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// SPDX-License-Identifier: GPL-2.0-or-later
/***************************************************************************
* Copyright (C) 2014 by Marian Cingel *
* cingel.marian@gmail.com *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "rtos.h"
#include "target/armv7m.h"
/*
* standard exception stack
* ( stack base, higher memory address )
* - xpsr - 0x48
* - pc - 0x44
* - lr - 0x40
* - r12 - 0x3C
* - r3 - 0x38
* - r2 - 0x34
* - r1 - 0x30
* - r0 - 0x2C
* extended stack in svc_pending handler
* - lr - 0x28
* - r11 - 0x24
* - r10 - 0x20
* - r9 - 0x1C
* - r8 - 0x18
* - r7 - 0x14
* - r6 - 0x10
* - r5 - 0x0C
* - r4 - 0x08
* - BASEPRI - 0x04
* - SHPR3 - 0x00 ( contains pend_svc exception priority )
* ( stack head, lower address, stored in 'task->STACK_PTR' )
*/
static const struct stack_register_offset rtos_mqx_arm_v7m_stack_offsets[ARMV7M_NUM_CORE_REGS] = {
{ ARMV7M_R0, 0x2C, 32 }, /* r0 */
{ ARMV7M_R1, 0x30, 32 }, /* r1 */
{ ARMV7M_R2, 0x34, 32 }, /* r2 */
{ ARMV7M_R3, 0x38, 32 }, /* r3 */
{ ARMV7M_R4, 0x08, 32 }, /* r4 */
{ ARMV7M_R5, 0x0C, 32 }, /* r5 */
{ ARMV7M_R6, 0x10, 32 }, /* r6 */
{ ARMV7M_R7, 0x14, 32 }, /* r7 */
{ ARMV7M_R8, 0x18, 32 }, /* r8 */
{ ARMV7M_R9, 0x1C, 32 }, /* r9 */
{ ARMV7M_R10, 0x20, 32 }, /* r10 */
{ ARMV7M_R11, 0x24, 32 }, /* r11 */
{ ARMV7M_R12, 0x3C, 32 }, /* r12 */
{ ARMV7M_R13, -2, 32 }, /* sp */
{ ARMV7M_R14, 0x28, 32 }, /* lr */
{ ARMV7M_PC, 0x44, 32 }, /* pc */
{ ARMV7M_XPSR, 0x48, 32 }, /* xPSR */
};
const struct rtos_register_stacking rtos_mqx_arm_v7m_stacking = {
.stack_registers_size = 0x4C, /* calculate offset base address */
.stack_growth_direction = -1,
.num_output_registers = ARMV7M_NUM_CORE_REGS,
.register_offsets = rtos_mqx_arm_v7m_stack_offsets
};
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