source: trunk/kernel/syscalls/sys_get_config.c @ 635

Last change on this file since 635 was 635, checked in by alain, 15 months ago

This version is a major evolution: The physical memory allocators,
defined in the kmem.c, ppm.c, and kcm.c files have been modified
to support remote accesses. The RPCs that were previously user
to allocate physical memory in a remote cluster have been removed.
This has been done to cure a dead-lock in case of concurrent page-faults.

This version 2.2 has been tested on a (4 clusters / 2 cores per cluster)
TSAR architecture, for both the "sort" and the "fft" applications.

File size: 3.7 KB
Line 
1/*
2 * sys_get_config.c - get hardware platform parameters.
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//////////////////////////////////////
38int sys_get_config( uint32_t * x_size,
39                    uint32_t * y_size,
40                    uint32_t * ncores )
41{
42        error_t    error;
43    vseg_t   * vseg;
44    uint32_t   k_x_size;
45    uint32_t   k_y_size;
46    uint32_t   k_ncores;
47
48    thread_t  * this    = CURRENT_THREAD;
49    process_t * process = this->process;
50
51#if (DEBUG_SYS_GET_CONFIG || CONFIG_INSTRUMENTATION_SYSCALLS)
52uint64_t     tm_start = hal_get_cycles();
53#endif
54
55#if DEBUG_SYS_GET_CONFIG
56tm_start = hal_get_cycles();
57if( DEBUG_SYS_GET_CONFIG < tm_start )
58printk("\n[DBG] %s : thread %x enter / process %x / cycle %d\n",
59__FUNCTION__, this, process->pid, (uint32_t)tm_start );
60#endif
61
62    // check x_size buffer in user space
63    error = vmm_get_vseg( process , (intptr_t)x_size  , &vseg );
64
65        if( error )
66        {
67
68#if DEBUG_SYSCALLS_ERROR
69printk("\n[ERROR] in %s : x_size buffer unmapped / thread %x / process %x\n",
70__FUNCTION__ , (intptr_t)x_size , this->trdid , process->pid );
71#endif
72        this->errno = EINVAL;
73                return -1;
74        }
75
76    // check y_size buffer in user space
77    error = vmm_get_vseg( process , (intptr_t)y_size  , &vseg );
78
79        if( error )
80        {
81
82#if DEBUG_SYSCALLS_ERROR
83printk("\n[ERROR] in %s : y_size buffer unmapped / thread %x / process %x\n",
84__FUNCTION__ , (intptr_t)y_size , this->trdid , process->pid );
85#endif
86        this->errno = EINVAL;
87                return -1;
88        }
89
90    // check ncores buffer in user space
91    error = vmm_get_vseg( process , (intptr_t)ncores  , &vseg );
92
93        if( error )
94        {
95
96#if DEBUG_SYSCALLS_ERROR
97printk("\n[ERROR] in %s : ncores buffer unmapped / thread %x / process %x\n",
98__FUNCTION__ , (intptr_t)ncores , this->trdid , process->pid );
99#endif
100        this->errno = EINVAL;
101                return -1;
102        }
103
104    // get parameters
105        k_x_size  = LOCAL_CLUSTER->x_size;
106        k_y_size  = LOCAL_CLUSTER->y_size;
107        k_ncores  = LOCAL_CLUSTER->cores_nr;
108
109    // copy to user space
110        hal_copy_to_uspace( local_cxy, &k_x_size, x_size, sizeof(uint32_t) );
111        hal_copy_to_uspace( local_cxy, &k_y_size, y_size, sizeof(uint32_t) );
112        hal_copy_to_uspace( local_cxy, &k_ncores, ncores, sizeof(uint32_t) );
113
114    hal_fence();
115
116#if (DEBUG_SYS_GET_CONFIG || CONFIG_INSTRUMENTATION_SYSCALLS)
117uint64_t     tm_end = hal_get_cycles();
118#endif
119
120#if DEBUG_SYS_GET_CONFIG
121if( DEBUG_SYS_GET_CONFIG < tm_end )
122printk("\n[DBG] %s : thread %x exit / process %x / cost %d / cycle %d\n",
123__FUNCTION__, this, process->pid, (uint32_t)(tm_end-tm_start), (uint32_t)tm_end );
124#endif
125
126#if CONFIG_INSTRUMENTATION_SYSCALLS
127hal_atomic_add( &syscalls_cumul_cost[SYS_GET_CONFIG] , tm_end - tm_start );
128hal_atomic_add( &syscalls_occurences[SYS_GET_CONFIG] , 1 );
129#endif
130
131        return 0; 
132
133}  // end sys_get_config()
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