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   1 /*
   2  * arch/ppc/syslib/mpc10x_common.c
   3  *
   4  * Common routines for the Motorola SPS MPC106, MPC107 and MPC8240 Host bridge,
   5  * Mem ctlr, EPIC, etc.
   6  *
   7  * Author: Mark A. Greer
   8  *         mgreer@mvista.com
   9  *
  10  * 2001 (c) MontaVista, Software, Inc.  This file is licensed under
  11  * the terms of the GNU General Public License version 2.  This program
  12  * is licensed "as is" without any warranty of any kind, whether express
  13  * or implied.
  14  */
  15
  16 /*
  17  * *** WARNING - A BAT MUST be set to access the PCI config addr/data regs ***
  18  */
  19
  20 #include <linux/kernel.h>
  21 #include <linux/init.h>
  22 #include <linux/pci.h>
  23 #include <linux/slab.h>
  24 #include <linux/serial_8250.h>
  25 #include <linux/fsl_devices.h>
  26 #include <linux/device.h>
  27
  28 #include <asm/byteorder.h>
  29 #include <asm/io.h>
  30 #include <asm/irq.h>
  31 #include <asm/uaccess.h>
  32 #include <asm/machdep.h>
  33 #include <asm/pci-bridge.h>
  34 #include <asm/open_pic.h>
  35 #include <asm/mpc10x.h>
  36 #include <asm/ppc_sys.h>
  37
  38 #ifdef CONFIG_MPC10X_OPENPIC
  39 #ifdef CONFIG_EPIC_SERIAL_MODE
  40 #define EPIC_IRQ_BASE (epic_serial_mode ? 16 : 5)
  41 #else
  42 #define EPIC_IRQ_BASE 5
  43 #endif
  44 #define MPC10X_I2C_IRQ (EPIC_IRQ_BASE + NUM_8259_INTERRUPTS)
  45 #define MPC10X_DMA0_IRQ (EPIC_IRQ_BASE + 1 + NUM_8259_INTERRUPTS)
  46 #define MPC10X_DMA1_IRQ (EPIC_IRQ_BASE + 2 + NUM_8259_INTERRUPTS)
  47 #define MPC10X_UART0_IRQ (EPIC_IRQ_BASE + 4 + NUM_8259_INTERRUPTS)
  48 #define MPC10X_UART1_IRQ (EPIC_IRQ_BASE + 5 + NUM_8259_INTERRUPTS)
  49 #else
  50 #define MPC10X_I2C_IRQ -1
  51 #define MPC10X_DMA0_IRQ -1
  52 #define MPC10X_DMA1_IRQ -1
  53 #define MPC10X_UART0_IRQ -1
  54 #define MPC10X_UART1_IRQ -1
  55 #endif
  56
  57 static struct fsl_i2c_platform_data mpc10x_i2c_pdata = {
  58         .device_flags           = 0,
  59 };
  60
  61 static struct plat_serial8250_port serial_plat_uart0[] = {
  62         [0] = {
  63                 .mapbase        = 0x4500,
  64                 .iotype         = UPIO_MEM,
  65                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
  66         },
  67         { },
  68 };
  69 static struct plat_serial8250_port serial_plat_uart1[] = {
  70         [0] = {
  71                 .mapbase        = 0x4600,
  72                 .iotype         = UPIO_MEM,
  73                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
  74         },
  75         { },
  76 };
  77
  78 struct platform_device ppc_sys_platform_devices[] = {
  79         [MPC10X_IIC1] = {
  80                 .name   = "fsl-i2c",
  81                 .id     = 1,
  82                 .dev.platform_data = &mpc10x_i2c_pdata,
  83                 .num_resources = 2,
  84                 .resource = (struct resource[]) {
  85                         {
  86                                 .start  = MPC10X_EUMB_I2C_OFFSET,
  87                                 .end    = MPC10X_EUMB_I2C_OFFSET +
  88                                             MPC10X_EUMB_I2C_SIZE - 1,
  89                                 .flags  = IORESOURCE_MEM,
  90                         },
  91                         {
  92                                 .flags  = IORESOURCE_IRQ
  93                         },
  94                 },
  95         },
  96         [MPC10X_DMA0] = {
  97                 .name   = "fsl-dma",
  98                 .id     = 0,
  99                 .num_resources = 2,
 100                 .resource = (struct resource[]) {
 101                         {
 102                                 .start  = MPC10X_EUMB_DMA_OFFSET + 0x10,
