3a262416d6
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5146 42af7a65-404d-4744-a932-0658087f49c3
101 lines
3.9 KiB
C
101 lines
3.9 KiB
C
/************************************************************************
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* arch/arm/src/lpc31xx/lpc31_bcrndx.c
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*
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* Copyright (C) 2009-2010 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* References:
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* - UM10314 LPC3130/31 User manual Rev. 1.01 — 9 September 2009
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* - lpc313x.cdl.drivers.zip example driver code
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************/
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/************************************************************************
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* Included Files
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************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include "up_arch.h"
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#include "lpc31_cgudrvr.h"
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/************************************************************************
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* Pre-processor Definitions
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************************************************************************/
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/************************************************************************
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* Private Data
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************************************************************************/
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/************************************************************************
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* Private Functions
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************************************************************************/
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/************************************************************************
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* Public Functions
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************************************************************************/
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/************************************************************************
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* Name: lpc31_bcrndx
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*
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* Description:
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* Only 5 of the 12 domains have an associated BCR register. This
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* function returns the index to the associated BCR register (if any)
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* or BCRNDX_INVALID otherwise.
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*
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************************************************************************/
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int lpc31_bcrndx(enum lpc31_domainid_e dmnid)
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{
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switch (dmnid)
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{
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/* BCR0-3 correspond directly to domains 0-3 */
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case DOMAINID_SYS: /* Domain 0: SYS_BASE */
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case DOMAINID_AHB0APB0: /* Domain 1: AHB0APB0_BASE */
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case DOMAINID_AHB0APB1: /* Domain 2: AHB0APB1_BASE */
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case DOMAINID_AHB0APB2: /* Domain 3: AHB0APB2_BASE */
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return (int)dmnid;
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/* There is a BCR register corresponding to domain 7, but it is at
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* index 4
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*/
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case DOMAINID_CLK1024FS: /* Domain 7: CLK1024FS_BASE */
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return 4;
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default: /* There is no BCR register for the other
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* domains. */
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break;
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}
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return BCRNDX_INVALID;
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}
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