source: soft/giet_vm/giet_drivers/mwr_driver.c @ 329

Last change on this file since 329 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: 4.0 KB
Line 
1///////////////////////////////////////////////////////////////////////////////////
2// File     : mwr_driver.c
3// Date     : 23/05/2013
4// Author   : alain greiner
5// Copyright (c) UPMC-LIP6
6///////////////////////////////////////////////////////////////////////////////////
7// The mwmr_driver.c and mwmr_driver.h files are part ot the GIET-VM nano-kernel.
8// This driver supports the SoClib vci_mwmr_controller component.
9//
10// This peripheral can be replicated (at most one component per cluster).
11//
12// The (virtual) base address of the associated segment is:
13//       SEG_MWR_BASE + cluster_xy * VSEG_CLUSTER_INCREMENT
14//
15// SEG_MWR_BASE and VSEG_CLUSTER_INCREMENT must be defined in hard_config.h
16////////////////////////////////////////////////////////////////////////////////
17
18#include <giet_config.h>
19#include <hard_config.h>
20#include <mwr_driver.h>
21#include <utils.h>
22
23#if !defined(X_SIZE)
24# error: You must define X_SIZE in the hard_config.h file
25#endif
26
27#if !defined(Y_SIZE)
28# error: You must define X_SIZE in the hard_config.h file
29#endif
30
31#if !defined(X_WIDTH)
32# error: You must define X_WIDTH in the hard_config.h file
33#endif
34
35#if !defined(Y_WIDTH)
36# error: You must define X_WIDTH in the hard_config.h file
37#endif
38
39#if !defined(SEG_MWR_BASE)
40# error: You must define SEG_MWR_BASE in the hard_config.h file
41#endif
42
43#if !defined(VSEG_CLUSTER_INCREMENT)
44# error: You must define VSEG_CLUSTER_INCREMENT in the hard_config.h file
45#endif
46
47//////////////////////////////////////////////////////////////////////////////////
48//    _mwr_hw_init()
49// This function initializes one MWMR controller channel (i.e. one coprocessor
50// port) in a given cluster.
51// - cluster_xy    : cluster index
52// _ port_id       : port index
53// - way           : direction (to_coproc/from_coproc)
54// - channel_pbase : physical base address of the MWMR channel
55// TODO : The MWMR controler should be modified to support 40 bits addresses...
56//        Introduce a MWMR_CONFIG_PADDR_EXT register in the MWMR coprocessor
57//////////////////////////////////////////////////////////////////////////////////
58// Returns 0 if success, returns > 0 if error.
59//////////////////////////////////////////////////////////////////////////////////
60unsigned int _mwr_hw_init( unsigned int           cluster_xy, 
61                           unsigned int           port_id, 
62                           unsigned int           from_coproc,
63                           paddr_t                channel_pbase ) 
64{
65    _printf(" [GIET_ERROR] _mwr_hw_init() function not supported yet\n");
66    _exit();
67
68/*
69    // parameters checking
70    unsigned int x = cluster_xy >> Y_WIDTH;
71    unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
72    if (x >= X_SIZE)                    return 1;
73    if (y >= Y_SIZE)                    return 1;
74
75    // compute base address
76    unsigned int* mwr_address = (unsigned int*) ( SEG_MWR_BASE +
77                                 (cluster_xy * VSEG_CLUSTER_INCREMENT) );
78
79    unsigned int lsb = (unsigned int)channel_pbase;
80    unsigned int msb = (unsigned int)(channel_pbase>>32);
81
82    // get depth and width from channel itself
83    unsigned int depth = _physical_read( channel_pbase + 16 );
84    unsigned int width = _physical_read( channel_pbase + 20 );
85
86    // initializes and launches mwmr controler
87    mwr_address[port_id * MWMR_SPAN + MWMR_CONFIG_FIFO_WAY]  = from_coproc;
88    mwr_address[port_id * MWMR_SPAN + MWMR_CONFIG_FIFO_NO]   = port_id;
89    mwr_address[port_id * MWMR_SPAN + MWMR_CONFIG_WIDTH]     = width;
90    mwr_address[port_id * MWMR_SPAN + MWMR_CONFIG_DEPTH]     = depth;
91    mwr_address[port_id * MWMR_SPAN + MWMR_CONFIG_STATUS]    = lsb;
92    mwr_address[port_id * MWMR_SPAN + MWMR_CONFIG_DATA]      = lsb + 24;
93    mwr_address[port_id * MWMR_SPAN + MWMR_CONFIG_EXT]       = msb;
94    mwr_address[port_id * MWMR_SPAN + MWMR_CONFIG_RUNNING]   = 1;
95*/
96    return 0;
97}
98
99
100// Local Variables:
101// tab-width: 4
102// c-basic-offset: 4
103// c-file-offsets:((innamespace . 0)(inline-open . 0))
104// indent-tabs-mode: nil
105// End:
106// vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4
107
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