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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1992 - 1997, 2000 Silicon Graphics, Inc.
* Copyright (C) 2000 by Colin Ngam
*/
#ifndef _ASM_SN_LAUNCH_H
#define _ASM_SN_LAUNCH_H
#include <asm/sn/types.h>
#include <asm/sn/addrs.h>
/*
* The launch data structure resides at a fixed place in each node's memory
* and is used to communicate between the master processor and the slave
* processors.
*
* The master stores launch parameters in the launch structure
* corresponding to a target processor that is in a slave loop, then sends
* an interrupt to the slave processor. The slave calls the desired
* function, then returns to the slave loop. The master may poll or wait
* for the slaves to finish.
*
* There is an array of launch structures, one per CPU on the node. One
* interrupt level is used per local CPU.
*/
#define LAUNCH_MAGIC 0xaddbead2addbead3
#ifdef CONFIG_SGI_IP27
#define LAUNCH_SIZEOF 0x100
#define LAUNCH_PADSZ 0xa0
#endif
#define LAUNCH_OFF_MAGIC 0x00 /* Struct offsets for assembly */
#define LAUNCH_OFF_BUSY 0x08
#define LAUNCH_OFF_CALL 0x10
#define LAUNCH_OFF_CALLC 0x18
#define LAUNCH_OFF_CALLPARM 0x20
#define LAUNCH_OFF_STACK 0x28
#define LAUNCH_OFF_GP 0x30
#define LAUNCH_OFF_BEVUTLB 0x38
#define LAUNCH_OFF_BEVNORMAL 0x40
#define LAUNCH_OFF_BEVECC 0x48
#define LAUNCH_STATE_DONE 0 /* Return value of LAUNCH_POLL */
#define LAUNCH_STATE_SENT 1
#define LAUNCH_STATE_RECD 2
/*
* The launch routine is called only if the complement address is correct.
*
* Before control is transferred to a routine, the complement address
* is zeroed (invalidated) to prevent an accidental call from a spurious
* interrupt.
*
* The slave_launch routine turns on the BUSY flag, and the slave loop
* clears the BUSY flag after control is returned to it.
*/
#ifndef __ASSEMBLY__
typedef int launch_state_t;
typedef void (*launch_proc_t)(u64 call_parm);
typedef struct launch_s {
volatile u64 magic; /* Magic number */
volatile u64 busy; /* Slave currently active */
volatile launch_proc_t call_addr; /* Func. for slave to call */
volatile u64 call_addr_c; /* 1's complement of call_addr*/
volatile u64 call_parm; /* Single parm passed to call*/
volatile void *stack_addr; /* Stack pointer for slave function */
volatile void *gp_addr; /* Global pointer for slave func. */
volatile char *bevutlb;/* Address of bev utlb ex handler */
volatile char *bevnormal;/*Address of bev normal ex handler */
volatile char *bevecc;/* Address of bev cache err handler */
volatile char pad[160]; /* Pad to LAUNCH_SIZEOF */
} launch_t;
/*
* PROM entry points for launch routines are determined by IPxxprom/start.s
*/
#define LAUNCH_SLAVE (*(void (*)(int nasid, int cpu, \
launch_proc_t call_addr, \
u64 call_parm, \
void *stack_addr, \
void *gp_addr)) \
IP27PROM_LAUNCHSLAVE)
#define LAUNCH_WAIT (*(void (*)(int nasid, int cpu, int timeout_msec)) \
IP27PROM_WAITSLAVE)
#define LAUNCH_POLL (*(launch_state_t (*)(int nasid, int cpu)) \
IP27PROM_POLLSLAVE)
#define LAUNCH_LOOP (*(void (*)(void)) \
IP27PROM_SLAVELOOP)
#define LAUNCH_FLASH (*(void (*)(void)) \
IP27PROM_FLASHLEDS)
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_SN_LAUNCH_H */