/* * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> * Copyright (C) 2007-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. */ #ifndef _ASM_MICROBLAZE_IO_H #define _ASM_MICROBLAZE_IO_H #include <asm/byteorder.h> #include <asm/page.h> #include <linux/types.h> #include <linux/mm.h> /* Get struct page {...} */ #include <asm-generic/iomap.h> #ifndef CONFIG_PCI #define _IO_BASE 0 #define _ISA_MEM_BASE 0 #define PCI_DRAM_OFFSET 0 #else #define _IO_BASE isa_io_base #define _ISA_MEM_BASE isa_mem_base #define PCI_DRAM_OFFSET pci_dram_offset #endif extern unsigned long isa_io_base; extern unsigned long pci_io_base; extern unsigned long pci_dram_offset; extern resource_size_t isa_mem_base; #define IO_SPACE_LIMIT (0xFFFFFFFF) static inline unsigned char __raw_readb(const volatile void __iomem *addr) { return *(volatile unsigned char __force *)addr; } static inline unsigned short __raw_readw(const volatile void __iomem *addr) { return *(volatile unsigned short __force *)addr; } static inline unsigned int __raw_readl(const volatile void __iomem *addr) { return *(volatile unsigned int __force *)addr; } static inline unsigned long __raw_readq(const volatile void __iomem *addr) { return *(volatile unsigned long __force *)addr; } static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr) { *(volatile unsigned char __force *)addr = v; } static inline void __raw_writew(unsigned short v, volatile void __iomem *addr) { *(volatile unsigned short __force *)addr = v; } static inline void __raw_writel(unsigned int v, volatile void __iomem *addr) { *(volatile unsigned int __force *)addr = v; } static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr) { *(volatile unsigned long __force *)addr = v; } /* * read (readb, readw, readl, readq) and write (writeb, writew, * writel, writeq) accessors are for PCI and thus littel endian. * Linux 2.4 for Microblaze had this wrong. */ static inline unsigned char readb(const volatile void __iomem *addr) { return *(volatile unsigned char __force *)addr; } static inline unsigned short readw(const volatile void __iomem *addr) { return le16_to_cpu(*(volatile unsigned short __force *)addr); } static inline unsigned int readl(const volatile void __iomem *addr) { return le32_to_cpu(*(volatile unsigned int __force *)addr); } static inline void writeb(unsigned char v, volatile void __iomem *addr) { *(volatile unsigned char __force *)addr = v; } static inline void writew(unsigned short v, volatile void __iomem *addr) { *(volatile unsigned short __force *)addr = cpu_to_le16(v); } static inline void writel(unsigned int v, volatile void __iomem *addr) { *(volatile unsigned int __force *)addr = cpu_to_le32(v); } /* ioread and iowrite variants. thease are for now same as __raw_ * variants of accessors. we might check for endianess in the feature */ #define ioread8(addr) __raw_readb((u8 *)(addr)) #define ioread16(addr) __raw_readw((u16 *)(addr)) #define ioread32(addr) __raw_readl((u32 *)(addr)) #define iowrite8(v, addr) __raw_writeb((u8)(v), (u8 *)(addr)) #define iowrite16(v, addr) __raw_writew((u16)(v), (u16 *)(addr)) #define iowrite32(v, addr) __raw_writel((u32)(v), (u32 *)(addr)) #define ioread16be(addr) __raw_readw((u16 *)(addr)) #define ioread32be(addr) __raw_readl((u32 *)(addr)) #define iowrite16be(v, addr) __raw_writew((u16)(v), (u16 *)(addr)) #define iowrite32be(v, addr) __raw_writel((u32)(v), (u32 *)(addr)) /* These are the definitions for the x86 IO instructions * inb/inw/inl/outb/outw/outl, the "string" versions * insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions * inb_p/inw_p/... * The macros don't do byte-swapping. */ #define inb(port) readb((u8 *)((port))) #define outb(val, port) writeb((val), (u8 *)((unsigned long)(port))) #define inw(port) readw((u16 *)((port))) #define outw(val, port) writew((val), (u16 *)((unsigned long)(port))) #define inl(port) readl((u32 *)((port))) #define outl(val, port) writel((val), (u32 *)((unsigned long)(port))) #define inb_p(port) inb((port)) #define outb_p(val, port) outb((val), (port)) #define inw_p(port) inw((port)) #define outw_p(val, port) outw((val), (port)) #define inl_p(port) inl((port)) #define outl_p(val, port) outl((val), (port)) #define memset_io(a, b, c) memset((void *)(a), (b), (c)) #define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c)) #define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c)) #ifdef CONFIG_MMU #define phys_to_virt(addr) ((void *)__phys_to_virt(addr)) #define virt_to_phys(addr) ((unsigned long)__virt_to_phys(addr)) #define virt_to_bus(addr) ((unsigned long)__virt_to_phys(addr)) #define page_to_bus(page) (page_to_phys(page)) #define bus_to_virt(addr) (phys_to_virt(addr)) extern void iounmap(void *addr); /*extern void *__ioremap(phys_addr_t address, unsigned long size, unsigned long flags);*/ extern void __iomem *ioremap(phys_addr_t address, unsigned long size); #define ioremap_writethrough(addr, size) ioremap((addr), (size)) #define ioremap_nocache(addr, size) ioremap((addr), (size)) #define ioremap_fullcache(addr, size) ioremap((addr), (size)) #else /* CONFIG_MMU */ /** * virt_to_phys - map virtual addresses to physical * @address: address to remap * * The returned physical address is the physical (CPU) mapping for * the memory address given. It is only valid to use this function on * addresses directly mapped or allocated via kmalloc. * * This function does not give bus mappings for DMA transfers. In * almost all conceivable cases a device driver should not be using * this function */ static inline unsigned long __iomem virt_to_phys(volatile void *address) { return __pa((unsigned long)address); } #define virt_to_bus virt_to_phys /** * phys_to_virt - map physical address to virtual * @address: address to remap * * The returned virtual address is a current CPU mapping for * the memory address given. It is only valid to use this function on * addresses that have a kernel mapping * * This function does not handle bus mappings for DMA transfers. In * almost all conceivable cases a device driver should not be using * this function */ static inline void *phys_to_virt(unsigned long address) { return (void *)__va(address); } #define bus_to_virt(a) phys_to_virt(a) static inline void __iomem *__ioremap(phys_addr_t address, unsigned long size, unsigned long flags) { return (void *)address; } #define ioremap(physaddr, size) ((void __iomem *)(unsigned long)(physaddr)) #define iounmap(addr) ((void)0) #define ioremap_nocache(physaddr, size) ioremap(physaddr, size) #endif /* CONFIG_MMU */ /* * Convert a physical pointer to a virtual kernel pointer for /dev/mem * access */ #define xlate_dev_mem_ptr(p) __va(p) /* * Convert a virtual cached pointer to an uncached pointer */ #define xlate_dev_kmem_ptr(p) p /* * Big Endian */ #define out_be32(a, v) __raw_writel((v), (void __iomem __force *)(a)) #define out_be16(a, v) __raw_writew((v), (a)) #define in_be32(a) __raw_readl((const void __iomem __force *)(a)) #define in_be16(a) __raw_readw(a) #define writel_be(v, a) out_be32((__force unsigned *)a, v) #define readl_be(a) in_be32((__force unsigned *)a) /* * Little endian */ #define out_le32(a, v) __raw_writel(__cpu_to_le32(v), (a)) #define out_le16(a, v) __raw_writew(__cpu_to_le16(v), (a)) #define in_le32(a) __le32_to_cpu(__raw_readl(a)) #define in_le16(a) __le16_to_cpu(__raw_readw(a)) /* Byte ops */ #define out_8(a, v) __raw_writeb((v), (a)) #define in_8(a) __raw_readb(a) #define mmiowb() #define ioport_map(port, nr) ((void __iomem *)(port)) #define ioport_unmap(addr) #endif /* _ASM_MICROBLAZE_IO_H */