forked from Minki/linux
b7782d3f08
With CONFIG_OMAP4_ERRATA_I688 enabled, omap2+ build
was broken as below:
arch/arm/kernel/io.c: In function '_memcpy_toio':
arch/arm/kernel/io.c:29: error: implicit declaration of function 'outer_sync'
make[1]: *** [arch/arm/kernel/io.o] Error 1
This was caused by commit 9f97da78 (Disintegrate asm/system.h for ARM).
Signed-off-by: R Sricharan <r.sricharan@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
[tony@atomide.com: updated comments]
Signed-off-by: Tony Lindgren <tony@atomide.com>
70 lines
2.3 KiB
C
70 lines
2.3 KiB
C
#ifndef __ASM_BARRIER_H
|
|
#define __ASM_BARRIER_H
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <asm/outercache.h>
|
|
|
|
#define nop() __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t");
|
|
|
|
#if __LINUX_ARM_ARCH__ >= 7 || \
|
|
(__LINUX_ARM_ARCH__ == 6 && defined(CONFIG_CPU_32v6K))
|
|
#define sev() __asm__ __volatile__ ("sev" : : : "memory")
|
|
#define wfe() __asm__ __volatile__ ("wfe" : : : "memory")
|
|
#define wfi() __asm__ __volatile__ ("wfi" : : : "memory")
|
|
#endif
|
|
|
|
#if __LINUX_ARM_ARCH__ >= 7
|
|
#define isb() __asm__ __volatile__ ("isb" : : : "memory")
|
|
#define dsb() __asm__ __volatile__ ("dsb" : : : "memory")
|
|
#define dmb() __asm__ __volatile__ ("dmb" : : : "memory")
|
|
#elif defined(CONFIG_CPU_XSC3) || __LINUX_ARM_ARCH__ == 6
|
|
#define isb() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c5, 4" \
|
|
: : "r" (0) : "memory")
|
|
#define dsb() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 4" \
|
|
: : "r" (0) : "memory")
|
|
#define dmb() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" \
|
|
: : "r" (0) : "memory")
|
|
#elif defined(CONFIG_CPU_FA526)
|
|
#define isb() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c5, 4" \
|
|
: : "r" (0) : "memory")
|
|
#define dsb() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 4" \
|
|
: : "r" (0) : "memory")
|
|
#define dmb() __asm__ __volatile__ ("" : : : "memory")
|
|
#else
|
|
#define isb() __asm__ __volatile__ ("" : : : "memory")
|
|
#define dsb() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 4" \
|
|
: : "r" (0) : "memory")
|
|
#define dmb() __asm__ __volatile__ ("" : : : "memory")
|
|
#endif
|
|
|
|
#ifdef CONFIG_ARCH_HAS_BARRIERS
|
|
#include <mach/barriers.h>
|
|
#elif defined(CONFIG_ARM_DMA_MEM_BUFFERABLE) || defined(CONFIG_SMP)
|
|
#define mb() do { dsb(); outer_sync(); } while (0)
|
|
#define rmb() dsb()
|
|
#define wmb() mb()
|
|
#else
|
|
#include <asm/memory.h>
|
|
#define mb() do { if (arch_is_coherent()) dmb(); else barrier(); } while (0)
|
|
#define rmb() do { if (arch_is_coherent()) dmb(); else barrier(); } while (0)
|
|
#define wmb() do { if (arch_is_coherent()) dmb(); else barrier(); } while (0)
|
|
#endif
|
|
|
|
#ifndef CONFIG_SMP
|
|
#define smp_mb() barrier()
|
|
#define smp_rmb() barrier()
|
|
#define smp_wmb() barrier()
|
|
#else
|
|
#define smp_mb() dmb()
|
|
#define smp_rmb() dmb()
|
|
#define smp_wmb() dmb()
|
|
#endif
|
|
|
|
#define read_barrier_depends() do { } while(0)
|
|
#define smp_read_barrier_depends() do { } while(0)
|
|
|
|
#define set_mb(var, value) do { var = value; smp_mb(); } while (0)
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
#endif /* __ASM_BARRIER_H */
|