tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _ASM_CRIS_IO_H
2#define _ASM_CRIS_IO_H
3
4#include <asm/page.h> /* for __va, __pa */
5#ifdef CONFIG_ETRAX_ARCH_V10
6#include <arch/io.h>
7#endif
8#include <asm-generic/iomap.h>
9#include <linux/kernel.h>
10
11struct cris_io_operations
12{
13 u32 (*read_mem)(void *addr, int size);
14 void (*write_mem)(u32 val, int size, void *addr);
15 u32 (*read_io)(u32 port, void *addr, int size, int count);
16 void (*write_io)(u32 port, void *addr, int size, int count);
17};
18
19#ifdef CONFIG_PCI
20extern struct cris_io_operations *cris_iops;
21#else
22#define cris_iops ((struct cris_io_operations*)NULL)
23#endif
24
25/*
26 * Change virtual addresses to physical addresses and vv.
27 */
28
29static inline unsigned long virt_to_phys(volatile void * address)
30{
31 return __pa(address);
32}
33
34static inline void * phys_to_virt(unsigned long address)
35{
36 return __va(address);
37}
38
39extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
40extern void __iomem * __ioremap_prot(unsigned long phys_addr, unsigned long size, pgprot_t prot);
41
42static inline void __iomem * ioremap (unsigned long offset, unsigned long size)
43{
44 return __ioremap(offset, size, 0);
45}
46
47extern void iounmap(volatile void * __iomem addr);
48
49extern void __iomem * ioremap_nocache(unsigned long offset, unsigned long size);
50
51/*
52 * IO bus memory addresses are also 1:1 with the physical address
53 */
54#define virt_to_bus virt_to_phys
55#define bus_to_virt phys_to_virt
56
57/*
58 * readX/writeX() are used to access memory mapped devices. On some
59 * architectures the memory mapped IO stuff needs to be accessed
60 * differently. On the CRIS architecture, we just read/write the
61 * memory location directly.
62 */
63#ifdef CONFIG_PCI
64#define PCI_SPACE(x) ((((unsigned)(x)) & 0x10000000) == 0x10000000)
65#else
66#define PCI_SPACE(x) 0
67#endif
68static inline unsigned char readb(const volatile void __iomem *addr)
69{
70 if (PCI_SPACE(addr) && cris_iops)
71 return cris_iops->read_mem((void*)addr, 1);
72 else
73 return *(volatile unsigned char __force *) addr;
74}
75static inline unsigned short readw(const volatile void __iomem *addr)
76{
77 if (PCI_SPACE(addr) && cris_iops)
78 return cris_iops->read_mem((void*)addr, 2);
79 else
80 return *(volatile unsigned short __force *) addr;
81}
82static inline unsigned int readl(const volatile void __iomem *addr)
83{
84 if (PCI_SPACE(addr) && cris_iops)
85 return cris_iops->read_mem((void*)addr, 4);
86 else
87 return *(volatile unsigned int __force *) addr;
88}
89#define readb_relaxed(addr) readb(addr)
90#define readw_relaxed(addr) readw(addr)
91#define readl_relaxed(addr) readl(addr)
92#define __raw_readb readb
93#define __raw_readw readw
94#define __raw_readl readl
95
96static inline void writeb(unsigned char b, volatile void __iomem *addr)
97{
98 if (PCI_SPACE(addr) && cris_iops)
99 cris_iops->write_mem(b, 1, (void*)addr);
100 else
101 *(volatile unsigned char __force *) addr = b;
102}
103static inline void writew(unsigned short b, volatile void __iomem *addr)
104{
105 if (PCI_SPACE(addr) && cris_iops)
106 cris_iops->write_mem(b, 2, (void*)addr);
107 else
108 *(volatile unsigned short __force *) addr = b;
109}
110static inline void writel(unsigned int b, volatile void __iomem *addr)
111{
112 if (PCI_SPACE(addr) && cris_iops)
113 cris_iops->write_mem(b, 4, (void*)addr);
114 else
115 *(volatile unsigned int __force *) addr = b;
116}
117#define writeb_relaxed(b, addr) writeb(b, addr)
118#define writew_relaxed(b, addr) writew(b, addr)
119#define writel_relaxed(b, addr) writel(b, addr)
120#define __raw_writeb writeb
121#define __raw_writew writew
122#define __raw_writel writel
123
124#define mmiowb()
125
126#define memset_io(a,b,c) memset((void *)(a),(b),(c))
127#define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c))
128#define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c))
129
130
131/* I/O port access. Normally there is no I/O space on CRIS but when
132 * Cardbus/PCI is enabled the request is passed through the bridge.
133 */
134
135#define IO_SPACE_LIMIT 0xffff
136#define inb(port) (cris_iops ? cris_iops->read_io(port,NULL,1,1) : 0)
137#define inw(port) (cris_iops ? cris_iops->read_io(port,NULL,2,1) : 0)
138#define inl(port) (cris_iops ? cris_iops->read_io(port,NULL,4,1) : 0)
139#define insb(port,addr,count) (cris_iops ? cris_iops->read_io(port,addr,1,count) : 0)
140#define insw(port,addr,count) (cris_iops ? cris_iops->read_io(port,addr,2,count) : 0)
141#define insl(port,addr,count) (cris_iops ? cris_iops->read_io(port,addr,4,count) : 0)
142static inline void outb(unsigned char data, unsigned int port)
143{
144 if (cris_iops)
145 cris_iops->write_io(port, (void *) &data, 1, 1);
146}
147static inline void outw(unsigned short data, unsigned int port)
148{
149 if (cris_iops)
150 cris_iops->write_io(port, (void *) &data, 2, 1);
151}
152static inline void outl(unsigned int data, unsigned int port)
153{
154 if (cris_iops)
155 cris_iops->write_io(port, (void *) &data, 4, 1);
156}
157static inline void outsb(unsigned int port, const void *addr,
158 unsigned long count)
159{
160 if (cris_iops)
161 cris_iops->write_io(port, (void *)addr, 1, count);
162}
163static inline void outsw(unsigned int port, const void *addr,
164 unsigned long count)
165{
166 if (cris_iops)
167 cris_iops->write_io(port, (void *)addr, 2, count);
168}
169static inline void outsl(unsigned int port, const void *addr,
170 unsigned long count)
171{
172 if (cris_iops)
173 cris_iops->write_io(port, (void *)addr, 4, count);
174}
175
176#define inb_p(port) inb(port)
177#define inw_p(port) inw(port)
178#define inl_p(port) inl(port)
179#define outb_p(val, port) outb((val), (port))
180#define outw_p(val, port) outw((val), (port))
181#define outl_p(val, port) outl((val), (port))
182
183/*
184 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
185 * access
186 */
187#define xlate_dev_mem_ptr(p) __va(p)
188
189/*
190 * Convert a virtual cached pointer to an uncached pointer
191 */
192#define xlate_dev_kmem_ptr(p) p
193
194#endif