/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSScoreCPUARM
*
* @brief This header file defines implementation interfaces pertaining to the
* port of the executive to the ARM architecture.
*/
/*
* Copyright (C) 2013, 2016 embedded brains GmbH & Co. KG
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _RTEMS_SCORE_CPUIMPL_H
#define _RTEMS_SCORE_CPUIMPL_H
#include <rtems/score/cpu.h>
/**
* @defgroup RTEMSScoreCPUARM ARM
*
* @ingroup RTEMSScoreCPU
*
* @brief ARM Architecture Support
*
* @{
*/
#define CPU_PER_CPU_CONTROL_SIZE 0
#ifdef ARM_MULTILIB_ARCH_V4
#if defined(ARM_MULTILIB_VFP_D32)
#define CPU_INTERRUPT_FRAME_SIZE 240
#elif defined(ARM_MULTILIB_VFP)
#define CPU_INTERRUPT_FRAME_SIZE 112
#else
#define CPU_INTERRUPT_FRAME_SIZE 40
#endif
#endif /* ARM_MULTILIB_ARCH_V4 */
#define CPU_THREAD_LOCAL_STORAGE_VARIANT 11
#ifndef ASM
#ifdef __cplusplus
extern "C" {
#endif
#ifdef ARM_MULTILIB_ARCH_V4
typedef struct {
#ifdef ARM_MULTILIB_VFP
uint32_t fpscr;
#ifdef ARM_MULTILIB_VFP_D32
double d16;
double d17;
double d18;
double d19;
double d20;
double d21;
double d22;
double d23;
double d24;
double d25;
double d26;
double d27;
double d28;
double d29;
double d30;
double d31;
#endif /* ARM_MULTILIB_VFP_D32 */
double d0;
double d1;
double d2;
double d3;
double d4;
double d5;
double d6;
double d7;
#endif /* ARM_MULTILIB_VFP */
#ifdef ARM_MULTILIB_HAS_STORE_RETURN_STATE
uint32_t r0;
uint32_t r1;
uint32_t r2;
uint32_t r3;
uint32_t r7;
uint32_t r9;
uint32_t r12;
uint32_t lr;
uint32_t return_pc;
uint32_t return_cpsr;
#else /* ARM_MULTILIB_HAS_STORE_RETURN_STATE */
uint32_t r9;
uint32_t lr;
uint32_t r0;
uint32_t r1;
uint32_t r2;
uint32_t r3;
uint32_t return_pc;
uint32_t return_cpsr;
uint32_t r7;
uint32_t r12;
#endif /* ARM_MULTILIB_HAS_STORE_RETURN_STATE */
} CPU_Interrupt_frame;
#ifdef RTEMS_SMP
static inline struct Per_CPU_Control *_ARM_Get_current_per_CPU_control( void )
{
struct Per_CPU_Control *cpu_self;
/* Use PL1 only Thread ID Register (TPIDRPRW) */
__asm__ volatile (
"mrc p15, 0, %0, c13, c0, 4"
: "=r" ( cpu_self )
);
return cpu_self;
}
#define _CPU_Get_current_per_CPU_control() _ARM_Get_current_per_CPU_control()
#endif /* RTEMS_SMP */
#endif /* ARM_MULTILIB_ARCH_V4 */
RTEMS_NO_RETURN void _CPU_Fatal_halt( uint32_t source, CPU_Uint32ptr error );
void _CPU_Context_volatile_clobber( uintptr_t pattern );
void _CPU_Context_validate( uintptr_t pattern );
static inline void _CPU_Instruction_illegal( void )
{
__asm__ volatile ( "udf" );
}
static inline void _CPU_Instruction_no_operation( void )
{
__asm__ volatile ( "nop" );
}
static inline void _CPU_Use_thread_local_storage(
const Context_Control *context
)
{
#ifdef ARM_MULTILIB_HAS_THREAD_ID_REGISTER
__asm__ volatile (
"mcr p15, 0, %0, c13, c0, 3" : : "r" ( context->thread_id ) : "memory"
);
#else
(void) context;
#endif
}
static inline void *_CPU_Get_TLS_thread_pointer(
const Context_Control *context
)
{
return (void *) context->thread_id;
}
#ifdef __cplusplus
}
#endif
#endif /* ASM */
/** @} */
#endif /* _RTEMS_SCORE_CPUIMPL_H */
