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39 lines
820 B
39 lines
820 B
//
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// Created by MightyPork on 2017/11/26.
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//
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#ifndef GEX_CORTEX_UTILS_H
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#define GEX_CORTEX_UTILS_H
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#include "platform.h"
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static inline bool inIRQ(void)
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{
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return __get_IPSR() != 0;
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}
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register char *__SP asm("sp");
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static inline bool isDynAlloc(const void *obj)
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{
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// this is the 0x20000000-something address that should correspond to heap bottom
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extern char heapstart __asm("end");
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return ((uint32_t)obj >= (uint32_t)&heapstart)
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&& ((uint32_t)obj < (uint32_t)__SP);
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}
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/** Tight asm loop */
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#define __asm_loop(cycles) \
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do { \
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register uint32_t _count asm ("r4") = cycles; \
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asm volatile( \
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".syntax unified\n" \
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".thumb\n" \
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"0:" \
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"subs %0, #1\n" \
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"bne 0b\n" \
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: "+r" (_count)); \
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} while(0)
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#endif //GEX_CORTEX_UTILS_H
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