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 #ifdef CONFIG_MIPS_CMP 33 return setup_max_cpus; 34 #else 35 extern int tclimit; 36 return tclimit; 37 #endif 38 } 39 40 enum vpe_state { 41 VPE_STATE_UNUSED = 0, 42 VPE_STATE_INUSE, 43 VPE_STATE_RUNNING 44 }; 45 46 enum tc_state { 47 TC_STATE_UNUSED = 0, 48 TC_STATE_INUSE, 49 TC_STATE_RUNNING, 50 TC_STATE_DYNAMIC 51 }; 52 53 struct 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 82 struct 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 91 struct vpe_notifications { 92 void (*start)(int vpe); 93 void (*stop)(int vpe); 94 95 struct list_head list; 96 }; 97 98 struct 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 }; 104 105 extern struct vpe_control vpecontrol; 106 extern const struct file_operations vpe_fops; 107 108 int vpe_notify(int index, struct vpe_notifications *notify); 109 110 void *vpe_get_shared(int index); 111 112 struct vpe *get_vpe(int minor); 113 struct tc *get_tc(int index); 114 struct vpe *alloc_vpe(int minor); 115 struct tc *alloc_tc(int index); 116 void release_vpe(struct vpe *v); 117 118 void *alloc_progmem(unsigned long len); 119 void release_progmem(void *ptr); 120 121 int vpe_run(struct vpe *v); 122 void cleanup_tc(struct tc *tc); 123 124 int __init vpe_module_init(void); 125 void __exit vpe_module_exit(void); 126 #endif /* _ASM_VPE_H */ 127