PCI0_MEM_SIZE;
 254         si.pci_0.pci_mem[0].swap = MV64x60_CPU2PCI_SWAP_NONE;
 255         si.pci_0.pci_cmd_bits = 0;
 256         si.pci_0.latency_timer = 0x8;
 257
 258         si.pci_1.enable_bus = 1;
 259         si.pci_1.pci_io.cpu_base = EV64260_PCI1_IO_CPU_BASE;
 260         si.pci_1.pci_io.pci_base_hi = 0;
 261         si.pci_1.pci_io.pci_base_lo = EV64260_PCI1_IO_PCI_BASE;
 262         si.pci_1.pci_io.size = EV64260_PCI1_IO_SIZE;
 263         si.pci_1.pci_io.swap = MV64x60_CPU2PCI_SWAP_NONE;
 264         si.pci_1.pci_mem[0].cpu_base = EV64260_PCI1_MEM_CPU_BASE;
 265         si.pci_1.pci_mem[0].pci_base_hi = 0;
 266         si.pci_1.pci_mem[0].pci_base_lo = EV64260_PCI1_MEM_PCI_BASE;
 267         si.pci_1.pci_mem[0].size = EV64260_PCI1_MEM_SIZE;
 268         si.pci_1.pci_mem[0].swap = MV64x60_CPU2PCI_SWAP_NONE;
 269         si.pci_1.pci_cmd_bits = 0;
 270         si.pci_1.latency_timer = 0x8;
 271
 272         for (i=0; i<MV64x60_CPU2MEM_WINDOWS; i++) {
 273                 si.cpu_prot_options[i] = 0;
 274                 si.cpu_snoop_options[i] = GT64260_CPU_SNOOP_WB;
 275                 si.pci_0.acc_cntl_options[i] =
 276                         GT64260_PCI_ACC_CNTL_DREADEN |
 277                         GT64260_PCI_ACC_CNTL_RDPREFETCH |
 278                         GT64260_PCI_ACC_CNTL_RDLINEPREFETCH |
 279                         GT64260_PCI_ACC_CNTL_RDMULPREFETCH |
 280                         GT64260_PCI_ACC_CNTL_SWAP_NONE |
 281                         GT64260_PCI_ACC_CNTL_MBURST_32_BTYES;
 282                 si.pci_0.snoop_options[i] = GT64260_PCI_SNOOP_WB;
 283                 si.pci_1.acc_cntl_options[i] =
 284                         GT64260_PCI_ACC_CNTL_DREADEN |
 285                         GT64260_PCI_ACC_CNTL_RDPREFETCH |
 286                         GT64260_PCI_ACC_CNTL_RDLINEPREFETCH |
 287                         GT64260_PCI_ACC_CNTL_RDMULPREFETCH |
 288                         GT64260_PCI_ACC_CNTL_SWAP_NONE |
 289                         GT64260_PCI_ACC_CNTL_MBURST_32_BTYES;
 290                 si.pci_1.snoop_options[i] = GT64260_PCI_SNOOP_WB;
 291         }
 292
 293         /* Lookup PCI host bridges */
 294         if (mv64x60_init(&bh, &si))
 295                 printk(KERN_ERR "Bridge initialization failed.\n");
 296
 297         pci_dram_offset = 0; /* System mem at same addr on PCI & cpu bus */
 298         ppc_md.pci_swizzle = common_swizzle;
 299         ppc_md.pci_map_irq = ev64260_map_irq;
 300         ppc_md.pci_exclude_device = mv64x60_pci_exclude_device;
 301
 302         mv64x60_set_bus(&bh, 0, 0);
 303         bh.hose_a->first_busno = 0;
 304         bh.hose_a->last_busno = 0xff;
 305         bh.hose_a->last_busno = pciauto_bus_scan(bh.hose_a, 0);
 306
 307         bh.hose_b->first_busno = bh.hose_a->last_busno + 1;
 308         mv64x60_set_bus(&bh, 1, bh.hose_b->first_busno);
 309         bh.hose_b->last_busno = 0xff;
 310         bh.hose_b->last_busno = pciauto_bus_scan(bh.hose_b,
 311                 bh.hose_b->first_busno);
 312
 313         return;
 314 }
 315
 316 #if defined(CONFIG_SERIAL_8250) && !defined(CONFIG_SERIAL_MPSC_CONSOLE)
 317 static void __init
 318 ev64260_early_serial_map(void)
 319 {
 320         struct uart_port        port;
 321         static char             first_time = 1;
 322
 323         if (first_time) {
 324                 memset(&port, 0, sizeof(port));
 325
 326                 port.membase = ioremap(EV64260_SERIAL_0, EV64260_UART_SIZE);
 327                 port.irq = EV64260_UART_0_IRQ;
 328                 port.uartclk = BASE_BAUD * 16;
 329                 port.regshift = 2;
 330                 port.iotype = UPIO_MEM;
 331                 port.flags = STD_COM_FLAGS;
 332
 333 #if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
