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_LOONGSON64_PCI_H_
8 #define __ASM_MACH_LOONGSON64_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 #ifdef CONFIG_CPU_LOONGSON3
39 #define LOONGSON_PCI_MEM_START	0x40000000UL
40 #define LOONGSON_PCI_MEM_END	0x7effffffUL
41 #else
42 #define LOONGSON_PCI_MEM_START	LOONGSON_PCILO1_BASE
43 #define LOONGSON_PCI_MEM_END	(LOONGSON_PCILO1_BASE + 0x04000000 * 2)
44 #endif
45 /* this is an offset from mips_io_port_base */
46 #define LOONGSON_PCI_IO_START	0x00004000UL
47 
48 #endif	/* !CONFIG_CPU_SUPPORTS_ADDRWINCFG */
49 
50 #endif /* !__ASM_MACH_LOONGSON64_PCI_H_ */
51