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linux/arch/blackfin/mach-common/arch_checks.c

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Blackfin arch: Fix CCLK and SCLK checks Fix CCLK and SCLK checks, combine all arch checks into one file for maintance. Checkins that remove more lines than they add are always good. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-08-03 18:07:17 +08:00
/*
Blackfin: mass clean up of copyright/licensing info Bill Gatliff & David Brownell pointed out we were missing some copyrights, and licensing terms in some of the files in ./arch/blackfin, so this fixes things, and cleans them up. It also removes: - verbose GPL text(refer to the top level ./COPYING file) - file names (you are looking at the file) - bug url (it's in the ./MAINTAINERS file) - "or later" on GPL-2, when we did not have that right It also allows some Blackfin-specific assembly files to be under a BSD like license (for people to use them outside of Linux). Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-24 14:11:24 +00:00
* Do some checking to make sure things are OK
Blackfin arch: Fix CCLK and SCLK checks Fix CCLK and SCLK checks, combine all arch checks into one file for maintance. Checkins that remove more lines than they add are always good. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-08-03 18:07:17 +08:00
*
Blackfin: move MPU anomaly check to common location Keep all anomaly/arch checks in one place to keep logic simple. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-05-27 22:33:46 +00:00
* Copyright 2007-2010 Analog Devices Inc.
Blackfin arch: Fix CCLK and SCLK checks Fix CCLK and SCLK checks, combine all arch checks into one file for maintance. Checkins that remove more lines than they add are always good. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-08-03 18:07:17 +08:00
*
Blackfin: mass clean up of copyright/licensing info Bill Gatliff & David Brownell pointed out we were missing some copyrights, and licensing terms in some of the files in ./arch/blackfin, so this fixes things, and cleans them up. It also removes: - verbose GPL text(refer to the top level ./COPYING file) - file names (you are looking at the file) - bug url (it's in the ./MAINTAINERS file) - "or later" on GPL-2, when we did not have that right It also allows some Blackfin-specific assembly files to be under a BSD like license (for people to use them outside of Linux). Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-24 14:11:24 +00:00
* Licensed under the GPL-2 or later.
Blackfin arch: Fix CCLK and SCLK checks Fix CCLK and SCLK checks, combine all arch checks into one file for maintance. Checkins that remove more lines than they add are always good. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-08-03 18:07:17 +08:00
*/
Blackfin arch: make sure the BSS and kernel load address are 4 byte aligned Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-08-06 17:10:57 +08:00
#include <asm/fixed_code.h>
Blackfin arch: move include/asm-blackfin header files to arch/blackfin Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-08-27 10:51:02 +08:00
#include <mach/anomaly.h>
#include <asm/clocks.h>
Blackfin arch: Fix CCLK and SCLK checks Fix CCLK and SCLK checks, combine all arch checks into one file for maintance. Checkins that remove more lines than they add are always good. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-08-03 18:07:17 +08:00
#ifdef CONFIG_BFIN_KERNEL_CLOCK
# if (CONFIG_VCO_HZ > CONFIG_MAX_VCO_HZ)
# error "VCO selected is more than maximum value. Please change the VCO multipler"
# endif
# if (CONFIG_SCLK_HZ > CONFIG_MAX_SCLK_HZ)
# error "Sclk value selected is more than maximum. Please select a proper value for SCLK multiplier"
# endif
# if (CONFIG_SCLK_HZ < CONFIG_MIN_SCLK_HZ)
# error "Sclk value selected is less than minimum. Please select a proper value for SCLK multiplier"
# endif
# if (ANOMALY_05000273) && (CONFIG_SCLK_HZ * 2 > CONFIG_CCLK_HZ)
# error "ANOMALY 05000273, please make sure CCLK is at least 2x SCLK"
# endif
# if (CONFIG_SCLK_HZ > CONFIG_CCLK_HZ) && (CONFIG_SCLK_HZ != CONFIG_CLKIN_HZ) && (CONFIG_CCLK_HZ != CONFIG_CLKIN_HZ)
# error "Please select sclk less than cclk"
# endif
#endif /* CONFIG_BFIN_KERNEL_CLOCK */
