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 30extern unsigned long isa_io_base; 31extern unsigned long pci_io_base; 32extern unsigned long pci_dram_offset; 33 34extern resource_size_t isa_mem_base; 35 36#define IO_SPACE_LIMIT (0xFFFFFFFF) 37 38static inline unsigned char __raw_readb(const volatile void __iomem *addr) 39{ 40 return *(volatile unsigned char __force *)addr; 41} 42static inline unsigned short __raw_readw(const volatile void __iomem *addr) 43{ 44 return *(volatile unsigned short __force *)addr; 45} 46static inline unsigned int __raw_readl(const volatile void __iomem *addr) 47{ 48 return *(volatile unsigned int __force *)addr; 49} 50static inline unsigned long __raw_readq(const volatile void __iomem *addr) 51{ 52 return *(volatile unsigned long __force *)addr; 53} 54static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr) 55{ 56 *(volatile unsigned char __force *)addr = v; 57} 58static inline void __raw_writew(unsigned short v, volatile void __iomem *addr) 59{ 60 *(volatile unsigned short __force *)addr = v; 61} 62static inline void __raw_writel(unsigned int v, volatile void __iomem *addr) 63{ 64 *(volatile unsigned int __force *)addr = v; 65} 66static 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 */ 76static inline unsigned char readb(const volatile void __iomem *addr) 77{ 78 return *(volatile unsigned char __force *)addr; 79} 80static inline unsigned short readw(const volatile void __iomem *addr) 81{ 82 return le16_to_cpu(*(volatile unsigned short __force *)addr); 83} 84static inline unsigned int readl(const volatile void __iomem *addr) 85{ 86 return le32_to_cpu(*(volatile unsigned int __force *)addr); 87} 88static inline void writeb(unsigned char v, volatile void __iomem *addr) 89{ 90 *(volatile unsigned char __force *)addr = v; 91} 92static inline void writew(unsigned short v, volatile void __iomem *addr) 93{ 94 *(volatile unsigned short __force *)addr = cpu_to_le16(v); 95} 96static 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#define ioread16be(addr) __raw_readw((u16 *)(addr)) 112#define ioread32be(addr) __raw_readl((u32 *)(addr)) 113#define iowrite16be(v, addr) __raw_writew((u16)(v), (u16 *)(addr)) 114#define iowrite32be(v, addr) __raw_writel((u32)(v), (u32 *)(addr)) 115 116/* These are the definitions for the x86 IO instructions 117 * inb/inw/inl/outb/outw/outl, the "string" versions 118 * insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions 119 * inb_p/inw_p/... 120 * The macros don't do byte-swapping. 121 */ 122#define inb(port) readb((u8 *)((port))) 123#define outb(val, port) writeb((val), (u8 *)((unsigned long)(port))) 124#define inw(port) readw((u16 *)((port))) 125#define outw(val, port) writew((val), (u16 *)((unsigned long)(port))) 126#define inl(port) readl((u32 *)((port))) 127#define outl(val, port) writel((val), (u32 *)((unsigned long)(port))) 128 129#define inb_p(port) inb((port)) 130#define outb_p(val, port) outb((val), (port)) 131#define inw_p(port) inw((port)) 132#define outw_p(val, port) outw((val), (port)) 133#define inl_p(port) inl((port)) 134#define outl_p(val, port) outl((val), (port)) 135 136#define memset_io(a, b, c) memset((void *)(a), (b), (c)) 137#define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c)) 138#define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c)) 139 140#ifdef CONFIG_MMU 141 142#define phys_to_virt(addr) ((void *)__phys_to_virt(addr)) 143#define virt_to_phys(addr) ((unsigned long)__virt_to_phys(addr)) 144#define virt_to_bus(addr) ((unsigned long)__virt_to_phys(addr)) 145 146#define page_to_bus(page) (page_to_phys(page)) 147#define bus_to_virt(addr) (phys_to_virt(addr)) 148 149extern void iounmap(void *addr); 150/*extern void *__ioremap(phys_addr_t address, unsigned long size, 151 unsigned long flags);*/ 152extern 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 */ 171static 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 */ 190static 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 197static 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