79 строки
2.8 KiB
C
79 строки
2.8 KiB
C
|
/*
|
||
|
|
* 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 _ASM_POWERPC_ISERIES_IT_LP_QUEUE_H
|
||
|
|
#define _ASM_POWERPC_ISERIES_IT_LP_QUEUE_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>
|
||
|
|
|
||
|
|
#define IT_LP_MAX_QUEUES 8
|
||
|
|
|
||
|
|
#define IT_LP_NOT_USED 0 /* Queue will not be used by PLIC */
|
||
|
|
#define IT_LP_DEDICATED_IO 1 /* Queue dedicated to IO processor specified */
|
||
|
|
#define IT_LP_DEDICATED_LP 2 /* Queue dedicated to LP specified */
|
||
|
|
#define IT_LP_SHARED 3 /* Queue shared for both IO and LP */
|
||
|
|
|
||
|
|
#define IT_LP_EVENT_STACK_SIZE 4096
|
||
|
|
#define IT_LP_EVENT_MAX_SIZE 256
|
||
|
|
#define IT_LP_EVENT_ALIGN 64
|
||
|
|
|
||
|
struct hvlpevent_queue {
|
||
|
|
/*
|
||
|
|
* The hq_current_event 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 hq_overflow_pending 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 hq_overflow_pending; /* 0x00 Overflow events are pending */
|
||
|
|
u8 hq_status; /* 0x01 DedicatedIo or DedicatedLp or NotUsed */
|
||
|
|
u16 hq_proc_index; /* 0x02 Logical Proc Index for correlation */
|
||
|
|
u8 hq_reserved1[12]; /* 0x04 */
|
||
|
|
char *hq_current_event; /* 0x10 */
|
||
|
|
char *hq_last_event; /* 0x18 */
|
||
|
|
char *hq_event_stack; /* 0x20 */
|
||
|
|
u8 hq_index; /* 0x28 unique sequential index. */
|
||
|
|
u8 hq_reserved2[3]; /* 0x29-2b */
|
||
|
|
spinlock_t hq_lock;
|
||
|
|
};
|
||
|
|
|
||
|
|
extern struct hvlpevent_queue hvlpevent_queue;
|
||
|
|
|
||
|
|
extern int hvlpevent_is_pending(void);
|
||
|
extern void process_hvlpevents(void);
|
||
|
|
extern void setup_hvlpevent_queue(void);
|
||
|
|
|
||
|
|
#endif /* _ASM_POWERPC_ISERIES_IT_LP_QUEUE_H */
|