diff options
author | Simon Glass <sjg@chromium.org> | 2016-03-11 22:07:06 -0700 |
---|---|---|
committer | Bin Meng <bmeng.cn@gmail.com> | 2016-03-17 10:27:25 +0800 |
commit | 30928c1151225f4f318521bb3e04fa8431f7a938 (patch) | |
tree | 14b1e96fbd144bbedb5f52e46719c79d2481c53a /arch | |
parent | b70e742d16d7c95d607fa5caf8b6471c259016a4 (diff) |
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 <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/x86/include/asm/io.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h index e0b25619cd5..b99e4d64549 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) { } |