Blackfin arch: make sure the BSS and kernel load address are 4 byte aligned Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-08-06 17:10:57 +08:00
#if CONFIG_BOOT_LOAD < FIXED_CODE_END
# error "The kernel load address must be after the fixed code section"
#endif
#if (CONFIG_BOOT_LOAD & 0x3)
# error "The kernel load address must be 4 byte aligned"
#endif
Blackfin arch: make sure people do not set the kernel load address too high Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-03-05 17:33:36 +08:00
/* The entire kernel must be able to make a 24bit pcrel call to start of L1 */
#if ((0xffffffff - L1_CODE_START + 1) + CONFIG_BOOT_LOAD) > 0x1000000
# error "The kernel load address is too high; keep it below 10meg for safety"
#endif
Blackfin arch: Random read/write errors are a bad thing Random read/write errors are a bad thing - so don't let anyone (including the test bench) run on something we know is bad. Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-03-05 18:18:49 +08:00
Blackfin: move MPU anomaly check to common location Keep all anomaly/arch checks in one place to keep logic simple. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-05-27 22:33:46 +00:00
#if ANOMALY_05000263 && defined(CONFIG_MPU)
# error the MPU will not function safely while Anomaly 05000263 applies
#endif
Blackfin arch: remove duplicated ANOMALY_05000448 ifdef check Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-03-06 00:24:01 +08:00
#if ANOMALY_05000448
# error You are using a part with anomaly 05000448, this issue causes random memory read/write failures - that means random crashes.
Blackfin arch: Random read/write errors are a bad thing Random read/write errors are a bad thing - so don't let anyone (including the test bench) run on something we know is bad. Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-03-05 18:18:49 +08:00
#endif
Blackfin: work around anomaly 05000220 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>
2009-05-07 04:09:15 +00:00
/* if 220 exists, can not set External Memory WB and L2 not_cached, either External Memory not_cached and L2 WB */
#if ANOMALY_05000220 && \
Blackfin: check for anomaly 05000475 Parts that have on-chip L2 SRAM cannot safely utilize writeback caching mode, so reject any attempts to use it. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-11-03 02:57:45 +00:00
(defined(CONFIG_BFIN_EXTMEM_WRITEBACK) || defined(CONFIG_BFIN_L2_WRITEBACK))
Blackfin: merge anomalies 475 and 220 to follow official lists Design found that these anomalies had the same root issue, so they've merged 475 into 220. We need to do the same to update to the latest anomaly sheets. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-05-27 22:40:26 +00:00
# error "Anomaly 05000220 does not allow you to use Write Back cache with L2 or External Memory"
Blackfin: check for anomaly 05000475 Parts that have on-chip L2 SRAM cannot safely utilize writeback caching mode, so reject any attempts to use it. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-11-03 02:57:45 +00:00
#endif
Blackfin: allow cache funcs to be in L1 for IFLUSH Anomaly 05000491 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>
2010-05-27 22:46:46 +00:00
Blackfin: split optimization settings more We need to place icache flush funcs into L1 inst sram to work around a hardware anomaly. But this currently breaks SMP support as the L1 inst sram is per-core and cannot be called directly. So in preparation for making that work, split the two options. Further, split out the SMP depend so that we can allow some for SMP. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-02-02 22:31:42 -05:00
#if ANOMALY_05000491 && !defined(CONFIG_ICACHE_FLUSH_L1)
Blackfin: allow cache funcs to be in L1 for IFLUSH Anomaly 05000491 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>
2010-05-27 22:46:46 +00:00
# error You need IFLUSH in L1 inst while Anomaly 05000491 applies
#endif
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