source: soft/giet_vm/giet_drivers/mwr_driver.c @ 541

Last change on this file since 541 was 529, checked in by alain, 10 years ago

1) Removing the IOC driver (integrated in the FAT library).
2) Simplifying the BDV, HBA, SDC, RDK drivers: they support
only two modes (synchronous => polling / descheduling => IRQ),
and only one access function (for both read/write).
File size: 5.1 KB
Line 
1///////////////////////////////////////////////////////////////////////////////////
2// File     : mwr_driver.c
3// Date     : 27/02/2015
4// Author   : alain greiner
5// Copyright (c) UPMC-LIP6
6///////////////////////////////////////////////////////////////////////////////////
7
8#include <giet_config.h>
9#include <hard_config.h>
10#include <mapping_info.h>
11#include <mwr_driver.h>
12#include <utils.h>
13#include <kernel_locks.h>
14#include <tty0.h>
15#include <io.h>
16
17#if !defined(X_SIZE)
18# error: You must define X_SIZE in the hard_config.h file
19#endif
20
21#if !defined(Y_SIZE)
22# error: You must define X_SIZE in the hard_config.h file
23#endif
24
25#if !defined(X_WIDTH)
26# error: You must define X_WIDTH in the hard_config.h file
27#endif
28
29#if !defined(Y_WIDTH)
30# error: You must define X_WIDTH in the hard_config.h file
31#endif
32
33#if !defined(SEG_MWR_BASE)
34# error: You must define SEG_MWR_BASE in the hard_config.h file
35#endif
36
37#if !defined(PERI_CLUSTER_INCREMENT)
38# error: You must define PERI_CLUSTER_INCREMENT in the hard_config.h file
39#endif
40
41
42/////////////////////////////////////////////////////////////////////////////
43//      Global variables
44/////////////////////////////////////////////////////////////////////////////
45
46__attribute__((section(".kdata")))
47simple_lock_t  _coproc_lock[X_SIZE*Y_SIZE];
48
49__attribute__((section(".kdata")))
50unsigned int   _coproc_done[X_SIZE*Y_SIZE];
51
52/////////////////////////////////////////////////////////////////////////////
53// This function returns the value contained in a private register
54// of the coprocessor contained in cluster "cluster_xy".
55/////////////////////////////////////////////////////////////////////////////
56unsigned int _mwr_get_coproc_register( unsigned int cluster_xy, // cluster
57                                       unsigned int index )     // register
58{
59    unsigned int vaddr =
60        SEG_MWR_BASE + 
61        (cluster_xy * PERI_CLUSTER_INCREMENT) + 
62        (index << 2);
63
64    return ioread32( (void*)vaddr );
65}
66
67/////////////////////////////////////////////////////////////////////////////
68// This function sets a new value in a private register
69// of the coprocessor contained in cluster "clustenr_xy".
70/////////////////////////////////////////////////////////////////////////////
71void _mwr_set_coproc_register( unsigned int cluster_xy,   // cluster index
72                               unsigned int index,        // register index
73                               unsigned int value )       // writte value
74{
75    unsigned int vaddr =
76        SEG_MWR_BASE + 
77        (cluster_xy * PERI_CLUSTER_INCREMENT) +
78        (index << 2);
79       
80    iowrite32( (void*)vaddr, value );
81}
82
83/////////////////////////////////////////////////////////////////////////////
84// This function returns the value contained in a channel register
85// defined by the "index" and "channel" arguments, in the MWMR_DMA component
86// contained in cluster "cluster_xy".
87/////////////////////////////////////////////////////////////////////////////
88unsigned int _mwr_get_channel_register( unsigned int cluster_xy, // cluster
89                                        unsigned int channel,    // channel
90                                        unsigned int index )     // register
91{
92    unsigned int vaddr =
93        SEG_MWR_BASE + 
94        (cluster_xy * PERI_CLUSTER_INCREMENT) + 
95        ((channel + 1) * (CHANNEL_SPAN << 2)) +
96        (index << 2);
97
98    return ioread32( (void*)vaddr );
99}
100
101/////////////////////////////////////////////////////////////////////////////
102// This function sets a new value in a channel register
103// defined by the "index" and "channel") arguments, in the MWMR_DMA component
104// contained in cluster "cluster_xy".
105/////////////////////////////////////////////////////////////////////////////
106void _mwr_set_channel_register( unsigned int cluster_xy,  // cluster index
107                                unsigned int channel,     // channel index
108                                unsigned int index,       // register index
109                                unsigned int value )      // written value
110{
111    unsigned int vaddr =
112        SEG_MWR_BASE + 
113        (cluster_xy * PERI_CLUSTER_INCREMENT) +
114        ((channel + 1) * (CHANNEL_SPAN << 2)) +
115        (index << 2);
116       
117    iowrite32( (void*)vaddr, value );
118}
119
120///////////////////////////////////////////////////////
121void _mwr_isr( unsigned int irq_type,  // should be HWI
122               unsigned int irq_id,    // index returned by XCU
123               unsigned int channel )  // MWMR_DMA channel
124{
125    unsigned int gpid       = _get_procid();
126    unsigned int cluster_xy = gpid >> P_WIDTH;
127    unsigned int x          = cluster_xy >> Y_WIDTH;
128    unsigned int y          = cluster_xy & ((1<<Y_WIDTH)-1);
129
130    // acknowledge IRQ
131    _mwr_set_channel_register( cluster_xy, channel, CHANNEL_RUNNING, 0 );
132
133    // compute coproc_id from cluster coordinates
134    unsigned int coproc_id = x * Y_SIZE + y;
135
136    // set synchronisation variable
137    _coproc_done[coproc_id] = 1;
138}
139
140
141
142// Local Variables:
143// tab-width: 4
144// c-basic-offset: 4
145// c-file-offsets:((innamespace . 0)(inline-open . 0))
146// indent-tabs-mode: nil
147// End:
148// vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4
149
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