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
10extern 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