mirror of
https://github.com/AsahiLinux/u-boot
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a78cd86132
As part of testing booting Linux kernels on Rockchip devices, it was discovered by Ziyuan Xu and Sandy Patterson that we had multiple and for some cases incomplete isb definitions. This was causing a failure to boot of the Linux kernel. In order to solve this problem as well as cover any corner cases that we may also have had a number of changes are made in order to consolidate things. First, <asm/barriers.h> now becomes the source of isb/dsb/dmb definitions. This however introduces another complexity. Due to needing to build SPL for 32bit tegra with -march=armv4 we need to borrow the __LINUX_ARM_ARCH__ logic from the Linux Kernel in a more complete form. Move this from arch/arm/lib/Makefile to arch/arm/Makefile and add a comment about it. Now that we can always know what the target CPU is capable off we can get always do the correct thing for the barrier. The final part of this is that need to be consistent everywhere and call isb()/dsb()/dmb() and NOT call ISB/DSB/DMB in some cases and the function names in others. Reviewed-by: Stephen Warren <swarren@nvidia.com> Tested-by: Stephen Warren <swarren@nvidia.com> Acked-by: Ziyuan Xu <xzy.xu@rock-chips.com> Acked-by: Sandy Patterson <apatterson@sightlogix.com> Reported-by: Ziyuan Xu <xzy.xu@rock-chips.com> Reported-by: Sandy Patterson <apatterson@sightlogix.com> Signed-off-by: Tom Rini <trini@konsulko.com>
431 lines
14 KiB
C
431 lines
14 KiB
C
/*
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* linux/include/asm-arm/io.h
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*
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* Copyright (C) 1996-2000 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Modifications:
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* 16-Sep-1996 RMK Inlined the inx/outx functions & optimised for both
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* constant addresses and variable addresses.
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* 04-Dec-1997 RMK Moved a lot of this stuff to the new architecture
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* specific IO header files.
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* 27-Mar-1999 PJB Second parameter of memcpy_toio is const..
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* 04-Apr-1999 PJB Added check_signature.
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* 12-Dec-1999 RMK More cleanups
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* 18-Jun-2000 RMK Removed virt_to_* and friends definitions
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*/
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#ifndef __ASM_ARM_IO_H
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#define __ASM_ARM_IO_H
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#ifdef __KERNEL__
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#include <linux/types.h>
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#include <asm/byteorder.h>
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#include <asm/memory.h>
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#include <asm/barriers.h>
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#if 0 /* XXX###XXX */
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#include <asm/arch/hardware.h>
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#endif /* XXX###XXX */
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static inline void sync(void)
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{
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}
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/*
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* Given a physical address and a length, return a virtual address
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* that can be used to access the memory range with the caching
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* properties specified by "flags".
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*/
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#define MAP_NOCACHE (0)
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#define MAP_WRCOMBINE (0)
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#define MAP_WRBACK (0)
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#define MAP_WRTHROUGH (0)
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static inline void *
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map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
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{
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return (void *)((unsigned long)paddr);
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}
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/*
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* Take down a mapping set up by map_physmem().
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*/
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static inline void unmap_physmem(void *vaddr, unsigned long flags)
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{
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}
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static inline phys_addr_t virt_to_phys(void * vaddr)
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{
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return (phys_addr_t)((unsigned long)vaddr);
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}
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/*
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* Generic virtual read/write. Note that we don't support half-word
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* read/writes. We define __arch_*[bl] here, and leave __arch_*w
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* to the architecture specific code.
