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 #ifndef CONFIG_PCI 21 #define _IO_BASE 0 22 #define _ISA_MEM_BASE 0 23 #define PCI_DRAM_OFFSET 0 24 #else 25 #define _IO_BASE isa_io_base 26 #define _ISA_MEM_BASE isa_mem_base 27 #define PCI_DRAM_OFFSET pci_dram_offset 28 #endif 29 30 extern unsigned long isa_io_base; 31 extern unsigned long pci_io_base; 32 extern unsigned long pci_dram_offset; 33 34 extern resource_size_t isa_mem_base; 35 36 #define IO_SPACE_LIMIT (0xFFFFFFFF) 37 38 static inline unsigned char __raw_readb(const volatile void __iomem *addr) 39 { 40 return *(volatile unsigned char __force *)addr; 41 } 42 static inline unsigned short __raw_readw(const volatile void __iomem *addr) 43 { 44 return *(volatile unsigned short __force *)addr; 45 } 46 static inline unsigned int __raw_readl(const volatile void __iomem *addr) 47 { 48 return *(volatile unsigned int __force *)addr; 49 } 50 static inline unsigned long __raw_readq(const volatile void __iomem *addr) 51 { 52 return *(volatile unsigned long __force *)addr; 53 } 54 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr) 55 { 56 *(volatile unsigned char __force *)addr = v; 57 } 58 static inline void __raw_writew(unsigned short v, volatile void __iomem *addr) 59 { 60 *(volatile unsigned short __force *)addr = v; 61 } 62 static inline void __raw_writel(unsigned int v, volatile void __iomem *addr) 63 { 64 *(volatile unsigned int __force *)addr = v; 65 } 66 static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr) 67 { 68 *(volatile unsigned long __force *)addr = v; 69 } 70 71 /* 72 * read (readb, readw, readl, readq) and write (writeb, writew, 73 * writel, writeq) accessors are for PCI and thus littel endian. 74 * Linux 2.4 for Microblaze had this wrong. 75 */ 76 static inline unsigned char readb(const volatile void __iomem *addr) 77 { 78 return *(volatile unsigned char __force *)addr; 79 } 80 static inline unsigned short readw(const volatile void __iomem *addr) 81 { 82 return le16_to_cpu(*(volatile unsigned short __force *)addr); 83 } 84 static inline unsigned int readl(const volatile void __iomem *addr) 85 { 86 return le32_to_cpu(*(volatile unsigned int __force *)addr); 87 } 88 static inline void writeb(unsigned char v, volatile void __iomem *addr) 89 { 90 *(volatile unsigned char __force *)addr = v; 91 } 92 static inline void writew(unsigned short v, volatile void __iomem *addr) 93 { 94 *(volatile unsigned short __force *)addr = cpu_to_le16(v); 95 } 96 static inline void writel(unsigned int v, volatile void __iomem *addr) 97 { 98 *(volatile unsigned int __force *)addr = cpu_to_le32(v); 99 } 100 101 /* ioread and iowrite variants. thease are for now same as __raw_ 102 * variants of accessors. we might check for endianess in the feature 103 */ 104 #define ioread8(addr) __raw_readb((u8 *)(addr)) 105 #define ioread16(addr) __raw_readw((u16 *)(addr)) 106 #define ioread32(addr) __raw_readl((u32 *)(addr)) 107 #define iowrite8(v, addr) __raw_writeb((u8)(v), (u8 *)(addr)) 108 #define iowrite16(v, addr) __raw_writew((u16)(v), (u16 *)(addr)) 109 #define iowrite32(v, addr) __raw_writel((u32)(v), (u32 *)(addr)) 110 111 /* These are the definitions for the x86 IO instructions 112 * inb/inw/inl/outb/outw/outl, the "string" versions 113 * insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions 114 * inb_p/inw_p/... 115 * The macros don't do byte-swapping. 116 */ 117 #define inb(port) readb((u8 *)((port))) 118 #define outb(val, port) writeb((val), (u8 *)((unsigned long)(port))) 119 #define inw(port) readw((u16 *)((port))) 120 #define outw(val, port) writew((val), (u16 *)((unsigned long)(port))) 121 #define inl(port) readl((u32 *)((port))) 122 #define outl(val, port) writel((val), (u32 *)((unsigned long)(port))) 123 124 #define inb_p(port) inb((port)) 125 #define outb_p(val, port) outb((val), (port)) 126 #define inw_p(port) inw((port)) 127 #define outw_p(val, port) outw((val), (port)) 128 #define inl_p(port) inl((port)) 129 #define outl_p(val, port) outl((val), (port)) 130 131 #define memset_io(a, b, c) memset((void *)(a), (b), (c)) 132 #define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c)) 133 #define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c)) 134 135 #ifdef CONFIG_MMU 136 137 #define mm_ptov(addr) ((void *)__phys_to_virt(addr)) 138 #define mm_vtop(addr) ((unsigned long)__virt_to_phys(addr)) 139 #define phys_to_virt(addr) ((void *)__phys_to_virt(addr)) 140 #define virt_to_phys(addr) ((unsigned long)__virt_to_phys(addr)) 141 #define virt_to_bus(addr) ((unsigned long)__virt_to_phys(addr)) 142 143 #define __page_address(page) \ 144 (PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT)) 145 #define page_to_phys(page) virt_to_phys((void *)__page_address(page)) 146 #define page_to_bus(page) (page_to_phys(page)) 147 #define bus_to_virt(addr) (phys_to_virt(addr)) 148 149 extern void iounmap(void *addr); 150 /*extern void *__ioremap(phys_addr_t address, unsigned long size, 151 unsigned long flags);*/ 152 extern void __iomem *ioremap(phys_addr_t address, unsigned long size); 153 #define ioremap_writethrough(addr, size) ioremap((addr), (size)) 154 #define ioremap_nocache(addr, size) ioremap((addr), (size)) 155 #define ioremap_fullcache(addr, size) ioremap((addr), (size)) 156 157 #else /* CONFIG_MMU */ 158 159 /** 160 * virt_to_phys - map virtual addresses to physical 161 * @address: address to remap 162 * 163 * The returned physical address is the physical (CPU) mapping for 164 * the memory address given. It is only valid to use this function on 165 * addresses directly mapped or allocated via kmalloc. 166 * 167 * This function does not give bus mappings for DMA transfers. In 168 * almost all conceivable cases a device driver should not be using 169 * this function 170 */ 171 static inline unsigned long __iomem virt_to_phys(volatile void *address) 172 { 173 return __pa((unsigned long)address); 174 } 175 176 #define virt_to_bus virt_to_phys 177 178 /** 179 * phys_to_virt - map physical address to virtual 180 * @address: address to remap 181 * 182 * The returned virtual address is a current CPU mapping for 183 * the memory address given. It is only valid to use this function on 184 * addresses that have a kernel mapping 185 * 186 * This function does not handle bus mappings for DMA transfers. In 187 * almost all conceivable cases a device driver should not be using 188 * this function 189 */ 190 static inline void *phys_to_virt(unsigned long address) 191 { 192 return (void *)__va(address); 193 } 194 195 #define bus_to_virt(a) phys_to_virt(a) 196 197 static inline void __iomem *__ioremap(phys_addr_t address, unsigned long size, 198 unsigned long flags) 199 { 200 return (void *)address; 201 } 202 203 #define ioremap(physaddr, size) ((void __iomem *)(unsigned long)(physaddr)) 204 #define iounmap(addr) ((void)0) 205 #define ioremap_nocache(physaddr, size) ioremap(physaddr, size) 206 207 #endif /* CONFIG_MMU */ 208 209 /* 210 * Convert a physical pointer to a virtual kernel pointer for /dev/mem 211 * access 212 */ 213 #define xlate_dev_mem_ptr(p) __va(p) 214 215 /* 216 * Convert a virtual cached pointer to an uncached pointer 217 */ 218 #define xlate_dev_kmem_ptr(p) p 219 220 /* 221 * Big Endian 222 */ 223 #define out_be32(a, v) __raw_writel((v), (void __iomem __force *)(a)) 224 #define out_be16(a, v) __raw_writew((v), (a)) 225 226 #define in_be32(a) __raw_readl((const void __iomem __force *)(a)) 227 #define in_be16(a) __raw_readw(a) 228 229 #define writel_be(v, a) out_be32((__force unsigned *)a, v) 230 #define readl_be(a) in_be32((__force unsigned *)a) 231 232 /* 233 * Little endian 234 */ 235 236 #define out_le32(a, v) __raw_writel(__cpu_to_le32(v), (a)) 237 #define out_le16(a, v) __raw_writew(__cpu_to_le16(v), (a)) 238 239 #define in_le32(a) __le32_to_cpu(__raw_readl(a)) 240 #define in_le16(a) __le16_to_cpu(__raw_readw(a)) 241 242 /* Byte ops */ 243 #define out_8(a, v) __raw_writeb((v), (a)) 244 #define in_8(a) __raw_readb(a) 245 246 #define ioport_map(port, nr) ((void __iomem *)(port)) 247 #define ioport_unmap(addr) 248 249 #endif /* _ASM_MICROBLAZE_IO_H */ 250