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Diffstat (limited to 'arch/arm/mach-ixp2000/include/mach/io.h')
| -rw-r--r-- | arch/arm/mach-ixp2000/include/mach/io.h | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/arch/arm/mach-ixp2000/include/mach/io.h b/arch/arm/mach-ixp2000/include/mach/io.h new file mode 100644 index 000000000000..859e584914d9 --- /dev/null +++ b/arch/arm/mach-ixp2000/include/mach/io.h @@ -0,0 +1,134 @@ +/* + * arch/arm/mach-ixp2000/include/mach/io.h + * + * Original Author: Naeem M Afzal <naeem.m.afzal@intel.com> + * Maintainer: Deepak Saxena <dsaxena@plexity.net> + * + * Copyright (C) 2002 Intel Corp. + * Copyrgiht (C) 2003-2004 MontaVista Software, Inc. + * + * 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. + */ + +#ifndef __ASM_ARM_ARCH_IO_H +#define __ASM_ARM_ARCH_IO_H + +#include <mach/hardware.h> + +#define IO_SPACE_LIMIT 0xffffffff +#define __mem_pci(a) (a) + +/* + * The A? revisions of the IXP2000s assert byte lanes for PCI I/O + * transactions the other way round (MEM transactions don't have this + * issue), so if we want to support those models, we need to override + * the standard I/O functions. + * + * B0 and later have a bit that can be set to 1 to get the proper + * behavior for I/O transactions, which then allows us to use the + * standard I/O functions. This is what we do if the user does not + * explicitly ask for support for pre-B0. + */ +#ifdef CONFIG_IXP2000_SUPPORT_BROKEN_PCI_IO +#define ___io(p) ((void __iomem *)((p)+IXP2000_PCI_IO_VIRT_BASE)) + +#define alignb(addr) (void __iomem *)((unsigned long)(addr) ^ 3) +#define alignw(addr) (void __iomem *)((unsigned long)(addr) ^ 2) + +#define outb(v,p) __raw_writeb((v),alignb(___io(p))) +#define outw(v,p) __raw_writew((v),alignw(___io(p))) +#define outl(v,p) __raw_writel((v),___io(p)) + +#define inb(p) ({ unsigned int __v = __raw_readb(alignb(___io(p))); __v; }) +#define inw(p) \ + ({ unsigned int __v = (__raw_readw(alignw(___io(p)))); __v; }) +#define inl(p) \ + ({ unsigned int __v = (__raw_readl(___io(p))); __v; }) + +#define outsb(p,d,l) __raw_writesb(alignb(___io(p)),d,l) +#define outsw(p,d,l) __raw_writesw(alignw(___io(p)),d,l) +#define outsl(p,d,l) __raw_writesl(___io(p),d,l) + +#define insb(p,d,l) __raw_readsb(alignb(___io(p)),d,l) +#define insw(p,d,l) __raw_readsw(alignw(___io(p)),d,l) +#define insl(p,d,l) __raw_readsl(___io(p),d,l) + +#define __is_io_address(p) ((((unsigned long)(p)) & ~(IXP2000_PCI_IO_SIZE - 1)) == IXP2000_PCI_IO_VIRT_BASE) + +#define ioread8(p) \ + ({ \ + unsigned int __v; \ + \ + if (__is_io_address(p)) { \ + __v = __raw_readb(alignb(p)); \ + } else { \ + __v = __raw_readb(p); \ + } \ + \ + __v; \ + }) \ + +#define ioread16(p) \ + ({ \ + unsigned int __v; \ + \ + if (__is_io_address(p)) { \ + __v = __raw_readw(alignw(p)); \ + } else { \ + __v = le16_to_cpu(__raw_readw(p)); \ + } \ + \ + __v; \ + }) + +#define ioread32(p) \ + ({ \ + unsigned int __v; \ + \ + if (__is_io_address(p)) { \ + __v = __raw_readl(p); \ + } else { \ + __v = le32_to_cpu(__raw_readl(p)); \ + } \ + \ + __v; \ + }) + +#define iowrite8(v,p) \ + ({ \ + if (__is_io_address(p)) { \ + __raw_writeb((v), alignb(p)); \ + } else { \ + __raw_writeb((v), p); \ + } \ + }) + +#define iowrite16(v,p) \ + ({ \ + if (__is_io_address(p)) { \ + __raw_writew((v), alignw(p)); \ + } else { \ + __raw_writew(cpu_to_le16(v), p); \ + } \ + }) + +#define iowrite32(v,p) \ + ({ \ + if (__is_io_address(p)) { \ + __raw_writel((v), p); \ + } else { \ + __raw_writel(cpu_to_le32(v), p); \ + } \ + }) + +#define ioport_map(port, nr) ___io(port) + +#define ioport_unmap(addr) +#else +#define __io(p) ((void __iomem *)((p)+IXP2000_PCI_IO_VIRT_BASE)) +#endif + + +#endif |
