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 #define VPE_PATH_MAX 256 30 31 static inline int aprp_cpu_index(void) 32 { 33 #ifdef CONFIG_MIPS_CMP 34 return setup_max_cpus; 35 #else 36 extern int tclimit; 37 return tclimit; 38 #endif 39 } 40 41 enum vpe_state { 42 VPE_STATE_UNUSED = 0, 43 VPE_STATE_INUSE, 44 VPE_STATE_RUNNING 45 }; 46 47 enum tc_state { 48 TC_STATE_UNUSED = 0, 49 TC_STATE_INUSE, 50 TC_STATE_RUNNING, 51 TC_STATE_DYNAMIC 52 }; 53 54 struct vpe { 55 enum vpe_state state; 56 57 /* (device) minor associated with this vpe */ 58 int minor; 59 60 /* elfloader stuff */ 61 void *load_addr; 62 unsigned long len; 63 char *pbuffer; 64 unsigned long plen; 65 char cwd[VPE_PATH_MAX]; 66 67 unsigned long __start; 68 69 /* tc's associated with this vpe */ 70 struct list_head tc; 71 72 /* The list of vpe's */ 73 struct list_head list; 74 75 /* shared symbol address */ 76 void *shared_ptr; 77 78 /* the list of who wants to know when something major happens */ 79 struct list_head notify; 80 81 unsigned int ntcs; 82 }; 83 84 struct tc { 85 enum tc_state state; 86 int index; 87 88 struct vpe *pvpe; /* parent VPE */ 89 struct list_head tc; /* The list of TC's with this VPE */ 90 struct list_head list; /* The global list of tc's */ 91 }; 92 93 struct vpe_notifications { 94 void (*start)(int vpe); 95 void (*stop)(int vpe); 96 97 struct list_head list; 98 }; 99 100 struct vpe_control { 101 spinlock_t vpe_list_lock; 102 struct list_head vpe_list; /* Virtual processing elements */ 103 spinlock_t tc_list_lock; 104 struct list_head tc_list; /* Thread contexts */ 105 }; 106 107 extern unsigned long physical_memsize; 108 extern struct vpe_control vpecontrol; 109 extern const struct file_operations vpe_fops; 110 111 int vpe_notify(int index, struct vpe_notifications *notify); 112 113 void *vpe_get_shared(int index); 114 char *vpe_getcwd(int index); 115 116 struct vpe *get_vpe(int minor); 117 struct tc *get_tc(int index); 118 struct vpe *alloc_vpe(int minor); 119 struct tc *alloc_tc(int index); 120 void release_vpe(struct vpe *v); 121 122 void *alloc_progmem(unsigned long len); 123 void release_progmem(void *ptr); 124 125 int vpe_run(struct vpe *v); 126 void cleanup_tc(struct tc *tc); 127 128 int __init vpe_module_init(void); 129 void __exit vpe_module_exit(void); 130 #endif /* _ASM_VPE_H */ 131