You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
93 lines
3.3 KiB
93 lines
3.3 KiB
20 years ago
|
/*
|
||
|
|
* 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 */
|