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authorMacpaul Lin <macpaul@andestech.com>2011-10-24 13:31:05 +0800
committerMacpaul Lin <macpaul@andestech.com>2011-11-01 12:47:30 +0800
commita53ef5e4bac750d0e84cd2b79f9f7855382b561d (patch)
treed839de88e494b90d29fda8a57713c6719e79c2a0 /arch/nds32
parent466e73b19b34a1500303faffc4b17d849438fad0 (diff)
downloadu-boot-linaro-stable-a53ef5e4bac750d0e84cd2b79f9f7855382b561d.tar.gz
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>
Diffstat (limited to 'arch/nds32')
-rw-r--r--arch/nds32/include/asm/io.h72
1 files changed, 52 insertions, 20 deletions
diff --git a/arch/nds32/include/asm/io.h b/arch/nds32/include/asm/io.h
index 2504c2b7f..2c105f7fa 100644
--- a/arch/nds32/include/asm/io.h
+++ b/arch/nds32/include/asm/io.h
@@ -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()
+
+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;
-#define readb(a) __arch_getb(a)
-#define readw(a) __arch_getw(a)
-#define readl(a) __arch_getl(a)
+ 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 */
/*