 103                                 .end    = MPC10X_EUMB_DMA_OFFSET + 0x1f,
 104                                 .flags  = IORESOURCE_MEM,
 105                         },
 106                         {
 107                                 .flags  = IORESOURCE_IRQ,
 108                         },
 109                 },
 110         },
 111         [MPC10X_DMA1] = {
 112                 .name   = "fsl-dma",
 113                 .id     = 1,
 114                 .num_resources = 2,
 115                 .resource = (struct resource[]) {
 116                         {
 117                                 .start  = MPC10X_EUMB_DMA_OFFSET + 0x20,
 118                                 .end    = MPC10X_EUMB_DMA_OFFSET + 0x2f,
 119                                 .flags  = IORESOURCE_MEM,
 120                         },
 121                         {
 122                                 .flags  = IORESOURCE_IRQ,
 123                         },
 124                 },
 125         },
 126         [MPC10X_DMA1] = {
 127                 .name   = "fsl-dma",
 128                 .id     = 1,
 129                 .num_resources = 2,
 130                 .resource = (struct resource[]) {
 131                         {
 132                                 .start  = MPC10X_EUMB_DMA_OFFSET + 0x20,
 133                                 .end    = MPC10X_EUMB_DMA_OFFSET + 0x2f,
 134                                 .flags  = IORESOURCE_MEM,
 135                         },
 136                         {
 137                                 .flags  = IORESOURCE_IRQ,
 138                         },
 139                 },
 140         },
 141         [MPC10X_UART0] = {
 142                 .name = "serial8250",
 143                 .id     = PLAT8250_DEV_PLATFORM,
 144                 .dev.platform_data = serial_plat_uart0,
 145         },
 146         [MPC10X_UART1] = {
 147                 .name = "serial8250",
 148                 .id     = PLAT8250_DEV_PLATFORM1,
 149                 .dev.platform_data = serial_plat_uart1,
 150         },
 151
 152 };
 153
 154 /* We use the PCI ID to match on */
 155 struct ppc_sys_spec *cur_ppc_sys_spec;
 156 struct ppc_sys_spec ppc_sys_specs[] = {
 157         {
 158                 .ppc_sys_name   = "8245",
 159                 .mask           = 0xFFFFFFFF,
 160                 .value          = MPC10X_BRIDGE_8245,
 161                 .num_devices    = 5,
 162                 .device_list    = (enum ppc_sys_devices[])
 163                 {
 164                         MPC10X_IIC1, MPC10X_DMA0, MPC10X_DMA1, MPC10X_UART0, MPC10X_UART1,
 165                 },
 166         },
 167         {
 168                 .ppc_sys_name   = "8240",
 169                 .mask           = 0xFFFFFFFF,
 170                 .value          = MPC10X_BRIDGE_8240,
 171                 .num_devices    = 3,
 172                 .device_list    = (enum ppc_sys_devices[])
 173                 {
 174                         MPC10X_IIC1, MPC10X_DMA0, MPC10X_DMA1,
 175                 },
 176         },
 177         {
 178                 .ppc_sys_name   = "107",
 179                 .mask           = 0xFFFFFFFF,
 180                 .value          = MPC10X_BRIDGE_107,
 181                 .num_devices    = 3,
 182                 .device_list    = (enum ppc_sys_devices[])
 183                 {
 184                         MPC10X_IIC1, MPC10X_DMA0, MPC10X_DMA1,
 185                 },
 186         },
 187         {       /* default match */
 188                 .ppc_sys_name   = "",
 189                 .mask           = 0x00000000,
 190                 .value          = 0x00000000,
 191         },
 192 };
 193
 194 /*
 195  * mach_mpc10x_fixup: This function enables DUART mode if it detects
 196  * if it detects two UARTS in the platform device entries.
