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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
65typedef int launch_state_t;
66typedef void (*launch_proc_t)(u64 call_parm);
67
68typedef 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 */