1 | /* |
---|
2 | * sys_get_core_id.c - Kernel function implementing the "get_core_id" syscall. |
---|
3 | * |
---|
4 | * Author Alain Greiner (2016,2017,2018,2019) |
---|
5 | * |
---|
6 | * Copyright (c) UPMC Sorbonne Universites |
---|
7 | * |
---|
8 | * This file is part of ALMOS-MKH. |
---|
9 | * |
---|
10 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
---|
11 | * under the terms of the GNU General Public License as published by |
---|
12 | * the Free Software Foundation; version 2.0 of the License. |
---|
13 | * |
---|
14 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
---|
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
---|
17 | * General Public License for more details. |
---|
18 | * |
---|
19 | * You should have received a copy of the GNU General Public License |
---|
20 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
---|
21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
---|
22 | */ |
---|
23 | |
---|
24 | #include <hal_kernel_types.h> |
---|
25 | #include <hal_uspace.h> |
---|
26 | #include <hal_vmm.h> |
---|
27 | #include <hal_special.h> |
---|
28 | #include <errno.h> |
---|
29 | #include <core.h> |
---|
30 | #include <thread.h> |
---|
31 | #include <process.h> |
---|
32 | #include <vmm.h> |
---|
33 | #include <printk.h> |
---|
34 | |
---|
35 | #include <syscalls.h> |
---|
36 | |
---|
37 | //////////////////////////////////// |
---|
38 | int sys_get_core_id( uint32_t * cxy, |
---|
39 | uint32_t * lid ) |
---|
40 | { |
---|
41 | error_t error; |
---|
42 | vseg_t * vseg; |
---|
43 | uint32_t k_cxy; |
---|
44 | uint32_t k_lid; |
---|
45 | |
---|
46 | thread_t * this = CURRENT_THREAD; |
---|
47 | process_t * process = this->process; |
---|
48 | |
---|
49 | #if (DEBUG_SYS_GET_CORE_ID || CONFIG_INSTRUMENTATION_SYSCALLS) |
---|
50 | uint64_t tm_start = hal_get_cycles(); |
---|
51 | #endif |
---|
52 | |
---|
53 | #if DEBUG_SYS_GET_CORE_ID |
---|
54 | if( DEBUG_SYS_GET_CORE_ID < tm_start ) |
---|
55 | printk("\n[%s] thread[%x,%x] enter / cycle %d\n", |
---|
56 | __FUNCTION__, process->pid, this->trdid, (uint32_t)tm_start ); |
---|
57 | #endif |
---|
58 | |
---|
59 | // check cxy buffer in user space |
---|
60 | error = vmm_get_vseg( process , (intptr_t)cxy , &vseg ); |
---|
61 | |
---|
62 | if( error ) |
---|
63 | { |
---|
64 | |
---|
65 | #if DEBUG_SYSCALLS_ERROR |
---|
66 | printk("\n[ERROR] in %s : cxy buffer unmapped %x / thread %x / process %x\n", |
---|
67 | __FUNCTION__ , (intptr_t)cxy , this->trdid , process->pid ); |
---|
68 | #endif |
---|
69 | this->errno = EFAULT; |
---|
70 | return -1; |
---|
71 | } |
---|
72 | |
---|
73 | // check lid buffer in user space |
---|
74 | error = vmm_get_vseg( process , (intptr_t)lid , &vseg ); |
---|
75 | |
---|
76 | if( error ) |
---|
77 | { |
---|
78 | |
---|
79 | #if DEBUG_SYSCALLS_ERROR |
---|
80 | printk("\n[ERROR] in %s : lid buffer unmapped %x / thread %x / process %x\n", |
---|
81 | __FUNCTION__ , (intptr_t)lid , this->trdid , process->pid ); |
---|
82 | #endif |
---|
83 | this->errno = EFAULT; |
---|
84 | return -1; |
---|
85 | } |
---|
86 | |
---|
87 | // get parameters |
---|
88 | k_cxy = local_cxy; |
---|
89 | k_lid = this->core->lid; |
---|
90 | |
---|
91 | // copy to user space |
---|
92 | hal_copy_to_uspace( cxy, |
---|
93 | XPTR( local_cxy , &k_cxy ), |
---|
94 | sizeof(uint32_t) ); |
---|
95 | |
---|
96 | hal_copy_to_uspace( lid, |
---|
97 | XPTR( local_cxy , &k_lid ), |
---|
98 | sizeof(uint32_t) ); |
---|
99 | |
---|
100 | #if (DEBUG_SYS_GET_CORE_ID || CONFIG_INSTRUMENTATION_SYSCALLS) |
---|
101 | uint64_t tm_end = hal_get_cycles(); |
---|
102 | #endif |
---|
103 | |
---|
104 | #if DEBUG_SYS_GET_CORE_ID |
---|
105 | if( DEBUG_SYS_GET_CORE_ID < tm_end ) |
---|
106 | printk("\n[%s] thread[%x,%x] exit / cycle %d\n", |
---|
107 | __FUNCTION__ , process->pid, this->trdid, (uint32_t)tm_end ); |
---|
108 | #endif |
---|
109 | |
---|
110 | #if CONFIG_INSTRUMENTATION_SYSCALLS |
---|
111 | hal_atomic_add( &syscalls_cumul_cost[SYS_GET_CORE_ID] , tm_end - tm_start ); |
---|
112 | hal_atomic_add( &syscalls_occurences[SYS_GET_CORE_ID] , 1 ); |
---|
113 | #endif |
---|
114 | |
---|
115 | return 0; |
---|
116 | |
---|
117 | } // end sys_get_core() |
---|