source: trunk/hal/tsar_mips32/drivers/soclib_fbf.c

Last change on this file was 679, checked in by alain, 18 months ago

Mainly cosmetic.

File size: 5.5 KB
Line 
1/*
2 * soclib_fbf.c - soclib frame-buffer driver implementation.
3 *
4 * Author Alain greiner (2016,2017,2018,2019,2020)
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 <soclib_fbf.h>
25#include <hal_kernel_types.h>
26#include <hal_uspace.h>
27#include <chdev.h>
28#include <dev_fbf.h>
29#include <printk.h>
30#include <thread.h>
31
32///////////////////////////////////////
33void soclib_fbf_init( chdev_t * chdev )
34{
35    // set driver specific fields in FBF chdev
36    chdev->cmd = &soclib_fbf_cmd;
37    chdev->isr = NULL;
38
39    // get extended pointer on SOCLIB_FBF peripheral segment base
40        xptr_t  base_xp = chdev->base;
41
42    // get cluster and local pointer for the SOCLIB_FBF peripheral segment
43    cxy_t      base_cxy  = GET_CXY( base_xp );
44    uint32_t * base_ptr  = GET_PTR( base_xp );
45
46    // get frame buffer width, height, and type 
47        uint32_t width  = hal_remote_l32( XPTR( base_cxy , base_ptr + FBF_WIDTH_REG ) );
48        uint32_t height = hal_remote_l32( XPTR( base_cxy , base_ptr + FBF_HEIGHT_REG ) );
49    uint32_t type   = hal_remote_l32( XPTR( base_cxy , base_ptr + FBF_SUBSAMPLING_REG ) );
50
51    // set FBF chdev extension fields
52    chdev->ext.fbf.width       = width;
53    chdev->ext.fbf.height      = height;
54    chdev->ext.fbf.subsampling = type;
55
56}  // end soclib_fbf_init()
57
58/////////////////////////////////////////////////////////////////
59void __attribute__((noinline)) soclib_fbf_cmd( xptr_t thread_xp )
60{
61    uint32_t   type;        // USER_WRITE / USER_READ / KERNEL_WRITE / KERNEL_READ
62    uint32_t   offset;      // offset in FBF (in pixels)
63    uint32_t   npixels;     // number of pixels to move
64    xptr_t     fbf_xp;      // extended pointer on FBF chdev descriptor
65    void     * buffer;      // pointer on kernel or user buffer
66
67    // get client thread cluster and local pointer
68    cxy_t      th_cxy = GET_CXY( thread_xp );
69    thread_t * th_ptr = GET_PTR( thread_xp );
70
71#if (DEBUG_HAL_FBF|| DEBUG_HAL_FBF)
72uint32_t    cycle        = (uint32_t)hal_get_cycles();
73process_t * process      = hal_remote_lpt( XPTR( th_cxy , &th_ptr->process ) );
74pid_t       client_pid   = hal_remote_l32( XPTR( th_cxy , &process->pid ) );
75trdid_t     client_trdid = hal_remote_l32( XPTR( th_cxy , &th_ptr->trdid ) );
76#endif
77
78    // get command arguments
79    type     = hal_remote_l32( XPTR( th_cxy , &th_ptr->fbf_cmd.type    ) );
80    offset   = hal_remote_l32( XPTR( th_cxy , &th_ptr->fbf_cmd.offset  ) );
81    npixels  = hal_remote_l32( XPTR( th_cxy , &th_ptr->fbf_cmd.npixels ) );
82    fbf_xp   = hal_remote_l64( XPTR( th_cxy , &th_ptr->fbf_cmd.dev_xp  ) );
83    buffer   = hal_remote_lpt( XPTR( th_cxy , &th_ptr->fbf_cmd.buffer  ) );
84
85    // get cluster and local pointer on FBF chdev
86    cxy_t     fbf_cxy = GET_CXY( fbf_xp );
87    chdev_t * fbf_ptr = GET_PTR( fbf_xp );
88
89    // get extended pointer on SOCLIB_FBF peripheral segment base
90        xptr_t  base_xp = (xptr_t)hal_remote_l64( XPTR( fbf_cxy , &fbf_ptr->base ) );
91
92    // execute command
93    if( type == FBF_DRIVER_USER_WRITE )     // user_buffer => FBF
94    {
95
96#if DEBUG_HAL_FBF
97if( DEBUG_HAL_FBF < cycle )
98printk("\n[%s] client thread[%x,%x] / USER_WRITE / offset %d / npixels %d / buf %x\n",
99__FUNCTION__ , client_pid, client_trdid, offset, npixels, buffer );
100#endif
101        hal_copy_from_uspace( base_xp + offset,
102                              buffer,
103                              npixels );
104    }
105    else if( type == FBF_DRIVER_USER_READ )  // FBF => user_buffer
106    {
107
108#if DEBUG_HAL_FBF
109if( DEBUG_HAL_FBF < cycle )
110printk("\n[%s] client thread[%x,%x] / USER_READ / offset %d / npixels %d / buf %x\n",
111__FUNCTION__ , client_pid, client_trdid, offset, npixels, buffer );
112#endif
113        hal_copy_to_uspace( buffer,
114                            base_xp + offset,
115                            npixels );
116    }
117    else if( type == FBF_DRIVER_KERNEL_WRITE )  // kernel_buffer => FBF
118    {
119
120#if DEBUG_HAL_FBF
121if( DEBUG_HAL_FBF < cycle )
122printk("\n[%s] client thread[%x,%x] / KERNEL_WRITE / offset %d / npixels %d / buf %x\n",
123__FUNCTION__ , client_pid, client_trdid, offset, npixels, buffer );
124#endif
125        hal_remote_memcpy( base_xp + offset,
126                           XPTR( local_cxy , buffer ),
127                           npixels );
128    }
129    else if( type == FBF_DRIVER_KERNEL_READ )  // FBF => kernel_buffer
130    {
131
132#if DEBUG_HAL_FBF
133if( DEBUG_HAL_FBF < cycle )
134printk("\n[%s] client thread[%x,%x] / KERNEL_READ / offset %d / npixels %d / buf %x\n",
135__FUNCTION__ , client_pid, client_trdid, offset, npixels, buffer );
136#endif
137        hal_remote_memcpy( XPTR( local_cxy , buffer ),
138                           base_xp + offset,
139                           npixels );
140    }
141
142    // set success in command
143    hal_remote_s32( XPTR( th_cxy , &th_ptr->fbf_cmd.error ) , 0 );
144
145#if DEBUG_HAL_FBF
146if( DEBUG_HAL_FBF < cycle )
147printk("\n[%s] client thread[%x,%x] / successful move / cycle %d\n",
148__FUNCTION__ , client_pid, client_trdid , cycle );
149#endif
150           
151}  // end soclib_fbf_cmd()
152
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