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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _ASM_IO_H
2#define _ASM_IO_H
3
Linus Torvalds1da177e2005-04-16 15:20:36 -07004#include <linux/types.h>
5#include <asm/pgtable.h>
6
7extern unsigned long parisc_vmerge_boundary;
8extern unsigned long parisc_vmerge_max_size;
9
10#define BIO_VMERGE_BOUNDARY parisc_vmerge_boundary
11#define BIO_VMERGE_MAX_SIZE parisc_vmerge_max_size
12
13#define virt_to_phys(a) ((unsigned long)__pa(a))
14#define phys_to_virt(a) __va(a)
15#define virt_to_bus virt_to_phys
16#define bus_to_virt phys_to_virt
17
18/*
19 * Memory mapped I/O
20 *
21 * readX()/writeX() do byteswapping and take an ioremapped address
22 * __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address.
23 * gsc_*() don't byteswap and operate on physical addresses;
24 * eg dev->hpa or 0xfee00000.
25 */
26
Linus Torvalds1da177e2005-04-16 15:20:36 -070027static inline unsigned char gsc_readb(unsigned long addr)
28{
29 long flags;
30 unsigned char ret;
31
Linus Torvalds1da177e2005-04-16 15:20:36 -070032 __asm__ __volatile__(
33 " rsm 2,%0\n"
34 " ldbx 0(%2),%1\n"
35 " mtsm %0\n"
36 : "=&r" (flags), "=r" (ret) : "r" (addr) );
37
38 return ret;
39}
40
41static inline unsigned short gsc_readw(unsigned long addr)
42{
43 long flags;
44 unsigned short ret;
45
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 __asm__ __volatile__(
47 " rsm 2,%0\n"
48 " ldhx 0(%2),%1\n"
49 " mtsm %0\n"
50 : "=&r" (flags), "=r" (ret) : "r" (addr) );
51
52 return ret;
53}
54
55static inline unsigned int gsc_readl(unsigned long addr)
56{
57 u32 ret;
58
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 __asm__ __volatile__(
60 " ldwax 0(%1),%0\n"
61 : "=r" (ret) : "r" (addr) );
62
63 return ret;
64}
65
66static inline unsigned long long gsc_readq(unsigned long addr)
67{
68 unsigned long long ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
Helge Deller513e7ec2007-01-28 15:09:20 +010070#ifdef CONFIG_64BIT
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 __asm__ __volatile__(
72 " ldda 0(%1),%0\n"
73 : "=r" (ret) : "r" (addr) );
74#else
75 /* two reads may have side effects.. */
76 ret = ((u64) gsc_readl(addr)) << 32;
77 ret |= gsc_readl(addr+4);
78#endif
79 return ret;
80}
81
82static inline void gsc_writeb(unsigned char val, unsigned long addr)
83{
84 long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 __asm__ __volatile__(
86 " rsm 2,%0\n"
87 " stbs %1,0(%2)\n"
88 " mtsm %0\n"
89 : "=&r" (flags) : "r" (val), "r" (addr) );
90}
91
92static inline void gsc_writew(unsigned short val, unsigned long addr)
93{
94 long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 __asm__ __volatile__(
96 " rsm 2,%0\n"
97 " sths %1,0(%2)\n"
98 " mtsm %0\n"
99 : "=&r" (flags) : "r" (val), "r" (addr) );
100}
101
102static inline void gsc_writel(unsigned int val, unsigned long addr)
103{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 __asm__ __volatile__(
105 " stwas %0,0(%1)\n"
106 : : "r" (val), "r" (addr) );
107}
108
109static inline void gsc_writeq(unsigned long long val, unsigned long addr)
110{
Helge Deller513e7ec2007-01-28 15:09:20 +0100111#ifdef CONFIG_64BIT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 __asm__ __volatile__(
113 " stda %0,0(%1)\n"
114 : : "r" (val), "r" (addr) );
115#else
116 /* two writes may have side effects.. */
117 gsc_writel(val >> 32, addr);
118 gsc_writel(val, addr+4);
119#endif
120}
121
122/*
123 * The standard PCI ioremap interfaces
124 */
125
126extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
127
Kyle McMartin1b52d7c2006-04-20 21:16:32 +0000128/* Most machines react poorly to I/O-space being cacheable... Instead let's
129 * define ioremap() in terms of ioremap_nocache().
