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