git.oblomov.eu Git - linux-2.6/blob - arch/ppc/syslib/mpc10x_common.c

   1 /*
   2  * Common routines for the Motorola SPS MPC106, MPC107 and MPC8240 Host bridge,
   3  * Mem ctlr, EPIC, etc.
   4  *
   5  * Author: Mark A. Greer
   6  *         mgreer@mvista.com
   7  *
   8  * 2001 (c) MontaVista, Software, Inc.  This file is licensed under
   9  * the terms of the GNU General Public License version 2.  This program
  10  * is licensed "as is" without any warranty of any kind, whether express
  11  * or implied.
  12  */
  13
  14 /*
  15  * *** WARNING - A BAT MUST be set to access the PCI config addr/data regs ***
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/init.h>
  20 #include <linux/pci.h>
  21 #include <linux/slab.h>
  22 #include <linux/serial_8250.h>
  23 #include <linux/fsl_devices.h>
  24 #include <linux/device.h>
  25
  26 #include <asm/byteorder.h>
  27 #include <asm/io.h>
  28 #include <asm/irq.h>
  29 #include <asm/uaccess.h>
  30 #include <asm/machdep.h>
  31 #include <asm/pci-bridge.h>
  32 #include <asm/open_pic.h>
  33 #include <asm/mpc10x.h>
  34 #include <asm/ppc_sys.h>
  35
  36 #ifdef CONFIG_MPC10X_OPENPIC
  37 #ifdef CONFIG_EPIC_SERIAL_MODE
  38 #define EPIC_IRQ_BASE (epic_serial_mode ? 16 : 5)
  39 #else
  40 #define EPIC_IRQ_BASE 5
  41 #endif
  42 #define MPC10X_I2C_IRQ (EPIC_IRQ_BASE + NUM_8259_INTERRUPTS)
  43 #define MPC10X_DMA0_IRQ (EPIC_IRQ_BASE + 1 + NUM_8259_INTERRUPTS)
  44 #define MPC10X_DMA1_IRQ (EPIC_IRQ_BASE + 2 + NUM_8259_INTERRUPTS)
  45 #define MPC10X_UART0_IRQ (EPIC_IRQ_BASE + 4 + NUM_8259_INTERRUPTS)
  46 #define MPC10X_UART1_IRQ (EPIC_IRQ_BASE + 5 + NUM_8259_INTERRUPTS)
  47 #else
  48 #define MPC10X_I2C_IRQ -1
  49 #define MPC10X_DMA0_IRQ -1
  50 #define MPC10X_DMA1_IRQ -1
  51 #define MPC10X_UART0_IRQ -1
  52 #define MPC10X_UART1_IRQ -1
  53 #endif
  54
  55 static struct fsl_i2c_platform_data mpc10x_i2c_pdata = {
  56         .device_flags           = 0,
  57 };
  58
  59 static struct plat_serial8250_port serial_plat_uart0[] = {
  60         [0] = {
  61                 .mapbase        = 0x4500,
  62                 .iotype         = UPIO_MEM,
  63                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
  64         },
  65         { },
  66 };
  67 static struct plat_serial8250_port serial_plat_uart1[] = {
  68         [0] = {
  69                 .mapbase        = 0x4600,
  70                 .iotype         = UPIO_MEM,
  71                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
  72         },
  73         { },
  74 };
  75
  76 struct platform_device ppc_sys_platform_devices[] = {
  77         [MPC10X_IIC1] = {
  78                 .name   = "fsl-i2c",
  79                 .id     = 1,
  80                 .dev.platform_data = &mpc10x_i2c_pdata,
  81                 .num_resources = 2,
  82                 .resource = (struct resource[]) {
  83                         {
  84                                 .start  = MPC10X_EUMB_I2C_OFFSET,
  85                                 .end    = MPC10X_EUMB_I2C_OFFSET +
  86                                             MPC10X_EUMB_I2C_SIZE - 1,
  87                                 .flags  = IORESOURCE_MEM,
  88                         },
  89                         {
  90                                 .flags  = IORESOURCE_IRQ
  91                         },
  92                 },
  93         },
  94         [MPC10X_DMA0] = {
  95                 .name   = "fsl-dma",
  96                 .id     = 0,
  97                 .num_resources = 2,
  98                 .resource = (struct resource[]) {
  99                         {
 100                                 .start  = MPC10X_EUMB_DMA_OFFSET + 0x10,
 101                                 .end    = MPC10X_EUMB_DMA_OFFSET + 0x1f,
