source: trunk/kernel/syscalls/sys_get_config.c @ 435

Last change on this file since 435 was 435, checked in by alain, 4 years ago

Fix a bad bug in scheduler...

File size: 2.7 KB
Line 
1/*
2 * sys_get_config.c - get hardware platform parameters.
3 *
4 * Author    Alain Greiner (2016,2017)
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_types.h>
25#include <hal_uspace.h>
26#include <hal_special.h>
27#include <errno.h>
28#include <core.h>
29#include <thread.h>
30#include <process.h>
31#include <vmm.h>
32#include <printk.h>
33
34//////////////////////////////////////
35int sys_get_config( uint32_t * x_size,
36                    uint32_t * y_size,
37                    uint32_t * ncores )
38{
39    paddr_t   paddr;
40    uint32_t  k_x_size;
41    uint32_t  k_y_size;
42    uint32_t  k_ncores;
43
44        error_t   error = 0;
45
46    thread_t  * this    = CURRENT_THREAD;
47    process_t * process = this->process;
48
49#if CONFIG_DEBUG_SYS_GET_CONFIG
50uint64_t     tm_start;
51uint64_t     tm_end;
52tm_start = hal_get_cycles();
53if( CONFIG_DEBUG_SYS_GET_CONFIG < tm_start )
54printk("\n[DBG] %s : thread %x enter / process %x / cycle %d\n",
55__FUNCTION__, this, process->pid, (uint32_t)tm_start );
56#endif
57
58    // check buffer in user space
59    error |= vmm_v2p_translate( false , x_size  , &paddr );
60    error |= vmm_v2p_translate( false , y_size  , &paddr );
61    error |= vmm_v2p_translate( false , ncores  , &paddr );
62
63        if( error )
64        {
65
66#if CONFIG_DEBUG_SYSCALLS_ERROR
67printk("\n[ERROR] in %s : user buffer unmapped for thread %x in process %x\n",
68__FUNCTION__ , this->trdid , process->pid );
69#endif
70        this->errno = EFAULT;
71                return -1;
72        }
73
74    // get parameters
75        k_x_size  = LOCAL_CLUSTER->x_size;
76        k_y_size  = LOCAL_CLUSTER->y_size;
77        k_ncores  = LOCAL_CLUSTER->cores_nr;
78
79    // copy to user space
80        hal_copy_to_uspace( x_size  , &k_x_size  , sizeof(uint32_t) );
81        hal_copy_to_uspace( y_size  , &k_y_size  , sizeof(uint32_t) );
82        hal_copy_to_uspace( ncores  , &k_ncores  , sizeof(uint32_t) );
83
84    hal_fence();
85
86#if CONFIG_DEBUG_SYS_GET_CONFIG
87tm_end = hal_get_cycles();
88if( CONFIG_DEBUG_SYS_GET_CONFIG < tm_end )
89printk("\n[DBG] %s : thread %x exit / process %x / cost %d / tycle %d\n",
90__FUNCTION__, this, process->pid, (uint32_t)(tm_end-tm_start), (uint32_t)tm_end );
91#endif
92
93        return 0; 
94
95}  // end sys_get_config()
Note: See TracBrowser for help on using the repository browser.