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Diffstat (limited to 'arch/m32r/include/asm/io.h')
| -rw-r--r-- | arch/m32r/include/asm/io.h | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/arch/m32r/include/asm/io.h b/arch/m32r/include/asm/io.h new file mode 100644 index 00000000000..d06933bd631 --- /dev/null +++ b/arch/m32r/include/asm/io.h @@ -0,0 +1,200 @@ +#ifndef _ASM_M32R_IO_H +#define _ASM_M32R_IO_H + +#include <linux/string.h> +#include <linux/compiler.h> +#include <asm/page.h> /* __va */ + +#ifdef __KERNEL__ + +#define IO_SPACE_LIMIT 0xFFFFFFFF + +/** + * 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 virt_to_phys(volatile void * address) +{ + return __pa(address); +} + +/** + * 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 __va(address); +} + +extern void __iomem * +__ioremap(unsigned long offset, unsigned long size, unsigned long flags); + +/** + * ioremap - map bus memory into CPU space + * @offset: bus address of the memory + * @size: size of the resource to map + * + * ioremap performs a platform specific sequence of operations to + * make bus memory CPU accessible via the readb/readw/readl/writeb/ + * writew/writel functions and the other mmio helpers. The returned + * address is not guaranteed to be usable directly as a virtual + * address. + */ + +static inline void __iomem *ioremap(unsigned long offset, unsigned long size) +{ + return __ioremap(offset, size, 0); +} + +extern void iounmap(volatile void __iomem *addr); +#define ioremap_nocache(off,size) ioremap(off,size) + +/* + * IO bus memory addresses are also 1:1 with the physical address + */ +#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) +#define page_to_bus page_to_phys +#define virt_to_bus virt_to_phys + +extern unsigned char _inb(unsigned long); +extern unsigned short _inw(unsigned long); +extern unsigned long _inl(unsigned long); +extern unsigned char _inb_p(unsigned long); +extern unsigned short _inw_p(unsigned long); +extern unsigned long _inl_p(unsigned long); +extern void _outb(unsigned char, unsigned long); +extern void _outw(unsigned short, unsigned long); +extern void _outl(unsigned long, unsigned long); +extern void _outb_p(unsigned char, unsigned long); +extern void _outw_p(unsigned short, unsigned long); +extern void _outl_p(unsigned long, unsigned long); +extern void _insb(unsigned int, void *, unsigned long); +extern void _insw(unsigned int, void *, unsigned long); +extern void _insl(unsigned int, void *, unsigned long); +extern void _outsb(unsigned int, const void *, unsigned long); +extern void _outsw(unsigned int, const void *, unsigned long); +extern void _outsl(unsigned int, const void *, unsigned long); + +static inline unsigned char _readb(unsigned long addr) +{ + return *(volatile unsigned char __force *)addr; +} + +static inline unsigned short _readw(unsigned long addr) +{ + return *(volatile unsigned short __force *)addr; +} + +static inline unsigned long _readl(unsigned long addr) +{ + return *(volatile unsigned long __force *)addr; +} + +static inline void _writeb(unsigned char b, unsigned long addr) +{ + *(volatile unsigned char __force *)addr = b; +} + +static inline void _writew(unsigned short w, unsigned long addr) +{ + *(volatile unsigned short __force *)addr = w; +} + +static inline void _writel(unsigned long l, unsigned long addr) +{ + *(volatile unsigned long __force *)addr = l; +} + +#define inb _inb +#define inw _inw +#define inl _inl +#define outb _outb +#define outw _outw +#define outl _outl + +#define inb_p _inb_p +#define inw_p _inw_p +#define inl_p _inl_p +#define outb_p _outb_p +#define outw_p _outw_p +#define outl_p _outl_p + +#define insb _insb +#define insw _insw +#define insl _insl +#define outsb _outsb +#define outsw _outsw +#define outsl _outsl + +#define readb(addr) _readb((unsigned long)(addr)) +#define readw(addr) _readw((unsigned long)(addr)) +#define readl(addr) _readl((unsigned long)(addr)) +#define __raw_readb readb +#define __raw_readw readw +#define __raw_readl readl +#define readb_relaxed readb +#define readw_relaxed readw +#define readl_relaxed readl + +#define writeb(val, addr) _writeb((val), (unsigned long)(addr)) +#define writew(val, addr) _writew((val), (unsigned long)(addr)) +#define writel(val, addr) _writel((val), (unsigned long)(addr)) +#define __raw_writeb writeb +#define __raw_writew writew +#define __raw_writel writel + +#define mmiowb() + +#define flush_write_buffers() do { } while (0) /* M32R_FIXME */ + +static inline void +memset_io(volatile void __iomem *addr, unsigned char val, int count) +{ + memset((void __force *) addr, val, count); +} + +static inline void +memcpy_fromio(void *dst, volatile void __iomem *src, int count) +{ + memcpy(dst, (void __force *) src, count); +} + +static inline void +memcpy_toio(volatile void __iomem *dst, const void *src, int count) +{ + memcpy((void __force *) dst, src, count); +} + +/* + * 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 + +#endif /* __KERNEL__ */ + +#endif /* _ASM_M32R_IO_H */ |