xref: /linux/arch/mips/include/asm/sn/launch.h (revision e5451c8f8330e03ad3cfa16048b4daf961af434f)
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 */
107