 102                                 .flags  = IORESOURCE_MEM,
 103                         },
 104                         {
 105                                 .flags  = IORESOURCE_IRQ,
 106                         },
 107                 },
 108         },
 109         [MPC10X_DMA1] = {
 110                 .name   = "fsl-dma",
 111                 .id     = 1,
 112                 .num_resources = 2,
 113                 .resource = (struct resource[]) {
 114                         {
 115                                 .start  = MPC10X_EUMB_DMA_OFFSET + 0x20,
 116                                 .end    = MPC10X_EUMB_DMA_OFFSET + 0x2f,
 117                                 .flags  = IORESOURCE_MEM,
 118                         },
 119                         {
 120                                 .flags  = IORESOURCE_IRQ,
 121                         },
 122                 },
 123         },
 124         [MPC10X_DMA1] = {
 125                 .name   = "fsl-dma",
 126                 .id     = 1,
 127                 .num_resources = 2,
 128                 .resource = (struct resource[]) {
 129                         {
 130                                 .start  = MPC10X_EUMB_DMA_OFFSET + 0x20,
 131                                 .end    = MPC10X_EUMB_DMA_OFFSET + 0x2f,
 132                                 .flags  = IORESOURCE_MEM,
 133                         },
 134                         {
 135                                 .flags  = IORESOURCE_IRQ,
 136                         },
 137                 },
 138         },
 139         [MPC10X_UART0] = {
 140                 .name = "serial8250",
 141                 .id     = PLAT8250_DEV_PLATFORM,
 142                 .dev.platform_data = serial_plat_uart0,
 143         },
 144         [MPC10X_UART1] = {
 145                 .name = "serial8250",
 146                 .id     = PLAT8250_DEV_PLATFORM1,
 147                 .dev.platform_data = serial_plat_uart1,
 148         },
 149
 150 };
 151
 152 /* We use the PCI ID to match on */
 153 struct ppc_sys_spec *cur_ppc_sys_spec;
 154 struct ppc_sys_spec ppc_sys_specs[] = {
 155         {
 156                 .ppc_sys_name   = "8245",
 157                 .mask           = 0xFFFFFFFF,
 158                 .value          = MPC10X_BRIDGE_8245,
 159                 .num_devices    = 5,
 160                 .device_list    = (enum ppc_sys_devices[])
 161                 {
 162                         MPC10X_IIC1, MPC10X_DMA0, MPC10X_DMA1, MPC10X_UART0, MPC10X_UART1,
 163                 },
 164         },
 165         {
 166                 .ppc_sys_name   = "8240",
 167                 .mask           = 0xFFFFFFFF,
 168                 .value          = MPC10X_BRIDGE_8240,
 169                 .num_devices    = 3,
 170                 .device_list    = (enum ppc_sys_devices[])
 171                 {
 172                         MPC10X_IIC1, MPC10X_DMA0, MPC10X_DMA1,
 173                 },
 174         },
 175         {
 176                 .ppc_sys_name   = "107",
 177                 .mask           = 0xFFFFFFFF,
 178                 .value          = MPC10X_BRIDGE_107,
 179                 .num_devices    = 3,
 180                 .device_list    = (enum ppc_sys_devices[])
 181                 {
 182                         MPC10X_IIC1, MPC10X_DMA0, MPC10X_DMA1,
 183                 },
 184         },
 185         {       /* default match */
 186                 .ppc_sys_name   = "",
 187                 .mask           = 0x00000000,
 188                 .value          = 0x00000000,
 189         },
 190 };
 191
 192 /*
 193  * mach_mpc10x_fixup: This function enables DUART mode if it detects
 194  * if it detects two UARTS in the platform device entries.
