include/asm-blackfin/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 #define inb(addr)    readb(addr)
  84 #define inw(addr)    readw(addr)
  85 #define inl(addr)    readl(addr)
  86 #define outb(x,addr) ((void) writeb(x,addr))
  87 #define outw(x,addr) ((void) writew(x,addr))
  88 #define outl(x,addr) ((void) writel(x,addr))
  89
  90 #define inb_p(addr)    inb(addr)
  91 #define inw_p(addr)    inw(addr)
  92 #define inl_p(addr)    inl(addr)
  93 #define outb_p(x,addr) outb(x,addr)
  94 #define outw_p(x,addr) outw(x,addr)
  95 #define outl_p(x,addr) outl(x,addr)
  96
  97 #define ioread8_rep(a,d,c)      insb(a,d,c)
  98 #define ioread16_rep(a,d,c)     insw(a,d,c)
  99 #define ioread32_rep(a,d,c)     insl(a,d,c)
 100 #define iowrite8_rep(a,s,c)     outsb(a,s,c)
 101 #define iowrite16_rep(a,s,c)    outsw(a,s,c)
 102 #define iowrite32_rep(a,s,c)    outsl(a,s,c)
 103
 104 #define ioread8(X)                      readb(X)
 105 #define ioread16(X)                     readw(X)
 106 #define ioread32(X)                     readl(X)
 107 #define iowrite8(val,X)                 writeb(val,X)
 108 #define iowrite16(val,X)                writew(val,X)
 109 #define iowrite32(val,X)                writel(val,X)
 110
 111 #define IO_SPACE_LIMIT 0xffffffff
 112
 113 /* Values for nocacheflag and cmode */
 114 #define IOMAP_NOCACHE_SER               1
 115
 116 #ifndef __ASSEMBLY__
 117
 118 extern void outsb(unsigned long port, const void *addr, unsigned long count);
 119 extern void outsw(unsigned long port, const void *addr, unsigned long count);
 120 extern void outsl(unsigned long port, const void *addr, unsigned long count);
 121
 122 extern void insb(unsigned long port, void *addr, unsigned long count);
 123 extern void insw(unsigned long port, void *addr, unsigned long count);
 124 extern void insl(unsigned long port, void *addr, unsigned long count);
 125
 126 extern void dma_outsb(unsigned long port, const void *addr, unsigned short count);
 127 extern void dma_outsw(unsigned long port, const void *addr, unsigned short count);
 128 extern void dma_outsl(unsigned long port, const void *addr, unsigned short count);
 129
 130 extern void dma_insb(unsigned long port, void *addr, unsigned short count);
 131 extern void dma_insw(unsigned long port, void *addr, unsigned short count);
 132 extern void dma_insl(unsigned long port, void *addr, unsigned short count);
 133
 134 /*
 135  * Map some physical address range into the kernel address space.
 136  */
 137 static inline void __iomem *__ioremap(unsigned long physaddr, unsigned long size,
 138                                 int cacheflag)
 139 {
 140         return (void __iomem *)physaddr;
 141 }
 142
 143 /*
 144  * Unmap a ioremap()ed region again
 145  */
 146 static inline void iounmap(void *addr)
 147 {
 148 }
 149
 150 /*
 151  * __iounmap unmaps nearly everything, so be careful
 152  * it doesn't free currently pointer/page tables anymore but it
 153  * wans't used anyway and might be added later.
 154  */
 155 static inline void __iounmap(void *addr, unsigned long size)
 156 {
 157 }
 158
 159 /*
 160  * Set new cache mode for some kernel address space.
 161  * The caller must push data for that range itself, if such data may already
 162  * be in the cache.
 163  */
 164 static inline void kernel_set_cachemode(void *addr, unsigned long size,
 165                                         int cmode)
 166 {
 167 }
 168
 169 static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size)
 170 {
 171         return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
 172 }
 173 static inline void __iomem *ioremap_nocache(unsigned long physaddr,
 174                                             unsigned long size)
 175 {
 176         return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
 177 }
 178
 179 extern void blkfin_inv_cache_all(void);
 180
 181 #endif
 182
 183 #define ioport_map(port, nr)            ((void __iomem*)(port))
 184 #define ioport_unmap(addr)
 185
 186 #define dma_cache_inv(_start,_size) do { blkfin_inv_cache_all();} while (0)
 187 #define dma_cache_wback(_start,_size) do { } while (0)
 188 #define dma_cache_wback_inv(_start,_size) do { blkfin_inv_cache_all();} while (0)
 189
 190 /* Pages to physical address... */
 191 #define page_to_phys(page)      ((page - mem_map) << PAGE_SHIFT)
 192 #define page_to_bus(page)       ((page - mem_map) << PAGE_SHIFT)
 193
 194 #define mm_ptov(vaddr)          ((void *) (vaddr))
 195 #define mm_vtop(vaddr)          ((unsigned long) (vaddr))
 196 #define phys_to_virt(vaddr)     ((void *) (vaddr))
 197 #define virt_to_phys(vaddr)     ((unsigned long) (vaddr))
 198
 199 #define virt_to_bus virt_to_phys
 200 #define bus_to_virt phys_to_virt
 201
 202 /*
 203  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 204  * access
 205  */
 206 #define xlate_dev_mem_ptr(p)    __va(p)
 207
 208 /*
 209  * Convert a virtual cached pointer to an uncached pointer
 210  */
 211 #define xlate_dev_kmem_ptr(p)   p
 212
 213 #endif                          /* __KERNEL__ */
 214
 215 #endif                          /* _BFIN_IO_H */