source: trunk/kernel/syscalls/sys_get_core.c @ 410

Last change on this file since 410 was 410, checked in by alain, 4 years ago

Introduce new syscalls.

File size: 1.9 KB
Line 
1/*
2 * sys_get_core.c - get calling core cluster and local index.
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
35/////////////////////////////////
36int sys_get_core( uint32_t * cxy,
37                  uint32_t * lid )
38{
39    paddr_t   paddr;
40    uint32_t  k_cxy;
41    uint32_t  k_lid;
42
43        error_t   error = 0;
44
45    thread_t  * this    = CURRENT_THREAD;
46    process_t * process = this->process;
47
48    // check buffers in user space
49    error |= vmm_v2p_translate( false , cxy , &paddr );
50    error |= vmm_v2p_translate( false , lid , &paddr );
51
52        if( error )
53        {
54        printk("\n[ERROR] in %s : user buffer unmapped for thread %x in process %x\n",
55        __FUNCTION__ , this->trdid , process->pid );
56        this->errno = EFAULT;
57                return -1;
58        }
59
60    // get parameters
61        k_cxy = local_cxy;
62        k_lid = this->core->lid;
63
64    // copy to user space
65        hal_copy_to_uspace( cxy , &k_cxy , sizeof(uint32_t) );
66        hal_copy_to_uspace( lid , &k_lid , sizeof(uint32_t) );
67
68        return 0; 
69
70}  // end sys_get_core()
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