pci.h

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/*
 * Copyright (c) 2008 Zhang Le <[email protected]>
 * Copyright (c) 2009 Wu Zhangjin <[email protected]>
 *
 * This program is free software; you can redistribute it
 * and/or modify it under the terms of the GNU General
 * Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your
 * option) any later version.
 */

#ifndef __ASM_MACH_LOONGSON_PCI_H_
#define __ASM_MACH_LOONGSON_PCI_H_

extern struct pci_ops loongson_pci_ops;

/* this is an offset from mips_io_port_base */
#define LOONGSON_PCI_IO_START   0x00004000UL

#ifdef CONFIG_CPU_SUPPORTS_ADDRWINCFG

/*
 * we use address window2 to map cpu address space to pci space
 * window2: cpu [1G, 2G] -> pci [1G, 2G]
 * why not use window 0 & 1? because they are used by cpu when booting.
 * window0: cpu [0, 256M] -> ddr [0, 256M]
 * window1: cpu [256M, 512M] -> pci [256M, 512M]
 */

/* the smallest LOONGSON_CPU_MEM_SRC can be 512M */
#define LOONGSON_CPU_MEM_SRC    0x40000000ul        /* 1G */
#define LOONGSON_PCI_MEM_DST    LOONGSON_CPU_MEM_SRC

#define LOONGSON_PCI_MEM_START  LOONGSON_PCI_MEM_DST
#define LOONGSON_PCI_MEM_END    (0x80000000ul-1)    /* 2G */

#define MMAP_CPUTOPCI_SIZE  (LOONGSON_PCI_MEM_END - \
                    LOONGSON_PCI_MEM_START + 1)

#else   /* loongson2f/32bit & loongson2e */

/* this pci memory space is mapped by pcimap in pci.c */
#define LOONGSON_PCI_MEM_START  LOONGSON_PCILO1_BASE
#define LOONGSON_PCI_MEM_END    (LOONGSON_PCILO1_BASE + 0x04000000 * 2)
/* this is an offset from mips_io_port_base */
#define LOONGSON_PCI_IO_START   0x00004000UL

#endif  /* !CONFIG_CPU_SUPPORTS_ADDRWINCFG */

#endif /* !__ASM_MACH_LOONGSON_PCI_H_ */