diff options
| author | Gabor Juhos <juhosg@openwrt.org> | 2008-05-05 18:53:27 +0000 |
|---|---|---|
| committer | Gabor Juhos <juhosg@openwrt.org> | 2008-05-05 18:53:27 +0000 |
| commit | 2a97980ee31757ee070fc1915206c1673075d9c3 (patch) | |
| tree | e13064f2658baf25fc1caedfcfbd1421865cbf05 | |
| parent | 5eb551c3a5b0989338a56db4833a67564a617815 (diff) | |
| download | mtk-20170518-2a97980ee31757ee070fc1915206c1673075d9c3.zip mtk-20170518-2a97980ee31757ee070fc1915206c1673075d9c3.tar.gz mtk-20170518-2a97980ee31757ee070fc1915206c1673075d9c3.tar.bz2 | |
override CPU features to save ~125KB of kernel memory
SVN-Revision: 11050
| -rw-r--r-- | target/linux/atheros/files/include/asm-mips/mach-atheros/cpu-feature-overrides.h | 84 |
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 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 */ |