tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _ASM_IO_H
2#define _ASM_IO_H
3
4#include <linux/config.h>
5#include <linux/types.h>
6#include <asm/pgtable.h>
7
8extern unsigned long parisc_vmerge_boundary;
9extern unsigned long parisc_vmerge_max_size;
10
11#define BIO_VMERGE_BOUNDARY parisc_vmerge_boundary
12#define BIO_VMERGE_MAX_SIZE parisc_vmerge_max_size
13
14#define virt_to_phys(a) ((unsigned long)__pa(a))
15#define phys_to_virt(a) __va(a)
16#define virt_to_bus virt_to_phys
17#define bus_to_virt phys_to_virt
18
19/*
20 * Memory mapped I/O
21 *
22 * readX()/writeX() do byteswapping and take an ioremapped address
23 * __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address.
24 * gsc_*() don't byteswap and operate on physical addresses;
25 * eg dev->hpa or 0xfee00000.
26 */
27
28static inline unsigned char gsc_readb(unsigned long addr)
29{
30 long flags;
31 unsigned char ret;
32
33 __asm__ __volatile__(
34 " rsm 2,%0\n"
35 " ldbx 0(%2),%1\n"
36 " mtsm %0\n"
37 : "=&r" (flags), "=r" (ret) : "r" (addr) );
38
39 return ret;
40}
41
42static inline unsigned short gsc_readw(unsigned long addr)
43{
44 long flags;
45 unsigned short ret;
46
47 __asm__ __volatile__(
48 " rsm 2,%0\n"
49 " ldhx 0(%2),%1\n"
50 " mtsm %0\n"
51 : "=&r" (flags), "=r" (ret) : "r" (addr) );
52
53 return ret;
54}
55
56static inline unsigned int gsc_readl(unsigned long addr)
57{
58 u32 ret;
59
60 __asm__ __volatile__(
61 " ldwax 0(%1),%0\n"
62 : "=r" (ret) : "r" (addr) );
63
64 return ret;
65}
66
67static inline unsigned long long gsc_readq(unsigned long addr)
68{
69 unsigned long long ret;
70
71#ifdef __LP64__
72 __asm__ __volatile__(
73 " ldda 0(%1),%0\n"
74 : "=r" (ret) : "r" (addr) );
75#else
76 /* two reads may have side effects.. */
77 ret = ((u64) gsc_readl(addr)) << 32;
78 ret |= gsc_readl(addr+4);
79#endif
80 return ret;
81}
82
83static inline void gsc_writeb(unsigned char val, unsigned long addr)
84{
85 long flags;
86 __asm__ __volatile__(
87 " rsm 2,%0\n"
88 " stbs %1,0(%2)\n"
89 " mtsm %0\n"
90 : "=&r" (flags) : "r" (val), "r" (addr) );
91}
92
93static inline void gsc_writew(unsigned short val, unsigned long addr)
94{
95 long flags;
96 __asm__ __volatile__(
97 " rsm 2,%0\n"
98 " sths %1,0(%2)\n"
99 " mtsm %0\n"
100 : "=&r" (flags) : "r" (val), "r" (addr) );
101}
102
103static inline void gsc_writel(unsigned int val, unsigned long addr)
104{
105 __asm__ __volatile__(
106 " stwas %0,0(%1)\n"
107 : : "r" (val), "r" (addr) );
108}
109
110static inline void gsc_writeq(unsigned long long val, unsigned long addr)
111{
112#ifdef __LP64__
113 __asm__ __volatile__(
114 " stda %0,0(%1)\n"
115 : : "r" (val), "r" (addr) );
116#else
117 /* two writes may have side effects.. */
118 gsc_writel(val >> 32, addr);
119 gsc_writel(val, addr+4);
120#endif
121}
122
123/*
124 * The standard PCI ioremap interfaces
125 */
126
127extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
128
129/* Most machines react poorly to I/O-space being cacheable... Instead let's
130 * define ioremap() in terms of ioremap_nocache().
