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 <linux/mm.h> /* Get struct page {...} */ 18 #include <asm-generic/iomap.h> 19 20 #define PCI_DRAM_OFFSET 0 21 22 #define IO_SPACE_LIMIT (0xFFFFFFFF) 23 24 static inline unsigned char __raw_readb(const volatile void __iomem *addr) 25 { 26 return *(volatile unsigned char __force *)addr; 27 } 28 static inline unsigned short __raw_readw(const volatile void __iomem *addr) 29 { 30 return *(volatile unsigned short __force *)addr; 31 } 32 static inline unsigned int __raw_readl(const volatile void __iomem *addr) 33 { 34 return *(volatile unsigned int __force *)addr; 35 } 36 static inline unsigned long __raw_readq(const volatile void __iomem *addr) 37 { 38 return *(volatile unsigned long __force *)addr; 39 } 40 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr) 41 { 42 *(volatile unsigned char __force *)addr = v; 43 } 44 static inline void __raw_writew(unsigned short v, volatile void __iomem *addr) 45 { 46 *(volatile unsigned short __force *)addr = v; 47 } 48 static inline void __raw_writel(unsigned int v, volatile void __iomem *addr) 49 { 50 *(volatile unsigned int __force *)addr = v; 51 } 52 static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr) 53 { 54 *(volatile unsigned long __force *)addr = v; 55 } 56 57 /* 58 * read (readb, readw, readl, readq) and write (writeb, writew, 59 * writel, writeq) accessors are for PCI and thus littel endian. 60 * Linux 2.4 for Microblaze had this wrong. 61 */ 62 static inline unsigned char readb(const volatile void __iomem *addr) 63 { 64 return *(volatile unsigned char __force *)addr; 65 } 66 static inline unsigned short readw(const volatile void __iomem *addr) 67 { 68 return le16_to_cpu(*(volatile unsigned short __force *)addr); 69 } 70 static inline unsigned int readl(const volatile void __iomem *addr) 71 { 72 return le32_to_cpu(*(volatile unsigned int __force *)addr); 73 } 74 static inline void writeb(unsigned char v, volatile void __iomem *addr) 75 { 76 *(volatile unsigned char __force *)addr = v; 77 } 78 static inline void writew(unsigned short v, volatile void __iomem *addr) 79 { 80 *(volatile unsigned short __force *)addr = cpu_to_le16(v); 81 } 82 static inline void writel(unsigned int v, volatile void __iomem *addr) 83 { 84 *(volatile unsigned int __force *)addr = cpu_to_le32(v); 85 } 86 87 /* ioread and iowrite variants. thease are for now same as __raw_ 88 * variants of accessors. we might check for endianess in the feature 89 */ 90 #define ioread8(addr) __raw_readb((u8 *)(addr)) 91 #define ioread16(addr) __raw_readw((u16 *)(addr)) 92 #define ioread32(addr) __raw_readl((u32 *)(addr)) 93 #define iowrite8(v, addr) __raw_writeb((u8)(v), (u8 *)(addr)) 94 #define iowrite16(v, addr) __raw_writew((u16)(v), (u16 *)(addr)) 95 #define iowrite32(v, addr) __raw_writel((u32)(v), (u32 *)(addr)) 96 97 /* These are the definitions for the x86 IO instructions 98 * inb/inw/inl/outb/outw/outl, the "string" versions 99 * insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions 100 * inb_p/inw_p/... 101 * The macros don't do byte-swapping. 102 */ 103 #define inb(port) readb((u8 *)((port))) 104 #define outb(val, port) writeb((val), (u8 *)((unsigned long)(port))) 105 #define inw(port) readw((u16 *)((port))) 106 #define outw(val, port) writew((val), (u16 *)((unsigned long)(port))) 107 #define inl(port) readl((u32 *)((port))) 108 #define outl(val, port) writel((val), (u32 *)((unsigned long)(port))) 109 110 #define inb_p(port) inb((port)) 111 #define outb_p(val, port) outb((val), (port)) 112 #define inw_p(port) inw((port)) 113 #define outw_p(val, port) outw((val), (port)) 114 #define inl_p(port) inl((port)) 115 #define outl_p(val, port) outl((val), (port)) 116 117 #define memset_io(a, b, c) memset((void *)(a), (b), (c)) 118 #define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c)) 119 #define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c)) 