Linux-2.6.12-rc2v2.6.12-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!

1 files changed, 92 insertions, 0 deletions

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 */