arch/mips/include/asm/ginvt.h

Source file repositories/reference/linux-study-clean/arch/mips/include/asm/ginvt.h

File Facts

System
Linux kernel
Corpus path
arch/mips/include/asm/ginvt.h
Extension
.h
Size
1159 bytes
Lines
60
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 __MIPS_ASM_GINVT_H__
#define __MIPS_ASM_GINVT_H__

#include <asm/mipsregs.h>

enum ginvt_type {
	GINVT_FULL,
	GINVT_VA,
	GINVT_MMID,
};

#ifdef TOOLCHAIN_SUPPORTS_GINV
# define _ASM_SET_GINV	".set	ginv\n"
# define _ASM_UNSET_GINV
#else
# define _ASM_SET_GINV							\
	_ASM_MACRO_1R1I(ginvt, rs, type,				\
			_ASM_INSN_IF_MIPS(0x7c0000bd | (__rs << 21) | (\\type << 8))	\
			_ASM_INSN32_IF_MM(0x0000717c | (__rs << 16) | (\\type << 9)))
# define _ASM_UNSET_GINV ".purgem ginvt\n"
#endif

static __always_inline void ginvt(unsigned long addr, enum ginvt_type type)
{
	asm volatile(
		".set	push\n"
		_ASM_SET_GINV
		"	ginvt	%0, %1\n"
		_ASM_UNSET_GINV
		".set	pop"
		: /* no outputs */
		: "r"(addr), "i"(type)
		: "memory");
}

static inline void ginvt_full(void)
{
	ginvt(0, GINVT_FULL);
}

static inline void ginvt_va(unsigned long addr)
{
	addr &= PAGE_MASK << 1;
	ginvt(addr, GINVT_VA);
}

static inline void ginvt_mmid(void)
{
	ginvt(0, GINVT_MMID);
}

static inline void ginvt_va_mmid(unsigned long addr)
{
	addr &= PAGE_MASK << 1;
	ginvt(addr, GINVT_VA | GINVT_MMID);
}

#endif /* __MIPS_ASM_GINVT_H__ */

Annotation

Implementation Notes