launch.h
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上传日期:2013-02-24
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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 <linux/config.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 compliment 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.
- */
- #ifdef _LANGUAGE_C
- 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)
- #ifdef _STANDALONE
- launch_t *launch_get(int nasid, int cpu);
- launch_t *launch_get_current(void);
- void launch_loop(void);
- void launch_slave(int nasid, int cpu,
- launch_proc_t call_addr,
- __int64_t call_parm,
- void *stack_addr,
- void *gp_addr);
- int launch_wait(int nasid, int cpu, int timeout_msec);
- launch_state_t launch_poll(int nasid, int cpu);
- #endif /* _STANDALONE */
- #endif /* _LANGUAGE_C */
- #endif /* _ASM_SN_LAUNCH_H */