source: trunk/kernel/drivers/soclib/soclib_pic.c @ 1

Last change on this file since 1 was 1, checked in by alain, 5 years ago

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1/*
2 * soclib_pic.c - soclib PIC driver implementation.
3 *
4 * Author  Alain Greiner (2016)
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 <device.h>
26#include <soclib_pic.h>
27#include <soclib_xcu.h>
28#include <errno.h>
29#include <string.h>
30#include <vfs.h>
31
32
33//////////////////////////////////////
34void soclib_pic_init( xptr_t  dev_xp )
35{
36    // get PIC device descriptor cluster and local pointer
37    cxy_t      dev_cxy = GET_CXY( dev_xp );
38    device_t * dev_ptr = (device_t *)GET_PTR( dev_xp );
39 
40    // get extended pointer on PIC segment base from PIC device descriptor
41    xptr_t seg_xp = (xptr_t)hal_remote_lwd( XPTR( dev_cxy , &dev_ptr->base ) );
42 
43    // get PIC controller segment cluster and local pointer
44    cxy_t      seg_cxy = (cxy_t)GET_CXY( seg_xp );
45    uint32_t * seg_ptr = (uint32_t *)GET_PTR( seg_xp );
46    uint32_t   i;
47
48    // reset the MASK registers for all input IRQs
49    for( i = 0 ; i < CONFIG_MAX_IRQS_PER_PIC ; i++ )
50    {
51        hal_remote_sw( XPTR( seg_cxy , seg_ptr + i*IOPIC_SPAN + IOPIC_MASK ) , 0 ); 
52    }
53}
54
55////////////////////////////////////////////
56void soclib_pic_bind_irq( xptr_t     dev_xp,
57                          uint32_t   irq_id,
58                          xptr_t     xp_wti )
59{
60    // get PIC device descriptor cluster and local pointer
61    cxy_t      dev_cxy = GET_CXY( dev_xp );
62    device_t * dev_ptr = (device_t *)GET_PTR( dev_xp );
63 
64    // get extended pointer on PIC segment base from PIC device descriptor
65    xptr_t seg_xp = (xptr_t)hal_remote_lwd( XPTR( dev_cxy , &dev_ptr->base ) );
66 
67    // get PIC controller segment cluster and local pointer
68    cxy_t      seg_cxy = (cxy_t)GET_CXY( seg_xp);
69    uint32_t * seg_ptr = (uint32_t *)GET_PTR( seg_xp );
70
71    uint32_t lsb = (uint32_t)xp_wti;
72    uint32_t msb  = (uint32_t)(xp_wti>>32);
73
74        // set the IOPIC_ADDRESS and IOPIC_EXTEND registers
75    hal_remote_sw( XPTR( seg_cxy , seg_ptr+irq_id*IOPIC_SPAN+IOPIC_ADDRESS ) , lsb );
76    hal_remote_sw( XPTR( seg_cxy , seg_ptr+irq_id*IOPIC_SPAN+IOPIC_EXTEND  ) , msb );
77
78    // set IOPIC_MASK register
79    hal_remote_sw( XPTR( seg_cxy , seg_ptr+irq_id*IOPIC_SPAN+IOPIC_MASK    ) , 1   );
80}
81
82//////////////////////////////////////////////
83void soclib_pic_unbind_irq( xptr_t     dev_xp,
84                            uint32_t   irq_id )
85{
86    // get PIC device descriptor cluster and local pointer
87    cxy_t      dev_cxy = GET_CXY( dev_xp );
88    device_t * dev_ptr = (device_t *)GET_PTR( dev_xp );
89 
90    // get extended pointer on PIC segment base from PIC device descriptor
91    xptr_t seg_xp = (xptr_t)hal_remote_lwd( XPTR( dev_cxy , &dev_ptr->base ) );
92 
93    // get PIC controller segment cluster and local pointer
94    cxy_t      seg_cxy = (cxy_t)GET_CXY( seg_xp);
95    uint32_t * seg_ptr = (uint32_t *)GET_PTR( seg_xp );
96
97    // set IOPIC_MASK register
98    hal_remote_sw( XPTR( seg_cxy , seg_ptr+irq_id*IOPIC_SPAN+IOPIC_MASK    ) , 0   );
99}
100
101//////////////////////////////////////////////
102void soclib_pic_get_status( xptr_t     dev_xp,
103                            uint32_t   irq_id,
104                            uint32_t * status)
105{
106    // get PIC device descriptor cluster and local pointer
107    cxy_t      dev_cxy = GET_CXY( dev_xp );
108    device_t * dev_ptr = (device_t *)GET_PTR( dev_xp );
109 
110    // get extended pointer on PIC segment base from PIC device descriptor
111    xptr_t seg_xp = (xptr_t)hal_remote_lwd( XPTR( dev_cxy , &dev_ptr->base ) );
112 
113    // get PIC controller segment cluster and local pointer
114    cxy_t      seg_cxy = (cxy_t)GET_CXY( seg_xp);
115    uint32_t * seg_ptr = (uint32_t *)GET_PTR( seg_xp );
116
117    // return status
118        *status = hal_remote_lw( XPTR( seg_cxy , seg_ptr+irq_id*IOPIC_SPAN+IOPIC_STATUS ) );
119}
120
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