diff options
Diffstat (limited to 'arch/mips/include/asm/mach-loongson2ef/pci.h')
| -rw-r--r-- | arch/mips/include/asm/mach-loongson2ef/pci.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-loongson2ef/pci.h b/arch/mips/include/asm/mach-loongson2ef/pci.h new file mode 100644 index 000000000..5588c5bc5 --- /dev/null +++ b/arch/mips/include/asm/mach-loongson2ef/pci.h @@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (c) 2008 Zhang Le <r0bertz@gentoo.org> + * Copyright (c) 2009 Wu Zhangjin <wuzhangjin@gmail.com> + */ + +#ifndef __ASM_MACH_LOONGSON2EF_PCI_H_ +#define __ASM_MACH_LOONGSON2EF_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_LOONGSON2EF_PCI_H_ */ |