1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * S390 version
4 * Copyright IBM Corp. 1999
5 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
6 *
7 * Derived from "include/asm-i386/io.h"
8 */
9
10 #ifndef _S390_IO_H
11 #define _S390_IO_H
12
13 #include <linux/kernel.h>
14 #include <asm/page.h>
15 #include <asm/pgtable.h>
16 #include <asm/pci_io.h>
17
18 #define xlate_dev_mem_ptr xlate_dev_mem_ptr
19 #define kc_xlate_dev_mem_ptr xlate_dev_mem_ptr
20 void *xlate_dev_mem_ptr(phys_addr_t phys);
21 #define unxlate_dev_mem_ptr unxlate_dev_mem_ptr
22 #define kc_unxlate_dev_mem_ptr unxlate_dev_mem_ptr
23 void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr);
24
25 #define IO_SPACE_LIMIT 0
26
27 /*
28 * I/O memory mapping functions.
29 */
30 #define ioremap_prot ioremap_prot
31 #define iounmap iounmap
32
33 #define _PAGE_IOREMAP pgprot_val(PAGE_KERNEL)
34
35 #define ioremap_wc(addr, size) \
36 ioremap_prot((addr), (size), pgprot_val(pgprot_writecombine(PAGE_KERNEL)))
37 #define ioremap_wt(addr, size) \
38 ioremap_prot((addr), (size), pgprot_val(pgprot_writethrough(PAGE_KERNEL)))
39
40 static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
41 {
42 return NULL;
43 }
44
45 static inline void ioport_unmap(void __iomem *p)
46 {
47 }
48
49 #ifdef CONFIG_PCI
50
51 /*
52 * s390 needs a private implementation of pci_iomap since ioremap with its
53 * offset parameter isn't sufficient. That's because BAR spaces are not
54 * disjunctive on s390 so we need the bar parameter of pci_iomap to find
55 * the corresponding device and create the mapping cookie.
56 */
57 #define pci_iomap pci_iomap
58 #define pci_iomap_range pci_iomap_range
59 #define pci_iounmap pci_iounmap
60 #define pci_iomap_wc pci_iomap_wc
61 #define pci_iomap_wc_range pci_iomap_wc_range
62
63 #define memcpy_fromio(dst, src, count) zpci_memcpy_fromio(dst, src, count)
64 #define memcpy_toio(dst, src, count) zpci_memcpy_toio(dst, src, count)
65 #define memset_io(dst, val, count) zpci_memset_io(dst, val, count)
66
67 #define mmiowb() zpci_barrier()
68
69 #define __raw_readb zpci_read_u8
70 #define __raw_readw zpci_read_u16
71 #define __raw_readl zpci_read_u32
72 #define __raw_readq zpci_read_u64
73 #define __raw_writeb zpci_write_u8
74 #define __raw_writew zpci_write_u16
75 #define __raw_writel zpci_write_u32
76 #define __raw_writeq zpci_write_u64
77
78 /* combine single writes by using store-block insn */
79 static inline void __iowrite32_copy(void __iomem *to, const void *from,
80 size_t count)
81 {
82 zpci_memcpy_toio(to, from, count * 4);
83 }
84 #define __iowrite32_copy __iowrite32_copy
85
86 static inline void __iowrite64_copy(void __iomem *to, const void *from,
87 size_t count)
88 {
89 zpci_memcpy_toio(to, from, count * 8);
90 }
91 #define __iowrite64_copy __iowrite64_copy
92
93 #endif /* CONFIG_PCI */
94
95 #include <asm-generic/io.h>
96
97 #endif
98
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