forked from Minki/linux
1c5b0eb66d
Building 2.6.27-rc1 on x86 with gcc-3.2.3 fails with:
In file included from include/asm/dma.h:12,
from include/linux/bootmem.h:8,
from init/main.c:26:
include/asm/io.h: In function `readb':
include/asm/io.h:32: syntax error before string constant
include/asm/io.h: In function `readw':
include/asm/io.h:33: syntax error before string constant
include/asm/io.h: In function `readl':
include/asm/io.h:34: syntax error before string constant
include/asm/io.h: In function `__readb':
include/asm/io.h:36: syntax error before string constant
include/asm/io.h: In function `__readw':
include/asm/io.h:37: syntax error before string constant
include/asm/io.h: In function `__readl':
include/asm/io.h:38: syntax error before string constant
make[1]: *** [init/main.o] Error 1
make: *** [init] Error 2
Starting with 2.6.27-rc1 readb() et al are generated by a
build_mmio_read() macro, which generates asm() statements with
output register constraints like "=" "q", i.e. as two adjacent
string literals. This doesn't work with gcc-3.2.3.
Fixed by moving the "=" part into the callers' reg parameter
(as suggested by Ingo).
Build and boot-tested with gcc-3.2.3 on 32 and 64-bit x86.
Fixes <http://bugzilla.kernel.org/show_bug.cgi?id=11205>.
Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
103 lines
3.4 KiB
C
103 lines
3.4 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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/*
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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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#ifndef __ASSEMBLY__
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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 *early_ioremap(unsigned long offset, unsigned long size);
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extern void early_iounmap(void *addr, unsigned long size);
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extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
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#endif
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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_read(__readq, "q", unsigned long, "=r", )
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build_mmio_write(writeq, "q", unsigned long, "r", :"memory")
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build_mmio_write(__writeq, "q", unsigned long, "r", )
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#define readq_relaxed(a) __readq(a)
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#define __raw_readq __readq
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#define __raw_writeq writeq
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/* Let people know we have them */
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#define readq readq
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#define writeq writeq
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#endif
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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 *early_ioremap(unsigned long offset, unsigned long size);
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extern void early_iounmap(void *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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