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
30static inline int aprp_cpu_index(void)
31{
32	extern int tclimit;
33	return tclimit;
34}
35
36enum vpe_state {
37	VPE_STATE_UNUSED = 0,
38	VPE_STATE_INUSE,
39	VPE_STATE_RUNNING
40};
41
42enum tc_state {
43	TC_STATE_UNUSED = 0,
44	TC_STATE_INUSE,
45	TC_STATE_RUNNING,
46	TC_STATE_DYNAMIC
47};
48
49struct 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
78struct 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
87struct vpe_notifications {
88	void (*start)(int vpe);
89	void (*stop)(int vpe);
90
91	struct list_head list;
92};
93
94struct 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
101extern struct vpe_control vpecontrol;
102extern const struct file_operations vpe_fops;
103
104int vpe_notify(int index, struct vpe_notifications *notify);
105
106void *vpe_get_shared(int index);
107
108struct vpe *get_vpe(int minor);
109struct tc *get_tc(int index);
110struct vpe *alloc_vpe(int minor);
111struct tc *alloc_tc(int index);
112void release_vpe(struct vpe *v);
113
114void *alloc_progmem(unsigned long len);
115void release_progmem(void *ptr);
116
117int vpe_run(struct vpe *v);
118void cleanup_tc(struct tc *tc);
119
120int __init vpe_module_init(void);
121void __exit vpe_module_exit(void);
122#endif /* _ASM_VPE_H */
123