/* * (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"); }