1 /* 2 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> 3 * Copyright (C) 2007-2009 PetaLogix 4 * Copyright (C) 2006 Atmark Techno, Inc. 5 * 6 * This file is subject to the terms and conditions of the GNU General Public 7 * License. See the file "COPYING" in the main directory of this archive 8 * for more details. 9 */ 10 11 #ifndef _ASM_MICROBLAZE_IO_H 12 #define _ASM_MICROBLAZE_IO_H 13 14 #include <asm/byteorder.h> 15 #include <asm/page.h> 16 #include <linux/types.h> 17 #include <asm/byteorder.h> 18 #include <linux/mm.h> /* Get struct page {...} */ 19 20 21 #define IO_SPACE_LIMIT (0xFFFFFFFF) 22 23 static inline unsigned char __raw_readb(const volatile void __iomem *addr) 24 { 25 return *(volatile unsigned char __force *)addr; 26 } 27 static inline unsigned short __raw_readw(const volatile void __iomem *addr) 28 { 29 return *(volatile unsigned short __force *)addr; 30 } 31 static inline unsigned int __raw_readl(const volatile void __iomem *addr) 32 { 33 return *(volatile unsigned int __force *)addr; 34 } 35 static inline unsigned long __raw_readq(const volatile void __iomem *addr) 36 { 37 return *(volatile unsigned long __force *)addr; 38 } 39 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr) 40 { 41 *(volatile unsigned char __force *)addr = v; 42 } 43 static inline void __raw_writew(unsigned short v, volatile void __iomem *addr) 44 { 45 *(volatile unsigned short __force *)addr = v; 46 } 47 static inline void __raw_writel(unsigned int v, volatile void __iomem *addr) 48 { 49 *(volatile unsigned int __force *)addr = v; 50 } 51 static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr) 52 { 53 *(volatile unsigned long __force *)addr = v; 54 } 55 56 /* 57 * read (readb, readw, readl, readq) and write (writeb, writew, 58 * writel, writeq) accessors are for PCI and thus littel endian. 59 * Linux 2.4 for Microblaze had this wrong. 60 */ 61 static inline unsigned char readb(const volatile void __iomem *addr) 62 { 63 return *(volatile unsigned char __force *)addr; 64 } 65 static inline unsigned short readw(const volatile void __iomem *addr) 66 { 67 return le16_to_cpu(*(volatile unsigned short __force *)addr); 68 } 69 static inline unsigned int readl(const volatile void __iomem *addr) 70 { 71 return le32_to_cpu(*(volatile unsigned int __force *)addr); 72 } 73 static inline void writeb(unsigned char v, volatile void __iomem *addr) 74 { 75 *(volatile unsigned char __force *)addr = v; 76 } 77 static inline void writew(unsigned short v, volatile void __iomem *addr) 78 { 79 *(volatile unsigned short __force *)addr = cpu_to_le16(v); 80 } 81 static inline void writel(unsigned int v, volatile void __iomem *addr) 82 { 83 *(volatile unsigned int __force *)addr = cpu_to_le32(v); 84 } 85 86 /* ioread and iowrite variants. thease are for now same as __raw_ 87 * variants of accessors. we might check for endianess in the feature 88 */ 89 #define ioread8(addr) __raw_readb((u8 *)(addr)) 90 #define ioread16(addr) __raw_readw((u16 *)(addr)) 91 #define ioread32(addr) __raw_readl((u32 *)(addr)) 92 #define iowrite8(v, addr) __raw_writeb((u8)(v), (u8 *)(addr)) 93 #define iowrite16(v, addr) __raw_writew((u16)(v), (u16 *)(addr)) 94 #define iowrite32(v, addr) __raw_writel((u32)(v), (u32 *)(addr)) 95 96 /* These are the definitions for the x86 IO instructions 97 * inb/inw/inl/outb/outw/outl, the "string" versions 98 * insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions 99 * inb_p/inw_p/... 100 * The macros don't do byte-swapping. 101 */ 102 #define inb(port) readb((u8 *)((port))) 103 #define outb(val, port) writeb((val), (u8 *)((unsigned long)(port))) 104 #define inw(port) readw((u16 *)((port))) 105 #define outw(val, port) writew((val), (u16 *)((unsigned long)(port))) 106 #define inl(port) readl((u32 *)((port))) 107 #define outl(val, port) writel((val), (u32 *)((unsigned long)(port))) 108 109 #define inb_p(port) inb((port)) 110 #define outb_p(val, port) outb((val), (port)) 111 #define inw_p(port) inw((port)) 112 #define outw_p(val, port) outw((val), (port)) 113 #define inl_p(port) inl((port)) 114 #define outl_p(val, port) outl((val), (port)) 115 