source: soft/giet_vm/giet_drivers/icu_driver.c @ 331

Last change on this file since 331 was 320, checked in by alain, 10 years ago

All drivers have been modified to use only the information
contained in the hard_config.h file

File size: 4.4 KB
Line 
1///////////////////////////////////////////////////////////////////////////////////
2// File     : icu_driver.c
3// Date     : 23/05/2013
4// Author   : alain greiner
5// Copyright (c) UPMC-LIP6
6///////////////////////////////////////////////////////////////////////////////////
7// The icu_driver.c and icu_driver.h files are part ot the GIET-VM nano-kernel.
8// This driver supports the SoCLib vci_icu component, That is a vectorised
9// interrupt controler.
10//
11// It can exist several interrupt controller unit in the architecture
12// (one per cluster), and each one can contain several channels.
13// The number of ICU channels is equal to NB_PROCS_MAX, because there is
14// one private ICU channel per processor in a cluster.
15////////////////////////////////////////////////////////////////////////////////
16// The virtual base address of the segment associated to the component is:
17//      SEG_ICU_BASE + cluster_xy * VSEG_CLUSTER_INCREMENT
18//
19// SEG_ICU_BASE and VSEG_CLUSTER_INCREMENT must be defined in hard_config.h
20////////////////////////////////////////////////////////////////////////////////
21
22#include <giet_config.h>
23#include <icu_driver.h>
24#include <tty_driver.h>
25#include <utils.h>
26
27#if !defined(X_SIZE)
28# error: You must define X_SIZE in the hard_config.h file
29#endif
30
31#if !defined(Y_SIZE)
32# error: You must define X_SIZE in the hard_config.h file
33#endif
34
35#if !defined(X_WIDTH)
36# error: You must define X_WIDTH in the hard_config.h file
37#endif
38
39#if !defined(Y_WIDTH)
40# error: You must define X_WIDTH in the hard_config.h file
41#endif
42
43#if !defined(NB_PROCS_MAX)
44# error: You must define NB_PROCS_MAX in the hard_config.h file
45#endif
46
47#if !defined( USE_XCU )
48# error: You must define USE_XCU in the hard_config.h file
49#endif
50
51#if !defined(SEG_ICU_BASE)
52# error: You must define SEG_ICU_BASE in the hard_config.h file
53#endif
54
55#if !defined(VSEG_CLUSTER_INCREMENT)
56# error: You must define VSEG_CLUSTER_INCREMENT in the hard_config.h file
57#endif
58
59////////////////////////////////////////////////////////////////////////////////
60//     _icu_set_mask()
61// This function set the mask register for the ICU channel identified
62// by the cluster index and the processor index.
63// All '1' bits are set / all '0' bits are not modified.
64// Returns 0 if success, > 0 if error.
65////////////////////////////////////////////////////////////////////////////////
66unsigned int _icu_set_mask( unsigned int cluster_xy,
67                            unsigned int proc_id,
68                            unsigned int value )
69{
70    // parameters checking
71    unsigned int x = cluster_xy >> Y_WIDTH;
72    unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
73    if (x >= X_SIZE)             return 1; 
74    if (y >= Y_SIZE)             return 1; 
75    if (proc_id >= NB_PROCS_MAX) return 1; 
76
77#if USE_XCU
78    _printf("[GIET ERROR] _icu_set_mask() should not be used if USE_XICU is set\n");
79    return 1;
80#else
81    unsigned int * icu_address = (unsigned int *) ( SEG_ICU_BASE + 
82                                 (cluster_xy * VSEG_CLUSTER_INCREMENT) );
83    icu_address[proc_id * ICU_SPAN + ICU_MASK_SET] = value; 
84    return 0;
85#endif
86}
87
88////////////////////////////////////////////////////////////////////////////////
89//     _icu_get_index()
90// This function returns the index of the highest priority (smaller index) IRQ.
91// The ICU channel is identified by the cluster index and the processor index.
92// Returns 0 if success, > 0 if error.
93////////////////////////////////////////////////////////////////////////////////
94unsigned int _icu_get_index( unsigned int cluster_xy, 
95                             unsigned int proc_id, 
96                             unsigned int * buffer) 
97{
98    // parameters checking
99    unsigned int x = cluster_xy >> Y_WIDTH;
100    unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
101    if (x >= X_SIZE)             return 1; 
102    if (y >= Y_SIZE)             return 1; 
103    if (proc_id >= NB_PROCS_MAX) return 1;
104
105#if USE_XCU
106    _printf("[GIET ERROR] _icu_set_mask() should not be used if USE_XICU is set\n");
107    return 1;
108#else
109    unsigned int * icu_address = (unsigned int *) ( SEG_ICU_BASE + 
110                                 (cluster_xy * VSEG_CLUSTER_INCREMENT) );
111    *buffer = icu_address[proc_id * ICU_SPAN + ICU_IT_VECTOR]; 
112    return 0;
113#endif
114}
115
116
117// Local Variables:
118// tab-width: 4
119// c-basic-offset: 4
120// c-file-offsets:((innamespace . 0)(inline-open . 0))
121// indent-tabs-mode: nil
122// End:
123// vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4
124
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