1 /* 2 * Copyright (C) 2006 Atmark Techno, Inc. 3 * 4 * This file is subject to the terms and conditions of the GNU General Public 5 * License. See the file "COPYING" in the main directory of this archive 6 * for more details. 7 */ 8 9 #ifndef _ASM_MICROBLAZE_IO_H 10 #define _ASM_MICROBLAZE_IO_H 11 12 #include <asm/byteorder.h> 13 #include <asm/page.h> 14 #include <linux/types.h> 15 16 #define IO_SPACE_LIMIT (0xFFFFFFFF) 17 18 static inline unsigned char __raw_readb(const volatile void __iomem *addr) 19 { 20 return *(volatile unsigned char __force *)addr; 21 } 22 static inline unsigned short __raw_readw(const volatile void __iomem *addr) 23 { 24 return *(volatile unsigned short __force *)addr; 25 } 26 static inline unsigned int __raw_readl(const volatile void __iomem *addr) 27 { 28 return *(volatile unsigned int __force *)addr; 29 } 30 static inline unsigned long __raw_readq(const volatile void __iomem *addr) 31 { 32 return *(volatile unsigned long __force *)addr; 33 } 34 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr) 35 { 36 *(volatile unsigned char __force *)addr = v; 37 } 38 static inline void __raw_writew(unsigned short v, volatile void __iomem *addr) 39 { 40 *(volatile unsigned short __force *)addr = v; 41 } 42 static inline void __raw_writel(unsigned int v, volatile void __iomem *addr) 43 { 44 *(volatile unsigned int __force *)addr = v; 45 } 46 static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr) 47 { 48 *(volatile unsigned long __force *)addr = v; 49 } 50 51 /* 52 * read (readb, readw, readl, readq) and write (writeb, writew, 53 * writel, writeq) accessors are for PCI and thus littel endian. 54 * Linux 2.4 for Microblaze had this wrong. 55 */ 56 static inline unsigned char readb(const volatile void __iomem *addr) 57 { 58 return *(volatile unsigned char __force *)addr; 59 } 60 static inline unsigned short readw(const volatile void __iomem *addr) 61 { 62 return le16_to_cpu(*(volatile unsigned short __force *)addr); 63 } 64 static inline unsigned int readl(const volatile void __iomem *addr) 65 { 66 return le32_to_cpu(*(volatile unsigned int __force *)addr); 67 } 68 static inline void writeb(unsigned char v, volatile void __iomem *addr) 69 { 70 *(volatile unsigned char __force *)addr = v; 71 } 72 static inline void writew(unsigned short v, volatile void __iomem *addr) 73 { 74 *(volatile unsigned short __force *)addr = cpu_to_le16(v); 75 } 76 static inline void writel(unsigned int v, volatile void __iomem *addr) 77 { 78 *(volatile unsigned int __force *)addr = cpu_to_le32(v); 79 } 80 81 /* ioread and iowrite variants. thease are for now same as __raw_ 82 * variants of accessors. we might check for endianess in the feature 83 */ 84 #define ioread8(addr) __raw_readb((u8 *)(addr)) 85 #define ioread16(addr) __raw_readw((u16 *)(addr)) 86 #define ioread32(addr) __raw_readl((u32 *)(addr)) 87 #define iowrite8(v, addr) __raw_writeb((u8)(v), (u8 *)(addr)) 88 #define iowrite16(v, addr) __raw_writew((u16)(v), (u16 *)(addr)) 89 #define iowrite32(v, addr) __raw_writel((u32)(v), (u32 *)(addr)) 90 91 /* These are the definitions for the x86 IO instructions 92 * inb/inw/inl/outb/outw/outl, the "string" versions 93 * insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions 94 * inb_p/inw_p/... 95 * The macros don't do byte-swapping. 