osd-contiki/cpu/x86/quarkX1000_dma.ld

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/*
* Copyright (C) 2015-2016, Intel Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
SECTIONS {
.bss.dma (NOLOAD) : AT(_ebss_pre_dma_addr) ALIGN (32)
{
/* IMRs are used to restrict DMA, and they require 1K physical address alignment. */
. += ALIGN(_ebss_pre_dma_addr, 1K) - ALIGN(_ebss_pre_dma_addr, 32);
*(.dma_bss)
}
_sbss_dma_addr = LOADADDR(.bss.dma) + ALIGN(_ebss_pre_dma_addr, 1K) - ALIGN(_ebss_pre_dma_addr, 32);
/*
Effectively pointing beyond the end of .bss.dma is acceptable, since
.bss.dma is the last section in memory.
*/
_ebss_dma_addr = ALIGN(LOADADDR(.bss.dma) + SIZEOF(.bss.dma), 1K);
}