diff options
Diffstat (limited to 'arch/mips/include/asm/mach-loongson64/pci.h')
| -rw-r--r-- | arch/mips/include/asm/mach-loongson64/pci.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-loongson64/pci.h b/arch/mips/include/asm/mach-loongson64/pci.h new file mode 100644 index 000000000000..3401f557434a --- /dev/null +++ b/arch/mips/include/asm/mach-loongson64/pci.h @@ -0,0 +1,55 @@ +/* + * Copyright (c) 2008 Zhang Le <r0bertz@gentoo.org> + * Copyright (c) 2009 Wu Zhangjin <wuzhangjin@gmail.com> + * + * 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_LOONGSON64_PCI_H_ +#define __ASM_MACH_LOONGSON64_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 */ +#ifdef CONFIG_CPU_LOONGSON3 +#define LOONGSON_PCI_MEM_START 0x40000000UL +#define LOONGSON_PCI_MEM_END 0x7effffffUL +#else +#define LOONGSON_PCI_MEM_START LOONGSON_PCILO1_BASE +#define LOONGSON_PCI_MEM_END (LOONGSON_PCILO1_BASE + 0x04000000 * 2) +#endif +/* this is an offset from mips_io_port_base */ +#define LOONGSON_PCI_IO_START 0x00004000UL + +#endif /* !CONFIG_CPU_SUPPORTS_ADDRWINCFG */ + +#endif /* !__ASM_MACH_LOONGSON64_PCI_H_ */ |