source: trunk/kernel/devices/dev_mmc.c @ 407

Last change on this file since 407 was 407, checked in by alain, 4 years ago

First implementation of fork/exec.

File size: 7.3 KB
Line 
1/*
2 * dev_mmc.c - MMC (Memory Cache Controler) generic device API implementation.
3 *
4 * Author  Alain Greiner    (2016)
5 *
6 * Copyright (c) UPMC Sorbonne Universites
7 *
8 * This file is part of ALMOS-MK
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-kernel; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24#include <hal_types.h>
25#include <hal_special.h>
26#include <hal_drivers.h>
27#include <printk.h>
28#include <chdev.h>
29#include <thread.h>
30#include <dev_mmc.h>
31
32/////////////////////////////////////////////////////////////////////////////////////////
33// Extern global variables
34/////////////////////////////////////////////////////////////////////////////////////////
35
36extern chdev_directory_t  chdev_dir;         // allocated in kernel_init.c
37
38//////////////////////////////////
39void dev_mmc_init( chdev_t * mmc )
40{
41    // get implementation from device descriptor
42    uint32_t  impl = mmc->impl;
43
44    // set mmc name
45    snprintf( mmc->name , 16 , "mmc_%x" , local_cxy );
46
47    // call driver init function
48    hal_drivers_mmc_init( mmc , impl );
49
50    // bind IRQ to CP0
51    dev_pic_bind_irq( 0 , mmc );
52   
53    // enable IRQ
54    dev_pic_enable_irq( 0 , XPTR( local_cxy , mmc ) );
55
56}  // end dev_mmc_init()
57
58/////////////////////////////////////////////////////////////////////////////
59// This static function is called by all MMC device functions.
60// It makes some checking, takes the lock granting exclusive
61// access to MMC peripheral, call the driver to execute the command
62// registered in the calling thread descriptor, and releases the lock.
63/////////////////////////////////////////////////////////////////////////////
64static error_t dev_mmc_access( thread_t * this )
65{
66    // get extended pointer on MMC device descriptor
67    xptr_t  dev_xp = this->mmc_cmd.dev_xp;
68
69    assert( (dev_xp != XPTR_NULL) , __FUNCTION__ , "target MMC device undefined" );
70
71    // get MMC device cluster identifier & local pointer
72    cxy_t     dev_cxy = GET_CXY( dev_xp );
73    chdev_t * dev_ptr = (chdev_t *)GET_PTR( dev_xp );
74
75    // get driver command function pointer from MMC device descriptor
76    dev_cmd_t * cmd = (dev_cmd_t *)hal_remote_lpt( XPTR( dev_cxy , &dev_ptr->cmd ) );
77
78    // get the MMC device remote spinlock
79    remote_spinlock_lock( XPTR( dev_cxy , &dev_ptr->wait_lock ) ); 
80
81    // call driver command
82    cmd( XPTR( local_cxy , this ) );
83   
84    // release the MMC device remote spinlock
85    remote_spinlock_unlock( XPTR( dev_cxy , &dev_ptr->wait_lock ) ); 
86
87    // return operation status
88    return this->mmc_cmd.error; 
89
90}  // end dev_mmc_access()
91
92/////////////////////////////////////////
93error_t dev_mmc_inval( xptr_t     buf_xp,
94                       uint32_t   buf_size )
95{
96    error_t error;
97
98    // get calling thread local pointer
99    thread_t * this = CURRENT_THREAD;
100
101    mmc_dmsg("\n[DBG] %s enters for thread %x in process %x / buf_xp = %l\n", 
102                 __FUNCTION__ , this->trdid , this->process->pid , buf_xp );
103
104    // get buffer cluster and local pointer
105    cxy_t  buf_cxy = GET_CXY( buf_xp );
106    void * buf_ptr = GET_PTR( buf_xp );
107   
108    assert( (((intptr_t)buf_ptr & (CONFIG_CACHE_LINE_SIZE -1)) == 0) , __FUNCTION__ ,
109             "buffer not aligned on cache line" );
110
111    // get buffer physical address
112    paddr_t  buf_paddr;
113    error = vmm_v2p_translate( CONFIG_KERNEL_IDENTITY_MAP , buf_ptr , &buf_paddr ); 
114
115    assert( (error == 0) , __FUNCTION__ , "cannot get buffer paddr" );
116
117    // store command arguments in thread descriptor
