cpu-feature-overrides.h
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/*
* 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) 2005 Ilya A. Volynets-Evenbakh
* Copyright (C) 2005, 07 Ralf Baechle (ralf@linux-mips.org)
*/
#ifndef __ASM_MACH_IP32_CPU_FEATURE_OVERRIDES_H
#define __ASM_MACH_IP32_CPU_FEATURE_OVERRIDES_H
/*
* R5000 has an interesting "restriction": ll(d)/sc(d)
* instructions to XKPHYS region simply do uncached bus
* requests. This breaks all the atomic bitops functions.
* so, for 64bit IP32 kernel we just don't use ll/sc.
* This does not affect luserland.
*/
#if (defined(CONFIG_CPU_R5000) || defined(CONFIG_CPU_NEVADA)) && defined(CONFIG_64BIT)
#define cpu_has_llsc 0
#else
#define cpu_has_llsc 1
#endif
/* Settings which are common for all ip32 CPUs */
#define cpu_has_tlb 1
#define cpu_has_4kex 1
#define cpu_has_32fpr 1
#define cpu_has_counter 1
#define cpu_has_mips16 0
#define cpu_has_vce 0
#define cpu_has_cache_cdex_s 0
#define cpu_has_mcheck 0
#define cpu_has_ejtag 0
#define cpu_has_vtag_icache 0
#define cpu_has_ic_fills_f_dc 0
#define cpu_has_dsp 0
#define cpu_has_dsp2 0
#define cpu_has_4k_cache 1
#define cpu_has_mipsmt 0
#define cpu_has_userlocal 0
#define cpu_has_mips32r1 0
#define cpu_has_mips32r2 0
#define cpu_has_mips64r1 0
#define cpu_has_mips64r2 0
#endif /* __ASM_MACH_IP32_CPU_FEATURE_OVERRIDES_H */