 195  */
 196 static int __init mach_mpc10x_fixup(struct platform_device *pdev)
 197 {
 198         if (strncmp (pdev->name, "serial8250", 10) == 0 && pdev->id == 1)
 199                 writeb(readb(serial_plat_uart1[0].membase + 0x11) | 0x1,
 200                                 serial_plat_uart1[0].membase + 0x11);
 201         return 0;
 202 }
 203
 204 static int __init mach_mpc10x_init(void)
 205 {
 206         ppc_sys_device_fixup = mach_mpc10x_fixup;
 207         return 0;
 208 }
 209 postcore_initcall(mach_mpc10x_init);
 210
 211 /* Set resources to match bridge memory map */
 212 void __init
 213 mpc10x_bridge_set_resources(int map, struct pci_controller *hose)
 214 {
 215
 216         switch (map) {
 217                 case MPC10X_MEM_MAP_A:
 218                         pci_init_resource(&hose->io_resource,
 219                                         0x00000000,
 220                                         0x3f7fffff,
 221                                         IORESOURCE_IO,
 222                                         "PCI host bridge");
 223
 224                         pci_init_resource (&hose->mem_resources[0],
 225                                         0xc0000000,
 226                                         0xfeffffff,
 227                                         IORESOURCE_MEM,
 228                                         "PCI host bridge");
 229                         break;
 230                 case MPC10X_MEM_MAP_B:
 231                         pci_init_resource(&hose->io_resource,
 232                                         0x00000000,
 233                                         0x00bfffff,
 234                                         IORESOURCE_IO,
 235                                         "PCI host bridge");
 236
 237                         pci_init_resource (&hose->mem_resources[0],
 238                                         0x80000000,
 239                                         0xfcffffff,
 240                                         IORESOURCE_MEM,
 241                                         "PCI host bridge");
 242                         break;
 243                 default:
 244                         printk("mpc10x_bridge_set_resources: "
 245                                         "Invalid map specified\n");
 246                         if (ppc_md.progress)
 247                                 ppc_md.progress("mpc10x:exit1", 0x100);
 248         }
 249 }
 250
 251 /*
 252  * Do some initialization and put the EUMB registers at the specified address
 253  * (also map the EPIC registers into virtual space--OpenPIC_Addr will be set).
 254  *
 255  * The EPIC is not on the 106, only the 8240 and 107.
 256  */
 257 int __init
 258 mpc10x_bridge_init(struct pci_controller *hose,
 259                    uint current_map,
 260                    uint new_map,
 261                    uint phys_eumb_base)
 262 {
 263         int     host_bridge, picr1, picr1_bit, i;
 264         ulong   pci_config_addr, pci_config_data;
 265         u_char  pir, byte;
 266
 267         if (ppc_md.progress) ppc_md.progress("mpc10x:enter", 0x100);
 268
 269         /* Set up for current map so we can get at config regs */
 270         switch (current_map) {
 271                 case MPC10X_MEM_MAP_A:
 272                         setup_indirect_pci(hose,
 273                                            MPC10X_MAPA_CNFG_ADDR,
 274                                            MPC10X_MAPA_CNFG_DATA);
 275                         break;
 276                 case MPC10X_MEM_MAP_B:
 277                         setup_indirect_pci(hose,
 278                                            MPC10X_MAPB_CNFG_ADDR,
 279                                            MPC10X_MAPB_CNFG_DATA);
 280                         break;
 281                 default:
 282                         printk("mpc10x_bridge_init: %s\n",
 283                                 "Invalid current map specified");
