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/*
* (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");
}
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