add a workaround for fixing the bad performance of the Ubiquiti RouterStation/LS-SR71 boards, until they fix their bootloader.
SVN-Revision: 14556master
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/*
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* Atheros AR71xx specific kernel entry setup |
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* |
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* Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org> |
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* |
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* This program is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 as published |
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* by the Free Software Foundation. |
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* |
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*/ |
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#ifndef __ASM_MACH_AR71XX_KERNEL_ENTRY_H |
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#define __ASM_MACH_AR71XX_KERNEL_ENTRY_H |
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/*
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* Some bootloaders set the 'Kseg0 coherency algorithm' to |
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* 'Cacheable, noncoherent, write-through, no write allocate' |
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* and this cause performance issues. Let's go and change it to |
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* 'Cacheable, noncoherent, write-back, write allocate' |
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*/ |
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.macro kernel_entry_setup |
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mfc0 t0, CP0_CONFIG |
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li t1, ~CONF_CM_CMASK |
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and t0, t1 |
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ori t0, CONF_CM_CACHABLE_NONCOHERENT |
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mtc0 t0, CP0_CONFIG |
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nop |
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.endm |
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.macro smp_slave_setup |
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.endm |
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#endif /* __ASM_MACH_AR71XX_KERNEL_ENTRY_H */ |
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