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x86: Add macros to clear and set I/O bits

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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 <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2016-03-11 22:07:06 -07:00 committed by Bin Meng
parent b70e742d16
commit 30928c1151
1 changed files with 22 additions and 0 deletions
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22
arch/x86/include/asm/io.h
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@ -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)
{
}