tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef __SPARC_IO_H
2#define __SPARC_IO_H
3
4#include <linux/kernel.h>
5#include <linux/ioport.h> /* struct resource */
6
7#define IO_SPACE_LIMIT 0xffffffff
8
9#define memset_io(d,c,sz) _memset_io(d,c,sz)
10#define memcpy_fromio(d,s,sz) _memcpy_fromio(d,s,sz)
11#define memcpy_toio(d,s,sz) _memcpy_toio(d,s,sz)
12
13#include <asm-generic/io.h>
14
15static inline void _memset_io(volatile void __iomem *dst,
16 int c, __kernel_size_t n)
17{
18 volatile void __iomem *d = dst;
19
20 while (n--) {
21 writeb(c, d);
22 d++;
23 }
24}
25
26static inline void _memcpy_fromio(void *dst, const volatile void __iomem *src,
27 __kernel_size_t n)
28{
29 char *d = dst;
30
31 while (n--) {
32 char tmp = readb(src);
33 *d++ = tmp;
34 src++;
35 }
36}
37
38static inline void _memcpy_toio(volatile void __iomem *dst, const void *src,
39 __kernel_size_t n)
40{
41 const char *s = src;
42 volatile void __iomem *d = dst;
43
44 while (n--) {
45 char tmp = *s++;
46 writeb(tmp, d);
47 d++;
48 }
49}
50
51/*
52 * SBus accessors.
53 *
54 * SBus has only one, memory mapped, I/O space.
55 * We do not need to flip bytes for SBus of course.
56 */
57static inline u8 sbus_readb(const volatile void __iomem *addr)
58{
59 return *(__force volatile u8 *)addr;
60}
61
62static inline u16 sbus_readw(const volatile void __iomem *addr)
63{
64 return *(__force volatile u16 *)addr;
65}
66
67static inline u32 sbus_readl(const volatile void __iomem *addr)
68{
69 return *(__force volatile u32 *)addr;
70}
71
72static inline void sbus_writeb(u8 b, volatile void __iomem *addr)
73{
74 *(__force volatile u8 *)addr = b;
75}
76
77static inline void sbus_writew(u16 w, volatile void __iomem *addr)
78{
79 *(__force volatile u16 *)addr = w;
80}
81
82static inline void sbus_writel(u32 l, volatile void __iomem *addr)
83{
84 *(__force volatile u32 *)addr = l;
85}
86
87static inline void sbus_memset_io(volatile void __iomem *__dst, int c,
88 __kernel_size_t n)
89{
90 while(n--) {
91 sbus_writeb(c, __dst);
92 __dst++;
93 }
94}
95
96static inline void sbus_memcpy_fromio(void *dst,
97 const volatile void __iomem *src,
98 __kernel_size_t n)
99{
100 char *d = dst;
101
102 while (n--) {
103 char tmp = sbus_readb(src);
104 *d++ = tmp;
105 src++;
106 }
107}
108
109static inline void sbus_memcpy_toio(volatile void __iomem *dst,
110 const void *src,
111 __kernel_size_t n)
112{
113 const char *s = src;
114 volatile void __iomem *d = dst;
115
116 while (n--) {
117 char tmp = *s++;
118 sbus_writeb(tmp, d);
119 d++;
120 }
121}
122
123#ifdef __KERNEL__
124
125/*
126 * Bus number may be embedded in the higher bits of the physical address.
127 * This is why we have no bus number argument to ioremap().
128 */
129void __iomem *ioremap(unsigned long offset, unsigned long size);
130#define ioremap_nocache(X,Y) ioremap((X),(Y))
131#define ioremap_wc(X,Y) ioremap((X),(Y))
132void iounmap(volatile void __iomem *addr);
133
134/* Create a virtual mapping cookie for an IO port range */
135void __iomem *ioport_map(unsigned long port, unsigned int nr);
136void ioport_unmap(void __iomem *);
137
138/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
139struct pci_dev;
140void pci_iounmap(struct pci_dev *dev, void __iomem *);
141
142
143
144/*
145 * At the moment, we do not use CMOS_READ anywhere outside of rtc.c,
146 * so rtc_port is static in it. This should not change unless a new
147 * hardware pops up.
148 */
149#define RTC_PORT(x) (rtc_port + (x))
150#define RTC_ALWAYS_BCD 0
151
152static inline int sbus_can_dma_64bit(void)
153{
154 return 0; /* actually, sparc_cpu_model==sun4d */
155}
156static inline int sbus_can_burst64(void)
157{
158 return 0; /* actually, sparc_cpu_model==sun4d */
159}
160struct device;
161void sbus_set_sbus64(struct device *, int);
162
163#endif
164
165#define __ARCH_HAS_NO_PAGE_ZERO_MAPPED 1
166
167
168#endif /* !(__SPARC_IO_H) */