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Diffstat (limited to 'arch/sh/include/asm/io.h')
| -rw-r--r-- | arch/sh/include/asm/io.h | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h new file mode 100644 index 0000000..ca598a6 --- /dev/null +++ b/arch/sh/include/asm/io.h @@ -0,0 +1,270 @@ +/* + * linux/include/asm-sh/io.h + * + * Copyright (C) 1996-2000 Russell King + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Modifications: + * 16-Sep-1996 RMK Inlined the inx/outx functions & optimised for both + * constant addresses and variable addresses. + * 04-Dec-1997 RMK Moved a lot of this stuff to the new architecture + * specific IO header files. + * 27-Mar-1999 PJB Second parameter of memcpy_toio is const.. + * 04-Apr-1999 PJB Added check_signature. + * 12-Dec-1999 RMK More cleanups + * 18-Jun-2000 RMK Removed virt_to_* and friends definitions + */ +#ifndef __ASM_SH_IO_H +#define __ASM_SH_IO_H + +#ifdef __KERNEL__ + +#include <linux/types.h> +#include <asm/byteorder.h> + +/* + * Generic virtual read/write. Note that we don't support half-word + * read/writes. We define __arch_*[bl] here, and leave __arch_*w + * to the architecture specific code. + */ +#define __arch_getb(a) (*(volatile unsigned char *)(a)) +#define __arch_getw(a) (*(volatile unsigned short *)(a)) +#define __arch_getl(a) (*(volatile unsigned int *)(a)) + +#define __arch_putb(v, a) (*(volatile unsigned char *)(a) = (v)) +#define __arch_putw(v, a) (*(volatile unsigned short *)(a) = (v)) +#define __arch_putl(v, a) (*(volatile unsigned int *)(a) = (v)) + +extern void __raw_writesb(unsigned int addr, const void *data, int bytelen); +extern void __raw_writesw(unsigned int addr, const void *data, int wordlen); +extern void __raw_writesl(unsigned int addr, const void *data, int longlen); + +extern void __raw_readsb(unsigned int addr, void *data, int bytelen); +extern void __raw_readsw(unsigned int addr, void *data, int wordlen); +extern void __raw_readsl(unsigned int addr, void *data, int longlen); + +#define __raw_writeb(v, a) __arch_putb(v, a) +#define __raw_writew(v, a) __arch_putw(v, a) +#define __raw_writel(v, a) __arch_putl(v, a) + +#define __raw_readb(a) __arch_getb(a) +#define __raw_readw(a) __arch_getw(a) +#define __raw_readl(a) __arch_getl(a) + +/* + * The compiler seems to be incapable of optimising constants + * properly. Spell it out to the compiler in some cases. + * These are only valid for small values of "off" (< 1<<12) + */ +#define __raw_base_writeb(val, base, off) __arch_base_putb(val, base, off) +#define __raw_base_writew(val, base, off) __arch_base_putw(val, base, off) +#define __raw_base_writel(val, base, off) __arch_base_putl(val, base, off) + +#define __raw_base_readb(base, off) __arch_base_getb(base, off) +#define __raw_base_readw(base, off) __arch_base_getw(base, off) +#define __raw_base_readl(base, off) __arch_base_getl(base, off) + +/* + * Now, pick up the machine-defined IO definitions + */ +#if 0 /* XXX###XXX */ +#include <asm/arch/io.h> +#endif /* XXX###XXX */ + +/* + * IO port access primitives + * ------------------------- + * + * The SH doesn't have special IO access instructions; all IO is memory + * mapped. Note that these are defined to perform little endian accesses + * only. Their primary purpose is to access PCI and ISA peripherals. + * + * The machine specific io.h include defines __io to translate an "IO" + * address to a memory address. + * + * Note that we prevent GCC re-ordering or caching values in expressions + * by introducing sequence points into the in*() definitions. Note that + * __raw_* do not guarantee this behaviour. + * + * The {in,out}[bwl] macros are for emulating x86-style PCI/ISA IO space. + */ +#define outb(v, p) __raw_writeb(v, p) +#define outw(v, p) __raw_writew(cpu_to_le16(v), p) +#define outl(v, p) __raw_writel(cpu_to_le32(v), p) + +#define inb(p) ({ unsigned int __v = __raw_readb(p); __v; }) +#define inw(p) ({ unsigned int __v = __le16_to_cpu(__raw_readw(p)); __v; }) +#define inl(p) ({ unsigned int __v = __le32_to_cpu(__raw_readl(p)); __v; }) + +#define outsb(p, d, l) __raw_writesb(p, d, l) +#define outsw(p, d, l) __raw_writesw(p, d, l) +#define outsl(p, d, l) __raw_writesl(p, d, l) + +#define insb(p, d, l) __raw_readsb(p, d, l) +#define insw(p, d, l) __raw_readsw(p, d, l) +#define insl(p, d, l) __raw_readsl(p, d, l) + +#define outb_p(val, port) outb((val), (port)) +#define outw_p(val, port) outw((val), (port)) +#define outl_p(val, port) outl((val), (port)) +#define