118    this->mmc_cmd.dev_xp    = chdev_dir.mmc[buf_cxy];
119    this->mmc_cmd.type      = MMC_CC_INVAL;
120    this->mmc_cmd.buf_paddr = buf_paddr;
121    this->mmc_cmd.buf_size  = buf_size;
122
123    // call MMC driver
124    error = dev_mmc_access( this );
125
126    mmc_dmsg("\n[DBG] %s completes for thread %x in process %x / error = %d\n", 
127             __FUNCTION__ , this->trdid , this->process->pid , error );
128
129    return error;
130}
131
132////////////////////////////////////////
133error_t dev_mmc_sync( xptr_t     buf_xp,
134                      uint32_t   buf_size )
135{
136    error_t error;
137
138    // get calling thread local pointer
139    thread_t * this = CURRENT_THREAD;
140
141    mmc_dmsg("\n[DBG] %s enters for thread %x in process %x / buf_xp = %l\n", 
142                 __FUNCTION__ , this->trdid , this->process->pid , buf_xp );
143
144    // get buffer cluster and local pointer
145    cxy_t  buf_cxy = GET_CXY( buf_xp );
146    void * buf_ptr = GET_PTR( buf_xp );
147   
148    assert( (((intptr_t)buf_ptr & (CONFIG_CACHE_LINE_SIZE -1)) == 0) , __FUNCTION__ ,
149             "buffer not aligned on cache line" );
150
151    // get  buffer physical address
152    paddr_t  buf_paddr;
153    error = vmm_v2p_translate( CONFIG_KERNEL_IDENTITY_MAP , buf_ptr , &buf_paddr ); 
154
155    assert( (error == 0) , __FUNCTION__ , "cannot get buffer paddr" );
156
157    // store command arguments in thread descriptor
158    this->mmc_cmd.dev_xp    = chdev_dir.mmc[buf_cxy];
159    this->mmc_cmd.type      = MMC_CC_SYNC;
160    this->mmc_cmd.buf_paddr = buf_paddr;
161    this->mmc_cmd.buf_size  = buf_size;
162
163    // call MMC driver
164    error = dev_mmc_access( this );
165
166    mmc_dmsg("\n[DBG] %s completes for thread %x in process %x / error = %d\n", 
167                 __FUNCTION__ , this->trdid , this->process->pid , error );
168
169    return error;
170}
171
172/////////////////////////////////////////
173error_t dev_mmc_set_error( cxy_t     cxy,
174                           uint32_t  index,
175                           uint32_t  wdata )
176{
177    // get calling thread local pointer
178    thread_t * this = CURRENT_THREAD;
179
180    // store command arguments in thread descriptor
181    this->mmc_cmd.dev_xp    = chdev_dir.mmc[cxy];
182    this->mmc_cmd.type      = MMC_SET_ERROR;
183    this->mmc_cmd.reg_index = index;
184    this->mmc_cmd.reg_ptr   = &wdata;
185
186    // execute operation
187    return dev_mmc_access( this ); 
188}
189                       
190//////////////////////////////////////////
191error_t dev_mmc_get_error( cxy_t      cxy,
192                           uint32_t   index,
193                           uint32_t * rdata )
194{
195    // get calling thread local pointer
196    thread_t * this = CURRENT_THREAD;
197
198    // store command arguments in thread descriptor
199    this->mmc_cmd.dev_xp    = chdev_dir.mmc[cxy];
200    this->mmc_cmd.type      = MMC_GET_ERROR;
201    this->mmc_cmd.reg_index = index;
202    this->mmc_cmd.reg_ptr   = rdata;
203
204    // execute operation
205    return dev_mmc_access( this ); 
206}
207                       
208////////////////////////////////////////////////////
209error_t dev_mmc_get_instrumentation( cxy_t      cxy,
210                                     uint32_t   index,
211                                     uint32_t * rdata )
212{
213    // get calling thread local pointer
214    thread_t * this = CURRENT_THREAD;
215
216    // store command arguments in thread descriptor
217    this->mmc_cmd.dev_xp    = chdev_dir.mmc[cxy];
218    this->mmc_cmd.type      = MMC_GET_INSTRU;
219    this->mmc_cmd.reg_index = index;
220    this->mmc_cmd.reg_ptr   = rdata;
221
222    // execute operation
223    return dev_mmc_access( this ); 
224}
225
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