From 411d89eb6b893ddbeb530cb3fc606044776cdaf2 Mon Sep 17 00:00:00 2001
From: gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4>
Date: Wed, 10 Apr 2013 13:48:02 +0000
Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@5584
 35acf78f-673a-0410-8e92-d51de3d6d3f4

---
 os/ports/GCC/PPC/ivor.s | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'os')

diff --git a/os/ports/GCC/PPC/ivor.s b/os/ports/GCC/PPC/ivor.s
index 46dc66bf5..8235af0e5 100644
--- a/os/ports/GCC/PPC/ivor.s
+++ b/os/ports/GCC/PPC/ivor.s
@@ -86,6 +86,11 @@ _IVOR10:
         lis         %r3, 0x0800             /* DIS bit mask.                */
         mtspr       336, %r3                /* TSR register.                */
 
+#if PPC_USE_IRQ_PREEMPTION
+        /* Allows preemption while executing the software handler.*/
+        wrteei      1
+#endif
+
 #if CH_DBG_SYSTEM_STATE_CHECK
         bl          dbg_check_enter_isr
         bl          dbg_check_lock_from_isr
@@ -96,6 +101,11 @@ _IVOR10:
         bl          dbg_check_leave_isr
 #endif
 
+#if PPC_USE_IRQ_PREEMPTION
+        /* Prevents preemption again.*/
+        wrteei      0
+#endif
+
         /* System tick handler invocation.*/
 #if CH_DBG_SYSTEM_STATE_CHECK
         bl          dbg_check_lock
-- 
cgit v1.2.3