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*/
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#define __arch_getb(a) (*(volatile unsigned char *)(a))
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#define __arch_getw(a) (*(volatile unsigned short *)(a))
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#define __arch_getl(a) (*(volatile unsigned int *)(a))
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#define __arch_getq(a) (*(volatile unsigned long long *)(a))
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#define __arch_putb(v,a) (*(volatile unsigned char *)(a) = (v))
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#define __arch_putw(v,a) (*(volatile unsigned short *)(a) = (v))
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#define __arch_putl(v,a) (*(volatile unsigned int *)(a) = (v))
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#define __arch_putq(v,a) (*(volatile unsigned long long *)(a) = (v))
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static inline void __raw_writesb(unsigned long addr, const void *data,
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int bytelen)
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{
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uint8_t *buf = (uint8_t *)data;
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while(bytelen--)
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__arch_putb(*buf++, addr);
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}
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static inline void __raw_writesw(unsigned long addr, const void *data,
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int wordlen)
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{
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uint16_t *buf = (uint16_t *)data;
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while(wordlen--)
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__arch_putw(*buf++, addr);
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}
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static inline void __raw_writesl(unsigned long addr, const void *data,
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int longlen)
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{
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uint32_t *buf = (uint32_t *)data;
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while(longlen--)
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__arch_putl(*buf++, addr);
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}
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static inline void __raw_readsb(unsigned long addr, void *data, int bytelen)
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{
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uint8_t *buf = (uint8_t *)data;
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while(bytelen--)
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*buf++ = __arch_getb(addr);
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}
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static inline void __raw_readsw(unsigned long addr, void *data, int wordlen)
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{
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uint16_t *buf = (uint16_t *)data;
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while(wordlen--)
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*buf++ = __arch_getw(addr);
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}
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static inline void __raw_readsl(unsigned long addr, void *data, int longlen)
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{
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uint32_t *buf = (uint32_t *)data;
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while(longlen--)
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*buf++ = __arch_getl(addr);
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}
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#define __raw_writeb(v,a) __arch_putb(v,a)
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#define __raw_writew(v,a) __arch_putw(v,a)
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#define __raw_writel(v,a) __arch_putl(v,a)
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#define __raw_writeq(v,a) __arch_putq(v,a)
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#define __raw_readb(a) __arch_getb(a)
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#define __raw_readw(a) __arch_getw(a)
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#define __raw_readl(a) __arch_getl(a)
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#define __raw_readq(a) __arch_getq(a)
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/*
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* TODO: The kernel offers some more advanced versions of barriers, it might
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* have some advantages to use them instead of the simple one here.
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*/
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#define mb() dsb()
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#define __iormb() dmb()
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#define __iowmb() dmb()
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#define writeb(v,c) ({ u8 __v = v; __iowmb(); __arch_putb(__v,c); __v; })
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#define writew(v,c) ({ u16 __v = v; __iowmb(); __arch_putw(__v,c); __v; })
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#define writel(v,c) ({ u32 __v = v; __iowmb(); __arch_putl(__v,c); __v; })
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#define writeq(v,c) ({ u64 __v = v; __iowmb(); __arch_putq(__v,c); __v; })
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#define readb(c) ({ u8 __v = __arch_getb(c); __iormb(); __v; })
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#define readw(c) ({ u16 __v = __arch_getw(c); __iormb(); __v; })
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#define readl(c) ({ u32 __v = __arch_getl(c); __iormb(); __v; })
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#define readq(c) ({ u64 __v = __arch_getq(c); __iormb(); __v; })
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/*
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* The compiler seems to be incapable of optimising constants
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* properly. Spell it out to the compiler in some cases.
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* These are only valid for small values of "off" (< 1<<12)
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*/
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#define __raw_base_writeb(val,base,off) __arch_base_putb(val,base,off)
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#define __raw_base_writew(val,base,off) __arch_base_putw(val,base,off)
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#define __raw_base_writel(val,base,off) __arch_base_putl(val,base,off)
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#define __raw_base_readb(base,off) __arch_base_getb(base,off)
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#define __raw_base_readw(base,off) __arch_base_getw(base,off)
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#define __raw_base_readl(base,off) __arch_base_getl(base,off)
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/*
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* Clear and set bits in one shot. These macros can be used to clear and
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* set multiple bits in a register using a single call. These macros can
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* also be used to set a multiple-bit bit pattern using a mask, by
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* specifying the mask in the 'clear' parameter and the new bit pattern
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* in the 'set' parameter.
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*/
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#define out_arch(type,endian,a,v) __raw_write##type(cpu_to_##endian(v),a)
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#define in_arch(type,endian,a) endian##_to_cpu(__raw_read##type(a))
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#define out_le64(a,v) out_arch(q,le64,a,v)
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#define out_le32(a,v) out_arch(l,le32,a,v)
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#define out_le16(a,v) out_arch(w,le16,a,v)
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#define in_le64(a) in_arch(q,le64,a)
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#define in_le32(a) in_arch(l,le32,a)
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#define in_le16(a) in_arch(w,le16,a)
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#define out_be32(a,v) out_arch(l,be32,a,v)
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#define out_be16(a,v) out_arch(w,be16,a,v)
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#define in_be32(a) in_arch(l,be32,a)
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#define in_be16(a) in_arch(w,be16,a)
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#define out_8(a,v) __raw_writeb(v,a)
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#define in_8(a) __raw_readb(a)
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#define clrbits(type, addr, clear) \
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out_##type((addr), in_##type(addr) & ~(clear))
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#define setbits(type, addr, set) \
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out_##type((addr), in_##type(addr) | (set))
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#define clrsetbits(type, addr, clear, set) \
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out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
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#define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
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#define setbits_be32(addr, set) setbits(be32, addr, set)
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#define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
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#define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
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#define setbits_le32(addr, set) setbits(le32, addr, set)
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#define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
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#define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
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#define setbits_be16(addr, set) setbits(be16, addr, set)
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#define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
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#define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
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#define setbits_le16(addr, set) setbits(le16, addr, set)
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#define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
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#define clrbits_8(addr, clear) clrbits(8, addr, clear)
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#define setbits_8(addr, set) setbits(8, addr, set)
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#define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
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/*
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* Now, pick up the machine-defined IO definitions
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*/
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#if 0 /* XXX###XXX */
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#include <asm/arch/io.h>
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#endif /* XXX###XXX */
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/*
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* IO port access primitives
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* -------------------------
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*
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* The ARM doesn't have special IO access instructions; all IO is memory
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* mapped. Note that these are defined to perform little endian accesses
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* only. Their primary purpose is to access PCI and ISA peripherals.
