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nds32: asm/io.h: add __iormb __iowmb and inline io support 

1. This patch add required __iormb and __iowmb to io.h.
   This also fix some misbehavior to periphal drivers.
   This io.h has been fixed with referencing arm/include/asm/io.h.
2. This patch replaced macro writeb and readb into inline function.

Signed-off-by: Macpaul Lin <macpaul@andestech.com>
utp
Macpaul Lin 2011-10-24 13:31:05 +08:00
parent 466e73b19b
commit a53ef5e4ba
1 changed files with 52 additions and 20 deletions
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72
arch/nds32/include/asm/io.h
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@ -98,13 +98,59 @@ extern void __raw_readsl(unsigned int addr, void *data, int longlen);
#define __raw_readw(a) __arch_getw(a)
#define __raw_readl(a) __arch_getl(a)
#define writeb(v, a) __arch_putb(v, a)
#define writew(v, a) __arch_putw(v, a)
#define writel(v, a) __arch_putl(v, a)
/*
* TODO: The kernel offers some more advanced versions of barriers, it might
* have some advantages to use them instead of the simple one here.
*/
#define dmb() __asm__ __volatile__ ("" : : : "memory")
#define __iormb() dmb()
#define __iowmb() dmb()
#define readb(a) __arch_getb(a)
#define readw(a) __arch_getw(a)
#define readl(a) __arch_getl(a)
static inline void writeb(unsigned char val, unsigned char *addr)
{
__iowmb();
__arch_putb(val, addr);
}
static inline void writew(unsigned short val, unsigned short *addr)
{
__iowmb();
__arch_putw(val, addr);
}
static inline void writel(unsigned int val, unsigned int *addr)
{
__iowmb();
__arch_putl(val, addr);
}
static inline unsigned char readb(unsigned char *addr)
{
u8 val;
val = __arch_getb(addr);
__iormb();
return val;
}
static inline unsigned short readw(unsigned short *addr)
{
u16 val;
val = __arch_getw(addr);
__iormb();
return val;
}
static inline unsigned int readl(unsigned int *addr)
{
u32 val;
val = __arch_getl(addr);
__iormb();
return val;
}
/*
* The compiler seems to be incapable of optimising constants
@ -338,20 +384,6 @@ check_signature(unsigned long io_addr, const unsigned char *signature,
out:
return retval;
}
#elif !defined(readb)
#define readb(addr) (__readwrite_bug("readb"), 0)
#define readw(addr) (__readwrite_bug("readw"), 0)
#define readl(addr) (__readwrite_bug("readl"), 0)
#define writeb(v, addr) __readwrite_bug("writeb")
#define writew(v, addr) __readwrite_bug("writew")
#define writel(v, addr) __readwrite_bug("writel")
#define eth_io_copy_and_sum(a, b, c, d) __readwrite_bug("eth_io_copy_and_sum")
#define check_signature(io, sig, len) (0)
#endif /* __mem_pci */
/*