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