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authorStephen Rothwell <sfr@canb.auug.org.au>2008-04-10 16:39:18 +1000
committerPaul Mackerras <paulus@samba.org>2008-04-15 21:21:25 +1000
commit3eb9cf076180ed2003db77bd2c33ac4ed0211089 (patch)
treeadddbf53de36e21b015515ab692db05f0fcbec8e /include/asm-powerpc/iseries
parenta7e695f6bf37f829a01e693a1569e96a842a1017 (diff)
downloadblackbird-op-linux-3eb9cf076180ed2003db77bd2c33ac4ed0211089.tar.gz
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[POWERPC] iSeries: Use alternate paca structure for booting
The iSeries HV only needs the first two fields of the paca statically initialised, so create an alternate paca that contains only those and switch to our real paca immediately after boot. This is in order to make the 1024 cpu patches easier since they will no longer have to statically initialise the pacas for iSeries. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc/iseries')
-rw-r--r--include/asm-powerpc/iseries/alpaca.h31
1 files changed, 31 insertions, 0 deletions
diff --git a/include/asm-powerpc/iseries/alpaca.h b/include/asm-powerpc/iseries/alpaca.h
new file mode 100644
index 000000000000..26fc081cb849
--- /dev/null
+++ b/include/asm-powerpc/iseries/alpaca.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright © 2008 Stephen Rothwell IBM Corporation
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#ifndef _ASM_POWERPC_ISERIES_ALPACA_H
+#define _ASM_POWERPC_ISERIES_ALPACA_H
+
+/*
+ * This is the part of the paca that the iSeries hypervisor
+ * needs to be statically initialised. Immediately after boot
+ * we switch to the normal Linux paca.
+ */
+struct alpaca {
+ struct lppaca *lppaca_ptr; /* Pointer to LpPaca for PLIC */
+ void *reg_save_ptr; /* Pointer to LpRegSave for PLIC */
+};
+
+#endif /* _ASM_POWERPC_ISERIES_ALPACA_H */
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