blob: cab0b851b8b11164e8504313526603ffafaf410b [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * $Id: io.h,v 1.30 2001/12/21 01:23:21 davem Exp $
3 */
4#ifndef __SPARC_IO_H
5#define __SPARC_IO_H
6
7#include <linux/kernel.h>
8#include <linux/types.h>
9#include <linux/ioport.h> /* struct resource */
10
11#include <asm/page.h> /* IO address mapping routines need this */
12#include <asm/system.h>
13
14#define page_to_phys(page) (((page) - mem_map) << PAGE_SHIFT)
15
16static inline u32 flip_dword (u32 l)
17{
18 return ((l&0xff)<<24) | (((l>>8)&0xff)<<16) | (((l>>16)&0xff)<<8)| ((l>>24)&0xff);
19}
20
21static inline u16 flip_word (u16 w)
22{
23 return ((w&0xff) << 8) | ((w>>8)&0xff);
24}
25
26#define mmiowb()
27
28/*
29 * Memory mapped I/O to PCI
30 */
31
32static inline u8 __raw_readb(const volatile void __iomem *addr)
33{
34 return *(__force volatile u8 *)addr;
35}
36
37static inline u16 __raw_readw(const volatile void __iomem *addr)
38{
39 return *(__force volatile u16 *)addr;
40}
41
42static inline u32 __raw_readl(const volatile void __iomem *addr)
43{
44 return *(__force volatile u32 *)addr;
45}
46
47static inline void __raw_writeb(u8 b, volatile void __iomem *addr)
48{
49 *(__force volatile u8 *)addr = b;
50}
51
52static inline void __raw_writew(u16 w, volatile void __iomem *addr)
53{
54 *(__force volatile u16 *)addr = w;
55}
56
57static inline void __raw_writel(u32 l, volatile void __iomem *addr)
58{
59 *(__force volatile u32 *)addr = l;
60}
61
62static inline u8 __readb(const volatile void __iomem *addr)
63{
64 return *(__force volatile u8 *)addr;
65}
66
67static inline u16 __readw(const volatile void __iomem *addr)
68{
69 return flip_word(*(__force volatile u16 *)addr);
70}
71
72static inline u32 __readl(const volatile void __iomem *addr)
73{
74 return flip_dword(*(__force volatile u32 *)addr);
75}
76
77static inline void __writeb(u8 b, volatile void __iomem *addr)
78{
79 *(__force volatile u8 *)addr = b;
80}
81
82static inline void __writew(u16 w, volatile void __iomem *addr)
83{
84 *(__force volatile u16 *)addr = flip_word(w);
85}
86
87static inline void __writel(u32 l, volatile void __iomem *addr)
88{
89 *(__force volatile u32 *)addr = flip_dword(l);
90}
91
92#define readb(__addr) __readb(__addr)
93#define readw(__addr) __readw(__addr)
94#define readl(__addr) __readl(__addr)
95#define readb_relaxed(__addr) readb(__addr)
96#define readw_relaxed(__addr) readw(__addr)
97#define readl_relaxed(__addr) readl(__addr)
98
99#define writeb(__b, __addr) __writeb((__b),(__addr))
100#define writew(__w, __addr) __writew((__w),(__addr))
101#define writel(__l, __addr) __writel((__l),(__addr))
102
103/*
104 * I/O space operations
105 *
106 * Arrangement on a Sun is somewhat complicated.
107 *
108 * First of all, we want to use standard Linux drivers
109 * for keyboard, PC serial, etc. These drivers think
110 * they access I/O space and use inb/outb.
111 * On the other hand, EBus bridge accepts PCI *memory*
112 * cycles and converts them into ISA *I/O* cycles.
113 * Ergo, we want inb & outb to generate PCI memory cycles.
114 *
115 * If we want to issue PCI *I/O* cycles, we do this
116 * with a low 64K fixed window in PCIC. This window gets
117 * mapped somewhere into virtual kernel space and we
118 * can use inb/outb again.
119 */
120#define inb_local(__addr) __readb((void __iomem *)(unsigned long)(__addr))
121#define inb(__addr) __readb((void __iomem *)(unsigned long)(__addr))
122#define inw(__addr) __readw((void __iomem *)(unsigned long)(__addr))
123#define inl(__addr) __readl((void __iomem *)(unsigned long)(__addr))
124
125#define outb_local(__b, __addr) __writeb(__b, (void __iomem *)(unsigned long)(__addr))
126#define outb(__b, __addr) __writeb(__b, (void __iomem *)(unsigned long)(__addr))
127#define outw(__w, __addr) __writew(__w, (void __iomem *)(unsigned long)(__addr))
128#define outl(__l, __addr) __writel(__l, (void __iomem *)(unsigned long)(__addr))
129
130#define inb_p(__addr) inb(__addr)
131#define outb_p(__b, __addr) outb(__b, __addr)
132#define inw_p(__addr) inw(__addr)
133#define outw_p(__w, __addr) outw(__w, __addr)
134#define inl_p(__addr) inl(__addr)
135#define outl_p(__l, __addr) outl(__l, __addr)
136
137void outsb(unsigned long addr, const void *src, unsigned long cnt);
138void outsw(unsigned long addr, const void *src, unsigned long cnt);
139void outsl(unsigned long addr, const void *src, unsigned long cnt);
140void insb(unsigned long addr, void *dst, unsigned long count);
141void insw(unsigned long addr, void *dst, unsigned long count);
142void insl(unsigned long addr, void *dst, unsigned long count);
143
144#define IO_SPACE_LIMIT 0xffffffff
145
146/*
147 * SBus accessors.