 197  */
 198 static int __init mach_mpc10x_fixup(struct platform_device *pdev)
 199 {
 200         if (strncmp (pdev->name, "serial8250", 10) == 0 && pdev->id == 1)
 201                 writeb(readb(serial_plat_uart1[0].membase + 0x11) | 0x1,
 202                                 serial_plat_uart1[0].membase + 0x11);
 203         return 0;
 204 }
 205
 206 static int __init mach_mpc10x_init(void)
 207 {
 208         ppc_sys_device_fixup = mach_mpc10x_fixup;
 209         return 0;
 210 }
 211 postcore_initcall(mach_mpc10x_init);
 212
 213 /* Set resources to match bridge memory map */
 214 void __init
 215 mpc10x_bridge_set_resources(int map, struct pci_controller *hose)
 216 {
 217
 218         switch (map) {
 219                 case MPC10X_MEM_MAP_A:
 220                         pci_init_resource(&hose->io_resource,
 221                                         0x00000000,
 222                                         0x3f7fffff,
 223                                         IORESOURCE_IO,
 224                                         "PCI host bridge");
 225
 226                         pci_init_resource (&hose->mem_resources[0],
 227                                         0xc0000000,
 228                                         0xfeffffff,
 229                                         IORESOURCE_MEM,
 230                                         "PCI host bridge");
 231                         break;
 232                 case MPC10X_MEM_MAP_B:
 233                         pci_init_resource(&hose->io_resource,
 234                                         0x00000000,
 235                                         0x00bfffff,
 236                                         IORESOURCE_IO,
 237                                         "PCI host bridge");
 238
 239                         pci_init_resource (&hose->mem_resources[0],
 240                                         0x80000000,
 241                                         0xfcffffff,
 242                                         IORESOURCE_MEM,
 243                                         "PCI host bridge");
 244                         break;
 245                 default:
 246                         printk("mpc10x_bridge_set_resources: "
 247                                         "Invalid map specified\n");
 248                         if (ppc_md.progress)
 249                                 ppc_md.progress("mpc10x:exit1", 0x100);
 250         }
 251 }
 252
 253 /*
 254  * Do some initialization and put the EUMB registers at the specified address
 255  * (also map the EPIC registers into virtual space--OpenPIC_Addr will be set).
 256  *
 257  * The EPIC is not on the 106, only the 8240 and 107.
 258  */
 259 int __init
 260 mpc10x_bridge_init(struct pci_controller *hose,
 261                    uint current_map,
 262                    uint new_map,
 263                    uint phys_eumb_base)
 264 {
 265         int     host_bridge, picr1, picr1_bit, i;
 266         ulong   pci_config_addr, pci_config_data;
 267         u_char  pir, byte;
 268
 269         if (ppc_md.progress) ppc_md.progress("mpc10x:enter", 0x100);
 270
 271         /* Set up for current map so we can get at config regs */
 272         switch (current_map) {
 273                 case MPC10X_MEM_MAP_A:
 274                         setup_indirect_pci(hose,
 275                                            MPC10X_MAPA_CNFG_ADDR,
 276                                            MPC10X_MAPA_CNFG_DATA);
 277                         break;
 278                 case MPC10X_MEM_MAP_B:
 279                         setup_indirect_pci(hose,
 280                                            MPC10X_MAPB_CNFG_ADDR,
 281                                            MPC10X_MAPB_CNFG_DATA);
 282                         break;
 283                 default:
 284                         printk("mpc10x_bridge_init: %s\n",
 285                                 "Invalid current map specified");
