5ba766752d
When possible, work around anomaly 05000220 (external memory is write back cached, but L2 is not cached). If not possible, detect the conditions at build time and reject any qualifying configurations. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
80 lines
2.9 KiB
C
80 lines
2.9 KiB
C
/*
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* File: arch/blackfin/mach-common/arch_checks.c
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* Based on:
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* Author: Robin Getz <rgetz@blackfin.uclinux.org>
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*
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* Created: 25Jul07
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* Description: Do some checking to make sure things are OK
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*
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* Modified:
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* Copyright 2004-2007 Analog Devices Inc.
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*
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* Bugs: Enter bugs at http://blackfin.uclinux.org/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see the file COPYING, or write
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* to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <asm/fixed_code.h>
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#include <mach/anomaly.h>
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#include <asm/clocks.h>
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#ifdef CONFIG_BFIN_KERNEL_CLOCK
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# if (CONFIG_VCO_HZ > CONFIG_MAX_VCO_HZ)
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# error "VCO selected is more than maximum value. Please change the VCO multipler"
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# endif
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# if (CONFIG_SCLK_HZ > CONFIG_MAX_SCLK_HZ)
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# error "Sclk value selected is more than maximum. Please select a proper value for SCLK multiplier"
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# endif
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# if (CONFIG_SCLK_HZ < CONFIG_MIN_SCLK_HZ)
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# error "Sclk value selected is less than minimum. Please select a proper value for SCLK multiplier"
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# endif
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# if (ANOMALY_05000273) && (CONFIG_SCLK_HZ * 2 > CONFIG_CCLK_HZ)
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# error "ANOMALY 05000273, please make sure CCLK is at least 2x SCLK"
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# endif
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# if (CONFIG_SCLK_HZ > CONFIG_CCLK_HZ) && (CONFIG_SCLK_HZ != CONFIG_CLKIN_HZ) && (CONFIG_CCLK_HZ != CONFIG_CLKIN_HZ)
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# error "Please select sclk less than cclk"
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# endif
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#endif /* CONFIG_BFIN_KERNEL_CLOCK */
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#if CONFIG_BOOT_LOAD < FIXED_CODE_END
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# error "The kernel load address must be after the fixed code section"
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#endif
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#if (CONFIG_BOOT_LOAD & 0x3)
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# error "The kernel load address must be 4 byte aligned"
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#endif
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/* The entire kernel must be able to make a 24bit pcrel call to start of L1 */
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#if ((0xffffffff - L1_CODE_START + 1) + CONFIG_BOOT_LOAD) > 0x1000000
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# error "The kernel load address is too high; keep it below 10meg for safety"
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#endif
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#if ANOMALY_05000448
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# error You are using a part with anomaly 05000448, this issue causes random memory read/write failures - that means random crashes.
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#endif
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/* if 220 exists, can not set External Memory WB and L2 not_cached, either External Memory not_cached and L2 WB */
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#if ANOMALY_05000220 && \
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((defined(CONFIG_BFIN_WB) && defined(CONFIG_BFIN_L2_NOT_CACHED)) || \
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(!defined(CONFIG_BFIN_DCACHE) && defined(CONFIG_BFIN_L2_WB)))
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# error You are exposing Anomaly 220 in this config, either config L2 as Write Through, or make External Memory WB.
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#endif
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