arch/sparc/include/asm/io_32.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __SPARC_IO_H
   3 #define __SPARC_IO_H
   4
   5 #include <linux/kernel.h>
   6 #include <linux/ioport.h>  /* struct resource */
   7
   8 #define IO_SPACE_LIMIT 0xffffffff
   9
  10 #define memset_io(d,c,sz)     _memset_io(d,c,sz)
  11 #define memcpy_fromio(d,s,sz) _memcpy_fromio(d,s,sz)
  12 #define memcpy_toio(d,s,sz)   _memcpy_toio(d,s,sz)
  13
  14 #include <asm-generic/io.h>
  15
  16 static inline void _memset_io(volatile void __iomem *dst,
  17                               int c, __kernel_size_t n)
  18 {
  19         volatile void __iomem *d = dst;
  20
  21         while (n--) {
  22                 writeb(c, d);
  23                 d++;
  24         }
  25 }
  26
  27 static inline void _memcpy_fromio(void *dst, const volatile void __iomem *src,
  28                                   __kernel_size_t n)
  29 {
  30         char *d = dst;
  31
  32         while (n--) {
  33                 char tmp = readb(src);
  34                 *d++ = tmp;
  35                 src++;
  36         }
  37 }
  38
  39 static inline void _memcpy_toio(volatile void __iomem *dst, const void *src,
  40                                 __kernel_size_t n)
  41 {
  42         const char *s = src;
  43         volatile void __iomem *d = dst;
  44
  45         while (n--) {
  46                 char tmp = *s++;
  47                 writeb(tmp, d);
  48                 d++;
  49         }
  50 }
  51
  52 /*
  53  * SBus accessors.
  54  *
  55  * SBus has only one, memory mapped, I/O space.
  56  * We do not need to flip bytes for SBus of course.
  57  */
  58 static inline u8 sbus_readb(const volatile void __iomem *addr)
  59 {
  60         return *(__force volatile u8 *)addr;
  61 }
  62
  63 static inline u16 sbus_readw(const volatile void __iomem *addr)
  64 {
  65         return *(__force volatile u16 *)addr;
  66 }
  67
  68 static inline u32 sbus_readl(const volatile void __iomem *addr)
  69 {
  70         return *(__force volatile u32 *)addr;
  71 }
  72
  73 static inline void sbus_writeb(u8 b, volatile void __iomem *addr)
  74 {
  75         *(__force volatile u8 *)addr = b;
  76 }
  77
  78 static inline void sbus_writew(u16 w, volatile void __iomem *addr)
  79 {
  80         *(__force volatile u16 *)addr = w;
  81 }
  82
  83 static inline void sbus_writel(u32 l, volatile void __iomem *addr)
  84 {
  85         *(__force volatile u32 *)addr = l;
  86 }
  87
  88 static inline void sbus_memset_io(volatile void __iomem *__dst, int c,
  89                                   __kernel_size_t n)
  90 {
  91         while(n--) {
  92                 sbus_writeb(c, __dst);
  93                 __dst++;
  94         }
  95 }
  96
  97 static inline void sbus_memcpy_fromio(void *dst,
  98                                       const volatile void __iomem *src,
  99                                       __kernel_size_t n)
 100 {
 101         char *d = dst;
 102
 103         while (n--) {
 104                 char tmp = sbus_readb(src);
 105                 *d++ = tmp;
 106                 src++;
 107         }
 108 }
 109
 110 static inline void sbus_memcpy_toio(volatile void __iomem *dst,
 111                                     const void *src,
 112                                     __kernel_size_t n)
 113 {
 114         const char *s = src;
 115         volatile void __iomem *d = dst;
 116
 117         while (n--) {
 118                 char tmp = *s++;
 119                 sbus_writeb(tmp, d);
 120                 d++;
 121         }
 122 }
 123
 124 #ifdef __KERNEL__
 125
 126 /*
 127  * Bus number may be embedded in the higher bits of the physical address.
 128  * This is why we have no bus number argument to ioremap().
 129  */
 130 void __iomem *ioremap(phys_addr_t offset, size_t size);
 131 void iounmap(volatile void __iomem *addr);
 132 /* Create a virtual mapping cookie for an IO port range */
 133 void __iomem *ioport_map(unsigned long port, unsigned int nr);
 134 void ioport_unmap(void __iomem *);
 135
 136 /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
 137 struct pci_dev;
 138 void pci_iounmap(struct pci_dev *dev, void __iomem *);
 139
 140 static inline int sbus_can_dma_64bit(void)
 141 {
 142         return 0; /* actually, sparc_cpu_model==sun4d */
 143 }
 144 static inline int sbus_can_burst64(void)
 145 {
 146         return 0; /* actually, sparc_cpu_model==sun4d */
 147 }
 148 struct device;
 149 void sbus_set_sbus64(struct device *, int);
 150
 151 #endif
 152
 153 #define __ARCH_HAS_NO_PAGE_ZERO_MAPPED          1
 154
 155
 156 #endif /* !(__SPARC_IO_H) */