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 */