130 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131extern inline void __iomem * ioremap(unsigned long offset, unsigned long size)
132{
Kyle McMartin1b52d7c2006-04-20 21:16:32 +0000133 return __ioremap(offset, size, _PAGE_NO_CACHE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134}
Kyle McMartin1b52d7c2006-04-20 21:16:32 +0000135#define ioremap_nocache(off, sz) ioremap((off), (sz))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
Matthew Wilcox01232e92006-09-19 16:37:01 -0600137extern void iounmap(const volatile void __iomem *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139static inline unsigned char __raw_readb(const volatile void __iomem *addr)
140{
141 return (*(volatile unsigned char __force *) (addr));
142}
143static inline unsigned short __raw_readw(const volatile void __iomem *addr)
144{
145 return *(volatile unsigned short __force *) addr;
146}
147static inline unsigned int __raw_readl(const volatile void __iomem *addr)
148{
149 return *(volatile unsigned int __force *) addr;
150}
151static inline unsigned long long __raw_readq(const volatile void __iomem *addr)
152{
153 return *(volatile unsigned long long __force *) addr;
154}
155
156static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr)
157{
158 *(volatile unsigned char __force *) addr = b;
159}
160static inline void __raw_writew(unsigned short b, volatile void __iomem *addr)
161{
162 *(volatile unsigned short __force *) addr = b;
163}
164static inline void __raw_writel(unsigned int b, volatile void __iomem *addr)
165{
166 *(volatile unsigned int __force *) addr = b;
167}
168static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr)
169{
170 *(volatile unsigned long long __force *) addr = b;
171}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172
173/* readb can never be const, so use __fswab instead of le*_to_cpu */
174#define readb(addr) __raw_readb(addr)
175#define readw(addr) __fswab16(__raw_readw(addr))
176#define readl(addr) __fswab32(__raw_readl(addr))
177#define readq(addr) __fswab64(__raw_readq(addr))
178#define writeb(b, addr) __raw_writeb(b, addr)
179#define writew(b, addr) __raw_writew(cpu_to_le16(b), addr)
180#define writel(b, addr) __raw_writel(cpu_to_le32(b), addr)
181#define writeq(b, addr) __raw_writeq(cpu_to_le64(b), addr)
182
183#define readb_relaxed(addr) readb(addr)
184#define readw_relaxed(addr) readw(addr)
185#define readl_relaxed(addr) readl(addr)
186#define readq_relaxed(addr) readq(addr)
187
188#define mmiowb() do { } while (0)
189
190void memset_io(volatile void __iomem *addr, unsigned char val, int count);
191void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
192void memcpy_toio(volatile void __iomem *dst, const void *src, int count);
193
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194/* Port-space IO */
195
196#define inb_p inb
197#define inw_p inw
198#define inl_p inl
199#define outb_p outb
200#define outw_p outw
201#define outl_p outl
202
203extern unsigned char eisa_in8(unsigned short port);
204extern unsigned short eisa_in16(unsigned short port);
205extern unsigned int eisa_in32(unsigned short port);
206extern void eisa_out8(unsigned char data, unsigned short port);
207extern void eisa_out16(unsigned short data, unsigned short port);
208extern void eisa_out32(unsigned int data, unsigned short port);
209
210#if defined(CONFIG_PCI)
211extern unsigned char inb(int addr);
212extern unsigned short inw(int addr);
213extern unsigned int inl(int addr);
214
215extern void outb(unsigned char b, int addr);
216extern void outw(unsigned short b, int addr);
217extern void outl(unsigned int b, int addr);
218#elif defined(CONFIG_EISA)
219#define inb eisa_in8
220#define inw eisa_in16
221#define inl eisa_in32
222#define outb eisa_out8
223#define outw eisa_out16
224#define outl eisa_out32
225#else
226static inline char inb(unsigned long addr)
227{
228 BUG();
229 return -1;
230}
231
232static inline short inw(unsigned long addr)
233{
234 BUG();
235 return -1;
236}
237
238static inline int inl(unsigned long addr)
239{
240 BUG();
241 return -1;
242}
243
244#define outb(x, y) BUG()
245#define outw(x, y) BUG()
246#define outl(x, y) BUG()
247#endif
248
249/*
250 * String versions of in/out ops:
251 */
252extern void insb (unsigned long port, void *dst, unsigned long count);
253extern void insw (unsigned long port, void *dst, unsigned long count);
254extern void insl (unsigned long port, void *dst, unsigned long count);
255extern void outsb (unsigned long port, const void *src, unsigned long count);
256extern void outsw (unsigned long port, const void *src, unsigned long count);
257extern void outsl (unsigned long port, const void *src, unsigned long count);
258
259
260/* IO Port space is : BBiiii where BB is HBA number. */
261#define IO_SPACE_LIMIT 0x00ffffff
262
263
264#define dma_cache_inv(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while (0)
265#define dma_cache_wback(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while (0)
266#define dma_cache_wback_inv(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while (0)
267
268/* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32
269 * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit
270 * mode (essentially just sign extending. This macro takes in a 32
271 * bit I/O address (still with the leading f) and outputs the correct
272 * value for either 32 or 64 bit mode */
273#define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL)))
274
275#include <asm-generic/iomap.h>
276
277/*
278 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
279 * access
280 */
281#define xlate_dev_mem_ptr(p) __va(p)
282
283/*
284 * Convert a virtual cached pointer to an uncached pointer
285 */
286#define xlate_dev_kmem_ptr(p) p
287
288#endif