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 15extern 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#define LOONGSON_PCI_MEM_START LOONGSON_PCILO1_BASE 44#define LOONGSON_PCI_MEM_END (LOONGSON_PCILO1_BASE + 0x04000000 * 2) 45/* this is an offset from mips_io_port_base */ 46#define LOONGSON_PCI_IO_START 0x00004000UL 47 48#endif /* !CONFIG_CPU_SUPPORTS_ADDRWINCFG */ 49 50#endif /* !__ASM_MACH_LOONGSON_PCI_H_ */ 51