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Diffstat (limited to 'include/asm-ppc64/iSeries/ItLpQueue.h')
| -rw-r--r-- | include/asm-ppc64/iSeries/ItLpQueue.h | 92 |
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 */ |