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 <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 complement 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 */