/* 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_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 [31mCONFIG_CPU_SUPPORTS_ADDRWINCFG[0m /* * 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 [31mCONFIG_CPU_LOONGSON3[0m #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_ */ |