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authorPaul Mackerras <paulus@samba.org>2005-09-28 21:11:41 +1000
committerPaul Mackerras <paulus@samba.org>2005-09-28 21:11:41 +1000
commit952ecef7a0479049c8abb7c34a688ec2981ceadd (patch)
tree74377080bb1fe12e874d18cb77461341a904f854 /arch/powerpc/platforms/iseries/misc.S
parentbeeca08738c4c4024c81a591812bfe38f8c436c0 (diff)
parent252e75a51d40757928d692b3d339e66838294b4b (diff)
Merge Stephen Rothwell's patches
Diffstat (limited to 'arch/powerpc/platforms/iseries/misc.S')
-rw-r--r--arch/powerpc/platforms/iseries/misc.S55
1 files changed, 55 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/iseries/misc.S b/arch/powerpc/platforms/iseries/misc.S
new file mode 100644
index 00000000000..09f14522e17
--- /dev/null
+++ b/arch/powerpc/platforms/iseries/misc.S
@@ -0,0 +1,55 @@
+/*
+ * This file contains miscellaneous low-level functions.
+ * Copyright (C) 1995-2005 IBM Corp
+ *
+ * Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
+ * and Paul Mackerras.
+ * Adapted for iSeries by Mike Corrigan (mikejc@us.ibm.com)
+ * PPC64 updates by Dave Engebretsen (engebret@us.ibm.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <asm/processor.h>
+#include <asm/asm-offsets.h>
+
+ .text
+
+/* unsigned long local_save_flags(void) */
+_GLOBAL(local_get_flags)
+ lbz r3,PACAPROCENABLED(r13)
+ blr
+
+/* unsigned long local_irq_disable(void) */
+_GLOBAL(local_irq_disable)
+ lbz r3,PACAPROCENABLED(r13)
+ li r4,0
+ stb r4,PACAPROCENABLED(r13)
+ blr /* Done */
+
+/* void local_irq_restore(unsigned long flags) */
+_GLOBAL(local_irq_restore)
+ lbz r5,PACAPROCENABLED(r13)
+ /* Check if things are setup the way we want _already_. */
+ cmpw 0,r3,r5
+ beqlr
+ /* are we enabling interrupts? */
+ cmpdi 0,r3,0
+ stb r3,PACAPROCENABLED(r13)
+ beqlr
+ /* Check pending interrupts */
+ /* A decrementer, IPI or PMC interrupt may have occurred
+ * while we were in the hypervisor (which enables) */
+ ld r4,PACALPPACA+LPPACAANYINT(r13)
+ cmpdi r4,0
+ beqlr
+
+ /*
+ * Handle pending interrupts in interrupt context
+ */
+ li r0,0x5555
+ sc
+ blr