Changeset a5556b4 in mainline

Timestamp:

2005-09-17T21:24:40Z (19 years ago)

Author:

Sergey Bondari <bondari@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

714675b

Parents:

6799505

Message:

outb inline function

Location:

arch/ia32

Files:

• include/asm.h (modified) (3 diffs)
• src/asm.S (modified) (2 diffs)

arch/ia32/include/asm.h

@@ -43 +43 @@
 extern __u32 inl(int port);
 
-extern void outb(int port, __u8 b);
 extern void outw(int port, __u16 w);
 extern void outl(int port, __u32 l);
@@ -84 +83 @@
  */
 static inline __u32 read_cr3(void) { __u32 v; __asm__ volatile ("movl %%cr3,%0\n" : "=r" (v)); return v; }
+
+/** Byte to port
+ *
+ * Output byte to port
+ *
+ * @param port Port to write to
+ * @param val Value to write
+ */
+static inline void outb(__u16 port, __u8 val) { __asm__ volatile ("outb %b0, %w1\n" : : "a" (val), "d" (port) ); }
+
 
 /** Set priority level low
@@ -167 +176 @@
 }
 
+
 #endif

arch/ia32/src/asm.S

@@ -41 +41 @@
 .global inw
 .global inl
-.global outb
 .global outw
 .global outl
@@ -191 +190 @@
         movl 4(%esp),%edx
         inl %dx,%eax
-        ret
-
-
-## I/O output (byte)
-#
-# Send a byte to I/O port.
-#
-outb:
-        push %eax
-
-        movl 8(%esp),%edx
-        movl 12(%esp),%eax
-        outb %al,%dx
-
-        pop %eax
         ret