From 8875ccfb7a6bd69d95a4e889ab36adda06c30d9e Mon Sep 17 00:00:00 2001 From: Kelly Daly Date: Wed, 2 Nov 2005 14:13:34 +1100 Subject: merge filename and modify references to iseries/it_lp_queue.h Signed-off-by: Kelly Daly --- include/asm-powerpc/iseries/it_lp_queue.h | 81 +++++++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) create mode 100644 include/asm-powerpc/iseries/it_lp_queue.h (limited to 'include/asm-powerpc/iseries') diff --git a/include/asm-powerpc/iseries/it_lp_queue.h b/include/asm-powerpc/iseries/it_lp_queue.h new file mode 100644 index 00000000000..69b26ad7413 --- /dev/null +++ b/include/asm-powerpc/iseries/it_lp_queue.h @@ -0,0 +1,81 @@ +/* + * 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 +#include + +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 hvlpevent_queue { +/* + * 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 + spinlock_t lock; +}; + +extern struct hvlpevent_queue hvlpevent_queue; + +extern int hvlpevent_is_pending(void); +extern void process_hvlpevents(struct pt_regs *); +extern void setup_hvlpevent_queue(void); + +#endif /* _ITLPQUEUE_H */ -- cgit v1.2.3-70-g09d2