 334                 gen550_init(0, &port);
 335 #endif
 336
 337                 if (early_serial_setup(&port) != 0)
 338                         printk(KERN_WARNING "Early serial init of port 0"
 339                                 "failed\n");
 340
 341                 first_time = 0;
 342         }
 343
 344         return;
 345 }
 346 #elif defined(CONFIG_SERIAL_MPSC_CONSOLE)
 347 static void __init
 348 ev64260_early_serial_map(void)
 349 {
 350 }
 351 #endif
 352
 353 static void __init
 354 ev64260_setup_arch(void)
 355 {
 356         if (ppc_md.progress)
 357                 ppc_md.progress("ev64260_setup_arch: enter", 0);
 358
 359 #ifdef CONFIG_BLK_DEV_INITRD
 360         if (initrd_start)
 361                 ROOT_DEV = Root_RAM0;
 362         else
 363 #endif
 364 #ifdef  CONFIG_ROOT_NFS
 365                 ROOT_DEV = Root_NFS;
 366 #else
 367                 ROOT_DEV = Root_SDA2;
 368 #endif
 369
 370         if (ppc_md.progress)
 371                 ppc_md.progress("ev64260_setup_arch: Enabling L2 cache", 0);
 372
 373         /* Enable L2 and L3 caches (if 745x) */
 374         _set_L2CR(_get_L2CR() | L2CR_L2E);
 375         _set_L3CR(_get_L3CR() | L3CR_L3E);
 376
 377         if (ppc_md.progress)
 378                 ppc_md.progress("ev64260_setup_arch: Initializing bridge", 0);
 379
 380         ev64260_setup_bridge();         /* set up PCI bridge(s) */
 381         ev64260_setup_peripherals();    /* set up chip selects/GPP/MPP etc */
 382
 383         if (ppc_md.progress)
 384                 ppc_md.progress("ev64260_setup_arch: bridge init complete", 0);
 385
 386 #if defined(CONFIG_SERIAL_8250) || defined(CONFIG_SERIAL_MPSC_CONSOLE)
 387         ev64260_early_serial_map();
 388 #endif
 389
 390         printk(KERN_INFO "%s %s port (C) 2001 MontaVista Software, Inc."
 391                 "(source@mvista.com)\n", BOARD_VENDOR, BOARD_MACHINE);
 392
 393         if (ppc_md.progress)
 394                 ppc_md.progress("ev64260_setup_arch: exit", 0);
 395
 396         return;
 397 }
 398
 399 /* Platform device data fixup routines. */
 400 #if defined(CONFIG_SERIAL_MPSC)
 401 static void __init
 402 ev64260_fixup_mpsc_pdata(struct platform_device *pdev)
 403 {
 404         struct mpsc_pdata *pdata;
 405
 406         pdata = (struct mpsc_pdata *)pdev->dev.platform_data;
 407
 408         pdata->max_idle = 40;
 409         pdata->default_baud = EV64260_DEFAULT_BAUD;
 410         pdata->brg_clk_src = EV64260_MPSC_CLK_SRC;
 411         pdata->brg_clk_freq = EV64260_MPSC_CLK_FREQ;
 412
 413         return;
 414 }
 415
 416 static int
 417 ev64260_platform_notify(struct device *dev)
 418 {
 419         static struct {
 420                 char    *bus_id;
 421                 void    ((*rtn)(struct platform_device *pdev));
 422         } dev_map[] = {
 423                 { MPSC_CTLR_NAME ".0", ev64260_fixup_mpsc_pdata },
 424                 { MPSC_CTLR_NAME ".1", ev64260_fixup_mpsc_pdata },
 425         };
 426         struct platform_device  *pdev;
 427         int     i;
 428
 429         if (dev && dev->bus_id)
 430                 for (i=0; i<ARRAY_SIZE(dev_map); i++)
 431                         if (!strncmp(dev->bus_id, dev_map[i].bus_id,
 432                                 BUS_ID_SIZE)) {
 433
 434                                 pdev = container_of(dev,
 435                                         struct platform_device, dev);
 436                                 dev_map[i].rtn(pdev);
 437                         }
 438
 439         return 0;
 440 }
 441 #endif
 442
 443 static void
 444 ev64260_reset_board(void *addr)
 445 {
 446         local_irq_disable();
 447
 448         /* disable and invalidate the L2 cache */
 449         _set_L2CR(0);
