Changeset 379d73f3 in mainline for arch/amd64/include/asm.h

Timestamp:

2005-08-30T22:11:45Z (20 years ago)

Author:

Ondrej Palkovsky <ondrap@…>

Branches:

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

Children:

c5ae095

Parents:

b524f816

Message:

Added putchar to AMD

File:

• arch/amd64/include/asm.h (modified) (2 diffs)

arch/amd64/include/asm.h

@@ -33 +33 @@
 #include <config.h>
 
+
 void asm_delay_loop(__u32 t);
 
@@ -43 +44 @@
 static inline void cpu_sleep(void) { __asm__("hlt"); };
 
+
+static inline __u8 inb(__u16 port) 
+{
+        __u8 out;
+
+        asm (
+                "mov %0, %%dx;"
+                "inb %%dx,%%al;"
+                "mov %%al, %1;"
+                :"=m"(out)
+                :"m"(port)
+                :"dx","al"
+                );
+        return out;
+}
+
+static inline __u8 outb(__u16 port,__u8 b) 
+{
+        asm (
+                "mov %0,%%dx;"
+                "mov %1,%%al;"
+                "outb %%al,%%dx;"
+                :
+                :"m"( port), "m" (b)
+                :"dx","al"
+                );
+}
+
+/** Set priority level low
+ *
+ * Enable interrupts and return previous
+ * value of EFLAGS.
+ */
+static inline pri_t cpu_priority_low(void) {
+        pri_t v;
+        __asm__ volatile (
+                "pushfq\n"
+                "popq %0\n"
+                "sti\n"
+                : "=r" (v)
+        );
+        return v;
+}
+
+/** Set priority level high
+ *
+ * Disable interrupts and return previous
+ * value of EFLAGS.
+ */
+static inline pri_t cpu_priority_high(void) {
+        pri_t v;
+        __asm__ volatile (
+                "pushfq\n"
+                "popq %0\n"
+                "cli\n"
+                : "=r" (v)
+                );
+        return v;
+}
+
+/** Restore priority level
+ *
+ * Restore EFLAGS.
+ */
+static inline void cpu_priority_restore(pri_t pri) {
+        __asm__ volatile (
+                "pushq %0\n"
+                "popfq\n"
+                : : "r" (pri)
+                );
+}
+
+
 #endif