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59 lines
1.1 KiB
C
59 lines
1.1 KiB
C
/*
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* SPDX-FileCopyrightText: 2014 Freie Universität Berlin
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* SPDX-License-Identifier: LGPL-2.1-only
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*/
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#pragma once
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#include <stdint.h>
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#include "VIC.h"
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#include "arm7_common.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define NEW_TASK_CPSR 0x1F
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#define WORDSIZE 32
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uint32_t get_system_speed(void);
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void cpu_clock_scale(uint32_t source, uint32_t target, uint32_t *prescale);
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void arm_reset(void);
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/**
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* @brief Returns the current content of the link register (lr)
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*/
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static inline uintptr_t cpu_get_caller_pc(void)
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{
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register uintptr_t lr_ptr;
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__asm__ __volatile__ ("mov %0, lr" : "=r" (lr_ptr));
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return lr_ptr;
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}
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/**
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* @brief Interrupt stack canary value
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*
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* @note 0xeafffffe is the ARM machine code equivalent of asm("b #0") or
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* 'while (1);', i.e. an infinite loop.
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* @internal
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*/
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#define STACK_CANARY_WORD (0xEAFFFFFEu)
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/**
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* @brief Select fastest bitarithm_lsb implementation
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* @{
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*/
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#ifdef __ARM_FEATURE_CLZ
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#define BITARITHM_LSB_BUILTIN
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#define BITARITHM_HAS_CLZ
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#else
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#define BITARITHM_LSB_LOOKUP
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#endif
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/** @} */
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#ifdef __cplusplus
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}
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#endif
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