 450         _set_L2CR(0x200000);
 451
 452         /* flush and disable L1 I/D cache */
 453         __asm__ __volatile__
 454         ("mfspr   3,1008\n\t"
 455          "ori   5,5,0xcc00\n\t"
 456          "ori   4,3,0xc00\n\t"
 457          "andc  5,3,5\n\t"
 458          "sync\n\t"
 459          "mtspr 1008,4\n\t"
 460          "isync\n\t"
 461          "sync\n\t"
 462          "mtspr 1008,5\n\t"
 463          "isync\n\t"
 464          "sync\n\t");
 465
 466         /* unmap any other random cs's that might overlap with bootcs */
 467         mv64x60_set_32bit_window(&bh, MV64x60_CPU2DEV_0_WIN, 0, 0, 0);
 468         bh.ci->disable_window_32bit(&bh, MV64x60_CPU2DEV_0_WIN);
 469         mv64x60_set_32bit_window(&bh, MV64x60_CPU2DEV_1_WIN, 0, 0, 0);
 470         bh.ci->disable_window_32bit(&bh, MV64x60_CPU2DEV_1_WIN);
 471         mv64x60_set_32bit_window(&bh, MV64x60_CPU2DEV_2_WIN, 0, 0, 0);
 472         bh.ci->disable_window_32bit(&bh, MV64x60_CPU2DEV_2_WIN);
 473         mv64x60_set_32bit_window(&bh, MV64x60_CPU2DEV_3_WIN, 0, 0, 0);
 474         bh.ci->disable_window_32bit(&bh, MV64x60_CPU2DEV_3_WIN);
 475
 476         /* map bootrom back in to gt @ reset defaults */
 477         mv64x60_set_32bit_window(&bh, MV64x60_CPU2BOOT_WIN,
 478                                                 0xff800000, 8*1024*1024, 0);
 479         bh.ci->enable_window_32bit(&bh, MV64x60_CPU2BOOT_WIN);
 480
 481         /* move reg base back to default, setup default pci0 */
 482         mv64x60_write(&bh, MV64x60_INTERNAL_SPACE_DECODE,
 483                 (1<<24) | CONFIG_MV64X60_BASE >> 20);
 484
 485         /* NOTE: FROM NOW ON no more GT_REGS accesses.. 0x1 is not mapped
 486          * via BAT or MMU, and MSR IR/DR is ON */
 487         /* SRR0 has system reset vector, SRR1 has default MSR value */
 488         /* rfi restores MSR from SRR1 and sets the PC to the SRR0 value */
 489         /* NOTE: assumes reset vector is at 0xfff00100 */
 490         __asm__ __volatile__
 491         ("mtspr   26, %0\n\t"
 492          "li      4,(1<<6)\n\t"
 493          "mtspr   27,4\n\t"
 494          "rfi\n\t"
 495          :: "r" (addr):"r4");
 496
 497         return;
 498 }
 499
 500 static void
 501 ev64260_restart(char *cmd)
 502 {
 503         volatile ulong  i = 10000000;
 504
 505         ev64260_reset_board((void *)0xfff00100);
 506
 507         while (i-- > 0);
 508         panic("restart failed\n");
 509 }
 510
 511 static void
 512 ev64260_halt(void)
 513 {
 514         local_irq_disable();
 515         while (1);
 516         /* NOTREACHED */
 517 }
 518
 519 static void
 520 ev64260_power_off(void)
 521 {
 522         ev64260_halt();
 523         /* NOTREACHED */
 524 }
 525
 526 static int
 527 ev64260_show_cpuinfo(struct seq_file *m)
 528 {
 529         uint pvid;
 530
 531         pvid = mfspr(SPRN_PVR);
 532         seq_printf(m, "vendor\t\t: " BOARD_VENDOR "\n");
 533         seq_printf(m, "machine\t\t: " BOARD_MACHINE "\n");
 534         seq_printf(m, "cpu MHz\t\t: %d\n", ev64260_get_cpu_speed()/1000/1000);
 535         seq_printf(m, "bus MHz\t\t: %d\n", ev64260_get_bus_speed()/1000/1000);
 536
 537         return 0;
 538 }
 539
 540 /* DS1501 RTC has too much variation to use RTC for calibration */
 541 static void __init
 542 ev64260_calibrate_decr(void)
 543 {
 544         ulong freq;
 545
 546         freq = ev64260_get_bus_speed()/4;
 547
 548         printk(KERN_INFO "time_init: decrementer frequency = %lu.%.6lu MHz\n",
 549                freq/1000000, freq%1000000);
 550
 551         tb_ticks_per_jiffy = freq / HZ;
 552         tb_to_us = mulhwu_scale_factor(freq, 1000000);
 553
 554         return;
 555 }
 556
 557 /*
 558  * Set BAT 3 to map 0xfb000000 to 0xfc000000 of physical memory space.
