blob: c1963ce19dd26df0fa7fd3977a0f6592e769dae6 [file] [log] [blame]
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
70#ifdef __LP64__
71 __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{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111#ifdef __LP64__
112 __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/*
195 * XXX - We don't have csum_partial_copy_fromio() yet, so we cheat here and
196 * just copy it. The net code will then do the checksum later. Presently
197 * only used by some shared memory 8390 Ethernet cards anyway.
198 */
199
200#define eth_io_copy_and_sum(skb,src,len,unused) \
201 memcpy_fromio((skb)->data,(src),(len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
203/* Port-space IO */
204
205#define inb_p inb
206#define inw_p inw
207#define inl_p inl
208#define outb_p outb
209#define outw_p outw
210#define outl_p outl
211
212extern unsigned char eisa_in8(unsigned short port);
213extern unsigned short eisa_in16(unsigned short port);
214extern unsigned int eisa_in32(unsigned short port);
215extern void eisa_out8(unsigned char data, unsigned short port);
216extern void eisa_out16(unsigned short data, unsigned short port);
217extern void eisa_out32(unsigned int data, unsigned short port);
218
219#if defined(CONFIG_PCI)
220extern unsigned char inb(int addr);
221extern unsigned short inw(int addr);
222extern unsigned int inl(int addr);
223
224extern void outb(unsigned char b, int addr);
225extern void outw(unsigned short b, int addr);
226extern void outl(unsigned int b, int addr);
227#elif defined(CONFIG_EISA)
228#define inb eisa_in8
229#define inw eisa_in16
230#define inl eisa_in32
231#define outb eisa_out8
232#define outw eisa_out16
233#define outl eisa_out32
234#else
235static inline char inb(unsigned long addr)
236{
237 BUG();
238 return -1;
239}
240
241static inline short inw(unsigned long addr)
242{
243 BUG();
244 return -1;
245}
246
247static inline int inl(unsigned long addr)
248{
249 BUG();
250 return -1;
251}
252
253#define outb(x, y) BUG()
254#define outw(x, y) BUG()
255#define outl(x, y) BUG()
256#endif
257
258/*
259 * String versions of in/out ops:
260 */
261extern void insb (unsigned long port, void *dst, unsigned long count);
262extern void insw (unsigned long port, void *dst, unsigned long count);
263extern void insl (unsigned long port, void *dst, unsigned long count);
264extern void outsb (unsigned long port, const void *src, unsigned long count);
265extern void outsw (unsigned long port, const void *src, unsigned long count);
266extern void outsl (unsigned long port, const void *src, unsigned long count);
267
268
269/* IO Port space is : BBiiii where BB is HBA number. */
270#define IO_SPACE_LIMIT 0x00ffffff
271
272
273#define dma_cache_inv(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while (0)
274#define dma_cache_wback(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while (0)
275#define dma_cache_wback_inv(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while (0)
276
277/* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32
278 * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit
279 * mode (essentially just sign extending. This macro takes in a 32
280 * bit I/O address (still with the leading f) and outputs the correct
281 * value for either 32 or 64 bit mode */
282#define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL)))
283
284#include <asm-generic/iomap.h>
285
286/*
287 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
288 * access
289 */
290#define xlate_dev_mem_ptr(p) __va(p)
291
292/*
293 * Convert a virtual cached pointer to an uncached pointer
294 */
295#define xlate_dev_kmem_ptr(p) p
296
297#endif