Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932272AbZD3PoR (ORCPT ); Thu, 30 Apr 2009 11:44:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932416AbZD3PmL (ORCPT ); Thu, 30 Apr 2009 11:42:11 -0400 Received: from moutng.kundenserver.de ([212.227.126.187]:60936 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932212AbZD3PmB (ORCPT ); Thu, 30 Apr 2009 11:42:01 -0400 Message-Id: <19d8a91dbf3456f9eb0b0bb2f92b302b88a1c672.1241105648.git.arnd@arndb.de> In-Reply-To: References: From: Arnd Bergmann Date: Thu, 6 Nov 2008 14:38:22 +0100 Subject: [PATCH 05/27] asm-generic: add generic io.h Cc: linux-arch@vger.kernel.org, Michal Simek , Remis Lima Baima , linux-kernel@vger.kernel.org X-Provags-ID: V01U2FsdGVkX19/nSqLP7FlpV75IcQL/IunwKW8GArPRc94Bxc D8V2n7LRfezNMUEoyJmua3HiXgj2uSBuUZG0wqYlnW407cfWBn SIrqUvZb+uGT/d+y0ccwA== To: unlisted-recipients:; (no To-header on input) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 8411 Lines: 334 Architectures that only have strictly ordered memory mapped I/O can use a very simple asm/io.h implementation, which was first written for the mn10300 architecture. Make it generic, so that future architectures can use it directly. Signed-off-by: Arnd Bergmann Signed-off-by: Remis Lima Baima --- include/asm-generic/io.h | 305 ++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 305 insertions(+), 0 deletions(-) create mode 100644 include/asm-generic/io.h diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h new file mode 100644 index 0000000..8377715 --- /dev/null +++ b/include/asm-generic/io.h @@ -0,0 +1,305 @@ +/* Generic I/O port emulation, based on MN10300 code + * + * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public Licence + * as published by the Free Software Foundation; either version + * 2 of the Licence, or (at your option) any later version. + */ +#ifndef __ASM_GENERIC_IO_H +#define __ASM_GENERIC_IO_H + +#include /* I/O is all done through memory accesses */ +#include + +#ifdef CONFIG_GENERIC_IOMAP +#include +#endif + +#define mmiowb() do {} while (0) + +/*****************************************************************************/ +/* + * readX/writeX() are used to access memory mapped devices. On some + * architectures the memory mapped IO stuff needs to be accessed + * differently. On the simple architectures, we just read/write the + * memory location directly. + */ +static inline u8 __raw_readb(const volatile void __iomem *addr) +{ + return *(const volatile u8 *) addr; +} + +static inline u16 __raw_readw(const volatile void __iomem *addr) +{ + return *(const volatile u16 *) addr; +} + +static inline u32 __raw_readl(const volatile void __iomem *addr) +{ + return *(const volatile u32 *) addr; +} + +#define readb __raw_readb +#define readw(addr) __le16_to_cpu(__raw_readw(addr)) +#define readl(addr) __le32_to_cpu(__raw_readl(addr)) + +static inline void __raw_writeb(u8 b, volatile void __iomem *addr) +{ + *(volatile u8 *) addr = b; +} + +static inline void __raw_writew(u16 b, volatile void __iomem *addr) +{ + *(volatile u16 *) addr = b; +} + +static inline void __raw_writel(u32 b, volatile void __iomem *addr) +{ + *(volatile u32 *) addr = b; +} + +#define writeb __raw_writeb +#define writew(b,addr) __raw_writew(__cpu_to_le16(b),addr) +#define writel(b,addr) __raw_writel(__cpu_to_le32(b),addr) + +#ifdef CONFIG_64BIT +static inline u64 __raw_readq(const volatile void __iomem *addr) +{ + return *(const volatile u64 *) addr; +} +#define readq(addr) __le64_to_cpu(__raw_readq(addr)) + +static inline void __raw_writeq(u64 b, volatile void __iomem *addr) +{ + *(volatile u64 *) addr = b; +} +#define writeq(b,addr) __raw_writeq(__cpu_to_le64(b),addr) +#endif + +/*****************************************************************************/ +/* + * traditional input/output functions + */ + +static inline u8 inb(unsigned long addr) +{ + return readb((volatile void __iomem *) addr); +} + +static inline u16 inw(unsigned long addr) +{ + return readw((volatile void __iomem *) addr); +} + +static inline u32 inl(unsigned long addr) +{ + return readl((volatile void __iomem *) addr); +} + +static inline void outb(u8 b, unsigned long addr) +{ + return writeb(b, (volatile void __iomem *) addr); +} + +static inline void outw(u16 b, unsigned long addr) +{ + return writew(b, (volatile void __iomem *) addr); +} + +static inline void outl(u32 b, unsigned long addr) +{ + return writel(b, (volatile void __iomem *) addr); +} + +#define inb_p(addr) inb(addr) +#define inw_p(addr) inw(addr) +#define inl_p(addr) inl(addr) +#define outb_p(x, addr) outb((x), (addr)) +#define outw_p(x, addr) outw((x), (addr)) +#define outl_p(x, addr) outl((x), (addr)) + +static inline void insb(unsigned long addr, void *buffer, int count) +{ + if (count) { + u8 *buf = buffer; + do { + u8 x = inb(addr); + *buf++ = x; + } while (--count); + } +} + +static inline void insw(unsigned long addr, void *buffer, int count) +{ + if (count) { + u16 *buf = buffer; + do { + u16 x = inw(addr); + *buf++ = x; + } while (--count); + } +} + +static inline void insl(unsigned long addr, void *buffer, int count) +{ + if (count) { + u32 *buf = buffer; + do { + u32 x = inl(addr); + *buf++ = x; + } while (--count); + } +} + +static inline void outsb(unsigned long addr, const void *buffer, int count) +{ + if (count) { + const u8 *buf = buffer; + do { + outb(*buf++, addr); + } while (--count); + } +} + +static inline void outsw(unsigned long addr, const void *buffer, int count) +{ + if (count) { + const u16 *buf = buffer; + do { + outw(*buf++, addr); + } while (--count); + } +} + +static inline void outsl(unsigned long addr, const void *buffer, int count) +{ + if (count) { + const u32 *buf = buffer; + do { + outl(*buf++, addr); + } while (--count); + } +} + +#ifndef CONFIG_GENERIC_IOMAP +#define ioread8(addr) readb(addr) +#define ioread16(addr) readw(addr) +#define ioread32(addr) readl(addr) + +#define iowrite8(v, addr) writeb((v), (addr)) +#define iowrite16(v, addr) writew((v), (addr)) +#define iowrite32(v, addr) writel((v), (addr)) + +#define ioread8_rep(p, dst, count) \ + insb((unsigned long) (p), (dst), (count)) +#define ioread16_rep(p, dst, count) \ + insw((unsigned long) (p), (dst), (count)) +#define ioread32_rep(p, dst, count) \ + insl((unsigned long) (p), (dst), (count)) + +#define iowrite8_rep(p, src, count) \ + outsb((unsigned long) (p), (src), (count)) +#define iowrite16_rep(p, src, count) \ + outsw((unsigned long) (p), (src), (count)) +#define iowrite32_rep(p, src, count) \ + outsl((unsigned long) (p), (src), (count)) +#endif /* CONFIG_GENERIC_IOMAP */ + + +#define IO_SPACE_LIMIT 0xffffffff + +#ifdef __KERNEL__ + +#include +#define __io_virt(x) ((void *) (x)) + +#ifndef CONFIG_GENERIC_IOMAP +/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */ +struct pci_dev; +extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max); +static inline void pci_iounmap(struct pci_dev *dev, void __iomem *p) +{ +} +#endif /* CONFIG_GENERIC_IOMAP */ + +/* + * Change virtual addresses to physical addresses and vv. + * These are pretty trivial + */ +static inline unsigned long virt_to_phys(volatile void *address) +{ + return __pa(address); +} + +static inline void *phys_to_virt(unsigned long address) +{ + return __va(address); +} + +/* + * Change "struct page" to physical address. + */ +static inline void *__ioremap(unsigned long offset, unsigned long size, + unsigned long flags) +{ + return (void *) offset; +} + +static inline void *ioremap(unsigned long offset, unsigned long size) +{ + return (void *) offset; +} + +#ifndef ioremap_nocache +#define ioremap_nocache ioremap +#endif + +#ifndef ioremap_wc +#define ioremap_wc ioremap_nocache +#endif + +static inline void iounmap(void *addr) +{ +} + +#ifndef CONFIG_GENERIC_IOMAP +static inline void __iomem *ioport_map(unsigned long port, unsigned int nr) +{ + return (void __iomem *) port; +} + +static inline void ioport_unmap(void __iomem *p) +{ +} +#else /* CONFIG_GENERIC_IOMAP */ +extern void __iomem *ioport_map(unsigned long port, unsigned int nr); +extern void ioport_unmap(void __iomem *p); +#endif /* CONFIG_GENERIC_IOMAP */ + +#define xlate_dev_kmem_ptr(p) ((void *) (p)) +#define xlate_dev_mem_ptr(p) ((void *) (p)) + +#ifndef virt_to_bus +static inline unsigned long virt_to_bus(volatile void *address) +{ + return ((unsigned long) address); +} + +static inline void *bus_to_virt(unsigned long address) +{ + return (void *) address; +} +#endif + +#define page_to_bus page_to_phys + +#define memset_io(a, b, c) memset(__io_virt(a), (b), (c)) +#define memcpy_fromio(a, b, c) memcpy((a), __io_virt(b), (c)) +#define memcpy_toio(a, b, c) memcpy(__io_virt(a), (b), (c)) + +#endif /* __KERNEL__ */ + +#endif /* __ASM_GENERIC_IO_H */ -- 1.5.6.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/