 559  */
 560 static __inline__ void
 561 ev64260_set_bat(void)
 562 {
 563         mb();
 564         mtspr(SPRN_DBAT1U, 0xfb0001fe);
 565         mtspr(SPRN_DBAT1L, 0xfb00002a);
 566         mb();
 567
 568         return;
 569 }
 570
 571 #if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
 572 static void __init
 573 ev64260_map_io(void)
 574 {
 575         io_block_mapping(0xfb000000, 0xfb000000, 0x01000000, _PAGE_IO);
 576 }
 577 #endif
 578
 579 void __init
 580 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 581               unsigned long r6, unsigned long r7)
 582 {
 583 #ifdef CONFIG_BLK_DEV_INITRD
 584         extern int      initrd_below_start_ok;
 585
 586         initrd_start=initrd_end=0;
 587         initrd_below_start_ok=0;
 588 #endif /* CONFIG_BLK_DEV_INITRD */
 589
 590         parse_bootinfo(find_bootinfo());
 591
 592         isa_mem_base = 0;
 593         isa_io_base = EV64260_PCI0_IO_CPU_BASE;
 594         pci_dram_offset = EV64260_PCI0_MEM_CPU_BASE;
 595
 596         loops_per_jiffy = ev64260_get_cpu_speed() / HZ;
 597
 598         ppc_md.setup_arch = ev64260_setup_arch;
 599         ppc_md.show_cpuinfo = ev64260_show_cpuinfo;
 600         ppc_md.init_IRQ = gt64260_init_irq;
 601         ppc_md.get_irq = gt64260_get_irq;
 602
 603         ppc_md.restart = ev64260_restart;
 604         ppc_md.power_off = ev64260_power_off;
 605         ppc_md.halt = ev64260_halt;
 606
 607         ppc_md.find_end_of_memory = ev64260_find_end_of_memory;
 608
 609         ppc_md.init = NULL;
 610
 611         ppc_md.time_init = todc_time_init;
 612         ppc_md.set_rtc_time = todc_set_rtc_time;
 613         ppc_md.get_rtc_time = todc_get_rtc_time;
 614         ppc_md.nvram_read_val = todc_direct_read_val;
 615         ppc_md.nvram_write_val = todc_direct_write_val;
 616         ppc_md.calibrate_decr = ev64260_calibrate_decr;
 617
 618         bh.p_base = CONFIG_MV64X60_NEW_BASE;
 619
 620         ev64260_set_bat();
 621
 622 #ifdef  CONFIG_SERIAL_8250
 623 #if defined(CONFIG_SERIAL_TEXT_DEBUG)
 624         ppc_md.setup_io_mappings = ev64260_map_io;
 625         ppc_md.progress = gen550_progress;
 626 #endif
 627 #if defined(CONFIG_KGDB)
 628         ppc_md.setup_io_mappings = ev64260_map_io;
 629         ppc_md.early_serial_map = ev64260_early_serial_map;
 630 #endif
 631 #elif defined(CONFIG_SERIAL_MPSC_CONSOLE)
 632 #ifdef  CONFIG_SERIAL_TEXT_DEBUG
 633         ppc_md.setup_io_mappings = ev64260_map_io;
 634         ppc_md.progress = mv64x60_mpsc_progress;
 635         mv64x60_progress_init(CONFIG_MV64X60_NEW_BASE);
 636 #endif  /* CONFIG_SERIAL_TEXT_DEBUG */
 637 #ifdef  CONFIG_KGDB
 638         ppc_md.setup_io_mappings = ev64260_map_io;
 639         ppc_md.early_serial_map = ev64260_early_serial_map;
 640 #endif  /* CONFIG_KGDB */
 641
 642 #endif
 643
 644 #if defined(CONFIG_SERIAL_MPSC)
 645         platform_notify = ev64260_platform_notify;
 646 #endif
 647
 648         return;
 649 }