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| author | Simon Glass <sjg@chromium.org> | 2016-03-11 22:07:07 -0700 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2016-03-17 10:27:25 +0800 |
| commit | 005174d661e0860a2af1be3025c2214142916ab4 (patch) | |
| tree | decf168ce122d37d70487ff25d6598c5788c971d /arch/x86 | |
| parent | 30928c1151225f4f318521bb3e04fa8431f7a938 (diff) | |
| download | talos-obmc-uboot-005174d661e0860a2af1be3025c2214142916ab4.tar.gz talos-obmc-uboot-005174d661e0860a2af1be3025c2214142916ab4.zip | |
x86: Allow I/O functions to use pointers
It is common with memory-mapped I/O to use the address of a structure member
to access memory, as in:
struct some_regs {
u32 ctrl;
u32 data;
}
struct some_regs *regs = (struct some_regs *)BASE_ADDRESS;
writel(1, ®->ctrl);
writel(2, ®->data);
This does not currently work with inl(), outl(), etc. Add a cast to permit
this.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/io.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h index b99e4d6454..3156781dd3 100644 --- a/arch/x86/include/asm/io.h +++ b/arch/x86/include/asm/io.h @@ -202,7 +202,7 @@ out: * Talk about misusing macros.. */ #define __OUT1(s,x) \ -static inline void out##s(unsigned x value, unsigned short port) { +static inline void _out##s(unsigned x value, unsigned short port) { #define __OUT2(s,s1,s2) \ __asm__ __volatile__ ("out" #s " %" s1 "0,%" s2 "1" @@ -213,7 +213,7 @@ __OUT1(s,x) __OUT2(s,s1,"w") : : "a" (value), "Nd" (port)); } \ __OUT1(s##_p,x) __OUT2(s,s1,"w") __FULL_SLOW_DOWN_IO : : "a" (value), "Nd" (port));} #define __IN1(s) \ -static inline RETURN_TYPE in##s(unsigned short port) { RETURN_TYPE _v; +static inline RETURN_TYPE _in##s(unsigned short port) { RETURN_TYPE _v; #define __IN2(s,s1,s2) \ __asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0" @@ -242,10 +242,18 @@ __IN(w,"") __IN(l,"") #undef RETURN_TYPE +#define inb(port) _inb((uintptr_t)(port)) +#define inw(port) _inw((uintptr_t)(port)) +#define inl(port) _inl((uintptr_t)(port)) + __OUT(b,"b",char) __OUT(w,"w",short) __OUT(l,,int) +#define outb(val, port) _outb(val, (uintptr_t)(port)) +#define outw(val, port) _outw(val, (uintptr_t)(port)) +#define outl(val, port) _outl(val, (uintptr_t)(port)) + __INS(b) __INS(w) __INS(l) |