96 */ 97 #define inb(port) readb((u8 *)((port))) 98 #define outb(val, port) writeb((val), (u8 *)((unsigned long)(port))) 99 #define inw(port) readw((u16 *)((port))) 100 #define outw(val, port) writew((val), (u16 *)((unsigned long)(port))) 101 #define inl(port) readl((u32 *)((port))) 102 #define outl(val, port) writel((val), (u32 *)((unsigned long)(port))) 103 104 #define inb_p(port) inb((port)) 105 #define outb_p(val, port) outb((val), (port)) 106 #define inw_p(port) inw((port)) 107 #define outw_p(val, port) outw((val), (port)) 108 #define inl_p(port) inl((port)) 109 #define outl_p(val, port) outl((val), (port)) 110 111 #define memset_io(a, b, c) memset((void *)(a), (b), (c)) 112 #define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c)) 113 #define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c)) 114 115 /** 116 * virt_to_phys - map virtual addresses to physical 117 * @address: address to remap 118 * 119 * The returned physical address is the physical (CPU) mapping for 120 * the memory address given. It is only valid to use this function on 121 * addresses directly mapped or allocated via kmalloc. 122 * 123 * This function does not give bus mappings for DMA transfers. In 124 * almost all conceivable cases a device driver should not be using 125 * this function 126 */ 127 static inline unsigned long __iomem virt_to_phys(volatile void *address) 128 { 129 return __pa((unsigned long)address); 130 } 131 132 #define virt_to_bus virt_to_phys 133 134 /** 135 * phys_to_virt - map physical address to virtual 136 * @address: address to remap 137 * 138 * The returned virtual address is a current CPU mapping for 139 * the memory address given. It is only valid to use this function on 140 * addresses that have a kernel mapping 141 * 142 * This function does not handle bus mappings for DMA transfers. In 143 * almost all conceivable cases a device driver should not be using 144 * this function 145 */ 146 static inline void *phys_to_virt(unsigned long address) 147 { 148 return (void *)__va(address); 149 } 150 151 #define bus_to_virt(a) phys_to_virt(a) 152 153 static inline void __iomem *__ioremap(phys_addr_t address, unsigned long size, 154 unsigned long flags) 155 { 156 return (void *)address; 157 } 158 159 #define ioremap(physaddr, size) ((void __iomem *)(unsigned long)(physaddr)) 160 #define iounmap(addr) ((void)0) 161 #define ioremap_nocache(physaddr, size) ioremap(physaddr, size) 162 163 /* 164 * Convert a physical pointer to a virtual kernel pointer for /dev/mem 165 * access 166 */ 167 #define xlate_dev_mem_ptr(p) __va(p) 168 169 /* 170 * Convert a virtual cached pointer to an uncached pointer 171 */ 172 #define xlate_dev_kmem_ptr(p) p 173 174 /* 175 * Big Endian 176 */ 177 #define out_be32(a, v) __raw_writel((v), (void __iomem __force *)(a)) 178 #define out_be16(a, v) __raw_writew((v), (a)) 179 180 #define in_be32(a) __raw_readl((const void __iomem __force *)(a)) 181 #define in_be16(a) __raw_readw(a) 182 183 /* 184 * Little endian 185 */ 186 187 #define out_le32(a, v) __raw_writel(__cpu_to_le32(v), (a)); 188 #define out_le16(a, v) __raw_writew(__cpu_to_le16(v), (a)) 189 190 #define in_le32(a) __le32_to_cpu(__raw_readl(a)) 191 #define in_le16(a) __le16_to_cpu(__raw_readw(a)) 192 193 /* Byte ops */ 194 #define out_8(a, v) __raw_writeb((v), (a)) 195 #define in_8(a) __raw_readb(a) 196 197 /* FIXME */ 198 static inline void __iomem *ioport_map(unsigned long port, unsigned int len) 199 { 200 return (void __iomem *) (port); 201 } 202 203 static inline void ioport_unmap(void __iomem *addr) 204 { 205 /* Nothing to do */ 206 } 207 208 #endif /* _ASM_MICROBLAZE_IO_H */ 209