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authorSimon Glass <sjg@chromium.org>2016-03-11 22:07:06 -0700
committerBin Meng <bmeng.cn@gmail.com>2016-03-17 10:27:25 +0800
commit30928c1151225f4f318521bb3e04fa8431f7a938 (patch)
tree14b1e96fbd144bbedb5f52e46719c79d2481c53a /arch
parentb70e742d16d7c95d607fa5caf8b6471c259016a4 (diff)
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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.h22
1 files changed, 22 insertions, 0 deletions
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)
{
}