mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-17 09:14:19 +08:00
181de82ee3
Impact: cleanup, remove dead code
The block layer dropped the virtual merge feature
(b8b3e16cfe).
BIO_VMERGE_BOUNDARY definition is meaningless now.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
111 lines
3.2 KiB
C
111 lines
3.2 KiB
C
#ifndef _ASM_X86_IO_H
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#define _ASM_X86_IO_H
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#define ARCH_HAS_IOREMAP_WC
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#include <linux/compiler.h>
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#include <asm-generic/int-ll64.h>
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#define build_mmio_read(name, size, type, reg, barrier) \
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static inline type name(const volatile void __iomem *addr) \
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{ type ret; asm volatile("mov" size " %1,%0":reg (ret) \
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:"m" (*(volatile type __force *)addr) barrier); return ret; }
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#define build_mmio_write(name, size, type, reg, barrier) \
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static inline void name(type val, volatile void __iomem *addr) \
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{ asm volatile("mov" size " %0,%1": :reg (val), \
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"m" (*(volatile type __force *)addr) barrier); }
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build_mmio_read(readb, "b", unsigned char, "=q", :"memory")
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build_mmio_read(readw, "w", unsigned short, "=r", :"memory")
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build_mmio_read(readl, "l", unsigned int, "=r", :"memory")
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build_mmio_read(__readb, "b", unsigned char, "=q", )
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build_mmio_read(__readw, "w", unsigned short, "=r", )
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build_mmio_read(__readl, "l", unsigned int, "=r", )
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build_mmio_write(writeb, "b", unsigned char, "q", :"memory")
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build_mmio_write(writew, "w", unsigned short, "r", :"memory")
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build_mmio_write(writel, "l", unsigned int, "r", :"memory")
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build_mmio_write(__writeb, "b", unsigned char, "q", )
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build_mmio_write(__writew, "w", unsigned short, "r", )
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build_mmio_write(__writel, "l", unsigned int, "r", )
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#define readb_relaxed(a) __readb(a)
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#define readw_relaxed(a) __readw(a)
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#define readl_relaxed(a) __readl(a)
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#define __raw_readb __readb
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#define __raw_readw __readw
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#define __raw_readl __readl
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#define __raw_writeb __writeb
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#define __raw_writew __writew
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#define __raw_writel __writel
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#define mmiowb() barrier()
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#ifdef CONFIG_X86_64
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build_mmio_read(readq, "q", unsigned long, "=r", :"memory")
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build_mmio_write(writeq, "q", unsigned long, "r", :"memory")
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#else
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static inline __u64 readq(const volatile void __iomem *addr)
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{
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const volatile u32 __iomem *p = addr;
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u32 low, high;
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low = readl(p);
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high = readl(p + 1);
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return low + ((u64)high << 32);
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}
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static inline void writeq(__u64 val, volatile void __iomem *addr)
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{
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writel(val, addr);
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writel(val >> 32, addr+4);
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}
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#endif
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#define readq_relaxed(a) readq(a)
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#define __raw_readq(a) readq(a)
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#define __raw_writeq(val, addr) writeq(val, addr)
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/* Let people know that we have them */
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#define readq readq
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#define writeq writeq
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#ifdef CONFIG_X86_32
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# include "io_32.h"
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#else
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# include "io_64.h"
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#endif
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extern void *xlate_dev_mem_ptr(unsigned long phys);
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extern void unxlate_dev_mem_ptr(unsigned long phys, void *addr);
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extern int ioremap_change_attr(unsigned long vaddr, unsigned long size,
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unsigned long prot_val);
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extern void __iomem *ioremap_wc(unsigned long offset, unsigned long size);
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/*
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* early_ioremap() and early_iounmap() are for temporary early boot-time
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* mappings, before the real ioremap() is functional.
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* A boot-time mapping is currently limited to at most 16 pages.
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*/
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extern void early_ioremap_init(void);
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extern void early_ioremap_clear(void);
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extern void early_ioremap_reset(void);
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extern void __iomem *early_ioremap(unsigned long offset, unsigned long size);
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extern void __iomem *early_memremap(unsigned long offset, unsigned long size);
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extern void early_iounmap(void __iomem *addr, unsigned long size);
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extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
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#endif /* _ASM_X86_IO_H */
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