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#define VPE_PATH_MAX 256
30
31static inline int aprp_cpu_index(void)
32{
33#ifdef CONFIG_MIPS_CMP
34	return setup_max_cpus;
35#else
36	extern int tclimit;
37	return tclimit;
38#endif
39}
40
41enum vpe_state {
42	VPE_STATE_UNUSED = 0,
43	VPE_STATE_INUSE,
44	VPE_STATE_RUNNING
45};
46
47enum tc_state {
48	TC_STATE_UNUSED = 0,
49	TC_STATE_INUSE,
50	TC_STATE_RUNNING,
51	TC_STATE_DYNAMIC
52};
53
54struct vpe {
55	enum vpe_state state;
56
57	/* (device) minor associated with this vpe */
58	int minor;
59
60	/* elfloader stuff */
61	void *load_addr;
62	unsigned long len;
63	char *pbuffer;
64	unsigned long plen;
65	char cwd[VPE_PATH_MAX];
66
67	unsigned long __start;
68
69	/* tc's associated with this vpe */
70	struct list_head tc;
71
72	/* The list of vpe's */
73	struct list_head list;
74
75	/* shared symbol address */
76	void *shared_ptr;
77
78	/* the list of who wants to know when something major happens */
79	struct list_head notify;
80
81	unsigned int ntcs;
82};
83
84struct tc {
85	enum tc_state state;
86	int index;
87
88	struct vpe *pvpe;	/* parent VPE */
89	struct list_head tc;	/* The list of TC's with this VPE */
90	struct list_head list;	/* The global list of tc's */
91};
92
93struct vpe_notifications {
94	void (*start)(int vpe);
95	void (*stop)(int vpe);
96
97	struct list_head list;
98};
99
100struct vpe_control {
101	spinlock_t vpe_list_lock;
102	struct list_head vpe_list;      /* Virtual processing elements */
103	spinlock_t tc_list_lock;
104	struct list_head tc_list;       /* Thread contexts */
105};
106
107extern unsigned long physical_memsize;
108extern struct vpe_control vpecontrol;
109extern const struct file_operations vpe_fops;
110
111int vpe_notify(int index, struct vpe_notifications *notify);
112
113void *vpe_get_shared(int index);
114char *vpe_getcwd(int index);
115
116struct vpe *get_vpe(int minor);
117struct tc *get_tc(int index);
118struct vpe *alloc_vpe(int minor);
119struct tc *alloc_tc(int index);
120void release_vpe(struct vpe *v);
121
122void *alloc_progmem(unsigned long len);
123void release_progmem(void *ptr);
124
125int __weak vpe_run(struct vpe *v);
126void cleanup_tc(struct tc *tc);
127
128int __init vpe_module_init(void);
129void __exit vpe_module_exit(void);
130#endif /* _ASM_VPE_H */
131