1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
|
/*===============================================================*\
| Project: RTEMS generic MPC5200 BSP |
+-----------------------------------------------------------------+
| Copyright (c) 2004-2005 |
| Embedded Brains GmbH |
| Obere Lagerstr. 30 |
| D-82178 Puchheim |
| Germany |
| rtems@embedded-brains.de |
+-----------------------------------------------------------------+
| The license and distribution terms for this file may be |
| found in the file LICENSE in this distribution or at |
| |
| http://www.rtems.org/license/LICENSE. |
| |
+-----------------------------------------------------------------+
| this file contains glue functions to the Freescale BestComm API |
\*===============================================================*/
#include <assert.h>
#include <rtems.h>
#include <bsp.h>
#include <bsp/irq.h>
#include "../include/mpc5200.h"
#include "include/ppctypes.h" /* uint32, et. al. */
#include "dma_image.h"
#include "task_api/bestcomm_cntrl.h"
#include "bestcomm_api.h"
#include "bestcomm_glue.h"
#include "include/mgt5200/sdma.h"
#include <rtems/score/heapimpl.h>
extern const uint32 taskTableBytes;
static Heap_Control bestcomm_heap;
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
void bestcomm_glue_irq_enable
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| enable interrupt for given task number |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
int bestcomm_taskno /* task number to enable */
)
/*-------------------------------------------------------------------------*\
| Return Value: |
| none |
\*=========================================================================*/
{
if (0 != ((1UL<<bestcomm_taskno) & SDMA_INT_BIT_IMPL)) {
/*
* valid task number
* enable interrupt in bestcomm mask
*/
SDMA_INT_ENABLE(&mpc5200.sdma.IntMask,bestcomm_taskno);
}
}
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
void bestcomm_glue_irq_disable
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| disable interrupt for given task number |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
int bestcomm_taskno /* task number to disable */
)
/*-------------------------------------------------------------------------*\
| Return Value: |
| none |
\*=========================================================================*/
{
if (0 != ((1UL<<bestcomm_taskno) & SDMA_INT_BIT_IMPL)) {
/*
* valid task number
* disable interrupt in bestcomm mask
*/
SDMA_INT_DISABLE(&mpc5200.sdma.IntMask,bestcomm_taskno);
}
}
typedef struct {
rtems_interrupt_handler handler;
void *arg;
} bestcomm_glue_irq_handlers_t;
static bestcomm_glue_irq_handlers_t bestcomm_glue_irq_handlers[32];
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
void bestcomm_glue_irq_install
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| install given function as bestcomm interrupt handler |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
int bestcomm_taskno, /* task number for handler */
rtems_interrupt_handler handler, /* function to call */
void *arg
)
/*-------------------------------------------------------------------------*\
| Return Value: |
| none |
\*=========================================================================*/
{
if (0 != ((1UL<<bestcomm_taskno) & SDMA_INT_BIT_IMPL)) {
/*
* valid task number
* install handler
*/
bestcomm_glue_irq_handlers[bestcomm_taskno].handler = handler;
bestcomm_glue_irq_handlers[bestcomm_taskno].arg = arg;
}
}
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
void bestcomm_glue_irq_dispatcher
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| general bestcomm interrupt handler/dispatcher |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
void *arg /* irq specific handle (not used) */
)
/*-------------------------------------------------------------------------*\
| Return Value: |
| none |
\*=========================================================================*/
{
uint32_t pending;
int curr_taskno;
pending = mpc5200.sdma.IntPend & ~mpc5200.sdma.IntMask;
curr_taskno = 0;
while (pending != 0) {
if ((pending & (1UL<<curr_taskno)) != 0) {
if (bestcomm_glue_irq_handlers[curr_taskno].handler != NULL) {
/*
* call proper handler
*/
bestcomm_glue_irq_handlers[curr_taskno].handler
(bestcomm_glue_irq_handlers[curr_taskno].arg);
}
else {
/*
* This should never happen. we have a pending IRQ but no handler
* let's clear this pending bit
*/
SDMA_CLEAR_IEVENT(&mpc5200.sdma.IntPend,curr_taskno);
}
/*
* clear this bit in our pending copy
* and go to next bit
*/
pending &= ~(1<<curr_taskno);
}
curr_taskno++;
}
}
static bool bestcomm_glue_is_initialized = false;
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
void bestcomm_glue_init
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| initialize the bestcomm module (if not yet done): |
| - load code |
| - initialize registers |
| - initialize bus arbiter |
| - initialize interrupt control |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
void /* none */
)
/*-------------------------------------------------------------------------*\
| Return Value: |
| none |
\*=========================================================================*/
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
uintptr_t heap_status = 0;
if (!bestcomm_glue_is_initialized) {
bestcomm_glue_is_initialized = true;
heap_status = _Heap_Initialize(
&bestcomm_heap,
(char *) &mpc5200.sram [0] + taskTableBytes,
sizeof(mpc5200.sram) - taskTableBytes,
4
);
assert(heap_status != 0);
/*
* Set task bar to begin of sram
*/
mpc5200.sdma.taskBar = (uint32_t)(&(mpc5200.sram[0]));
#if 0
/*
* Set core and BestComm XLB priority the same.
*/
mpc5200.priority_enable |= 0x5;
mpc5200.priority = 0x77777171;
#endif
/*
* Turn off COMM bus prefetch. This affects all data movements on
* the COMM bus. (Yes, _PE -- prefetch enable -- should probably be
* named _PD.)
*/
mpc5200.sdma.PtdCntrl |= SDMA_PTDCNTRL_PE;
TasksInitAPI((uint8*)&mpc5200);
TasksLoadImage( (void *)&(mpc5200.sdma.taskBar));
/*
* initialize interrupt dispatcher
*/
sc = rtems_interrupt_handler_install(
BSP_SIU_IRQ_SMARTCOMM,
"BESTCOMM",
RTEMS_INTERRUPT_UNIQUE,
bestcomm_glue_irq_dispatcher,
NULL
);
assert(sc == RTEMS_SUCCESSFUL);
}
}
void *bestcomm_malloc(size_t size)
{
return _Heap_Allocate(&bestcomm_heap, size);
}
void bestcomm_free(void *ptr)
{
if (ptr != NULL) {
bool ok = _Heap_Free(&bestcomm_heap, ptr);
assert(ok);
}
}
|
