arch/mips/include/asm/mach-ip32/cpu-feature-overrides.h

Source file repositories/reference/linux-study-clean/arch/mips/include/asm/mach-ip32/cpu-feature-overrides.h

File Facts

System
Linux kernel
Corpus path
arch/mips/include/asm/mach-ip32/cpu-feature-overrides.h
Extension
.h
Size
1466 bytes
Lines
52
Domain
Architecture Layer
Bucket
arch/mips
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#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_mips16e2	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 */

Annotation

Implementation Notes