1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __SPARC_IO_H
3#define __SPARC_IO_H
4
5#include <linux/kernel.h>
6#include <linux/ioport.h>  /* struct resource */
7
8#define IO_SPACE_LIMIT 0xffffffff
9
10#define memset_io(d,c,sz)     _memset_io(d,c,sz)
11#define memcpy_fromio(d,s,sz) _memcpy_fromio(d,s,sz)
12#define memcpy_toio(d,s,sz)   _memcpy_toio(d,s,sz)
13
14/*
15 * Bus number may be embedded in the higher bits of the physical address.
16 * This is why we have no bus number argument to ioremap().
17 */
18void __iomem *ioremap(phys_addr_t offset, size_t size);
19void iounmap(volatile void __iomem *addr);
20
21#include <asm-generic/io.h>
22
23static inline void _memset_io(volatile void __iomem *dst,
24                              int c, __kernel_size_t n)
25{
26	volatile void __iomem *d = dst;
27
28	while (n--) {
29		writeb(c, d);
30		d++;
31	}
32}
33
34static inline void _memcpy_fromio(void *dst, const volatile void __iomem *src,
35                                  __kernel_size_t n)
36{
37	char *d = dst;
38
39	while (n--) {
40		char tmp = readb(src);
41		*d++ = tmp;
42		src++;
43	}
44}
45
46static inline void _memcpy_toio(volatile void __iomem *dst, const void *src,
47                                __kernel_size_t n)
48{
49	const char *s = src;
50	volatile void __iomem *d = dst;
51
52	while (n--) {
53		char tmp = *s++;
54		writeb(tmp, d);
55		d++;
56	}
57}
58
59/*
60 * SBus accessors.
61 *
62 * SBus has only one, memory mapped, I/O space.
63 * We do not need to flip bytes for SBus of course.
64 */
65static inline u8 sbus_readb(const volatile void __iomem *addr)
66{
67	return *(__force volatile u8 *)addr;
68}
69
70static inline u16 sbus_readw(const volatile void __iomem *addr)
71{
72	return *(__force volatile u16 *)addr;
73}
74
75static inline u32 sbus_readl(const volatile void __iomem *addr)
76{
77	return *(__force volatile u32 *)addr;
78}
79
80static inline void sbus_writeb(u8 b, volatile void __iomem *addr)
81{
82	*(__force volatile u8 *)addr = b;
83}
84
85static inline void sbus_writew(u16 w, volatile void __iomem *addr)
86{
87	*(__force volatile u16 *)addr = w;
88}
89
90static inline void sbus_writel(u32 l, volatile void __iomem *addr)
91{
92	*(__force volatile u32 *)addr = l;
93}
94
95static inline void sbus_memset_io(volatile void __iomem *__dst, int c,
96                                  __kernel_size_t n)
97{
98	while(n--) {
99		sbus_writeb(c, __dst);
100		__dst++;
101	}
102}
103
104static inline void sbus_memcpy_fromio(void *dst,
105                                      const volatile void __iomem *src,
106                                      __kernel_size_t n)
107{
108	char *d = dst;
109
110	while (n--) {
111		char tmp = sbus_readb(src);
112		*d++ = tmp;
113		src++;
114	}
115}
116
117static inline void sbus_memcpy_toio(volatile void __iomem *dst,
118                                    const void *src,
119                                    __kernel_size_t n)
120{
121	const char *s = src;
122	volatile void __iomem *d = dst;
123
124	while (n--) {
125		char tmp = *s++;
126		sbus_writeb(tmp, d);
127		d++;
128	}
129}
130
131/* Create a virtual mapping cookie for an IO port range */
132void __iomem *ioport_map(unsigned long port, unsigned int nr);
133void ioport_unmap(void __iomem *);
134
135/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
136struct pci_dev;
137void pci_iounmap(struct pci_dev *dev, void __iomem *);
138
139static inline int sbus_can_dma_64bit(void)
140{
141	return 0; /* actually, sparc_cpu_model==sun4d */
142}
143static inline int sbus_can_burst64(void)
144{
145	return 0; /* actually, sparc_cpu_model==sun4d */
146}
147struct device;
148void sbus_set_sbus64(struct device *, int);
149
150#define __ARCH_HAS_NO_PAGE_ZERO_MAPPED		1
151
152
153#endif /* !(__SPARC_IO_H) */
154