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Linux kernel mirror (for testing)
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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
20void *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
23void 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_writecombine(PAGE_KERNEL))
37
38static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
39{
40 return NULL;
41}
42
43static inline void ioport_unmap(void __iomem *p)
44{
45}
46
47#ifdef CONFIG_PCI
48
49/*
50 * s390 needs a private implementation of pci_iomap since ioremap with its
51 * offset parameter isn't sufficient. That's because BAR spaces are not
52 * disjunctive on s390 so we need the bar parameter of pci_iomap to find
53 * the corresponding device and create the mapping cookie.
54 */
55#define pci_iomap pci_iomap
56#define pci_iomap_range pci_iomap_range
57#define pci_iounmap pci_iounmap
58#define pci_iomap_wc pci_iomap_wc
59#define pci_iomap_wc_range pci_iomap_wc_range
60
61#define memcpy_fromio(dst, src, count) zpci_memcpy_fromio(dst, src, count)
62#define memcpy_toio(dst, src, count) zpci_memcpy_toio(dst, src, count)
63#define memset_io(dst, val, count) zpci_memset_io(dst, val, count)
64
65#define mmiowb() zpci_barrier()
66
67#define __raw_readb zpci_read_u8
68#define __raw_readw zpci_read_u16
69#define __raw_readl zpci_read_u32
70#define __raw_readq zpci_read_u64
71#define __raw_writeb zpci_write_u8
72#define __raw_writew zpci_write_u16
73#define __raw_writel zpci_write_u32
74#define __raw_writeq zpci_write_u64
75
76/* combine single writes by using store-block insn */
77static inline void __iowrite32_copy(void __iomem *to, const void *from,
78 size_t count)
79{
80 zpci_memcpy_toio(to, from, count * 4);
81}
82#define __iowrite32_copy __iowrite32_copy
83
84static inline void __iowrite64_copy(void __iomem *to, const void *from,
85 size_t count)
86{
87 zpci_memcpy_toio(to, from, count * 8);
88}
89#define __iowrite64_copy __iowrite64_copy
90
91#endif /* CONFIG_PCI */
92
93#include <asm-generic/io.h>
94
95#endif