source: soft/giet_vm/giet_drivers/icu_driver.c @ 284

Last change on this file since 284 was 263, checked in by alain, 11 years ago

Introducing support for TSAR fixed format cluster index (cluster_xy)
We have now 4 parameters defined in map.xml:

  • X_WIDTH, Y_WIDTH define the fixed format (typically X_WIDTH = 4 / Y_WIDTH = 4)
  • X_SIZE, Y_SIZE define the actual TSAR 2D mesh variable size (from 1 to 16)
File size: 4.2 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//
18//      seg_icu_base + cluster_xy * vseg_cluster_increment
19//
20// The seg_icu_base and vseg_cluster_increment values must be defined
21// in giet_vsegs.ld file.
22////////////////////////////////////////////////////////////////////////////////
23
24#include <giet_config.h>
25#include <icu_driver.h>
26#include <tty_driver.h>
27#include <utils.h>
28
29#if !defined(X_SIZE)
30# error: You must define X_SIZE in the hard_config.h file
31#endif
32
33#if !defined(Y_SIZE)
34# error: You must define X_SIZE in the hard_config.h file
35#endif
36
37#if !defined(X_WIDTH)
38# error: You must define X_WIDTH in the hard_config.h file
39#endif
40
41#if !defined(Y_WIDTH)
42# error: You must define X_WIDTH in the hard_config.h file
43#endif
44
45#if !defined(NB_PROCS_MAX)
46# error: You must define NB_PROCS_MAX in the hard_config.h file
47#endif
48
49#if !defined( USE_XICU )
50# error: You must define USE_XICU in the hard_config.h file
51#endif
52
53////////////////////////////////////////////////////////////////////////////////
54//     _icu_set_mask()
55// This function set the mask register for the ICU channel identified
56// by the cluster index and the processor index.
57// All '1' bits are set / all '0' bits are not modified.
58// Returns 0 if success, > 0 if error.
59////////////////////////////////////////////////////////////////////////////////
60unsigned int _icu_set_mask( unsigned int cluster_xy,
61                            unsigned int proc_id,
62                            unsigned int value )
63{
64    // parameters checking
65    unsigned int x = cluster_xy >> Y_WIDTH;
66    unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
67    if (x >= X_SIZE)             return 1; 
68    if (y >= Y_SIZE)             return 1; 
69    if (proc_id >= NB_PROCS_MAX) return 1; 
70
71#if USE_XICU
72    _puts("[GIET ERROR] _icu_set_mask() should not be used if USE_XICU is set\n");
73    return 1;
74#else
75    unsigned int * icu_address = (unsigned int *) ((unsigned int)&seg_icu_base + 
76                                 (cluster_xy * (unsigned int)&vseg_cluster_increment));
77    icu_address[proc_id * ICU_SPAN + ICU_MASK_SET] = value; 
78    return 0;
79#endif
80}
81
82////////////////////////////////////////////////////////////////////////////////
83//     _icu_get_index()
84// This function returns the index of the highest priority (smaller index) IRQ.
85// The ICU channel is identified by the cluster index and the processor index.
86// Returns 0 if success, > 0 if error.
87////////////////////////////////////////////////////////////////////////////////
88unsigned int _icu_get_index( unsigned int cluster_xy, 
89                             unsigned int proc_id, 
90                             unsigned int * buffer) 
91{
92    // parameters checking
93    unsigned int x = cluster_xy >> Y_WIDTH;
94    unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
95    if (x >= X_SIZE)             return 1; 
96    if (y >= Y_SIZE)             return 1; 
97    if (proc_id >= NB_PROCS_MAX) return 1;
98
99#if USE_XICU
100    _puts("[GIET ERROR] _icu_get_index() should not be used if USE_XICU is set\n");
101    return 1;
102#else
103    unsigned int* icu_address = (unsigned int *) ((unsigned int)&seg_icu_base + 
104                                 (cluster_xy * (unsigned int)&vseg_cluster_increment));
105    *buffer = icu_address[proc_id * ICU_SPAN + ICU_IT_VECTOR]; 
106    return 0;
107#endif
108}
109
110
111// Local Variables:
112// tab-width: 4
113// c-basic-offset: 4
114// c-file-offsets:((innamespace . 0)(inline-open . 0))
115// indent-tabs-mode: nil
116// End:
117// vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4
118
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