 284                         if (ppc_md.progress)
 285                                 ppc_md.progress("mpc10x:exit1", 0x100);
 286                         return -1;
 287         }
 288
 289         /* Make sure it's a supported bridge */
 290         early_read_config_dword(hose,
 291                                 0,
 292                                 PCI_DEVFN(0,0),
 293                                 PCI_VENDOR_ID,
 294                                 &host_bridge);
 295
 296         switch (host_bridge) {
 297                 case MPC10X_BRIDGE_106:
 298                 case MPC10X_BRIDGE_8240:
 299                 case MPC10X_BRIDGE_107:
 300                 case MPC10X_BRIDGE_8245:
 301                         break;
 302                 default:
 303                         if (ppc_md.progress)
 304                                 ppc_md.progress("mpc10x:exit2", 0x100);
 305                         return -1;
 306         }
 307
 308         switch (new_map) {
 309                 case MPC10X_MEM_MAP_A:
 310                         MPC10X_SETUP_HOSE(hose, A);
 311                         pci_config_addr = MPC10X_MAPA_CNFG_ADDR;
 312                         pci_config_data = MPC10X_MAPA_CNFG_DATA;
 313                         picr1_bit = MPC10X_CFG_PICR1_ADDR_MAP_A;
 314                         break;
 315                 case MPC10X_MEM_MAP_B:
 316                         MPC10X_SETUP_HOSE(hose, B);
 317                         pci_config_addr = MPC10X_MAPB_CNFG_ADDR;
 318                         pci_config_data = MPC10X_MAPB_CNFG_DATA;
 319                         picr1_bit = MPC10X_CFG_PICR1_ADDR_MAP_B;
 320                         break;
 321                 default:
 322                         printk("mpc10x_bridge_init: %s\n",
 323                                 "Invalid new map specified");
 324                         if (ppc_md.progress)
 325                                 ppc_md.progress("mpc10x:exit3", 0x100);
 326                         return -1;
 327         }
 328
 329         /* Make bridge use the 'new_map', if not already usng it */
 330         if (current_map != new_map) {
 331                 early_read_config_dword(hose,
 332                                         0,
 333                                         PCI_DEVFN(0,0),
 334                                         MPC10X_CFG_PICR1_REG,
 335                                         &picr1);
 336
 337                 picr1 = (picr1 & ~MPC10X_CFG_PICR1_ADDR_MAP_MASK) |
 338                          picr1_bit;
 339
 340                 early_write_config_dword(hose,
 341                                          0,
 342                                          PCI_DEVFN(0,0),
 343                                          MPC10X_CFG_PICR1_REG,
 344                                          picr1);
 345
 346                 asm volatile("sync");
 347
 348                 /* Undo old mappings & map in new cfg data/addr regs */
 349                 iounmap((void *)hose->cfg_addr);
 350                 iounmap((void *)hose->cfg_data);
 351
 352                 setup_indirect_pci(hose,
 353                                    pci_config_addr,
 354                                    pci_config_data);
 355         }
 356
 357         /* Setup resources to match map */
 358         mpc10x_bridge_set_resources(new_map, hose);
 359
 360         /*
 361          * Want processor accesses of 0xFDxxxxxx to be mapped
 362          * to PCI memory space at 0x00000000.  Do not want
 363          * host bridge to respond to PCI memory accesses of
 364          * 0xFDxxxxxx.  Do not want host bridge to respond
 365          * to PCI memory addresses 0xFD000000-0xFDFFFFFF;
 366          * want processor accesses from 0x000A0000-0x000BFFFF
 367          * to be forwarded to system memory.
 368          *
 369          * Only valid if not in agent mode and using MAP B.
