arch/cris/include/asm/io.h

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