arch/blackfin/include/asm/io.h

   1 #ifndef _BFIN_IO_H
   2 #define _BFIN_IO_H
   3
   4 #ifdef __KERNEL__
   5
   6 #ifndef __ASSEMBLY__
   7 #include <linux/types.h>
   8 #endif
   9 #include <linux/compiler.h>
  10
  11 /*
  12  * These are for ISA/PCI shared memory _only_ and should never be used
  13  * on any other type of memory, including Zorro memory. They are meant to
  14  * access the bus in the bus byte order which is little-endian!.
  15  *
  16  * readX/writeX() are used to access memory mapped devices. On some
  17  * architectures the memory mapped IO stuff needs to be accessed
  18  * differently. On the bfin architecture, we just read/write the
  19  * memory location directly.
  20  */
  21 #ifndef __ASSEMBLY__
  22
  23 static inline unsigned char readb(const volatile void __iomem *addr)
  24 {
  25         unsigned int val;
  26         int tmp;
  27
  28         __asm__ __volatile__ ("cli %1;\n\t"
  29                         "NOP; NOP; SSYNC;\n\t"
  30                         "%0 = b [%2] (z);\n\t"
  31                         "sti %1;\n\t"
  32                         : "=d"(val), "=d"(tmp): "a"(addr)
  33                         );
  34
  35         return (unsigned char) val;
  36 }
  37
  38 static inline unsigned short readw(const volatile void __iomem *addr)
  39 {
  40         unsigned int val;
  41         int tmp;
  42
  43         __asm__ __volatile__ ("cli %1;\n\t"
  44                         "NOP; NOP; SSYNC;\n\t"
  45                         "%0 = w [%2] (z);\n\t"
  46                         "sti %1;\n\t"
  47                         : "=d"(val), "=d"(tmp): "a"(addr)
  48                         );
  49
  50         return (unsigned short) val;
  51 }
  52
  53 static inline unsigned int readl(const volatile void __iomem *addr)
  54 {
  55         unsigned int val;
  56         int tmp;
  57
  58         __asm__ __volatile__ ("cli %1;\n\t"
  59                         "NOP; NOP; SSYNC;\n\t"
  60                         "%0 = [%2];\n\t"
  61                         "sti %1;\n\t"
  62                         : "=d"(val), "=d"(tmp): "a"(addr)
  63                         );
  64         return val;
  65 }
  66
  67 #endif /*  __ASSEMBLY__ */
  68
  69 #define writeb(b,addr) (void)((*(volatile unsigned char *) (addr)) = (b))
  70 #define writew(b,addr) (void)((*(volatile unsigned short *) (addr)) = (b))
  71 #define writel(b,addr) (void)((*(volatile unsigned int *) (addr)) = (b))
  72
  73 #define __raw_readb readb
  74 #define __raw_readw readw
  75 #define __raw_readl readl
  76 #define __raw_writeb writeb
  77 #define __raw_writew writew
  78 #define __raw_writel writel
  79 #define memset_io(a,b,c)        memset((void *)(a),(b),(c))
  80 #define memcpy_fromio(a,b,c)    memcpy((a),(void *)(b),(c))
  81 #define memcpy_toio(a,b,c)      memcpy((void *)(a),(b),(c))
  82
  83 /* Convert "I/O port addresses" to actual addresses.  i.e. ugly casts. */
  84 #define __io(port) ((void *)(unsigned long)(port))
  85
  86 #define inb(port)    readb(__io(port))
  87 #define inw(port)    readw(__io(port))
  88 #define inl(port)    readl(__io(port))
  89 #define outb(x,port) writeb(x,__io(port))
  90 #define outw(x,port) writew(x,__io(port))
  91 #define outl(x,port) writel(x,__io(port))
  92
  93 #define inb_p(port)    inb(__io(port))
  94 #define inw_p(port)    inw(__io(port))
  95 #define inl_p(port)    inl(__io(port))
  96 #define outb_p(x,port) outb(x,__io(port))
  97 #define outw_p(x,port) outw(x,__io(port))
  98 #define outl_p(x,port) outl(x,__io(port))
  99
 100 #define ioread8_rep(a,d,c)      readsb(a,d,c)
 101 #define ioread16_rep(a,d,c)     readsw(a,d,c)
 102 #define ioread32_rep(a,d,c)     readsl(a,d,c)
 103 #define iowrite8_rep(a,s,c)     writesb(a,s,c)
 104 #define iowrite16_rep(a,s,c)    writesw(a,s,c)
 105 #define iowrite32_rep(a,s,c)    writesl(a,s,c)
 106
 107 #define ioread8(X)                      readb(X)
 108 #define ioread16(X)                     readw(X)
 109 #define ioread32(X)                     readl(X)
 110 #define iowrite8(val,X)                 writeb(val,X)
 111 #define iowrite16(val,X)                writew(val,X)
 112 #define iowrite32(val,X)                writel(val,X)
 113
 114 #define mmiowb() wmb()
 115
 116 #define IO_SPACE_LIMIT 0xffffffff
 117
 118 /* Values for nocacheflag and cmode */
 119 #define IOMAP_NOCACHE_SER               1
 120
 121 #ifndef __ASSEMBLY__
 122