 286                         if (ppc_md.progress)
 287                                 ppc_md.progress("mpc10x:exit1", 0x100);
 288                         return -1;
 289         }
 290
 291         /* Make sure it's a supported bridge */
 292         early_read_config_dword(hose,
 293                                 0,
 294                                 PCI_DEVFN(0,0),
 295                                 PCI_VENDOR_ID,
 296                                 &host_bridge);
 297
 298         switch (host_bridge) {
 299                 case MPC10X_BRIDGE_106:
 300                 case MPC10X_BRIDGE_8240:
 301                 case MPC10X_BRIDGE_107:
 302                 case MPC10X_BRIDGE_8245:
 303                         break;
 304                 default:
 305                         if (ppc_md.progress)
 306                                 ppc_md.progress("mpc10x:exit2", 0x100);
 307                         return -1;
 308         }
 309
 310         switch (new_map) {
 311                 case MPC10X_MEM_MAP_A:
 312                         MPC10X_SETUP_HOSE(hose, A);
 313                         pci_config_addr = MPC10X_MAPA_CNFG_ADDR;
 314                         pci_config_data = MPC10X_MAPA_CNFG_DATA;
 315                         picr1_bit = MPC10X_CFG_PICR1_ADDR_MAP_A;
 316                         break;
 317                 case MPC10X_MEM_MAP_B:
 318                         MPC10X_SETUP_HOSE(hose, B);
 319                         pci_config_addr = MPC10X_MAPB_CNFG_ADDR;
 320                         pci_config_data = MPC10X_MAPB_CNFG_DATA;
 321                         picr1_bit = MPC10X_CFG_PICR1_ADDR_MAP_B;
 322                         break;
 323                 default:
 324                         printk("mpc10x_bridge_init: %s\n",
 325                                 "Invalid new map specified");
 326                         if (ppc_md.progress)
 327                                 ppc_md.progress("mpc10x:exit3", 0x100);
 328                         return -1;
 329         }
 330
 331         /* Make bridge use the 'new_map', if not already usng it */
 332         if (current_map != new_map) {
 333                 early_read_config_dword(hose,
 334                                         0,
 335                                         PCI_DEVFN(0,0),
 336                                         MPC10X_CFG_PICR1_REG,
 337                                         &picr1);
 338
 339                 picr1 = (picr1 & ~MPC10X_CFG_PICR1_ADDR_MAP_MASK) |
 340                          picr1_bit;
 341
 342                 early_write_config_dword(hose,
 343                                          0,
 344                                          PCI_DEVFN(0,0),
 345                                          MPC10X_CFG_PICR1_REG,
 346                                          picr1);
 347
 348                 asm volatile("sync");
 349
 350                 /* Undo old mappings & map in new cfg data/addr regs */
 351                 iounmap((void *)hose->cfg_addr);
 352                 iounmap((void *)hose->cfg_data);
 353
 354                 setup_indirect_pci(hose,
 355                                    pci_config_addr,
 356                                    pci_config_data);
 357         }
 358
 359         /* Setup resources to match map */
 360         mpc10x_bridge_set_resources(new_map, hose);
 361
 362         /*
 363          * Want processor accesses of 0xFDxxxxxx to be mapped
 364          * to PCI memory space at 0x00000000.  Do not want
 365          * host bridge to respond to PCI memory accesses of
 366          * 0xFDxxxxxx.  Do not want host bridge to respond
 367          * to PCI memory addresses 0xFD000000-0xFDFFFFFF;
 368          * want processor accesses from 0x000A0000-0x000BFFFF
 369          * to be forwarded to system memory.
 370          *
 371          * Only valid if not in agent mode and using MAP B.
