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acrn-kernel/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 22:11:24 +08:00
* 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: 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 22:11:24 +08:00
* Copyright 2007-2009 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 22:11:24 +08:00
* 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 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 12:09:15 +08:00
/* 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: decouple unrelated cache settings to get exact behavior The current cache options don't really represent the hardware features. They end up setting different aspects of the hardware so that the end result is to turn on/off the cache. Unfortunately, when we hit cache problems with the hardware, it's difficult to test different settings to root cause the problem. The current settings also don't cleanly allow for different caching behaviors with different regions of memory. So split the configure options such that they properly reflect the settings that are applied to the hardware. Signed-off-by: Jie Zhang <jie.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-16 17:48:33 +08:00
((defined(CONFIG_BFIN_EXTMEM_WRITEBACK) && !defined(CONFIG_BFIN_L2_DCACHEABLE)) || \
(!defined(CONFIG_BFIN_EXTMEM_DCACHEABLE) && defined(CONFIG_BFIN_L2_WRITEBACK)))
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 12:09:15 +08:00
# error You are exposing Anomaly 220 in this config, either config L2 as Write Through, or make External Memory WB.
#endif
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 10:57:45 +08:00
#if ANOMALY_05000475 && \
(defined(CONFIG_BFIN_EXTMEM_WRITEBACK) || defined(CONFIG_BFIN_L2_WRITEBACK))
# error "Anomaly 475 does not allow you to use Write Back cache with L2 or External Memory"
#endif