 370          */
 371         if (new_map == MPC10X_MEM_MAP_B) {
 372                 early_read_config_byte(hose,
 373                                        0,
 374                                        PCI_DEVFN(0,0),
 375                                        MPC10X_CFG_MAPB_OPTIONS_REG,
 376                                        &byte);
 377
 378                 byte &= ~(MPC10X_CFG_MAPB_OPTIONS_PFAE  |
 379                           MPC10X_CFG_MAPB_OPTIONS_PCICH |
 380                           MPC10X_CFG_MAPB_OPTIONS_PROCCH);
 381
 382                 if (host_bridge != MPC10X_BRIDGE_106) {
 383                         byte |= MPC10X_CFG_MAPB_OPTIONS_CFAE;
 384                 }
 385
 386                 early_write_config_byte(hose,
 387                                         0,
 388                                         PCI_DEVFN(0,0),
 389                                         MPC10X_CFG_MAPB_OPTIONS_REG,
 390                                         byte);
 391         }
 392
 393         if (host_bridge != MPC10X_BRIDGE_106) {
 394                 early_read_config_byte(hose,
 395                                        0,
 396                                        PCI_DEVFN(0,0),
 397                                        MPC10X_CFG_PIR_REG,
 398                                        &pir);
 399
 400                 if (pir != MPC10X_CFG_PIR_HOST_BRIDGE) {
 401                         printk("Host bridge in Agent mode\n");
 402                         /* Read or Set LMBAR & PCSRBAR? */
 403                 }
 404
 405                 /* Set base addr of the 8240/107 EUMB.  */
 406                 early_write_config_dword(hose,
 407                                          0,
 408                                          PCI_DEVFN(0,0),
 409                                          MPC10X_CFG_EUMBBAR,
 410                                          phys_eumb_base);
 411 #ifdef CONFIG_MPC10X_OPENPIC
 412                 /* Map EPIC register part of EUMB into vitual memory  - PCORE
 413                    uses an i8259 instead of EPIC. */
 414                 OpenPIC_Addr =
 415                         ioremap(phys_eumb_base + MPC10X_EUMB_EPIC_OFFSET,
 416                                 MPC10X_EUMB_EPIC_SIZE);
 417 #endif
 418         }
 419
 420 #ifdef CONFIG_MPC10X_STORE_GATHERING
 421         mpc10x_enable_store_gathering(hose);
 422 #else
 423         mpc10x_disable_store_gathering(hose);
 424 #endif
 425
 426         /* setup platform devices for MPC10x bridges */
 427         identify_ppc_sys_by_id (host_bridge);
 428
 429         for (i = 0; i < cur_ppc_sys_spec->num_devices; i++) {
 430                 unsigned int dev_id = cur_ppc_sys_spec->device_list[i];
 431                 ppc_sys_fixup_mem_resource(&ppc_sys_platform_devices[dev_id],
 432                         phys_eumb_base);
 433         }
 434
 435         /* IRQ's are determined at runtime */
 436         ppc_sys_platform_devices[MPC10X_IIC1].resource[1].start = MPC10X_I2C_IRQ;
 437         ppc_sys_platform_devices[MPC10X_IIC1].resource[1].end = MPC10X_I2C_IRQ;
 438         ppc_sys_platform_devices[MPC10X_DMA0].resource[1].start = MPC10X_DMA0_IRQ;
 439         ppc_sys_platform_devices[MPC10X_DMA0].resource[1].end = MPC10X_DMA0_IRQ;
 440         ppc_sys_platform_devices[MPC10X_DMA1].resource[1].start = MPC10X_DMA1_IRQ;
 441         ppc_sys_platform_devices[MPC10X_DMA1].resource[1].end = MPC10X_DMA1_IRQ;
 442
 443         serial_plat_uart0[0].mapbase += phys_eumb_base;
 444         serial_plat_uart0[0].irq = MPC10X_UART0_IRQ;
 445         serial_plat_uart0[0].membase = ioremap(serial_plat_uart0[0].mapbase, 0x100);
 446
 447         serial_plat_uart1[0].mapbase += phys_eumb_base;
 448         serial_plat_uart1[0].irq = MPC10X_UART1_IRQ;
 449         serial_plat_uart1[0].membase = ioremap(serial_plat_uart1[0].mapbase, 0x100);
 450
 451         /*
 452          * 8240 erratum 26, 8241/8245 erratum 29, 107 erratum 23: speculative
 453          * PCI reads may return stale data so turn off.
 454          */
 455         if ((host_bridge == MPC10X_BRIDGE_8240)
 456                 || (host_bridge == MPC10X_BRIDGE_8245)
 457                 || (host_bridge == MPC10X_BRIDGE_107)) {
 458
 459                 early_read_config_dword(hose, 0, PCI_DEVFN(0,0),
 460                         MPC10X_CFG_PICR1_REG, &picr1);
 461
 462                 picr1 &= ~MPC10X_CFG_PICR1_SPEC_PCI_RD;
 463
 464                 early_write_config_dword(hose, 0, PCI_DEVFN(0,0),
 465                         MPC10X_CFG_PICR1_REG, picr1);
 466         }
 467
 468         /*
 469          * 8241/8245 erratum 28: PCI reads from local memory may return
 470          * stale data.  Workaround by setting PICR2[0] to disable copyback
 471          * optimization.  Oddly, the latest available user manual for the
 472          * 8245 (Rev 2., dated 10/2003) says PICR2[0] is reserverd.
