source: trunk/hal/x86_64/drivers/soclib_pic.c @ 75

Last change on this file since 75 was 75, checked in by max@…, 5 years ago

Create the drivers/ sub-directory in each hal, and move soclib
into it. Note that soclib is not valid for x86_64, but more
changes will come.

File size: 4.0 KB
Line 
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 <chdev.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( chdev_t  * chdev )
35{
36    // get PIC controller segment cluster and local pointer
37    cxy_t      seg_cxy = (cxy_t)GET_CXY( chdev->base );
38    uint32_t * seg_ptr = (uint32_t *)GET_PTR( chdev->base );
39    uint32_t   i;
40
41    // reset the MASK registers for all input IRQs
42    for( i = 0 ; i < CONFIG_MAX_IRQS_PER_PIC ; i++ )
43    {
44        hal_remote_sw( XPTR( seg_cxy , seg_ptr + i*IOPIC_SPAN + IOPIC_MASK ) , 0 ); 
45    }
46}
47
48////////////////////////////////////////////
49void soclib_pic_bind_irq( xptr_t     dev_xp,
50                          uint32_t   irq_id,
51                          xptr_t     xp_wti )
52{
53    // get PIC device descriptor cluster and local pointer
54    cxy_t     dev_cxy = GET_CXY( dev_xp );
55    chdev_t * dev_ptr = (chdev_t *)GET_PTR( dev_xp );
56 
57    // get extended pointer on PIC segment base from PIC device descriptor
58    xptr_t seg_xp = (xptr_t)hal_remote_lwd( XPTR( dev_cxy , &dev_ptr->base ) );
59 
60    // get PIC controller segment cluster and local pointer
61    cxy_t      seg_cxy = (cxy_t)GET_CXY( seg_xp);
62    uint32_t * seg_ptr = (uint32_t *)GET_PTR( seg_xp );
63
64    uint32_t lsb = (uint32_t)xp_wti;
65    uint32_t msb  = (uint32_t)(xp_wti>>32);
66
67        // set the IOPIC_ADDRESS and IOPIC_EXTEND registers
68    hal_remote_sw( XPTR( seg_cxy , seg_ptr+irq_id*IOPIC_SPAN+IOPIC_ADDRESS ) , lsb );
69    hal_remote_sw( XPTR( seg_cxy , seg_ptr+irq_id*IOPIC_SPAN+IOPIC_EXTEND  ) , msb );
70
71    // set IOPIC_MASK register
72    hal_remote_sw( XPTR( seg_cxy , seg_ptr+irq_id*IOPIC_SPAN+IOPIC_MASK    ) , 1   );
73}
74
75//////////////////////////////////////////////
76void soclib_pic_unbind_irq( xptr_t     dev_xp,
77                            uint32_t   irq_id )
78{
79    // get PIC device descriptor cluster and local pointer
80    cxy_t     dev_cxy = GET_CXY( dev_xp );
81    chdev_t * dev_ptr = (chdev_t *)GET_PTR( dev_xp );
82 
83    // get extended pointer on PIC segment base from PIC device descriptor
84    xptr_t seg_xp = (xptr_t)hal_remote_lwd( XPTR( dev_cxy , &dev_ptr->base ) );
85 
86    // get PIC controller segment cluster and local pointer
87    cxy_t      seg_cxy = (cxy_t)GET_CXY( seg_xp);
88    uint32_t * seg_ptr = (uint32_t *)GET_PTR( seg_xp );
89
90    // set IOPIC_MASK register
91    hal_remote_sw( XPTR( seg_cxy , seg_ptr+irq_id*IOPIC_SPAN+IOPIC_MASK    ) , 0   );
92}
93
94//////////////////////////////////////////////
95void soclib_pic_get_status( xptr_t     dev_xp,
96                            uint32_t   irq_id,
97                            uint32_t * status)
98{
99    // get PIC device descriptor cluster and local pointer
100    cxy_t     dev_cxy = GET_CXY( dev_xp );
101    chdev_t * dev_ptr = (chdev_t *)GET_PTR( dev_xp );
102 
103    // get extended pointer on PIC segment base from PIC device descriptor
104    xptr_t seg_xp = (xptr_t)hal_remote_lwd( XPTR( dev_cxy , &dev_ptr->base ) );
105 
106    // get PIC controller segment cluster and local pointer
107    cxy_t      seg_cxy = (cxy_t)GET_CXY( seg_xp);
108    uint32_t * seg_ptr = (uint32_t *)GET_PTR( seg_xp );
109
110    // return status
111        *status = hal_remote_lw( XPTR( seg_cxy , seg_ptr+irq_id*IOPIC_SPAN+IOPIC_STATUS ) );
112}
113
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