131 */
132extern inline void __iomem * ioremap(unsigned long offset, unsigned long size)
133{
134 return __ioremap(offset, size, _PAGE_NO_CACHE);
135}
136#define ioremap_nocache(off, sz) ioremap((off), (sz))
137
138extern void iounmap(void __iomem *addr);
139
140static inline unsigned char __raw_readb(const volatile void __iomem *addr)
141{
142 return (*(volatile unsigned char __force *) (addr));
143}
144static inline unsigned short __raw_readw(const volatile void __iomem *addr)
145{
146 return *(volatile unsigned short __force *) addr;
147}
148static inline unsigned int __raw_readl(const volatile void __iomem *addr)
149{
150 return *(volatile unsigned int __force *) addr;
151}
152static inline unsigned long long __raw_readq(const volatile void __iomem *addr)
153{
154 return *(volatile unsigned long long __force *) addr;
155}
156
157static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr)
158{
159 *(volatile unsigned char __force *) addr = b;
160}
161static inline void __raw_writew(unsigned short b, volatile void __iomem *addr)
162{
163 *(volatile unsigned short __force *) addr = b;
164}
165static inline void __raw_writel(unsigned int b, volatile void __iomem *addr)
166{
167 *(volatile unsigned int __force *) addr = b;
168}
169static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr)
170{
171 *(volatile unsigned long long __force *) addr = b;
172}
173
174/* readb can never be const, so use __fswab instead of le*_to_cpu */
175#define readb(addr) __raw_readb(addr)
176#define readw(addr) __fswab16(__raw_readw(addr))
177#define readl(addr) __fswab32(__raw_readl(addr))
178#define readq(addr) __fswab64(__raw_readq(addr))
179#define writeb(b, addr) __raw_writeb(b, addr)
180#define writew(b, addr) __raw_writew(cpu_to_le16(b), addr)
181#define writel(b, addr) __raw_writel(cpu_to_le32(b), addr)
182#define writeq(b, addr) __raw_writeq(cpu_to_le64(b), addr)
183
184#define readb_relaxed(addr) readb(addr)
185#define readw_relaxed(addr) readw(addr)
186#define readl_relaxed(addr) readl(addr)
187#define readq_relaxed(addr) readq(addr)
188
189#define mmiowb() do { } while (0)
190
191void memset_io(volatile void __iomem *addr, unsigned char val, int count);
192void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
193void memcpy_toio(volatile void __iomem *dst, const void *src, int count);
194
195/*
196 * XXX - We don't have csum_partial_copy_fromio() yet, so we cheat here and
197 * just copy it. The net code will then do the checksum later. Presently
198 * only used by some shared memory 8390 Ethernet cards anyway.
199 */
200
201#define eth_io_copy_and_sum(skb,src,len,unused) \
202 memcpy_fromio((skb)->data,(src),(len))
203
204/* Port-space IO */
205
206#define inb_p inb
207#define inw_p inw
208#define inl_p inl
209#define outb_p outb
210#define outw_p outw
211#define outl_p outl
212
213extern unsigned char eisa_in8(unsigned short port);
214extern unsigned short eisa_in16(unsigned short port);
215extern unsigned int eisa_in32(unsigned short port);
216extern void eisa_out8(unsigned char data, unsigned short port);
217extern void eisa_out16(unsigned short data, unsigned short port);
218extern void eisa_out32(unsigned int data, unsigned short port);
219
220#if defined(CONFIG_PCI)
221extern unsigned char inb(int addr);
222extern unsigned short inw(int addr);
223extern unsigned int inl(int addr);
224
225extern void outb(unsigned char b, int addr);
226extern void outw(unsigned short b, int addr);
227extern void outl(unsigned int b, int addr);
228#elif defined(CONFIG_EISA)
229#define inb eisa_in8
230#define inw eisa_in16
231#define inl eisa_in32
232#define outb eisa_out8
233#define outw eisa_out16
234#define outl eisa_out32
235#else
236static inline char inb(unsigned long addr)
237{
238 BUG();
239 return -1;
240}
241
242static inline short inw(unsigned long addr)
243{
244 BUG();
245 return -1;
246}
247
248static inline int inl(unsigned long addr)
249{
250 BUG();
251 return -1;
252}
253
254#define outb(x, y) BUG()
255#define outw(x, y) BUG()
256#define outl(x, y) BUG()
257#endif
258
259/*
260 * String versions of in/out ops:
261 */
262extern void insb (unsigned long port, void *dst, unsigned long count);
263extern void insw (unsigned long port, void *dst, unsigned long count);
264extern void insl (unsigned long port, void *dst, unsigned long count);
265extern void outsb (unsigned long port, const void *src, unsigned long count);
266extern void outsw (unsigned long port, const void *src, unsigned long count);
267extern void outsl (unsigned long port, const void *src, unsigned long count);
268
269
270/* IO Port space is : BBiiii where BB is HBA number. */
271#define IO_SPACE_LIMIT 0x00ffffff
272
273
274#define dma_cache_inv(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while (0)
275#define dma_cache_wback(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while (0)
276#define dma_cache_wback_inv(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while (0)
277
278/* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32
279 * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit
280 * mode (essentially just sign extending. This macro takes in a 32
281 * bit I/O address (still with the leading f) and outputs the correct
282 * value for either 32 or 64 bit mode */
283#define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL)))
284
285#include <asm-generic/iomap.h>
286
287/*
288 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
289 * access
290 */
291#define xlate_dev_mem_ptr(p) __va(p)
292
293/*
294 * Convert a virtual cached pointer to an uncached pointer
295 */
296#define xlate_dev_kmem_ptr(p) p
297
298#endif