 372          */
 373         if (new_map == MPC10X_MEM_MAP_B) {
 374                 early_read_config_byte(hose,
 375                                        0,
 376                                        PCI_DEVFN(0,0),
 377                                        MPC10X_CFG_MAPB_OPTIONS_REG,
 378                                        &byte);
 379
 380                 byte &= ~(MPC10X_CFG_MAPB_OPTIONS_PFAE  |
 381                           MPC10X_CFG_MAPB_OPTIONS_PCICH |
 382                           MPC10X_CFG_MAPB_OPTIONS_PROCCH);
 383
 384                 if (host_bridge != MPC10X_BRIDGE_106) {
 385                         byte |= MPC10X_CFG_MAPB_OPTIONS_CFAE;
 386                 }
 387
 388                 early_write_config_byte(hose,
 389                                         0,
 390                                         PCI_DEVFN(0,0),
 391                                         MPC10X_CFG_MAPB_OPTIONS_REG,
 392                                         byte);
 393         }
 394
 395         if (host_bridge != MPC10X_BRIDGE_106) {
 396                 early_read_config_byte(hose,
 397                                        0,
 398                                        PCI_DEVFN(0,0),
 399                                        MPC10X_CFG_PIR_REG,
 400                                        &pir);
 401
 402                 if (pir != MPC10X_CFG_PIR_HOST_BRIDGE) {
 403                         printk("Host bridge in Agent mode\n");
 404                         /* Read or Set LMBAR & PCSRBAR? */
 405                 }
 406
 407                 /* Set base addr of the 8240/107 EUMB.  */
 408                 early_write_config_dword(hose,
 409                                          0,
 410                                          PCI_DEVFN(0,0),
 411                                          MPC10X_CFG_EUMBBAR,
 412                                          phys_eumb_base);
 413 #ifdef CONFIG_MPC10X_OPENPIC
 414                 /* Map EPIC register part of EUMB into vitual memory  - PCORE
 415                    uses an i8259 instead of EPIC. */
 416                 OpenPIC_Addr =
 417                         ioremap(phys_eumb_base + MPC10X_EUMB_EPIC_OFFSET,
 418                                 MPC10X_EUMB_EPIC_SIZE);
 419 #endif
 420         }
 421
 422 #ifdef CONFIG_MPC10X_STORE_GATHERING
 423         mpc10x_enable_store_gathering(hose);
 424 #else
 425         mpc10x_disable_store_gathering(hose);
 426 #endif
 427
 428         /* setup platform devices for MPC10x bridges */
 429         identify_ppc_sys_by_id (host_bridge);
 430
 431         for (i = 0; i < cur_ppc_sys_spec->num_devices; i++) {
 432                 unsigned int dev_id = cur_ppc_sys_spec->device_list[i];
 433                 ppc_sys_fixup_mem_resource(&ppc_sys_platform_devices[dev_id],
 434                         phys_eumb_base);
 435         }
 436
 437         /* IRQ's are determined at runtime */
 438         ppc_sys_platform_devices[MPC10X_IIC1].resource[1].start = MPC10X_I2C_IRQ;
 439         ppc_sys_platform_devices[MPC10X_IIC1].resource[1].end = MPC10X_I2C_IRQ;
 440         ppc_sys_platform_devices[MPC10X_DMA0].resource[1].start = MPC10X_DMA0_IRQ;
 441         ppc_sys_platform_devices[MPC10X_DMA0].resource[1].end = MPC10X_DMA0_IRQ;
 442         ppc_sys_platform_devices[MPC10X_DMA1].resource[1].start = MPC10X_DMA1_IRQ;
 443         ppc_sys_platform_devices[MPC10X_DMA1].resource[1].end = MPC10X_DMA1_IRQ;
 444
 445         serial_plat_uart0[0].mapbase += phys_eumb_base;
 446         serial_plat_uart0[0].irq = MPC10X_UART0_IRQ;
 447         serial_plat_uart0[0].membase = ioremap(serial_plat_uart0[0].mapbase, 0x100);
 448
 449         serial_plat_uart1[0].mapbase += phys_eumb_base;
 450         serial_plat_uart1[0].irq = MPC10X_UART1_IRQ;
 451         serial_plat_uart1[0].membase = ioremap(serial_plat_uart1[0].mapbase, 0x100);
 452
 453         /*
 454          * 8240 erratum 26, 8241/8245 erratum 29, 107 erratum 23: speculative
 455          * PCI reads may return stale data so turn off.
 456          */
 457         if ((host_bridge == MPC10X_BRIDGE_8240)
 458                 || (host_bridge == MPC10X_BRIDGE_8245)
 459                 || (host_bridge == MPC10X_BRIDGE_107)) {
 460
 461                 early_read_config_dword(hose, 0, PCI_DEVFN(0,0),
 462                         MPC10X_CFG_PICR1_REG, &picr1);
 463
 464                 picr1 &= ~MPC10X_CFG_PICR1_SPEC_PCI_RD;
 465
 466                 early_write_config_dword(hose, 0, PCI_DEVFN(0,0),
 467                         MPC10X_CFG_PICR1_REG, picr1);
 468         }
 469
 470         /*
 471          * 8241/8245 erratum 28: PCI reads from local memory may return
 472          * stale data.  Workaround by setting PICR2[0] to disable copyback
 473          * optimization.  Oddly, the latest available user manual for the
 474          * 8245 (Rev 2., dated 10/2003) says PICR2[0] is reserverd.
