From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
---
include/asm-ppc64/iSeries/ItLpQueue.h | 92 +++++++++++++++++++++++++++++++++++
1 file changed, 92 insertions(+)
create mode 100644 include/asm-ppc64/iSeries/ItLpQueue.h
(limited to 'include/asm-ppc64/iSeries/ItLpQueue.h')
diff --git a/include/asm-ppc64/iSeries/ItLpQueue.h b/include/asm-ppc64/iSeries/ItLpQueue.h
new file mode 100644
index 000000000000..4f4dde2a638d
--- /dev/null
+++ b/include/asm-ppc64/iSeries/ItLpQueue.h
@@ -0,0 +1,92 @@
+/*
+ * ItLpQueue.h
+ * Copyright (C) 2001 Mike Corrigan 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 _ITLPQUEUE_H
+#define _ITLPQUEUE_H
+
+//=============================================================================
+//
+// This control block defines the simple LP queue structure that is
+// shared between the hypervisor (PLIC) and the OS in order to send
+// events to an LP.
+//
+
+#include <asm/types.h>
+#include <asm/ptrace.h>
+
+struct HvLpEvent;
+
+#define ITMaxLpQueues 8
+
+#define NotUsed 0 // Queue will not be used by PLIC
+#define DedicatedIo 1 // Queue dedicated to IO processor specified
+#define DedicatedLp 2 // Queue dedicated to LP specified
+#define Shared 3 // Queue shared for both IO and LP
+
+#define LpEventStackSize 4096
+#define LpEventMaxSize 256
+#define LpEventAlign 64
+
+struct ItLpQueue
+{
+//
+// The xSlicCurEventPtr is the pointer to the next event stack entry that will
+// become valid. The OS must peek at this entry to determine if it is valid.
+// PLIC will set the valid indicator as the very last store into that entry.
+//
+// When the OS has completed processing of the event then it will mark the event
+// as invalid so that PLIC knows it can store into that event location again.
+//
+// If the event stack fills and there are overflow events, then PLIC will set
+// the xPlicOverflowIntPending flag in which case the OS will have to fetch the
+// additional LP events once they have drained the event stack.
+//
+// The first 16-bytes are known by both the OS and PLIC. The remainder of the
+// cache line is for use by the OS.
+//
+//=============================================================================
+ u8 xPlicOverflowIntPending;// 0x00 Overflow events are pending
+ u8 xPlicStatus; // 0x01 DedicatedIo or DedicatedLp or NotUsed
+ u16 xSlicLogicalProcIndex; // 0x02 Logical Proc Index for correlation
+ u8 xPlicRsvd[12]; // 0x04
+ char* xSlicCurEventPtr; // 0x10
+ char* xSlicLastValidEventPtr; // 0x18
+ char* xSlicEventStackPtr; // 0x20
+ u8 xIndex; // 0x28 unique sequential index.
+ u8 xSlicRsvd[3]; // 0x29-2b
+ u32 xInUseWord; // 0x2C
+ u64 xLpIntCount; // 0x30 Total Lp Int msgs processed
+ u64 xLpIntCountByType[9]; // 0x38-0x7F Event counts by type
+};
+
+extern struct ItLpQueue xItLpQueue;
+
+extern struct HvLpEvent * ItLpQueue_getNextLpEvent( struct ItLpQueue * );
+extern int ItLpQueue_isLpIntPending( struct ItLpQueue * );
+extern unsigned ItLpQueue_process( struct ItLpQueue *, struct pt_regs * );
+extern void ItLpQueue_clearValid( struct HvLpEvent * );
+
+static __inline__ void process_iSeries_events( void )
+{
+ __asm__ __volatile__ (
+ " li 0,0x5555 \n\
+ sc"
+ : : : "r0", "r3" );
+}
+
+#endif /* _ITLPQUEUE_H */
--
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