xref: /openbmc/linux/arch/mips/include/asm/vpe.h (revision 7fb6f7b0)
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 
aprp_cpu_index(void)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