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