 123 extern void outsb(unsigned long port, const void *addr, unsigned long count);
 124 extern void outsw(unsigned long port, const void *addr, unsigned long count);
 125 extern void outsw_8(unsigned long port, const void *addr, unsigned long count);
 126 extern void outsl(unsigned long port, const void *addr, unsigned long count);
 127
 128 extern void insb(unsigned long port, void *addr, unsigned long count);
 129 extern void insw(unsigned long port, void *addr, unsigned long count);
 130 extern void insw_8(unsigned long port, void *addr, unsigned long count);
 131 extern void insl(unsigned long port, void *addr, unsigned long count);
 132 extern void insl_16(unsigned long port, void *addr, unsigned long count);
 133
 134 extern void dma_outsb(unsigned long port, const void *addr, unsigned short count);
 135 extern void dma_outsw(unsigned long port, const void *addr, unsigned short count);
 136 extern void dma_outsl(unsigned long port, const void *addr, unsigned short count);
 137
 138 extern void dma_insb(unsigned long port, void *addr, unsigned short count);
 139 extern void dma_insw(unsigned long port, void *addr, unsigned short count);
 140 extern void dma_insl(unsigned long port, void *addr, unsigned short count);
 141
 142 static inline void readsl(const void __iomem *addr, void *buf, int len)
 143 {
 144         insl((unsigned long)addr, buf, len);
 145 }
 146
 147 static inline void readsw(const void __iomem *addr, void *buf, int len)
 148 {
 149         insw((unsigned long)addr, buf, len);
 150 }
 151
 152 static inline void readsb(const void __iomem *addr, void *buf, int len)
 153 {
 154         insb((unsigned long)addr, buf, len);
 155 }
 156
 157 static inline void writesl(const void __iomem *addr, const void *buf, int len)
 158 {
 159         outsl((unsigned long)addr, buf, len);
 160 }
 161
 162 static inline void writesw(const void __iomem *addr, const void *buf, int len)
 163 {
 164         outsw((unsigned long)addr, buf, len);
 165 }
 166
 167 static inline void writesb(const void __iomem *addr, const void *buf, int len)
 168 {
 169         outsb((unsigned long)addr, buf, len);
 170 }
 171
 172 /*
 173  * Map some physical address range into the kernel address space.
 174  */
 175 static inline void __iomem *__ioremap(unsigned long physaddr, unsigned long size,
 176                                 int cacheflag)
 177 {
 178         return (void __iomem *)physaddr;
 179 }
 180
 181 /*
 182  * Unmap a ioremap()ed region again
 183  */
 184 static inline void iounmap(void *addr)
 185 {
 186 }
 187
 188 /*
 189  * __iounmap unmaps nearly everything, so be careful
 190  * it doesn't free currently pointer/page tables anymore but it
 191  * wans't used anyway and might be added later.
 192  */
 193 static inline void __iounmap(void *addr, unsigned long size)
 194 {
 195 }
 196
 197 /*
 198  * Set new cache mode for some kernel address space.
 199  * The caller must push data for that range itself, if such data may already
 200  * be in the cache.
 201  */
 202 static inline void kernel_set_cachemode(void *addr, unsigned long size,
 203                                         int cmode)
 204 {
 205 }
 206
 207 static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size)
 208 {
 209         return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
 210 }
 211 static inline void __iomem *ioremap_nocache(unsigned long physaddr,
 212                                             unsigned long size)
 213 {
 214         return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
 215 }
 216
 217 extern void blkfin_inv_cache_all(void);
 218
 219 #endif
 220
 221 #define ioport_map(port, nr)            ((void __iomem*)(port))
 222 #define ioport_unmap(addr)
 223
 224 /* Pages to physical address... */
 225 #define page_to_bus(page)       ((page - mem_map) << PAGE_SHIFT)
 226
 227 #define phys_to_virt(vaddr)     ((void *) (vaddr))
 228 #define virt_to_phys(vaddr)     ((unsigned long) (vaddr))
 229
 230 #define virt_to_bus virt_to_phys
 231 #define bus_to_virt phys_to_virt
 232
 233 /*
 234  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 235  * access
 236  */
 237 #define xlate_dev_mem_ptr(p)    __va(p)
 238
 239 /*
 240  * Convert a virtual cached pointer to an uncached pointer
 241  */
 242 #define xlate_dev_kmem_ptr(p)   p
 243
 244 #endif                          /* __KERNEL__ */
 245
 246 #endif                          /* _BFIN_IO_H */