79 lines
2.0 KiB
C
79 lines
2.0 KiB
C
|
/*
|
||
|
|
* (C) Copyright 2003
|
||
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
||
|
|
*
|
||
|
|
* This file is based on code
|
||
|
|
* (C) Copyright Motorola, Inc., 2000
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <common.h>
|
||
|
|
#include <mpc8220.h>
|
||
|
|
|
||
|
|
/* Multichannel DMA microcode */
|
||
|
|
extern int taskTable;
|
||
|
|
|
||
|
|
void loadtask (int basetask, int tasks)
|
||
|
|
{
|
||
|
|
int *sram = (int *) (MMAP_SRAM + 512);
|
||
|
|
int *task_org = &taskTable;
|
||
|
|
unsigned int start, offset, end;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
#ifdef DEBUG
|
||
|
|
printf ("basetask = %d, tasks = %d\n", basetask, tasks);
|
||
|
|
printf ("task_org = 0x%08x\n", (unsigned int) task_org);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* setup TaskBAR register */
|
||
|
|
*(vu_long *) MMAP_DMA = (MMAP_SRAM + 512);
|
||
|
|
|
||
|
|
/* relocate task table entries */
|
||
|
|
offset = (unsigned int) sram;
|
||
|
|
for (i = basetask; i < basetask + tasks; i++) {
|
||
|
|
sram[i * 8 + 0] = task_org[i * 8 + 0] + offset;
|
||
|
|
sram[i * 8 + 1] = task_org[i * 8 + 1] + offset;
|
||
|
|
sram[i * 8 + 2] = task_org[i * 8 + 2] + offset;
|
||
|
|
sram[i * 8 + 3] = task_org[i * 8 + 3] + offset;
|
||
|
|
sram[i * 8 + 4] = task_org[i * 8 + 4];
|
||
|
|
sram[i * 8 + 5] = task_org[i * 8 + 5];
|
||
|
|
sram[i * 8 + 6] = task_org[i * 8 + 6] + offset;
|
||
|
|
sram[i * 8 + 7] = task_org[i * 8 + 7];
|
||
|
|
}
|
||
|
|
|
||
|
|
/* relocate task descriptors */
|
||
|
|
start = (sram[basetask * 8] - (unsigned int) sram);
|
||
|
|
end = (sram[(basetask + tasks - 1) * 8 + 1] - (unsigned int) sram);
|
||
|
|
|
||
|
|
#ifdef DEBUG
|
||
|
|
printf ("TDT start = 0x%08x, end = 0x%08x\n", start, end);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
start /= 4;
|
||
|
|
end /= 4;
|
||
|
|
for (i = start; i <= end; i++) {
|
||
|
|
sram[i] = task_org[i];
|
||
|
|
}
|
||
|
|
|
||
|
|
/* relocate variables */
|
||
|
|
start = (sram[basetask * 8 + 2] - (unsigned int) sram);
|
||
|
|
end = (sram[(basetask + tasks - 1) * 8 + 2] + 256 -
|
||
|
|
(unsigned int) sram);
|
||
|
|
start /= 4;
|
||
|
|
end /= 4;
|
||
|
|
for (i = start; i < end; i++) {
|
||
|
|
sram[i] = task_org[i];
|
||
|
|
}
|
||
|
|
|
||
|
|
/* relocate function decriptors */
|
||
|
|
start = ((sram[basetask * 8 + 3] & 0xfffffffc) - (unsigned int) sram);
|
||
|
|
end = ((sram[(basetask + tasks - 1) * 8 + 3] & 0xfffffffc) + 256 -
|
||
|
|
(unsigned int) sram);
|
||
|
|
start /= 4;
|
||
|
|
end /= 4;
|
||
|
|
for (i = start; i < end; i++) {
|
||
|
|
sram[i] = task_org[i];
|
||
|
|
}
|
||
|
|
|
||
|
|
asm volatile ("sync");
|
||
|
|
}
|