 473          */
 474         if (host_bridge == MPC10X_BRIDGE_8245) {
 475                 u32     picr2;
 476
 477                 early_read_config_dword(hose, 0, PCI_DEVFN(0,0),
 478                         MPC10X_CFG_PICR2_REG, &picr2);
 479
 480                 picr2 |= MPC10X_CFG_PICR2_COPYBACK_OPT;
 481
 482                 early_write_config_dword(hose, 0, PCI_DEVFN(0,0),
 483                          MPC10X_CFG_PICR2_REG, picr2);
 484         }
 485
 486         if (ppc_md.progress) ppc_md.progress("mpc10x:exit", 0x100);
 487         return 0;
 488 }
 489
 490 /*
 491  * Need to make our own PCI config space access macros because
 492  * mpc10x_get_mem_size() is called before the data structures are set up for
 493  * the 'early_xxx' and 'indirect_xxx' routines to work.
 494  * Assumes bus 0.
 495  */
 496 #define MPC10X_CFG_read(val, addr, type, op)    *val = op((type)(addr))
 497 #define MPC10X_CFG_write(val, addr, type, op)   op((type *)(addr), (val))
 498
 499 #define MPC10X_PCI_OP(rw, size, type, op, mask)                         \
 500 static void                                                             \
 501 mpc10x_##rw##_config_##size(uint *cfg_addr, uint *cfg_data, int devfn, int offset, type val) \
 502 {                                                                       \
 503         out_be32(cfg_addr,                                              \
 504                  ((offset & 0xfc) << 24) | (devfn << 16)                \
 505                  | (0 << 8) | 0x80);                                    \
 506         MPC10X_CFG_##rw(val, cfg_data + (offset & mask), type, op);     \
 507         return;                                                         \
 508 }
 509
 510 MPC10X_PCI_OP(read,  byte,  u8 *, in_8, 3)
 511 MPC10X_PCI_OP(read,  dword, u32 *, in_le32, 0)
 512 #if 0   /* Not used */
 513 MPC10X_PCI_OP(write, byte,  u8, out_8, 3)
 514 MPC10X_PCI_OP(read,  word,  u16 *, in_le16, 2)
 515 MPC10X_PCI_OP(write, word,  u16, out_le16, 2)
 516 MPC10X_PCI_OP(write, dword, u32, out_le32, 0)
 517 #endif
 518
 519 /*
 520  * Read the memory controller registers to determine the amount of memory in
 521  * the system.  This assumes that the firmware has correctly set up the memory
 522  * controller registers.
 523  */
 524 unsigned long __init
 525 mpc10x_get_mem_size(uint mem_map)
 526 {
 527         uint                    *config_addr, *config_data, val;
 528         ulong                   start, end, total, offset;
 529         int                     i;
 530         u_char                  bank_enables;
 531
 532         switch (mem_map) {
 533                 case MPC10X_MEM_MAP_A:
 534                         config_addr = (uint *)MPC10X_MAPA_CNFG_ADDR;
 535                         config_data = (uint *)MPC10X_MAPA_CNFG_DATA;
 536                         break;
 537                 case MPC10X_MEM_MAP_B:
 538                         config_addr = (uint *)MPC10X_MAPB_CNFG_ADDR;
 539                         config_data = (uint *)MPC10X_MAPB_CNFG_DATA;
 540                         break;
 541                 default:
 542                         return 0;
 543         }
 544
 545         mpc10x_read_config_byte(config_addr,
 546                                 config_data,
 547                                 PCI_DEVFN(0,0),
 548                                 MPC10X_MCTLR_MEM_BANK_ENABLES,
 549                                 &bank_enables);
 550
 551         total = 0;
 552
 553         for (i=0; i<8; i++) {
 554                 if (bank_enables & (1 << i)) {
 555                         offset = MPC10X_MCTLR_MEM_START_1 + ((i > 3) ? 4 : 0);
 556                         mpc10x_read_config_dword(config_addr,
 557                                                  config_data,
 558                                                  PCI_DEVFN(0,0),
 559                                                  offset,
 560                                                  &val);
