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/*===============================================================*\
| 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.com/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);
}
}
|
