include/asm-mips/sn/launch.h

   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
  64 typedef int launch_state_t;
  65 typedef void (*launch_proc_t)(u64 call_parm);
  66
  67 typedef 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 */