OMAP3: PM: Fix linker error without CONFIG_PM option
[linux-ginger.git] / arch / xtensa / include / asm / io.h
blobd04cd3a625fa54906eda4e4339855c19aaecc5f5
1 /*
2 * include/asm-xtensa/io.h
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
6 * for more details.
8 * Copyright (C) 2001 - 2005 Tensilica Inc.
9 */
11 #ifndef _XTENSA_IO_H
12 #define _XTENSA_IO_H
14 #ifdef __KERNEL__
15 #include <asm/byteorder.h>
16 #include <asm/page.h>
17 #include <linux/kernel.h>
19 #include <linux/types.h>
21 #define XCHAL_KIO_CACHED_VADDR 0xe0000000
22 #define XCHAL_KIO_BYPASS_VADDR 0xf0000000
23 #define XCHAL_KIO_PADDR 0xf0000000
24 #define XCHAL_KIO_SIZE 0x10000000
26 #define IOADDR(x) (XCHAL_KIO_BYPASS_VADDR + (x))
29 * swap functions to change byte order from little-endian to big-endian and
30 * vice versa.
33 static inline unsigned short _swapw (unsigned short v)
35 return (v << 8) | (v >> 8);
38 static inline unsigned int _swapl (unsigned int v)
40 return (v << 24) | ((v & 0xff00) << 8) | ((v >> 8) & 0xff00) | (v >> 24);
44 * Change virtual addresses to physical addresses and vv.
45 * These are trivial on the 1:1 Linux/Xtensa mapping
48 static inline unsigned long virt_to_phys(volatile void * address)
50 return __pa(address);
53 static inline void * phys_to_virt(unsigned long address)
55 return __va(address);
59 * virt_to_bus and bus_to_virt are deprecated.
62 #define virt_to_bus(x) virt_to_phys(x)
63 #define bus_to_virt(x) phys_to_virt(x)
66 * Return the virtual (cached) address for the specified bus memory.
67 * Note that we currently don't support any address outside the KIO segment.
70 static inline void *ioremap(unsigned long offset, unsigned long size)
72 #ifdef CONFIG_MMU
73 if (offset >= XCHAL_KIO_PADDR
74 && offset < XCHAL_KIO_PADDR + XCHAL_KIO_SIZE)
75 return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_BYPASS_VADDR);
76 else
77 BUG();
78 #else
79 return (void *)offset;
80 #endif
83 static inline void *ioremap_nocache(unsigned long offset, unsigned long size)
85 #ifdef CONFIG_MMU
86 if (offset >= XCHAL_KIO_PADDR
87 && offset < XCHAL_KIO_PADDR + XCHAL_KIO_SIZE)
88 return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_CACHED_VADDR);
89 else
90 BUG();
91 #else
92 return (void *)offset;
93 #endif
96 static inline void iounmap(void *addr)
101 * Generic I/O
104 #define readb(addr) \
105 ({ unsigned char __v = (*(volatile unsigned char *)(addr)); __v; })
106 #define readw(addr) \
107 ({ unsigned short __v = (*(volatile unsigned short *)(addr)); __v; })
108 #define readl(addr) \
109 ({ unsigned int __v = (*(volatile unsigned int *)(addr)); __v; })
110 #define writeb(b, addr) (void)((*(volatile unsigned char *)(addr)) = (b))
111 #define writew(b, addr) (void)((*(volatile unsigned short *)(addr)) = (b))
112 #define writel(b, addr) (void)((*(volatile unsigned int *)(addr)) = (b))
114 static inline __u8 __raw_readb(const volatile void __iomem *addr)
116 return *(__force volatile __u8 *)(addr);
118 static inline __u16 __raw_readw(const volatile void __iomem *addr)
120 return *(__force volatile __u16 *)(addr);
122 static inline __u32 __raw_readl(const volatile void __iomem *addr)
124 return *(__force volatile __u32 *)(addr);
126 static inline void __raw_writeb(__u8 b, volatile void __iomem *addr)
128 *(__force volatile __u8 *)(addr) = b;
130 static inline void __raw_writew(__u16 b, volatile void __iomem *addr)
132 *(__force volatile __u16 *)(addr) = b;
134 static inline void __raw_writel(__u32 b, volatile void __iomem *addr)
136 *(__force volatile __u32 *)(addr) = b;
139 /* These are the definitions for the x86 IO instructions
140 * inb/inw/inl/outb/outw/outl, the "string" versions
141 * insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions
142 * inb_p/inw_p/...
143 * The macros don't do byte-swapping.
146 #define inb(port) readb((u8 *)((port)))
147 #define outb(val, port) writeb((val),(u8 *)((unsigned long)(port)))
148 #define inw(port) readw((u16 *)((port)))
149 #define outw(val, port) writew((val),(u16 *)((unsigned long)(port)))
150 #define inl(port) readl((u32 *)((port)))
151 #define outl(val, port) writel((val),(u32 *)((unsigned long)(port)))
153 #define inb_p(port) inb((port))
154 #define outb_p(val, port) outb((val), (port))
155 #define inw_p(port) inw((port))
156 #define outw_p(val, port) outw((val), (port))
157 #define inl_p(port) inl((port))
158 #define outl_p(val, port) outl((val), (port))
160 extern void insb (unsigned long port, void *dst, unsigned long count);
161 extern void insw (unsigned long port, void *dst, unsigned long count);
162 extern void insl (unsigned long port, void *dst, unsigned long count);
163 extern void outsb (unsigned long port, const void *src, unsigned long count);
164 extern void outsw (unsigned long port, const void *src, unsigned long count);
165 extern void outsl (unsigned long port, const void *src, unsigned long count);
167 #define IO_SPACE_LIMIT ~0
169 #define memset_io(a,b,c) memset((void *)(a),(b),(c))
170 #define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c))
171 #define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c))
173 /* At this point the Xtensa doesn't provide byte swap instructions */
175 #ifdef __XTENSA_EB__
176 # define in_8(addr) (*(u8*)(addr))
177 # define in_le16(addr) _swapw(*(u16*)(addr))
178 # define in_le32(addr) _swapl(*(u32*)(addr))
179 # define out_8(b, addr) *(u8*)(addr) = (b)
180 # define out_le16(b, addr) *(u16*)(addr) = _swapw(b)
181 # define out_le32(b, addr) *(u32*)(addr) = _swapl(b)
182 #elif defined(__XTENSA_EL__)
183 # define in_8(addr) (*(u8*)(addr))
184 # define in_le16(addr) (*(u16*)(addr))
185 # define in_le32(addr) (*(u32*)(addr))
186 # define out_8(b, addr) *(u8*)(addr) = (b)
187 # define out_le16(b, addr) *(u16*)(addr) = (b)
188 # define out_le32(b, addr) *(u32*)(addr) = (b)
189 #else
190 # error processor byte order undefined!
191 #endif
195 * Convert a physical pointer to a virtual kernel pointer for /dev/mem access
197 #define xlate_dev_mem_ptr(p) __va(p)
200 * Convert a virtual cached pointer to an uncached pointer
202 #define xlate_dev_kmem_ptr(p) p
205 #endif /* __KERNEL__ */
207 #endif /* _XTENSA_IO_H */