LXR linux/arch/mips/include/asm/vpe.h

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