 561                         start = (val >> ((i & 3) << 3)) & 0xff;
 562
 563                         offset = MPC10X_MCTLR_EXT_MEM_START_1 + ((i>3) ? 4 : 0);
 564                         mpc10x_read_config_dword(config_addr,
 565                                                  config_data,
 566                                                  PCI_DEVFN(0,0),
 567                                                  offset,
 568                                                  &val);
 569                         val = (val >> ((i & 3) << 3)) & 0x03;
 570                         start = (val << 28) | (start << 20);
 571
 572                         offset = MPC10X_MCTLR_MEM_END_1 + ((i > 3) ? 4 : 0);
 573                         mpc10x_read_config_dword(config_addr,
 574                                                  config_data,
 575                                                  PCI_DEVFN(0,0),
 576                                                  offset,
 577                                                  &val);
 578                         end = (val >> ((i & 3) << 3)) & 0xff;
 579
 580                         offset = MPC10X_MCTLR_EXT_MEM_END_1 + ((i > 3) ? 4 : 0);
 581                         mpc10x_read_config_dword(config_addr,
 582                                                  config_data,
 583                                                  PCI_DEVFN(0,0),
 584                                                  offset,
 585                                                  &val);
 586                         val = (val >> ((i & 3) << 3)) & 0x03;
 587                         end = (val << 28) | (end << 20) | 0xfffff;
 588
 589                         total += (end - start + 1);
 590                 }
 591         }
 592
 593         return total;
 594 }
 595
 596 int __init
 597 mpc10x_enable_store_gathering(struct pci_controller *hose)
 598 {
 599         uint picr1;
 600
 601         early_read_config_dword(hose,
 602                                 0,
 603                                 PCI_DEVFN(0,0),
 604                                 MPC10X_CFG_PICR1_REG,
 605                                 &picr1);
 606
 607         picr1 |= MPC10X_CFG_PICR1_ST_GATH_EN;
 608
 609         early_write_config_dword(hose,
 610                                 0,
 611                                 PCI_DEVFN(0,0),
 612                                 MPC10X_CFG_PICR1_REG,
 613                                 picr1);
 614
 615         return 0;
 616 }
 617
 618 int __init
 619 mpc10x_disable_store_gathering(struct pci_controller *hose)
 620 {
 621         uint picr1;
 622
 623         early_read_config_dword(hose,
 624                                 0,
 625                                 PCI_DEVFN(0,0),
 626                                 MPC10X_CFG_PICR1_REG,
 627                                 &picr1);
 628
 629         picr1 &= ~MPC10X_CFG_PICR1_ST_GATH_EN;
 630
 631         early_write_config_dword(hose,
 632                                 0,
 633                                 PCI_DEVFN(0,0),
 634                                 MPC10X_CFG_PICR1_REG,
 635                                 picr1);
 636
 637         return 0;
 638 }
 639
 640 #ifdef CONFIG_MPC10X_OPENPIC
 641 void __init mpc10x_set_openpic(void)
 642 {
 643         /* Map external IRQs */
 644         openpic_set_sources(0, EPIC_IRQ_BASE, OpenPIC_Addr + 0x10200);
 645         /* Skip reserved space and map i2c and DMA Ch[01] */
 646         openpic_set_sources(EPIC_IRQ_BASE, 3, OpenPIC_Addr + 0x11020);
 647         /* Skip reserved space and map Message Unit Interrupt (I2O) */
 648         openpic_set_sources(EPIC_IRQ_BASE + 3, 1, OpenPIC_Addr + 0x110C0);
 649         /* Skip reserved space and map Serial Interupts */
 650         openpic_set_sources(EPIC_IRQ_BASE + 4, 2, OpenPIC_Addr + 0x11120);
 651
 652         openpic_init(NUM_8259_INTERRUPTS);
 653 }
 654 #endif