 475          */
 476         if (host_bridge == MPC10X_BRIDGE_8245) {
 477                 u32     picr2;
 478
 479                 early_read_config_dword(hose, 0, PCI_DEVFN(0,0),
 480                         MPC10X_CFG_PICR2_REG, &picr2);
 481
 482                 picr2 |= MPC10X_CFG_PICR2_COPYBACK_OPT;
 483
 484                 early_write_config_dword(hose, 0, PCI_DEVFN(0,0),
 485                          MPC10X_CFG_PICR2_REG, picr2);
 486         }
 487
 488         if (ppc_md.progress) ppc_md.progress("mpc10x:exit", 0x100);
 489         return 0;
 490 }
 491
 492 /*
 493  * Need to make our own PCI config space access macros because
 494  * mpc10x_get_mem_size() is called before the data structures are set up for
 495  * the 'early_xxx' and 'indirect_xxx' routines to work.
 496  * Assumes bus 0.
 497  */
 498 #define MPC10X_CFG_read(val, addr, type, op)    *val = op((type)(addr))
 499 #define MPC10X_CFG_write(val, addr, type, op)   op((type *)(addr), (val))
 500
 501 #define MPC10X_PCI_OP(rw, size, type, op, mask)                         \
 502 static void                                                             \
 503 mpc10x_##rw##_config_##size(uint *cfg_addr, uint *cfg_data, int devfn, int offset, type val) \
 504 {                                                                       \
 505         out_be32(cfg_addr,                                              \
 506                  ((offset & 0xfc) << 24) | (devfn << 16)                \
 507                  | (0 << 8) | 0x80);                                    \
 508         MPC10X_CFG_##rw(val, cfg_data + (offset & mask), type, op);     \
 509         return;                                                         \
 510 }
 511
 512 MPC10X_PCI_OP(read,  byte,  u8 *, in_8, 3)
 513 MPC10X_PCI_OP(read,  dword, u32 *, in_le32, 0)
 514 #if 0   /* Not used */
 515 MPC10X_PCI_OP(write, byte,  u8, out_8, 3)
 516 MPC10X_PCI_OP(read,  word,  u16 *, in_le16, 2)
 517 MPC10X_PCI_OP(write, word,  u16, out_le16, 2)
 518 MPC10X_PCI_OP(write, dword, u32, out_le32, 0)
 519 #endif
 520
 521 /*
 522  * Read the memory controller registers to determine the amount of memory in
 523  * the system.  This assumes that the firmware has correctly set up the memory
 524  * controller registers.
 525  */
 526 unsigned long __init
 527 mpc10x_get_mem_size(uint mem_map)
 528 {
 529         uint                    *config_addr, *config_data, val;
 530         ulong                   start, end, total, offset;
 531         int                     i;
 532         u_char                  bank_enables;
 533
 534         switch (mem_map) {
 535                 case MPC10X_MEM_MAP_A:
 536                         config_addr = (uint *)MPC10X_MAPA_CNFG_ADDR;
 537                         config_data = (uint *)MPC10X_MAPA_CNFG_DATA;
 538                         break;
 539                 case MPC10X_MEM_MAP_B:
 540                         config_addr = (uint *)MPC10X_MAPB_CNFG_ADDR;
 541                         config_data = (uint *)MPC10X_MAPB_CNFG_DATA;
 542                         break;
 543                 default:
 544                         return 0;
 545         }
 546
 547         mpc10x_read_config_byte(config_addr,
 548                                 config_data,
 549                                 PCI_DEVFN(0,0),
 550                                 MPC10X_MCTLR_MEM_BANK_ENABLES,
 551                                 &bank_enables);
 552
 553         total = 0;
 554
 555         for (i=0; i<8; i++) {
 556                 if (bank_enables & (1 << i)) {
 557                         offset = MPC10X_MCTLR_MEM_START_1 + ((i > 3) ? 4 : 0);
 558                         mpc10x_read_config_dword(config_addr,
 559                                                  config_data,
 560                                                  PCI_DEVFN(0,0),
 561                                                  offset,
 562                                                  &val);