116 #define memset_io(a, b, c) memset((void *)(a), (b), (c)) 117 #define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c)) 118 #define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c)) 119 120 #ifdef CONFIG_MMU 121 122 #define mm_ptov(addr) ((void *)__phys_to_virt(addr)) 123 #define mm_vtop(addr) ((unsigned long)__virt_to_phys(addr)) 124 #define phys_to_virt(addr) ((void *)__phys_to_virt(addr)) 125 #define virt_to_phys(addr) ((unsigned long)__virt_to_phys(addr)) 126 #define virt_to_bus(addr) ((unsigned long)__virt_to_phys(addr)) 127 128 #define __page_address(page) \ 129 (PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT)) 130 #define page_to_phys(page) virt_to_phys((void *)__page_address(page)) 131 #define page_to_bus(page) (page_to_phys(page)) 132 #define bus_to_virt(addr) (phys_to_virt(addr)) 133 134 extern void iounmap(void *addr); 135 /*extern void *__ioremap(phys_addr_t address, unsigned long size, 136 unsigned long flags);*/ 137 extern void __iomem *ioremap(phys_addr_t address, unsigned long size); 138 #define ioremap_writethrough(addr, size) ioremap((addr), (size)) 139 #define ioremap_nocache(addr, size) ioremap((addr), (size)) 140 #define ioremap_fullcache(addr, size) ioremap((addr), (size)) 141 142 #else /* CONFIG_MMU */ 143 144 /** 145 * virt_to_phys - map virtual addresses to physical 146 * @address: address to remap 147 * 148 * The returned physical address is the physical (CPU) mapping for 149 * the memory address given. It is only valid to use this function on 150 * addresses directly mapped or allocated via kmalloc. 151 * 152 * This function does not give bus mappings for DMA transfers. In 153 * almost all conceivable cases a device driver should not be using 154 * this function 155 */ 156 static inline unsigned long __iomem virt_to_phys(volatile void *address) 157 { 158 return __pa((unsigned long)address); 159 } 160 161 #define virt_to_bus virt_to_phys 162 163 /** 164 * phys_to_virt - map physical address to virtual 165 * @address: address to remap 166 * 167 * The returned virtual address is a current CPU mapping for 168 * the memory address given. It is only valid to use this function on 169 * addresses that have a kernel mapping 170 * 171 * This function does not handle bus mappings for DMA transfers. In 172 * almost all conceivable cases a device driver should not be using 173 * this function 174 */ 175 static inline void *phys_to_virt(unsigned long address) 176 { 177 return (void *)__va(address); 178 } 179 180 #define bus_to_virt(a) phys_to_virt(a) 181 182 static inline void __iomem *__ioremap(phys_addr_t address, unsigned long size, 183 unsigned long flags) 184 { 185 return (void *)address; 186 } 187 188 #define ioremap(physaddr, size) ((void __iomem *)(unsigned long)(physaddr)) 189 #define iounmap(addr) ((void)0) 190 #define ioremap_nocache(physaddr, size) ioremap(physaddr, size) 191 192 #endif /* CONFIG_MMU */ 193 194 /* 195 * Convert a physical pointer to a virtual kernel pointer for /dev/mem 196 * access 197 */ 198 #define xlate_dev_mem_ptr(p) __va(p) 199 200 /* 201 * Convert a virtual cached pointer to an uncached pointer 202 */ 203 #define xlate_dev_kmem_ptr(p) p 204 205 /* 206 * Big Endian 207 */ 208 #define out_be32(a, v) __raw_writel((v), (void __iomem __force *)(a)) 209 #define out_be16(a, v) __raw_writew((v), (a)) 210 211 #define in_be32(a) __raw_readl((const void __iomem __force *)(a)) 212 #define in_be16(a) __raw_readw(a) 213 214 /* 215 * Little endian 216 */ 217 218 #define out_le32(a, v) __raw_writel(__cpu_to_le32(v), (a)); 219 #define out_le16(a, v) __raw_writew(__cpu_to_le16(v), (a)) 220 221 #define in_le32(a) __le32_to_cpu(__raw_readl(a)) 222 #define in_le16(a) __le16_to_cpu(__raw_readw(a)) 223 224 /* Byte ops */ 225 #define out_8(a, v) __raw_writeb((v), (a)) 226 #define in_8(a) __raw_readb(a) 227 228 /* FIXME */ 229 static inline void __iomem *ioport_map(unsigned long port, unsigned int len) 230 { 231 return (void __iomem *) (port); 232 } 233 234 static inline void ioport_unmap(void __iomem *addr) 235 { 236 /* Nothing to do */ 237 } 238 239 #endif /* _ASM_MICROBLAZE_IO_H */ 240