arch/alpha/include/asm/pal.h

Source file repositories/reference/linux-study-clean/arch/alpha/include/asm/pal.h

File Facts

System
Linux kernel
Corpus path
arch/alpha/include/asm/pal.h
Extension
.h
Size
5129 bytes
Lines
188
Domain
Architecture Layer
Bucket
arch/alpha
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 __ALPHA_PAL_H
#define __ALPHA_PAL_H

#include <uapi/asm/pal.h>

#ifndef __ASSEMBLER__

extern void halt(void) __attribute__((noreturn));
#define __halt() __asm__ __volatile__ ("call_pal %0 #halt" : : "i" (PAL_halt))

#define imb() \
__asm__ __volatile__ ("call_pal %0 #imb" : : "i" (PAL_imb) : "memory")

#define draina() \
__asm__ __volatile__ ("call_pal %0 #draina" : : "i" (PAL_draina) : "memory")

#define __CALL_PAL_R0(NAME, TYPE)				\
extern inline TYPE NAME(void)					\
{								\
	register TYPE __r0 __asm__("$0");			\
	__asm__ __volatile__(					\
		"call_pal %1 # " #NAME				\
		:"=r" (__r0)					\
		:"i" (PAL_ ## NAME)				\
		:"$1", "$16", "$22", "$23", "$24", "$25");	\
	return __r0;						\
}

#define __CALL_PAL_W1(NAME, TYPE0)				\
extern inline void NAME(TYPE0 arg0)				\
{								\
	register TYPE0 __r16 __asm__("$16") = arg0;		\
	__asm__ __volatile__(					\
		"call_pal %1 # "#NAME				\
		: "=r"(__r16)					\
		: "i"(PAL_ ## NAME), "0"(__r16)			\
		: "$1", "$22", "$23", "$24", "$25");		\
}

#define __CALL_PAL_W2(NAME, TYPE0, TYPE1)			\
extern inline void NAME(TYPE0 arg0, TYPE1 arg1)			\
{								\
	register TYPE0 __r16 __asm__("$16") = arg0;		\
	register TYPE1 __r17 __asm__("$17") = arg1;		\
	__asm__ __volatile__(					\
		"call_pal %2 # "#NAME				\
		: "=r"(__r16), "=r"(__r17)			\
		: "i"(PAL_ ## NAME), "0"(__r16), "1"(__r17)	\
		: "$1", "$22", "$23", "$24", "$25");		\
}

#define __CALL_PAL_RW1(NAME, RTYPE, TYPE0)			\
extern inline RTYPE NAME(TYPE0 arg0)				\
{								\
	register RTYPE __r0 __asm__("$0");			\
	register TYPE0 __r16 __asm__("$16") = arg0;		\
	__asm__ __volatile__(					\
		"call_pal %2 # "#NAME				\
		: "=r"(__r16), "=r"(__r0)			\
		: "i"(PAL_ ## NAME), "0"(__r16)			\
		: "$1", "$22", "$23", "$24", "$25");		\
	return __r0;						\
}

#define __CALL_PAL_RW2(NAME, RTYPE, TYPE0, TYPE1)		\
extern inline RTYPE NAME(TYPE0 arg0, TYPE1 arg1)		\
{								\
	register RTYPE __r0 __asm__("$0");			\
	register TYPE0 __r16 __asm__("$16") = arg0;		\
	register TYPE1 __r17 __asm__("$17") = arg1;		\
	__asm__ __volatile__(					\
		"call_pal %3 # "#NAME				\
		: "=r"(__r16), "=r"(__r17), "=r"(__r0)		\
		: "i"(PAL_ ## NAME), "0"(__r16), "1"(__r17)	\
		: "$1", "$22", "$23", "$24", "$25");		\
	return __r0;						\
}

__CALL_PAL_W1(cflush, unsigned long);
__CALL_PAL_R0(rdmces, unsigned long);
__CALL_PAL_R0(rdps, unsigned long);
__CALL_PAL_R0(rdusp, unsigned long);
__CALL_PAL_RW1(swpipl, unsigned long, unsigned long);
__CALL_PAL_R0(whami, unsigned long);
__CALL_PAL_W2(wrent, void*, unsigned long);
__CALL_PAL_W1(wripir, unsigned long);
__CALL_PAL_W1(wrkgp, unsigned long);
__CALL_PAL_W1(wrmces, unsigned long);
__CALL_PAL_RW2(wrperfmon, unsigned long, unsigned long, unsigned long);
__CALL_PAL_W1(wrusp, unsigned long);

Annotation

Implementation Notes