1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Copyright (c) 2008 Zhang Le <r0bertz@gentoo.org> 4 * Copyright (c) 2009 Wu Zhangjin <wuzhangjin@gmail.com> 5 */ 6 7 #ifndef __ASM_MACH_LOONGSON2EF_PCI_H_ 8 #define __ASM_MACH_LOONGSON2EF_PCI_H_ 9 10 extern struct pci_ops loongson_pci_ops; 11 12 /* this is an offset from mips_io_port_base */ 13 #define LOONGSON_PCI_IO_START 0x00004000UL 14 15 #ifdef CONFIG_CPU_SUPPORTS_ADDRWINCFG 16 17 /* 18 * we use address window2 to map cpu address space to pci space 19 * window2: cpu [1G, 2G] -> pci [1G, 2G] 20 * why not use window 0 & 1? because they are used by cpu when booting. 21 * window0: cpu [0, 256M] -> ddr [0, 256M] 22 * window1: cpu [256M, 512M] -> pci [256M, 512M] 23 */ 24 25 /* the smallest LOONGSON_CPU_MEM_SRC can be 512M */ 26 #define LOONGSON_CPU_MEM_SRC 0x40000000ul /* 1G */ 27 #define LOONGSON_PCI_MEM_DST LOONGSON_CPU_MEM_SRC 28 29 #define LOONGSON_PCI_MEM_START LOONGSON_PCI_MEM_DST 30 #define LOONGSON_PCI_MEM_END (0x80000000ul-1) /* 2G */ 31 32 #define MMAP_CPUTOPCI_SIZE (LOONGSON_PCI_MEM_END - \ 33 LOONGSON_PCI_MEM_START + 1) 34 35 #else /* loongson2f/32bit & loongson2e */ 36 37 /* this pci memory space is mapped by pcimap in pci.c */ 38 #define LOONGSON_PCI_MEM_START LOONGSON_PCILO1_BASE 39 #define LOONGSON_PCI_MEM_END (LOONGSON_PCILO1_BASE + 0x04000000 * 2) 40 41 /* this is an offset from mips_io_port_base */ 42 #define LOONGSON_PCI_IO_START 0x00004000UL 43 44 #endif /* !CONFIG_CPU_SUPPORTS_ADDRWINCFG */ 45 46 #endif /* !__ASM_MACH_LOONGSON2EF_PCI_H_ */ 47