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*
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* Note that for a big endian machine, this implies that the following
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* big endian mode connectivity is in place, as described by numerous
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* ARM documents:
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*
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* PCI: D0-D7 D8-D15 D16-D23 D24-D31
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* ARM: D24-D31 D16-D23 D8-D15 D0-D7
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*
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* The machine specific io.h include defines __io to translate an "IO"
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* address to a memory address.
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*
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* Note that we prevent GCC re-ordering or caching values in expressions
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* by introducing sequence points into the in*() definitions. Note that
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* __raw_* do not guarantee this behaviour.
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*
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* The {in,out}[bwl] macros are for emulating x86-style PCI/ISA IO space.
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*/
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#ifdef __io
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#define outb(v,p) __raw_writeb(v,__io(p))
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#define outw(v,p) __raw_writew(cpu_to_le16(v),__io(p))
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#define outl(v,p) __raw_writel(cpu_to_le32(v),__io(p))
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#define inb(p) ({ unsigned int __v = __raw_readb(__io(p)); __v; })
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#define inw(p) ({ unsigned int __v = le16_to_cpu(__raw_readw(__io(p))); __v; })
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#define inl(p) ({ unsigned int __v = le32_to_cpu(__raw_readl(__io(p))); __v; })
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#define outsb(p,d,l) __raw_writesb(__io(p),d,l)
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#define outsw(p,d,l) __raw_writesw(__io(p),d,l)
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#define outsl(p,d,l) __raw_writesl(__io(p),d,l)
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#define insb(p,d,l) __raw_readsb(__io(p),d,l)
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#define insw(p,d,l) __raw_readsw(__io(p),d,l)
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#define insl(p,d,l) __raw_readsl(__io(p),d,l)
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#endif
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#define outb_p(val,port) outb((val),(port))
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#define outw_p(val,port) outw((val),(port))
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#define outl_p(val,port) outl((val),(port))
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#define inb_p(port) inb((port))
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#define inw_p(port) inw((port))
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#define inl_p(port) inl((port))
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#define outsb_p(port,from,len) outsb(port,from,len)
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#define outsw_p(port,from,len) outsw(port,from,len)
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#define outsl_p(port,from,len) outsl(port,from,len)
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#define insb_p(port,to,len) insb(port,to,len)
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#define insw_p(port,to,len) insw(port,to,len)
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#define insl_p(port,to,len) insl(port,to,len)
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#define writesl(a, d, s) __raw_writesl((unsigned long)a, d, s)
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#define readsl(a, d, s) __raw_readsl((unsigned long)a, d, s)
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#define writesw(a, d, s) __raw_writesw((unsigned long)a, d, s)
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#define readsw(a, d, s) __raw_readsw((unsigned long)a, d, s)
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#define writesb(a, d, s) __raw_writesb((unsigned long)a, d, s)
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#define readsb(a, d, s) __raw_readsb((unsigned long)a, d, s)
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/*
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* DMA-consistent mapping functions. These allocate/free a region of
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* uncached, unwrite-buffered mapped memory space for use with DMA
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* devices. This is the "generic" version. The PCI specific version
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* is in pci.h
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*/
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extern void *consistent_alloc(int gfp, size_t size, dma_addr_t *handle);
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extern void consistent_free(void *vaddr, size_t size, dma_addr_t handle);
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extern void consistent_sync(void *vaddr, size_t size, int rw);
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/*
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* String version of IO memory access ops:
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*/
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extern void _memcpy_fromio(void *, unsigned long, size_t);
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extern void _memcpy_toio(unsigned long, const void *, size_t);
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extern void _memset_io(unsigned long, int, size_t);
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extern void __readwrite_bug(const char *fn);
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/*
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* If this architecture has PCI memory IO, then define the read/write
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* macros. These should only be used with the cookie passed from
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* ioremap.
