launch.h (3418B)
1/* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 1992 - 1997, 2000 Silicon Graphics, Inc. 7 * Copyright (C) 2000 by Colin Ngam 8 */ 9#ifndef _ASM_SN_LAUNCH_H 10#define _ASM_SN_LAUNCH_H 11 12#include <asm/sn/types.h> 13#include <asm/sn/addrs.h> 14 15/* 16 * The launch data structure resides at a fixed place in each node's memory 17 * and is used to communicate between the master processor and the slave 18 * processors. 19 * 20 * The master stores launch parameters in the launch structure 21 * corresponding to a target processor that is in a slave loop, then sends 22 * an interrupt to the slave processor. The slave calls the desired 23 * function, then returns to the slave loop. The master may poll or wait 24 * for the slaves to finish. 25 * 26 * There is an array of launch structures, one per CPU on the node. One 27 * interrupt level is used per local CPU. 28 */ 29 30#define LAUNCH_MAGIC 0xaddbead2addbead3 31#ifdef CONFIG_SGI_IP27 32#define LAUNCH_SIZEOF 0x100 33#define LAUNCH_PADSZ 0xa0 34#endif 35 36#define LAUNCH_OFF_MAGIC 0x00 /* Struct offsets for assembly */ 37#define LAUNCH_OFF_BUSY 0x08 38#define LAUNCH_OFF_CALL 0x10 39#define LAUNCH_OFF_CALLC 0x18 40#define LAUNCH_OFF_CALLPARM 0x20 41#define LAUNCH_OFF_STACK 0x28 42#define LAUNCH_OFF_GP 0x30 43#define LAUNCH_OFF_BEVUTLB 0x38 44#define LAUNCH_OFF_BEVNORMAL 0x40 45#define LAUNCH_OFF_BEVECC 0x48 46 47#define LAUNCH_STATE_DONE 0 /* Return value of LAUNCH_POLL */ 48#define LAUNCH_STATE_SENT 1 49#define LAUNCH_STATE_RECD 2 50 51/* 52 * The launch routine is called only if the complement address is correct. 53 * 54 * Before control is transferred to a routine, the complement address 55 * is zeroed (invalidated) to prevent an accidental call from a spurious 56 * interrupt. 57 * 58 * The slave_launch routine turns on the BUSY flag, and the slave loop 59 * clears the BUSY flag after control is returned to it. 60 */ 61 62#ifndef __ASSEMBLY__ 63 64typedef int launch_state_t; 65typedef void (*launch_proc_t)(u64 call_parm); 66 67typedef struct launch_s { 68 volatile u64 magic; /* Magic number */ 69 volatile u64 busy; /* Slave currently active */ 70 volatile launch_proc_t call_addr; /* Func. for slave to call */ 71 volatile u64 call_addr_c; /* 1's complement of call_addr*/ 72 volatile u64 call_parm; /* Single parm passed to call*/ 73 volatile void *stack_addr; /* Stack pointer for slave function */ 74 volatile void *gp_addr; /* Global pointer for slave func. */ 75 volatile char *bevutlb;/* Address of bev utlb ex handler */ 76 volatile char *bevnormal;/*Address of bev normal ex handler */ 77 volatile char *bevecc;/* Address of bev cache err handler */ 78 volatile char pad[160]; /* Pad to LAUNCH_SIZEOF */ 79} launch_t; 80 81/* 82 * PROM entry points for launch routines are determined by IPxxprom/start.s 83 */ 84 85#define LAUNCH_SLAVE (*(void (*)(int nasid, int cpu, \ 86 launch_proc_t call_addr, \ 87 u64 call_parm, \ 88 void *stack_addr, \ 89 void *gp_addr)) \ 90 IP27PROM_LAUNCHSLAVE) 91 92#define LAUNCH_WAIT (*(void (*)(int nasid, int cpu, int timeout_msec)) \ 93 IP27PROM_WAITSLAVE) 94 95#define LAUNCH_POLL (*(launch_state_t (*)(int nasid, int cpu)) \ 96 IP27PROM_POLLSLAVE) 97 98#define LAUNCH_LOOP (*(void (*)(void)) \ 99 IP27PROM_SLAVELOOP) 100 101#define LAUNCH_FLASH (*(void (*)(void)) \ 102 IP27PROM_FLASHLEDS) 103 104#endif /* !__ASSEMBLY__ */ 105 106#endif /* _ASM_SN_LAUNCH_H */