148 *
149 * SBus has only one, memory mapped, I/O space.
150 * We do not need to flip bytes for SBus of course.
151 */
152static inline u8 _sbus_readb(const volatile void __iomem *addr)
153{
154 return *(__force volatile u8 *)addr;
155}
156
157static inline u16 _sbus_readw(const volatile void __iomem *addr)
158{
159 return *(__force volatile u16 *)addr;
160}
161
162static inline u32 _sbus_readl(const volatile void __iomem *addr)
163{
164 return *(__force volatile u32 *)addr;
165}
166
167static inline void _sbus_writeb(u8 b, volatile void __iomem *addr)
168{
169 *(__force volatile u8 *)addr = b;
170}
171
172static inline void _sbus_writew(u16 w, volatile void __iomem *addr)
173{
174 *(__force volatile u16 *)addr = w;
175}
176
177static inline void _sbus_writel(u32 l, volatile void __iomem *addr)
178{
179 *(__force volatile u32 *)addr = l;
180}
181
182/*
183 * The only reason for #define's is to hide casts to unsigned long.
184 */
185#define sbus_readb(__addr) _sbus_readb(__addr)
186#define sbus_readw(__addr) _sbus_readw(__addr)
187#define sbus_readl(__addr) _sbus_readl(__addr)
188#define sbus_writeb(__b, __addr) _sbus_writeb(__b, __addr)
189#define sbus_writew(__w, __addr) _sbus_writew(__w, __addr)
190#define sbus_writel(__l, __addr) _sbus_writel(__l, __addr)
191
192static inline void sbus_memset_io(volatile void __iomem *__dst, int c, __kernel_size_t n)
193{
194 while(n--) {
195 sbus_writeb(c, __dst);
196 __dst++;
197 }
198}
199
200static inline void
201_memset_io(volatile void __iomem *dst, int c, __kernel_size_t n)
202{
203 volatile void __iomem *d = dst;
204
205 while (n--) {
206 writeb(c, d);
207 d++;
208 }
209}
210
211#define memset_io(d,c,sz) _memset_io(d,c,sz)
212
213static inline void
214_memcpy_fromio(void *dst, const volatile void __iomem *src, __kernel_size_t n)
215{
216 char *d = dst;
217
218 while (n--) {
219 char tmp = readb(src);
220 *d++ = tmp;
221 src++;
222 }
223}
224
225#define memcpy_fromio(d,s,sz) _memcpy_fromio(d,s,sz)
226
227static inline void
228_memcpy_toio(volatile void __iomem *dst, const void *src, __kernel_size_t n)
229{
230 const char *s = src;
231 volatile void __iomem *d = dst;
232
233 while (n--) {
234 char tmp = *s++;
235 writeb(tmp, d);
236 d++;
237 }
238}
239
240#define memcpy_toio(d,s,sz) _memcpy_toio(d,s,sz)
241
242#ifdef __KERNEL__
243
244/*
245 * Bus number may be embedded in the higher bits of the physical address.
246 * This is why we have no bus number argument to ioremap().
247 */
248extern void __iomem *ioremap(unsigned long offset, unsigned long size);
249#define ioremap_nocache(X,Y) ioremap((X),(Y))
250extern void iounmap(volatile void __iomem *addr);
251
David S. Miller749805d2006-06-25 23:24:24 -0700252#define ioread8(X) readb(X)
253#define ioread16(X) readw(X)
254#define ioread32(X) readl(X)
255#define iowrite8(val,X) writeb(val,X)
256#define iowrite16(val,X) writew(val,X)
257#define iowrite32(val,X) writel(val,X)
258
259/* Create a virtual mapping cookie for an IO port range */
260extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
261extern void ioport_unmap(void __iomem *);
262
263/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
264struct pci_dev;
265extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
266extern void pci_iounmap(struct pci_dev *dev, void __iomem *);
267
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268/*
269 * Bus number may be in res->flags... somewhere.
270 */
271extern void __iomem *sbus_ioremap(struct resource *res, unsigned long offset,
272 unsigned long size, char *name);
273extern void sbus_iounmap(volatile void __iomem *vaddr, unsigned long size);
274
275
276/*
277 * At the moment, we do not use CMOS_READ anywhere outside of rtc.c,
278 * so rtc_port is static in it. This should not change unless a new
279 * hardware pops up.
280 */
281#define RTC_PORT(x) (rtc_port + (x))
282#define RTC_ALWAYS_BCD 0
283
284/* Nothing to do */
285/* P3: Only IDE DMA may need these. XXX Verify that it still does... */
286
287#define dma_cache_inv(_start,_size) do { } while (0)
288#define dma_cache_wback(_start,_size) do { } while (0)
289#define dma_cache_wback_inv(_start,_size) do { } while (0)
290
291#endif
292
293#define __ARCH_HAS_NO_PAGE_ZERO_MAPPED 1
294
295/*
296 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
297 * access
298 */
299#define xlate_dev_mem_ptr(p) __va(p)
300
301/*
302 * Convert a virtual cached pointer to an uncached pointer
303 */
304#define xlate_dev_kmem_ptr(p) p
305
306#endif /* !(__SPARC_IO_H) */