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-rw-r--r--arch/mips/include/asm/mach-ath79/kernel-entry-init.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-ath79/kernel-entry-init.h b/arch/mips/include/asm/mach-ath79/kernel-entry-init.h
new file mode 100644
index 000000000..88db67bf4
--- /dev/null
+++ b/arch/mips/include/asm/mach-ath79/kernel-entry-init.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Atheros AR71XX/AR724X/AR913X specific kernel entry setup
+ *
+ * Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
+ */
+#ifndef __ASM_MACH_ATH79_KERNEL_ENTRY_H
+#define __ASM_MACH_ATH79_KERNEL_ENTRY_H
+
+ /*
+ * Some bootloaders set the 'Kseg0 coherency algorithm' to
+ * 'Cacheable, noncoherent, write-through, no write allocate'
+ * and this cause performance issues. Let's go and change it to
+ * 'Cacheable, noncoherent, write-back, write allocate'
+ */
+ .macro kernel_entry_setup
+ mfc0 t0, CP0_CONFIG
+ li t1, ~CONF_CM_CMASK
+ and t0, t1
+ ori t0, CONF_CM_CACHABLE_NONCOHERENT
+ mtc0 t0, CP0_CONFIG
+ nop
+ .endm
+
+ .macro smp_slave_setup
+ .endm
+
+#endif /* __ASM_MACH_ATH79_KERNEL_ENTRY_H */