51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
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/*
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* Copyright (c) 2008 Zhang Le <r0bertz@gentoo.org>
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* Copyright (c) 2009 Wu Zhangjin <wuzhangjin@gmail.com>
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*
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* This program is free software; you can redistribute it
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* and/or modify it under the terms of the GNU General
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* Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#ifndef __ASM_MACH_LOONGSON_PCI_H_
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#define __ASM_MACH_LOONGSON_PCI_H_
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extern struct pci_ops loongson_pci_ops;
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/* this is an offset from mips_io_port_base */
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#define LOONGSON_PCI_IO_START 0x00004000UL
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#ifdef CONFIG_CPU_SUPPORTS_ADDRWINCFG
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/*
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* we use address window2 to map cpu address space to pci space
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* window2: cpu [1G, 2G] -> pci [1G, 2G]
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* why not use window 0 & 1? because they are used by cpu when booting.
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* window0: cpu [0, 256M] -> ddr [0, 256M]
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* window1: cpu [256M, 512M] -> pci [256M, 512M]
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*/
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/* the smallest LOONGSON_CPU_MEM_SRC can be 512M */
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#define LOONGSON_CPU_MEM_SRC 0x40000000ul /* 1G */
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#define LOONGSON_PCI_MEM_DST LOONGSON_CPU_MEM_SRC
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#define LOONGSON_PCI_MEM_START LOONGSON_PCI_MEM_DST
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#define LOONGSON_PCI_MEM_END (0x80000000ul-1) /* 2G */
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#define MMAP_CPUTOPCI_SIZE (LOONGSON_PCI_MEM_END - \
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LOONGSON_PCI_MEM_START + 1)
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#else /* loongson2f/32bit & loongson2e */
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/* this pci memory space is mapped by pcimap in pci.c */
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#define LOONGSON_PCI_MEM_START LOONGSON_PCILO1_BASE
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#define LOONGSON_PCI_MEM_END (LOONGSON_PCILO1_BASE + 0x04000000 * 2)
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/* this is an offset from mips_io_port_base */
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#define LOONGSON_PCI_IO_START 0x00004000UL
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#endif /* !CONFIG_CPU_SUPPORTS_ADDRWINCFG */
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#endif /* !__ASM_MACH_LOONGSON_PCI_H_ */
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