inb_p(port) inb((port)) +#define inw_p(port) inw((port)) +#define inl_p(port) inl((port)) + +#define outsb_p(port, from, len) outsb(port, from, len) +#define outsw_p(port, from, len) outsw(port, from, len) +#define outsl_p(port, from, len) outsl(port, from, len) +#define insb_p(port, to, len) insb(port, to, len) +#define insw_p(port, to, len) insw(port, to, len) +#define insl_p(port, to, len) insl(port, to, len) + +/* for U-Boot PCI */ +#define out_8(port, val) outb(val, port) +#define out_le16(port, val) outw(val, port) +#define out_le32(port, val) outl(val, port) +#define in_8(port) inb(port) +#define in_le16(port) inw(port) +#define in_le32(port) inl(port) +/* + * ioremap and friends. + * + * ioremap takes a PCI memory address, as specified in + * linux/Documentation/IO-mapping.txt. If you want a + * physical address, use __ioremap instead. + */ +extern void *__ioremap(unsigned long offset, size_t size, unsigned long flags); +extern void __iounmap(void *addr); + +/* + * Generic ioremap support. + * + * Define: + * iomem_valid_addr(off,size) + * iomem_to_phys(off) + */ +#ifdef iomem_valid_addr +#define __arch_ioremap(off, sz, nocache) \ + ({ \ + unsigned long _off = (off), _size = (sz); \ + void *_ret = (void *)0; \ + if (iomem_valid_addr(_off, _size)) \ + _ret = __ioremap(iomem_to_phys(_off), _size, 0); \ + _ret; \ + }) + +#define __arch_iounmap __iounmap +#endif + +#define ioremap(off, sz) __arch_ioremap((off), (sz), 0) +#define ioremap_nocache(off, sz) __arch_ioremap((off), (sz), 1) +#define iounmap(_addr) __arch_iounmap(_addr) + +/* + * DMA-consistent mapping functions. These allocate/free a region of + * uncached, unwrite-buffered mapped memory space for use with DMA + * devices. This is the "generic" version. The PCI specific version + * is in pci.h + */ +extern void *consistent_alloc(int gfp, size_t size, dma_addr_t *handle); +extern void consistent_free(void *vaddr, size_t size, dma_addr_t handle); +extern void consistent_sync(void *vaddr, size_t size, int rw); + +/* + * String version of IO memory access ops: + */ +extern void _memcpy_fromio(void *, unsigned long, size_t); +extern void _memcpy_toio(unsigned long, const void *, size_t); +extern void _memset_io(unsigned long, int, size_t); + +/* + * If this architecture has PCI memory IO, then define the read/write + * macros. These should only be used with the cookie passed from + * ioremap. + */ +#ifdef __mem_pci + +#define readb(c) ({ unsigned int __v = __raw_readb(__mem_pci(c)); __v; }) +#define readw(c)\ + ({ unsigned int __v = le16_to_cpu(__raw_readw(__mem_pci(c))); __v; }) +#define readl(c)\ + ({ unsigned int __v = le32_to_cpu(__raw_readl(__mem_pci(c))); __v; }) + +#define writeb(v, c) __raw_writeb(v, __mem_pci(c)) +#define writew(v, c) __raw_writew(cpu_to_le16(v), __mem_pci(c)) +#define writel(v, c) __raw_writel(cpu_to_le32(v), __mem_pci(c)) + +#define memset_io(c, v, l) _memset_io(__mem_pci(c), (v), (l)) +#define memcpy_fromio(a, c, l) _memcpy_fromio((a), __mem_pci(c), (l)) +#define memcpy_toio(c, a, l) _memcpy_toio(__mem_pci(c), (a), (l)) + +#define eth_io_copy_and_sum(s, c, l, b) \ + eth_copy_and_sum((s), __mem_pci(c), (l), (b)) + +static inline int +check_signature(unsigned long io_addr, const unsigned char *signature, + int length) +{ + int retval = 0; + do { + if (readb(io_addr) != *signature) + goto out; + io_addr++; + signature++; + length--; + } while (length); + retval = 1; +out: + return retval; +} + +#elif !defined(readb) + +#define readb(addr) __raw_readb(addr) +#define readw(addr) __raw_readw(addr) +#define readl(addr) __raw_readl(addr) +#define writeb(v, addr) __raw_writeb(v, addr) +#define writew(v, addr) __raw_writew(v, addr) +#define writel(v, addr) __raw_writel(v, addr) + +#define check_signature(io, sig, len) (0) + +#endif /* __mem_pci */ + +static inline void sync(void) +{ +} + +/* + * Given a physical address and a length, return a virtual address + * that can be used to access the memory range with the caching + * properties specified by "flags". + */ +#define MAP_NOCACHE (0) +#define MAP_WRCOMBINE (0) +#define MAP_WRBACK (0) +#define MAP_WRTHROUGH (0) + +static inline void * +map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) +{ + return (void *)paddr; +} + +/* + * Take down a mapping set up by map_physmem(). + */ +static inline void unmap_physmem(void *vaddr, unsigned long flags) +{ + +} + +static inline phys_addr_t virt_to_phys(void * vaddr) +{ + return (phys_addr_t)(vaddr); +} + +#endif /* __KERNEL__ */ +#endif /* __ASM_SH_IO_H */ |