[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

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 (file)
index 0000000..e203b5f
--- /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 */