1d2912cb1SThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-only */ 2d4a67d9dSGabor Juhos /* 3d4a67d9dSGabor Juhos * Atheros AR71XX/AR724X/AR913X specific kernel entry setup 4d4a67d9dSGabor Juhos * 5d4a67d9dSGabor Juhos * Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org> 6d4a67d9dSGabor Juhos */ 7d4a67d9dSGabor Juhos #ifndef __ASM_MACH_ATH79_KERNEL_ENTRY_H 8d4a67d9dSGabor Juhos #define __ASM_MACH_ATH79_KERNEL_ENTRY_H 9d4a67d9dSGabor Juhos 10d4a67d9dSGabor Juhos /* 11d4a67d9dSGabor Juhos * Some bootloaders set the 'Kseg0 coherency algorithm' to 12d4a67d9dSGabor Juhos * 'Cacheable, noncoherent, write-through, no write allocate' 13d4a67d9dSGabor Juhos * and this cause performance issues. Let's go and change it to 14d4a67d9dSGabor Juhos * 'Cacheable, noncoherent, write-back, write allocate' 15d4a67d9dSGabor Juhos */ 16d4a67d9dSGabor Juhos .macro kernel_entry_setup 17d4a67d9dSGabor Juhos mfc0 t0, CP0_CONFIG 18d4a67d9dSGabor Juhos li t1, ~CONF_CM_CMASK 19d4a67d9dSGabor Juhos and t0, t1 20d4a67d9dSGabor Juhos ori t0, CONF_CM_CACHABLE_NONCOHERENT 21d4a67d9dSGabor Juhos mtc0 t0, CP0_CONFIG 22d4a67d9dSGabor Juhos nop 23d4a67d9dSGabor Juhos .endm 24d4a67d9dSGabor Juhos 25d4a67d9dSGabor Juhos .macro smp_slave_setup 26d4a67d9dSGabor Juhos .endm 27d4a67d9dSGabor Juhos 28d4a67d9dSGabor Juhos #endif /* __ASM_MACH_ATH79_KERNEL_ENTRY_H */ 29