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authorGabor Juhos <juhosg@openwrt.org>2008-05-05 18:53:27 +0000
committerGabor Juhos <juhosg@openwrt.org>2008-05-05 18:53:27 +0000
commit484e99cd78bbaefc42d70dd696a560ec4e8d0135 (patch)
tree1d3258851671d59222a820e397e278c2b76f7c0d
parent2d697dad7b74b9e1463670ba99c9e6d761044f0a (diff)
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[atheros] override CPU features to save ~125KB of kernel memory
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11050 3c298f89-4303-0410-b956-a3cf2f4a3e73
-rw-r--r--target/linux/atheros/files/include/asm-mips/mach-atheros/cpu-feature-overrides.h84
1 files changed, 84 insertions, 0 deletions
diff --git a/target/linux/atheros/files/include/asm-mips/mach-atheros/cpu-feature-overrides.h b/target/linux/atheros/files/include/asm-mips/mach-atheros/cpu-feature-overrides.h
new file mode 100644
index 0000000000..e203b5fb88
--- /dev/null
+++ b/target/linux/atheros/files/include/asm-mips/mach-atheros/cpu-feature-overrides.h
@@ -0,0 +1,84 @@
+/*
+ * Atheros SoC specific CPU feature overrides
+ *
+ * Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * This file was derived from: include/asm-mips/cpu-features.h
+ * Copyright (C) 2003, 2004 Ralf Baechle
+ * Copyright (C) 2004 Maciej W. Rozycki
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ */
+#ifndef __ASM_MACH_ATHEROS_CPU_FEATURE_OVERRIDES_H
+#define __ASM_MACH_ATHEROS_CPU_FEATURE_OVERRIDES_H
+
+/*
+ * The ATHEROS SoCs have MIPS 4Kc/4KEc core.
+ */
+#define cpu_has_tlb 1
+#define cpu_has_4kex 1
+#define cpu_has_3k_cache 0
+#define cpu_has_4k_cache 1
+#define cpu_has_tx39_cache 0
+#define cpu_has_sb1_cache 0
+#define cpu_has_fpu 0
+#define cpu_has_32fpr 0
+#define cpu_has_counter 1
+/* #define cpu_has_watch ? */
+/* #define cpu_has_divec ? */
+/* #define cpu_has_vce ? */
+/* #define cpu_has_cache_cdex_p ? */
+/* #define cpu_has_cache_cdex_s ? */
+/* #define cpu_has_prefetch ? */
+/* #define cpu_has_mcheck ? */
+#define cpu_has_ejtag 1
+
+#if !defined(CONFIG_ATHEROS_AR5312)
+# define cpu_has_llsc 1
+#else
+/*
+ * The MIPS 4Kc V0.9 core in the AR5312/AR2312 have problems with the
+ * ll/sc instructions.
+ */
+# define cpu_has_llsc 0
+#endif
+
+#define cpu_has_mips16 0
+#define cpu_has_mdmx 0
+#define cpu_has_mips3d 0
+#define cpu_has_smartmips 0
+
+/* #define cpu_has_vtag_icache ? */
+/* #define cpu_has_dc_aliases ? */
+/* #define cpu_has_ic_fills_f_dc ? */
+/* #define cpu_has_pindexed_dcache ? */
+
+/* #define cpu_icache_snoops_remote_store ? */
+
+#define cpu_has_mips32r1 1
+
+#if !defined(CONFIG_ATHEROS_5312)
+# define cpu_has_mips32r2 1
+#endif
+
+#define cpu_has_mips64r1 0
+#define cpu_has_mips64r2 0
+
+#define cpu_has_dsp 0
+#define cpu_has_mipsmt 0
+
+/* #define cpu_has_nofpuex ? */
+#define cpu_has_64bits 0
+#define cpu_has_64bit_zero_reg 0
+#define cpu_has_64bit_gp_regs 0
+#define cpu_has_64bit_addresses 0
+
+/* #define cpu_has_inclusive_pcaches ? */
+
+/* #define cpu_dcache_line_size() ? */
+/* #define cpu_icache_line_size() ? */
+
+#endif /* __ASM_MACH_ATHEROS_CPU_FEATURE_OVERRIDES_H */