[Gnewsense-dev] [loongson-PATCH-v1 10/27] add loongson-specific cpu-feature-overrides.h

[wuzhangjin]

From: Wu Zhangjin <address@hidden>

This file will obviously reduce the size of kernel image file, reduce
tons of branches and enhance the performance.

$ wc -c vmlinux         // before
8054849 vmlinux
$ wc -c vmlinux         // after
7626936 vmlinux
$ echo $(((8054849-7626936)/1024))      // kb
417
$ echo "(8054849-7626936)/8054849" | bc -l
.05312489408553779220

Signed-off-by: Wu Zhangjin <address@hidden>
---
 .../asm/mach-loongson/cpu-feature-overrides.h      |   58 ++++++++++++++++++++
 1 files changed, 58 insertions(+), 0 deletions(-)
 create mode 100644 arch/mips/include/asm/mach-loongson/cpu-feature-overrides.h

diff --git a/arch/mips/include/asm/mach-loongson/cpu-feature-overrides.h 
b/arch/mips/include/asm/mach-loongson/cpu-feature-overrides.h
new file mode 100644
index 0000000..daa2ee9
--- /dev/null
+++ b/arch/mips/include/asm/mach-loongson/cpu-feature-overrides.h
@@ -0,0 +1,58 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2009 Wu Zhangjin <address@hidden>
+ * Copyright (C) 2009 Philippe Vachon <address@hidden>
+ * Copyright (C) 2009 Zhang Le <address@hidden>
+ *
+ * reference: /proc/cpuinfo,
+ *     arch/mips/kernel/cpu-probe.c(cpu_probe_legacy),
+ *     arch/mips/kernel/proc.c(show_cpuinfo),
+ *      loongson2f user manual.
+ */
+
+#ifndef __ASM_LOONGSON_CPU_FEATURE_OVERRIDES_H
+#define __ASM_LOONGSON_CPU_FEATURE_OVERRIDES_H
+
+#define cpu_dcache_line_size() 32
+#define cpu_icache_line_size() 32
+#define cpu_scache_line_size() 32
+
+#define cpu_has_32fpr          1
+#define cpu_has_3k_cache       0
+#define cpu_has_4k_cache       1
+#define cpu_has_4kex           1
+#define cpu_has_64bits         1
+#define cpu_has_cache_cdex_p   0
+#define cpu_has_cache_cdex_s   0
+#define cpu_has_counter                1
+#define cpu_has_dc_aliases     1
+#define cpu_has_divec          0
+#define cpu_has_dsp            0
+#define cpu_has_ejtag          0
+#define cpu_has_fpu            1
+#define cpu_has_ic_fills_f_dc  0
+#define cpu_has_inclusive_pcaches      1
+#define cpu_has_llsc           1
+#define cpu_has_mcheck         0
+#define cpu_has_mdmx           0
+#define cpu_has_mips16         0
+#define cpu_has_mips32r1       0
+#define cpu_has_mips32r2       0
+#define cpu_has_mips3d         0
+#define cpu_has_mips64r1       0
+#define cpu_has_mips64r2       0
+#define cpu_has_mipsmt         0
+#define cpu_has_prefetch       0
+#define cpu_has_smartmips      0
+#define cpu_has_tlb            1
+#define cpu_has_tx39_cache     0
+#define cpu_has_userlocal      0
+#define cpu_has_vce            0
+#define cpu_has_vtag_icache    0
+#define cpu_has_watch          1
+#define cpu_icache_snoops_remote_store 1
+
+#endif                         /* __ASM_LOONGSON_CPU_FEATURE_OVERRIDES_H */
-- 
1.6.2.1