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Anomaly 05000491 says that IFLUSH cannot have certain types of memory stalls triggered before it has completed in order to function correctly. One such condition is that it be in L1 instruction. So add a config option to move it there, default it to on, and throw up a warning when it is turned off and this anomaly exists. Since the anomaly should be worked around, we can drop the older method of calling IFLUSH multiple times. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
67 lines
2.2 KiB
C
67 lines
2.2 KiB
C
/*
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* Do some checking to make sure things are OK
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*
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* Copyright 2007-2010 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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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_05000263 && defined(CONFIG_MPU)
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# error the MPU will not function safely while Anomaly 05000263 applies
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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_EXTMEM_WRITEBACK) || defined(CONFIG_BFIN_L2_WRITEBACK))
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# error "Anomaly 05000220 does not allow you to use Write Back cache with L2 or External Memory"
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#endif
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#if ANOMALY_05000491 && !defined(CONFIG_CACHE_FLUSH_L1)
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# error You need IFLUSH in L1 inst while Anomaly 05000491 applies
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#endif
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