Changeset 1f12fab in mainline for kernel/arch/sparc32/include/arch/istate.h

Timestamp:

2013-10-07T20:00:34Z (11 years ago)

Author:

Jakub Klama <jakub.klama@…>

Branches:

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

Children:

a73ebf0

Parents:

80d9d83

Message:

First attempt to implement preemptive trap handlers
and switch to userspace. Preemptive traps are needed
for at least page faults, as page fault handling code
can trigger window underflow/overflow exceptions.

This commit also introduces userspace window buffer
for saving userspace register windows (just as in
sparc64).

These changes are unfinished and far from working
correctly.

File:

• kernel/arch/sparc32/include/arch/istate.h (modified) (7 diffs)

kernel/arch/sparc32/include/arch/istate.h

@@ -27 +27 @@
  */
 
-/** @addtogroup abs32leinterrupt
+/** @addtogroup sparc32interrupt
  * @{
  */
@@ -33 +33 @@
  */
 
-#ifndef KERN_abs32le_ISTATE_H_
-#define KERN_abs32le_ISTATE_H_
+#ifndef KERN_sparc32_ISTATE_H_
+#define KERN_sparc32_ISTATE_H_
 
 #include <trace.h>
@@ -54 +54 @@
  */
 typedef struct istate {
-        uintptr_t ip;
-        uintptr_t fp;
+        uintptr_t pstate;
+        uintptr_t pc;
+        uintptr_t npc;
         uint32_t stack[];
 } istate_t;
@@ -64 +65 @@
         /* On real hardware this checks whether the interrupted
            context originated from user space. */
-        
-        return !(istate->ip & UINT32_C(0x80000000));
+
+        return !(istate->pc & UINT32_C(0x80000000));
 }
 
@@ -74 +75 @@
         /* On real hardware this sets the instruction pointer. */
         
-        istate->ip = retaddr;
+        istate->pc = retaddr;
 }
 
@@ -82 +83 @@
         /* On real hardware this returns the instruction pointer. */
         
-        return istate->ip;
+        return istate->pc;
 }
 
@@ -90 +91 @@
         /* On real hardware this returns the frame pointer. */
         
-        return istate->fp;
+        return 0;//istate->fp;
 }