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