From 30928c1151225f4f318521bb3e04fa8431f7a938 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Fri, 11 Mar 2016 22:07:06 -0700 Subject: [PATCH] x86: Add macros to clear and set I/O bits The clrsetbits_...() macros are useful for working with memory mapped I/O. But they do not work with I/O space, as used on x86 machines. Add some macros to provide similar features for I/O. Signed-off-by: Simon Glass Reviewed-by: Bin Meng --- arch/x86/include/asm/io.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h index e0b2561..b99e4d6 100644 --- a/arch/x86/include/asm/io.h +++ b/arch/x86/include/asm/io.h @@ -254,6 +254,28 @@ __OUTS(b) __OUTS(w) __OUTS(l) +/* IO space accessors */ +#define clrio(type, addr, clear) \ + out##type(in##type(addr) & ~(clear), (addr)) + +#define setio(type, addr, set) \ + out##type(in##type(addr) | (set), (addr)) + +#define clrsetio(type, addr, clear, set) \ + out##type((in##type(addr) & ~(clear)) | (set), (addr)) + +#define clrio_32(addr, clear) clrio(l, addr, clear) +#define clrio_16(addr, clear) clrio(w, addr, clear) +#define clrio_8(addr, clear) clrio(b, addr, clear) + +#define setio_32(addr, set) setio(l, addr, set) +#define setio_16(addr, set) setio(w, addr, set) +#define setio_8(addr, set) setio(b, addr, set) + +#define clrsetio_32(addr, clear, set) clrsetio(l, addr, clear, set) +#define clrsetio_16(addr, clear, set) clrsetio(w, addr, clear, set) +#define clrsetio_8(addr, clear, set) clrsetio(b, addr, clear, set) + static inline void sync(void) { }