Changeset c192134 in mainline for arch/ia32/src/pm.c

Timestamp:

2005-07-21T13:00:38Z (20 years ago)

Author:

Jakub Vana <jakub.vana@…>

Branches:

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

Children:

2884193

Parents:

5d945376

Message:

Clear IOPL on start of system on all CPUs and clear NT before all irets.

File:

• arch/ia32/src/pm.c (modified) (2 diffs)

arch/ia32/src/pm.c

@@ -129 +129 @@
 
 
+
+static void clean_IOPL_NT_flags(void)
+{
+  asm
+        (
+    "pushfl;"
+                "pop %%eax;"
+                "and $0xffff8fff,%%eax;"
+                "push %%eax;"
+                "popfl;"
+                :
+                :
+                :"%eax"
+        );
+}
+
+
+
+
 void pm_init(void)
 {
@@ -166 +185 @@
          */
         __asm__("ltr %0" : : "r" ((__u16) selector(TSS_DES)));
+        
+        clean_IOPL_NT_flags();
 }