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) 2005 MIPS Technologies, Inc. All rights reserved.
7 * Copyright (C) 2013 Imagination Technologies Ltd.
8 */
9 #ifndef _ASM_VPE_H
10 #define _ASM_VPE_H
11
12 #include <linux/init.h>
13 #include <linux/list.h>
14 #include <linux/smp.h>
15 #include <linux/spinlock.h>
16
17 #define VPE_MODULE_NAME "vpe"
18 #define VPE_MODULE_MINOR 1
19
20 /* grab the likely amount of memory we will need. */
21 #ifdef CONFIG_MIPS_VPE_LOADER_TOM
22 #define P_SIZE (2 * 1024 * 1024)
23 #else
24 /* add an overhead to the max kmalloc size for non-striped symbols/etc */
25 #define P_SIZE (256 * 1024)
26 #endif
27
28 #define MAX_VPES 16
29
30 static inline int aprp_cpu_index(void)
31 {
32 extern int tclimit;
33 return tclimit;
34 }
35
36 enum vpe_state {
37 VPE_STATE_UNUSED = 0,
38 VPE_STATE_INUSE,
39 VPE_STATE_RUNNING
40 };
41
42 enum tc_state {
43 TC_STATE_UNUSED = 0,
44 TC_STATE_INUSE,
45 TC_STATE_RUNNING,
46 TC_STATE_DYNAMIC
47 };
48
49 struct vpe {
50 enum vpe_state state;
51
52 /* (device) minor associated with this vpe */
53 int minor;
54
55 /* elfloader stuff */
56 void *load_addr;
57 unsigned long len;
58 char *pbuffer;
59 unsigned long plen;
60
61 unsigned long __start;
62
63 /* tc's associated with this vpe */
64 struct list_head tc;
65
66 /* The list of vpe's */
67 struct list_head list;
68
69 /* shared symbol address */
70 void *shared_ptr;
71
72 /* the list of who wants to know when something major happens */
73 struct list_head notify;
74
75 unsigned int ntcs;
76 };
77
78 struct tc {
79 enum tc_state state;
80 int index;
81
82 struct vpe *pvpe; /* parent VPE */
83 struct list_head tc; /* The list of TC's with this VPE */
84 struct list_head list; /* The global list of tc's */
85 };
86
87 struct vpe_notifications {
88 void (*start)(int vpe);
89 void (*stop)(int vpe);
90
91 struct list_head list;
92 };
93
94 struct vpe_control {
95 spinlock_t vpe_list_lock;
96 struct list_head vpe_list; /* Virtual processing elements */
97 spinlock_t tc_list_lock;
98 struct list_head tc_list; /* Thread contexts */
99 };
100
101 extern struct vpe_control vpecontrol;
102 extern const struct file_operations vpe_fops;
103
104 int vpe_notify(int index, struct vpe_notifications *notify);
105
106 void *vpe_get_shared(int index);
107
108 struct vpe *get_vpe(int minor);
109 struct tc *get_tc(int index);
110 struct vpe *alloc_vpe(int minor);
111 struct tc *alloc_tc(int index);
112 void release_vpe(struct vpe *v);
113
114 void *alloc_progmem(unsigned long len);
115 void release_progmem(void *ptr);
116
117 int vpe_run(struct vpe *v);
118 void cleanup_tc(struct tc *tc);
119
120 int __init vpe_module_init(void);
121 void __exit vpe_module_exit(void);
122 #endif /* _ASM_VPE_H */
123
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