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68 lines
2 KiB
C
68 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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* MPC8220 dma header file
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*/
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#ifndef __MPC8220_DMA_H
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#define __MPC8220_DMA_H
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#include <common.h>
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#include <mpc8220.h>
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/* Task number assignment */
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#define FEC_RECV_TASK_NO 0
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#define FEC_XMIT_TASK_NO 1
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/*---------------------------------------------------------------------
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* Stuff for Ethernet Tx/Rx tasks
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*---------------------------------------------------------------------
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*/
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/* Layout of Ethernet controller Parameter SRAM area:
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* ----------------------------------------------------------------
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* 0x00: TBD_BASE, base address of TX BD ring
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* 0x04: TBD_NEXT, address of next TX BD to be processed
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* 0x08: RBD_BASE, base address of RX BD ring
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* 0x0C: RBD_NEXT, address of next RX BD to be processed
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* ---------------------------------------------------------------
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* ALL PARAMETERS ARE ALL LONGWORDS (FOUR BYTES EACH).
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*/
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/* base address of SRAM area to store parameters used by Ethernet tasks */
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#define FEC_PARAM_BASE (MMAP_SRAM + 0x5b00)
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/* base address of SRAM area for buffer descriptors */
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#define FEC_BD_BASE (MMAP_SRAM + 0x5b20)
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/*---------------------------------------------------------------------
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* common shortcuts used by driver C code
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*---------------------------------------------------------------------
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*/
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/* Disable SmartDMA task */
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#define DMA_TASK_DISABLE(tasknum) \
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{ \
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volatile ushort *tcr = (ushort *)(MMAP_DMA + 0x0000001c + 2 * tasknum); \
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*tcr = (*tcr) & (~0x8000); \
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}
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/* Enable SmartDMA task */
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#define DMA_TASK_ENABLE(tasknum) \
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{ \
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volatile ushort *tcr = (ushort *) (MMAP_DMA + 0x0000001c + 2 * tasknum);\
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*tcr = (*tcr) | 0x8000; \
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}
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/* Clear interrupt pending bits */
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#define DMA_CLEAR_IEVENT(tasknum) \
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{ \
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struct mpc8220_dma *dma = (struct mpc8220_dma *)MMAP_DMA; \
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dma->IntPend = (1 << tasknum); \
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}
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#endif /* __MPC8220_DMA_H */
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