source: trunk/kernel/syscalls/sys_get_core.c@ 629

Last change on this file since 629 was 626, checked in by alain, 7 years ago

This version has been tested on the sort multithreaded application
for TSAR_IOB architectures ranging from 1 to 8 clusters.
It fixes three bigs bugs:
1) the dev_ioc device API has been modified: the dev_ioc_sync_read()
and dev_ioc_sync_write() function use now extended pointers on the
kernel buffer to access a mapper stored in any cluster.
2) the hal_uspace API has been modified: the hal_copy_to_uspace()
and hal_copy_from_uspace() functions use now a (cxy,ptr) couple
to identify the target buffer (equivalent to an extended pointer.
3) an implementation bug has been fixed in the assembly code contained
in the hal_copy_to_uspace() and hal_copy_from_uspace() functions.
File size: 2.3 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_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/////////////////////////////////
38int sys_get_core( 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 // check cxy buffer in user space
50 error = vmm_get_vseg( process , (intptr_t)cxy , &vseg );
51
52 if( error )
53 {
54
55#if DEBUG_SYSCALLS_ERROR
56printk("\n[ERROR] in %s : cxy buffer unmapped %x / thread %x / process %x\n",
57__FUNCTION__ , (intptr_t)cxy , this->trdid , process->pid );
58hal_vmm_display( process , false );
59#endif
60 this->errno = EFAULT;
61 return -1;
62 }
63
64 // check lid buffer in user space
65 error = vmm_get_vseg( process , (intptr_t)lid , &vseg );
66
67 if( error )
68 {
69
70#if DEBUG_SYSCALLS_ERROR
71printk("\n[ERROR] in %s : lid buffer unmapped %x / thread %x / process %x\n",
72__FUNCTION__ , (intptr_t)lid , this->trdid , process->pid );
73hal_vmm_display( process , false );
74#endif
75 this->errno = EFAULT;
76 return -1;
77 }
78
79 // get parameters
80 k_cxy = local_cxy;
81 k_lid = this->core->lid;
82
83 // copy to user space
84 hal_copy_to_uspace( local_cxy, &k_cxy, cxy, sizeof(uint32_t) );
85 hal_copy_to_uspace( local_cxy, &k_lid, lid, sizeof(uint32_t) );
86
87 return 0;
88
89} // end sys_get_core()
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