arch/mips/include/asm/mach-loongson/pci.h

   1 /*
   2  * Copyright (c) 2008 Zhang Le <r0bertz@gentoo.org>
   3  * Copyright (c) 2009 Wu Zhangjin <wuzhangjin@gmail.com>
   4  *
   5  * This program is free software; you can redistribute it
   6  * and/or modify it under the terms of the GNU General
   7  * Public License as published by the Free Software
   8  * Foundation; either version 2 of the License, or (at your
   9  * option) any later version.
  10  */
  11
  12 #ifndef __ASM_MACH_LOONGSON_PCI_H_
  13 #define __ASM_MACH_LOONGSON_PCI_H_
  14
  15 extern struct pci_ops loongson_pci_ops;
  16
  17 /* this is an offset from mips_io_port_base */
  18 #define LOONGSON_PCI_IO_START   0x00004000UL
  19
  20 #ifdef CONFIG_CPU_SUPPORTS_ADDRWINCFG
  21
  22 /*
  23  * we use address window2 to map cpu address space to pci space
  24  * window2: cpu [1G, 2G] -> pci [1G, 2G]
  25  * why not use window 0 & 1? because they are used by cpu when booting.
  26  * window0: cpu [0, 256M] -> ddr [0, 256M]
  27  * window1: cpu [256M, 512M] -> pci [256M, 512M]
  28  */
  29
  30 /* the smallest LOONGSON_CPU_MEM_SRC can be 512M */
  31 #define LOONGSON_CPU_MEM_SRC    0x40000000ul            /* 1G */
  32 #define LOONGSON_PCI_MEM_DST    LOONGSON_CPU_MEM_SRC
  33
  34 #define LOONGSON_PCI_MEM_START  LOONGSON_PCI_MEM_DST
  35 #define LOONGSON_PCI_MEM_END    (0x80000000ul-1)        /* 2G */
  36
  37 #define MMAP_CPUTOPCI_SIZE      (LOONGSON_PCI_MEM_END - \
  38                                         LOONGSON_PCI_MEM_START + 1)
  39
  40 #else   /* loongson2f/32bit & loongson2e */
  41
  42 /* this pci memory space is mapped by pcimap in pci.c */
  43 #ifdef CONFIG_CPU_LOONGSON3
  44 #define LOONGSON_PCI_MEM_START  0x40000000UL
  45 #define LOONGSON_PCI_MEM_END    0x7effffffUL
  46 #else
  47 #define LOONGSON_PCI_MEM_START  LOONGSON_PCILO1_BASE
  48 #define LOONGSON_PCI_MEM_END    (LOONGSON_PCILO1_BASE + 0x04000000 * 2)
  49 #endif
  50 /* this is an offset from mips_io_port_base */
  51 #define LOONGSON_PCI_IO_START   0x00004000UL
  52
  53 #endif  /* !CONFIG_CPU_SUPPORTS_ADDRWINCFG */
  54
  55 #endif /* !__ASM_MACH_LOONGSON_PCI_H_ */