arch/powerpc/kernel/iomap.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * ppc64 "iomap" interface implementation.
   4  *
   5  * (C) Copyright 2004 Linus Torvalds
   6  */
   7 #include <linux/pci.h>
   8 #include <linux/mm.h>
   9 #include <linux/export.h>
  10 #include <asm/io.h>
  11 #include <asm/pci-bridge.h>
  12 #include <asm/isa-bridge.h>
  13
  14 /*
  15  * Here comes the ppc64 implementation of the IOMAP
  16  * interfaces.
  17  */
  18 unsigned int ioread8(void __iomem *addr)
  19 {
  20         return readb(addr);
  21 }
  22 unsigned int ioread16(void __iomem *addr)
  23 {
  24         return readw(addr);
  25 }
  26 unsigned int ioread16be(void __iomem *addr)
  27 {
  28         return readw_be(addr);
  29 }
  30 unsigned int ioread32(void __iomem *addr)
  31 {
  32         return readl(addr);
  33 }
  34 unsigned int ioread32be(void __iomem *addr)
  35 {
  36         return readl_be(addr);
  37 }
  38 EXPORT_SYMBOL(ioread8);
  39 EXPORT_SYMBOL(ioread16);
  40 EXPORT_SYMBOL(ioread16be);
  41 EXPORT_SYMBOL(ioread32);
  42 EXPORT_SYMBOL(ioread32be);
  43 #ifdef __powerpc64__
  44 u64 ioread64(void __iomem *addr)
  45 {
  46         return readq(addr);
  47 }
  48 u64 ioread64_lo_hi(void __iomem *addr)
  49 {
  50         return readq(addr);
  51 }
  52 u64 ioread64_hi_lo(void __iomem *addr)
  53 {
  54         return readq(addr);
  55 }
  56 u64 ioread64be(void __iomem *addr)
  57 {
  58         return readq_be(addr);
  59 }
  60 u64 ioread64be_lo_hi(void __iomem *addr)
  61 {
  62         return readq_be(addr);
  63 }
  64 u64 ioread64be_hi_lo(void __iomem *addr)
  65 {
  66         return readq_be(addr);
  67 }
  68 EXPORT_SYMBOL(ioread64);
  69 EXPORT_SYMBOL(ioread64_lo_hi);
  70 EXPORT_SYMBOL(ioread64_hi_lo);
  71 EXPORT_SYMBOL(ioread64be);
  72 EXPORT_SYMBOL(ioread64be_lo_hi);
  73 EXPORT_SYMBOL(ioread64be_hi_lo);
  74 #endif /* __powerpc64__ */
  75
  76 void iowrite8(u8 val, void __iomem *addr)
  77 {
  78         writeb(val, addr);
  79 }
  80 void iowrite16(u16 val, void __iomem *addr)
  81 {
  82         writew(val, addr);
  83 }
  84 void iowrite16be(u16 val, void __iomem *addr)
  85 {
  86         writew_be(val, addr);
  87 }
  88 void iowrite32(u32 val, void __iomem *addr)
  89 {
  90         writel(val, addr);
  91 }
  92 void iowrite32be(u32 val, void __iomem *addr)
  93 {
  94         writel_be(val, addr);
  95 }
  96 EXPORT_SYMBOL(iowrite8);
  97 EXPORT_SYMBOL(iowrite16);
  98 EXPORT_SYMBOL(iowrite16be);
  99 EXPORT_SYMBOL(iowrite32);
 100 EXPORT_SYMBOL(iowrite32be);
 101 #ifdef __powerpc64__
 102 void iowrite64(u64 val, void __iomem *addr)
 103 {
 104         writeq(val, addr);
 105 }
 106 void iowrite64_lo_hi(u64 val, void __iomem *addr)
 107 {
 108         writeq(val, addr);
 109 }
 110 void iowrite64_hi_lo(u64 val, void __iomem *addr)
 111 {
 112         writeq(val, addr);
 113 }
 114 void iowrite64be(u64 val, void __iomem *addr)
 115 {
 116         writeq_be(val, addr);
 117 }
 118 void iowrite64be_lo_hi(u64 val, void __iomem *addr)
 119 {
 120         writeq_be(val, addr);
 121 }
 122 void iowrite64be_hi_lo(u64 val, void __iomem *addr)
 123 {
 124         writeq_be(val, addr);
 125 }
 126 EXPORT_SYMBOL(iowrite64);
 127 EXPORT_SYMBOL(iowrite64_lo_hi);
 128 EXPORT_SYMBOL(iowrite64_hi_lo);
 129 EXPORT_SYMBOL(iowrite64be);
 130 EXPORT_SYMBOL(iowrite64be_lo_hi);
 131 EXPORT_SYMBOL(iowrite64be_hi_lo);
 132 #endif /* __powerpc64__ */
 133
 134 /*
 135  * These are the "repeat read/write" functions. Note the
 136  * non-CPU byte order. We do things in "IO byteorder"
 137  * here.
 138  *
 139  * FIXME! We could make these do EEH handling if we really
 140  * wanted. Not clear if we do.
 141  */
 142 void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
 143 {
 144         readsb(addr, dst, count);
 145 }
 146 void ioread16_rep(void __iomem *addr, void *dst, unsigned long count)
 147 {
 148         readsw(addr, dst, count);
 149 }
 150 void ioread32_rep(void __iomem *addr, void *dst, unsigned long count)
 151 {
 152         readsl(addr, dst, count);
 153 }
 154 EXPORT_SYMBOL(ioread8_rep);
 155 EXPORT_SYMBOL(ioread16_rep);
 156 EXPORT_SYMBOL(ioread32_rep);
 157
 158 void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
 159 {
 160         writesb(addr, src, count);
 161 }
 162 void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
 163 {
 164         writesw(addr, src, count);
 165 }
 166 void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
 167 {
 168         writesl(addr, src, count);
 169 }
 170 EXPORT_SYMBOL(iowrite8_rep);
 171 EXPORT_SYMBOL(iowrite16_rep);
 172 EXPORT_SYMBOL(iowrite32_rep);
 173
 174 void __iomem *ioport_map(unsigned long port, unsigned int len)
 175 {
 176         return (void __iomem *) (port + _IO_BASE);
 177 }
 178
 179 void ioport_unmap(void __iomem *addr)
 180 {
 181         /* Nothing to do */
 182 }
 183 EXPORT_SYMBOL(ioport_map);
 184 EXPORT_SYMBOL(ioport_unmap);
 185
 186 #ifdef CONFIG_PCI
 187 void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
 188 {
 189         if (isa_vaddr_is_ioport(addr))
 190                 return;
 191         if (pcibios_vaddr_is_ioport(addr))
 192                 return;
 193         iounmap(addr);
 194 }
 195
 196 EXPORT_SYMBOL(pci_iounmap);
 197 #endif /* CONFIG_PCI */