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*/
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#ifdef __mem_pci
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#define readb(c) ({ unsigned int __v = __raw_readb(__mem_pci(c)); __v; })
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#define readw(c) ({ unsigned int __v = le16_to_cpu(__raw_readw(__mem_pci(c))); __v; })
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#define readl(c) ({ unsigned int __v = le32_to_cpu(__raw_readl(__mem_pci(c))); __v; })
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#define writeb(v,c) __raw_writeb(v,__mem_pci(c))
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#define writew(v,c) __raw_writew(cpu_to_le16(v),__mem_pci(c))
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#define writel(v,c) __raw_writel(cpu_to_le32(v),__mem_pci(c))
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#define memset_io(c,v,l) _memset_io(__mem_pci(c),(v),(l))
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#define memcpy_fromio(a,c,l) _memcpy_fromio((a),__mem_pci(c),(l))
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#define memcpy_toio(c,a,l) _memcpy_toio(__mem_pci(c),(a),(l))
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#define eth_io_copy_and_sum(s,c,l,b) \
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eth_copy_and_sum((s),__mem_pci(c),(l),(b))
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static inline int
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check_signature(unsigned long io_addr, const unsigned char *signature,
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int length)
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{
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int retval = 0;
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do {
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if (readb(io_addr) != *signature)
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goto out;
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io_addr++;
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signature++;
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length--;
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} while (length);
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retval = 1;
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out:
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return retval;
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}
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#else
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#define memset_io(a, b, c) memset((void *)(a), (b), (c))
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#define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c))
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#define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c))
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#if !defined(readb)
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#define readb(addr) (__readwrite_bug("readb"),0)
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#define readw(addr) (__readwrite_bug("readw"),0)
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#define readl(addr) (__readwrite_bug("readl"),0)
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#define writeb(v,addr) __readwrite_bug("writeb")
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#define writew(v,addr) __readwrite_bug("writew")
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#define writel(v,addr) __readwrite_bug("writel")
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#define eth_io_copy_and_sum(a,b,c,d) __readwrite_bug("eth_io_copy_and_sum")
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#define check_signature(io,sig,len) (0)
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#endif
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#endif /* __mem_pci */
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/*
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* If this architecture has ISA IO, then define the isa_read/isa_write
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* macros.
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*/
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#ifdef __mem_isa
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#define isa_readb(addr) __raw_readb(__mem_isa(addr))
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#define isa_readw(addr) __raw_readw(__mem_isa(addr))
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#define isa_readl(addr) __raw_readl(__mem_isa(addr))
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#define isa_writeb(val,addr) __raw_writeb(val,__mem_isa(addr))
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#define isa_writew(val,addr) __raw_writew(val,__mem_isa(addr))
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#define isa_writel(val,addr) __raw_writel(val,__mem_isa(addr))
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#define isa_memset_io(a,b,c) _memset_io(__mem_isa(a),(b),(c))
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#define isa_memcpy_fromio(a,b,c) _memcpy_fromio((a),__mem_isa(b),(c))
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#define isa_memcpy_toio(a,b,c) _memcpy_toio(__mem_isa((a)),(b),(c))
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#define isa_eth_io_copy_and_sum(a,b,c,d) \
|
|
eth_copy_and_sum((a),__mem_isa(b),(c),(d))
|
|
|
|
static inline int
|
|
isa_check_signature(unsigned long io_addr, const unsigned char *signature,
|
|
int length)
|
|
{
|
|
int retval = 0;
|
|
do {
|
|
if (isa_readb(io_addr) != *signature)
|
|
goto out;
|
|
io_addr++;
|
|
signature++;
|
|
length--;
|
|
} while (length);
|
|
retval = 1;
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
#else /* __mem_isa */
|
|
|
|
#define isa_readb(addr) (__readwrite_bug("isa_readb"),0)
|
|
#define isa_readw(addr) (__readwrite_bug("isa_readw"),0)
|
|
#define isa_readl(addr) (__readwrite_bug("isa_readl"),0)
|
|
#define isa_writeb(val,addr) __readwrite_bug("isa_writeb")
|
|
#define isa_writew(val,addr) __readwrite_bug("isa_writew")
|
|
#define isa_writel(val,addr) __readwrite_bug("isa_writel")
|
|
#define isa_memset_io(a,b,c) __readwrite_bug("isa_memset_io")
|
|
#define isa_memcpy_fromio(a,b,c) __readwrite_bug("isa_memcpy_fromio")
|
|
#define isa_memcpy_toio(a,b,c) __readwrite_bug("isa_memcpy_toio")
|
|
|
|
#define isa_eth_io_copy_and_sum(a,b,c,d) \
|
|
__readwrite_bug("isa_eth_io_copy_and_sum")
|
|
|
|
#define isa_check_signature(io,sig,len) (0)
|
|
|
|
#endif /* __mem_isa */
|
|
#endif /* __KERNEL__ */
|
|
|
|
#include <iotrace.h>
|
|
|
|
#endif /* __ASM_ARM_IO_H */
|