120 121 #ifdef CONFIG_MMU 122 123 #define mm_ptov(addr) ((void *)__phys_to_virt(addr)) 124 #define mm_vtop(addr) ((unsigned long)__virt_to_phys(addr)) 125 #define phys_to_virt(addr) ((void *)__phys_to_virt(addr)) 126 #define virt_to_phys(addr) ((unsigned long)__virt_to_phys(addr)) 127 #define virt_to_bus(addr) ((unsigned long)__virt_to_phys(addr)) 128 129 #define __page_address(page) \ 130 (PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT)) 131 #define page_to_phys(page) virt_to_phys((void *)__page_address(page)) 132 #define page_to_bus(page) (page_to_phys(page)) 133 #define bus_to_virt(addr) (phys_to_virt(addr)) 134 135 extern void iounmap(void *addr); 136 /*extern void *__ioremap(phys_addr_t address, unsigned long size, 137 unsigned long flags);*/ 138 extern void __iomem *ioremap(phys_addr_t address, unsigned long size); 139 #define ioremap_writethrough(addr, size) ioremap((addr), (size)) 140 #define ioremap_nocache(addr, size) ioremap((addr), (size)) 141 #define ioremap_fullcache(addr, size) ioremap((addr), (size)) 142 143 #else /* CONFIG_MMU */ 144 145 /** 146 * virt_to_phys - map virtual addresses to physical 147 * @address: address to remap 148 * 149 * The returned physical address is the physical (CPU) mapping for 150 * the memory address given. It is only valid to use this function on 151 * addresses directly mapped or allocated via kmalloc. 152 * 153 * This function does not give bus mappings for DMA transfers. In 154 * almost all conceivable cases a device driver should not be using 155 * this function 156 */ 157 static inline unsigned long __iomem virt_to_phys(volatile void *address) 158 { 159 return __pa((unsigned long)address); 160 } 161 162 #define virt_to_bus virt_to_phys 163 164 /** 165 * phys_to_virt - map physical address to virtual 166 * @address: address to remap 167 * 168 * The returned virtual address is a current CPU mapping for 169 * the memory address given. It is only valid to use this function on 170 * addresses that have a kernel mapping 171 * 172 * This function does not handle bus mappings for DMA transfers. In 173 * almost all conceivable cases a device driver should not be using 174 * this function 175 */ 176 static inline void *phys_to_virt(unsigned long address) 177 { 178 return (void *)__va(address); 179 } 180 181 #define bus_to_virt(a) phys_to_virt(a) 182 183 static inline void __iomem *__ioremap(phys_addr_t address, unsigned long size, 184 unsigned long flags) 185 { 186 return (void *)address; 187 } 188 189 #define ioremap(physaddr, size) ((void __iomem *)(unsigned long)(physaddr)) 190 #define iounmap(addr) ((void)0) 191 #define ioremap_nocache(physaddr, size) ioremap(physaddr, size) 192 193 #endif /* CONFIG_MMU */ 194 195 /* 196 * Convert a physical pointer to a virtual kernel pointer for /dev/mem 197 * access 198 */ 199 #define xlate_dev_mem_ptr(p) __va(p) 200 201 /* 202 * Convert a virtual cached pointer to an uncached pointer 203 */ 204 #define xlate_dev_kmem_ptr(p) p 205 206 /* 207 * Big Endian 208 */ 209 #define out_be32(a, v) __raw_writel((v), (void __iomem __force *)(a)) 210 #define out_be16(a, v) __raw_writew((v), (a)) 211 212 #define in_be32(a) __raw_readl((const void __iomem __force *)(a)) 213 #define in_be16(a) __raw_readw(a) 214 215 #define writel_be(v, a) out_be32((__force unsigned *)a, v) 216 #define readl_be(a) in_be32((__force unsigned *)a) 217 218 /* 219 * Little endian 220 */ 221 222 #define out_le32(a, v) __raw_writel(__cpu_to_le32(v), (a)) 223 #define out_le16(a, v) __raw_writew(__cpu_to_le16(v), (a)) 224 225 #define in_le32(a) __le32_to_cpu(__raw_readl(a)) 226 #define in_le16(a) __le16_to_cpu(__raw_readw(a)) 227 228 /* Byte ops */ 229 #define out_8(a, v) __raw_writeb((v), (a)) 230 #define in_8(a) __raw_readb(a) 231 232 #define ioport_map(port, nr) ((void __iomem *)(port)) 233 #define ioport_unmap(addr) 234 235 #endif /* _ASM_MICROBLAZE_IO_H */ 236