Changeset 1f12fab in mainline for kernel/arch/sparc32/src/proc/scheduler.c

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/src/proc/scheduler.c (modified) (3 diffs)

kernel/arch/sparc32/src/proc/scheduler.c

@@ -1 +1 @@
 /*
- * Copyright (c) 2010 Martin Decky
+ * Copyright (c) 2013 Jakub Klama
  * All rights reserved.
  *
@@ -34 +34 @@
 
 #include <proc/scheduler.h>
+#include <proc/thread.h>
+#include <arch.h>
+#include <arch/arch.h>
 
 void before_task_runs_arch(void)
@@ -41 +44 @@
 void before_thread_runs_arch(void)
 {
+        kernel_sp = (uintptr_t) THREAD->kstack + STACK_SIZE;
+        uspace_wbuf = (uintptr_t) THREAD->arch.uspace_window_buffer;
 }