 563                         start = (val >> ((i & 3) << 3)) & 0xff;
 564
 565                         offset = MPC10X_MCTLR_EXT_MEM_START_1 + ((i>3) ? 4 : 0);
 566                         mpc10x_read_config_dword(config_addr,
 567                                                  config_data,
 568                                                  PCI_DEVFN(0,0),
 569                                                  offset,
 570                                                  &val);
 571                         val = (val >> ((i & 3) << 3)) & 0x03;
 572                         start = (val << 28) | (start << 20);
 573
 574                         offset = MPC10X_MCTLR_MEM_END_1 + ((i > 3) ? 4 : 0);
 575                         mpc10x_read_config_dword(config_addr,
 576                                                  config_data,
 577                                                  PCI_DEVFN(0,0),
 578                                                  offset,
 579                                                  &val);
 580                         end = (val >> ((i & 3) << 3)) & 0xff;
 581
 582                         offset = MPC10X_MCTLR_EXT_MEM_END_1 + ((i > 3) ? 4 : 0);
 583                         mpc10x_read_config_dword(config_addr,
 584                                                  config_data,
 585                                                  PCI_DEVFN(0,0),
 586                                                  offset,
 587                                                  &val);
 588                         val = (val >> ((i & 3) << 3)) & 0x03;
 589                         end = (val << 28) | (end << 20) | 0xfffff;
 590
 591                         total += (end - start + 1);
 592                 }
 593         }
 594
 595         return total;
 596 }
 597
 598 int __init
 599 mpc10x_enable_store_gathering(struct pci_controller *hose)
 600 {
 601         uint picr1;
 602
 603         early_read_config_dword(hose,
 604                                 0,
 605                                 PCI_DEVFN(0,0),
 606                                 MPC10X_CFG_PICR1_REG,
 607                                 &picr1);
 608
 609         picr1 |= MPC10X_CFG_PICR1_ST_GATH_EN;
 610
 611         early_write_config_dword(hose,
 612                                 0,
 613                                 PCI_DEVFN(0,0),
 614                                 MPC10X_CFG_PICR1_REG,
 615                                 picr1);
 616
 617         return 0;
 618 }
 619
 620 int __init
 621 mpc10x_disable_store_gathering(struct pci_controller *hose)
 622 {
 623         uint picr1;
 624
 625         early_read_config_dword(hose,
 626                                 0,
 627                                 PCI_DEVFN(0,0),
 628                                 MPC10X_CFG_PICR1_REG,
 629                                 &picr1);
 630
 631         picr1 &= ~MPC10X_CFG_PICR1_ST_GATH_EN;
 632
 633         early_write_config_dword(hose,
 634                                 0,
 635                                 PCI_DEVFN(0,0),
 636                                 MPC10X_CFG_PICR1_REG,
 637                                 picr1);
 638
 639         return 0;
 640 }
 641
 642 #ifdef CONFIG_MPC10X_OPENPIC
 643 void __init mpc10x_set_openpic(void)
 644 {
 645         /* Map external IRQs */
 646         openpic_set_sources(0, EPIC_IRQ_BASE, OpenPIC_Addr + 0x10200);
 647         /* Skip reserved space and map i2c and DMA Ch[01] */
 648         openpic_set_sources(EPIC_IRQ_BASE, 3, OpenPIC_Addr + 0x11020);
 649         /* Skip reserved space and map Message Unit Interrupt (I2O) */
 650         openpic_set_sources(EPIC_IRQ_BASE + 3, 1, OpenPIC_Addr + 0x110C0);
 651         /* Skip reserved space and map Serial Interupts */
 652         openpic_set_sources(EPIC_IRQ_BASE + 4, 2, OpenPIC_Addr + 0x11120);
 653
 654         openpic_init(NUM_8259_INTERRUPTS);
 655 }
 656 #endif