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