haiku/headers/private/kernel/arch/arm/arch_cpu.h

/*
** Copyright 2003-2004, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
** Distributed under the terms of the MIT License.
*/
#ifndef _KERNEL_ARCH_ARM_CPU_H
#define _KERNEL_ARCH_ARM_CPU_H


#define CPU_MAX_CACHE_LEVEL 8
#define CACHE_LINE_SIZE 64
	// TODO: Could be 32-bits sometimes?


#if __ARM_ARCH__ <= 5
#define isb() __asm__ __volatile__("" : : : "memory")
#define dsb() __asm__ __volatile__("mcr p15, 0, %0, c7, c10, 4" \
    : : "r" (0) : "memory")
#define dmb() __asm__ __volatile__("" : : : "memory")
#elif __ARM_ARCH__ == 6
#define isb() __asm__ __volatile__("mcr p15, 0, %0, c7, c5, 4" \
    : : "r" (0) : "memory")
#define dsb() __asm__ __volatile__("mcr p15, 0, %0, c7, c10, 4" \
    : : "r" (0) : "memory")
#define dmb() __asm__ __volatile__("mcr p15, 0, %0, c7, c10, 5" \
    : : "r" (0) : "memory")
#else /* ARMv7+ */
#define isb() __asm__ __volatile__("isb" : : : "memory")
#define dsb() __asm__ __volatile__("dsb" : : : "memory")
#define dmb() __asm__ __volatile__("dmb" : : : "memory")
#endif

#define set_ac()
#define clear_ac()


#ifndef _ASSEMBLER

#include <arch/arm/arch_thread_types.h>
#include <kernel.h>


/* raw exception frames */
struct iframe {
	uint32 spsr;
	uint32 r0;
	uint32 r1;
	uint32 r2;
	uint32 r3;
	uint32 r4;
	uint32 r5;
	uint32 r6;
	uint32 r7;
	uint32 r8;
	uint32 r9;
	uint32 r10;
	uint32 r11;
	uint32 r12;
	uint32 usr_sp;
	uint32 usr_lr;
	uint32 svc_sp;
	uint32 svc_lr;
	uint32 pc;
} _PACKED;

/**! Values for arch_cpu_info.arch */
enum {
	ARCH_ARM_PRE_ARM7,
	ARCH_ARM_v3,
	ARCH_ARM_v4,
	ARCH_ARM_v4T,
	ARCH_ARM_v5,
	ARCH_ARM_v5T,
	ARCH_ARM_v5TE,
	ARCH_ARM_v5TEJ,
	ARCH_ARM_v6,
	ARCH_ARM_v7
};

typedef struct arch_cpu_info {
	/* For a detailed interpretation of these values,
	   see "The System Control coprocessor",
	   "Main ID register" in your ARM ARM */
	int implementor;
	int part_number;
	int revision;
	int variant;
	int arch;
} arch_cpu_info;

#ifdef __cplusplus
extern "C" {
#endif

extern addr_t arm_get_far(void);
extern int32 arm_get_fsr(void);
extern addr_t arm_get_fp(void);

extern int mmu_read_c1(void);
extern int mmu_write_c1(int val);


static inline void
arch_cpu_pause(void)
{
	// TODO: ARM Priority pause call
}


static inline void
arch_cpu_idle(void)
{
	uint32 Rd = 0;
	asm volatile("mcr p15, 0, %[c7format], c7, c0, 4"
		: : [c7format] "r" (Rd) );
}


#ifdef __cplusplus
};
#endif

#endif	// !_ASSEMBLER

#endif	/* _KERNEL_ARCH_ARM_CPU_H */