arch/nios2/include/asm/io.h

   1 /*
   2  * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
   3  * Scott McNutt <smcnutt@psyent.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #ifndef __ASM_NIOS2_IO_H_
   9 #define __ASM_NIOS2_IO_H_
  10
  11 static inline void sync(void)
  12 {
  13         __asm__ __volatile__ ("sync" : : : "memory");
  14 }
  15
  16 /*
  17  * Given a physical address and a length, return a virtual address
  18  * that can be used to access the memory range with the caching
  19  * properties specified by "flags".
  20  */
  21 #define MAP_NOCACHE     1
  22 #define MAP_WRCOMBINE   0
  23 #define MAP_WRBACK      0
  24 #define MAP_WRTHROUGH   0
  25
  26 static inline void *
  27 map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
  28 {
  29         DECLARE_GLOBAL_DATA_PTR;
  30         if (flags)
  31                 return (void *)(paddr | gd->arch.io_region_base);
  32         else
  33                 return (void *)(paddr | gd->arch.mem_region_base);
  34 }
  35
  36 /*
  37  * Take down a mapping set up by map_physmem().
  38  */
  39 static inline void unmap_physmem(void *vaddr, unsigned long flags)
  40 {
  41
  42 }
  43
  44 static inline phys_addr_t virt_to_phys(void * vaddr)
  45 {
  46         DECLARE_GLOBAL_DATA_PTR;
  47         return (phys_addr_t)vaddr & gd->arch.physaddr_mask;
  48 }
  49
  50 #define __raw_writeb(v,a)       (*(volatile unsigned char  *)(a) = (v))
  51 #define __raw_writew(v,a)       (*(volatile unsigned short *)(a) = (v))
  52 #define __raw_writel(v,a)       (*(volatile unsigned int   *)(a) = (v))
  53
  54 #define __raw_readb(a)          (*(volatile unsigned char  *)(a))
  55 #define __raw_readw(a)          (*(volatile unsigned short *)(a))
  56 #define __raw_readl(a)          (*(volatile unsigned int   *)(a))
  57
  58 #define readb(addr)\
  59         ({unsigned char val;\
  60          asm volatile( "ldbio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;})
  61 #define readw(addr)\
  62         ({unsigned short val;\
  63          asm volatile( "ldhio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;})
  64 #define readl(addr)\
  65         ({unsigned long val;\
  66          asm volatile( "ldwio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;})
  67
  68 #define writeb(val,addr)\
  69         asm volatile ("stbio %0, 0(%1)" : : "r" (val), "r" (addr))
  70 #define writew(val,addr)\
  71         asm volatile ("sthio %0, 0(%1)" : : "r" (val), "r" (addr))
  72 #define writel(val,addr)\
  73         asm volatile ("stwio %0, 0(%1)" : : "r" (val), "r" (addr))
  74
  75 #define inb(addr)       readb(addr)
  76 #define inw(addr)       readw(addr)
  77 #define inl(addr)       readl(addr)
  78 #define outb(val, addr) writeb(val,addr)
  79 #define outw(val, addr) writew(val,addr)
  80 #define outl(val, addr) writel(val,addr)
  81
  82 static inline void insb (unsigned long port, void *dst, unsigned long count)
  83 {
  84         unsigned char *p = dst;
  85         while (count--) *p++ = inb (port);
  86 }
  87 static inline void insw (unsigned long port, void *dst, unsigned long count)
  88 {
  89         unsigned short *p = dst;
  90         while (count--) *p++ = inw (port);
  91 }
  92 static inline void insl (unsigned long port, void *dst, unsigned long count)
  93 {
  94         unsigned long *p = dst;
  95         while (count--) *p++ = inl (port);
  96 }
  97
  98 static inline void outsb (unsigned long port, const void *src, unsigned long count)
  99 {
 100         const unsigned char *p = src;
 101         while (count--) outb (*p++, port);
 102 }
 103
 104 static inline void outsw (unsigned long port, const void *src, unsigned long count)
 105 {
 106         const unsigned short *p = src;
 107         while (count--) outw (*p++, port);
 108 }
 109 static inline void outsl (unsigned long port, const void *src, unsigned long count)
 110 {
 111         const unsigned long *p = src;
 112         while (count--) outl (*p++, port);
 113 }
 114
 115 /*
 116  * Clear and set bits in one shot. These macros can be used to clear and
 117  * set multiple bits in a register using a single call. These macros can
 118  * also be used to set a multiple-bit bit pattern using a mask, by
 119  * specifying the mask in the 'clear' parameter and the new bit pattern
 120  * in the 'set' parameter.
 121  */
 122
 123 #define out_arch(type,endian,a,v)       __raw_write##type(cpu_to_##endian(v),a)
 124 #define in_arch(type,endian,a)          endian##_to_cpu(__raw_read##type(a))
 125
 126 #define out_le32(a,v)   out_arch(l,le32,a,v)
 127 #define out_le16(a,v)   out_arch(w,le16,a,v)
 128
 129 #define in_le32(a)      in_arch(l,le32,a)
 130 #define in_le16(a)      in_arch(w,le16,a)
 131
 132 #define out_be32(a,v)   out_arch(l,be32,a,v)
 133 #define out_be16(a,v)   out_arch(w,be16,a,v)
 134
 135 #define in_be32(a)      in_arch(l,be32,a)
 136 #define in_be16(a)      in_arch(w,be16,a)
 137
 138 #define out_8(a,v)      __raw_writeb(v,a)
 139 #define in_8(a)         __raw_readb(a)
 140
 141 #define clrbits(type, addr, clear) \
 142         out_##type((addr), in_##type(addr) & ~(clear))
 143
 144 #define setbits(type, addr, set) \
 145         out_##type((addr), in_##type(addr) | (set))
 146
 147 #define clrsetbits(type, addr, clear, set) \
 148         out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
 149
 150 #define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
 151 #define setbits_be32(addr, set) setbits(be32, addr, set)
 152 #define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
 153
 154 #define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
 155 #define setbits_le32(addr, set) setbits(le32, addr, set)
 156 #define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
 157
 158 #define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
 159 #define setbits_be16(addr, set) setbits(be16, addr, set)
 160 #define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
 161
 162 #define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
 163 #define setbits_le16(addr, set) setbits(le16, addr, set)
 164 #define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
 165
 166 #define clrbits_8(addr, clear) clrbits(8, addr, clear)
 167 #define setbits_8(addr, set) setbits(8, addr, set)
 168 #define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
 169
 170 #define memset_io(a, b, c)              memset((void *)(a), (b), (c))
 171 #define memcpy_fromio(a, b, c)          memcpy((a), (void *)(b), (c))
 172 #define memcpy_toio(a, b, c)            memcpy((void *)(a), (b), (c))
 173
 174 #endif /* __ASM_NIOS2_IO_H_ */