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 <linux/config.h> 13 #include <asm/sn/types.h> 14 #include <asm/sn/addrs.h> 15 16 /* 17 * The launch data structure resides at a fixed place in each node's memory 18 * and is used to communicate between the master processor and the slave 19 * processors. 20 * 21 * The master stores launch parameters in the launch structure 22 * corresponding to a target processor that is in a slave loop, then sends 23 * an interrupt to the slave processor. The slave calls the desired 24 * function, then returns to the slave loop. The master may poll or wait 25 * for the slaves to finish. 26 * 27 * There is an array of launch structures, one per CPU on the node. One 28 * interrupt level is used per local CPU. 29 */ 30 31 #define LAUNCH_MAGIC 0xaddbead2addbead3 32 #ifdef CONFIG_SGI_IP27 33 #define LAUNCH_SIZEOF 0x100 34 #define LAUNCH_PADSZ 0xa0 35 #endif 36 37 #define LAUNCH_OFF_MAGIC 0x00 /* Struct offsets for assembly */ 38 #define LAUNCH_OFF_BUSY 0x08 39 #define LAUNCH_OFF_CALL 0x10 40 #define LAUNCH_OFF_CALLC 0x18 41 #define LAUNCH_OFF_CALLPARM 0x20 42 #define LAUNCH_OFF_STACK 0x28 43 #define LAUNCH_OFF_GP 0x30 44 #define LAUNCH_OFF_BEVUTLB 0x38 45 #define LAUNCH_OFF_BEVNORMAL 0x40 46 #define LAUNCH_OFF_BEVECC 0x48 47 48 #define LAUNCH_STATE_DONE 0 /* Return value of LAUNCH_POLL */ 49 #define LAUNCH_STATE_SENT 1 50 #define LAUNCH_STATE_RECD 2 51 52 /* 53 * The launch routine is called only if the complement address is correct. 54 * 55 * Before control is transferred to a routine, the compliment address 56 * is zeroed (invalidated) to prevent an accidental call from a spurious 57 * interrupt. 58 * 59 * The slave_launch routine turns on the BUSY flag, and the slave loop 60 * clears the BUSY flag after control is returned to it. 61 */ 62 63 #ifndef __ASSEMBLY__ 64 65 typedef int launch_state_t; 66 typedef void (*launch_proc_t)(u64 call_parm); 67 68 typedef struct launch_s { 69 volatile u64 magic; /* Magic number */ 70 volatile u64 busy; /* Slave currently active */ 71 volatile launch_proc_t call_addr; /* Func. for slave to call */ 72 volatile u64 call_addr_c; /* 1's complement of call_addr*/ 73 volatile u64 call_parm; /* Single parm passed to call*/ 74 volatile void *stack_addr; /* Stack pointer for slave function */ 75 volatile void *gp_addr; /* Global pointer for slave func. */ 76 volatile char *bevutlb;/* Address of bev utlb ex handler */ 77 volatile char *bevnormal;/*Address of bev normal ex handler */ 78 volatile char *bevecc;/* Address of bev cache err handler */ 79 volatile char pad[160]; /* Pad to LAUNCH_SIZEOF */ 80 } launch_t; 81 82 /* 83 * PROM entry points for launch routines are determined by IPxxprom/start.s 84 */ 85 86 #define LAUNCH_SLAVE (*(void (*)(int nasid, int cpu, \ 87 launch_proc_t call_addr, \ 88 u64 call_parm, \ 89 void *stack_addr, \ 90 void *gp_addr)) \ 91 IP27PROM_LAUNCHSLAVE) 92 93 #define LAUNCH_WAIT (*(void (*)(int nasid, int cpu, int timeout_msec)) \ 94 IP27PROM_WAITSLAVE) 95 96 #define LAUNCH_POLL (*(launch_state_t (*)(int nasid, int cpu)) \ 97 IP27PROM_POLLSLAVE) 98 99 #define LAUNCH_LOOP (*(void (*)(void)) \ 100 IP27PROM_SLAVELOOP) 101 102 #define LAUNCH_FLASH (*(void (*)(void)) \ 103 IP27PROM_FLASHLEDS) 104 105 #endif /* !__ASSEMBLY__ */ 106 107 #endif /* _ASM_SN_LAUNCH_H */ 108