59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
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/*
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* Copyright (C) 2018 Marcus Comstedt
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <bsp/util.h>
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#include <bsp/gctl.h>
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#include <errno.h>
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void Fx3UtilDelayUs(uint32_t delay_us)
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{
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/* Each loop is 4 instruction cycles */
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uint32_t cnt = delay_us * (CPU_CLK / 4 / 1000000);
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__asm__ __volatile__("1: subs %0,%0,#1; bcs 1b" : "=r"(cnt) : "0"(cnt) : "cc");
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}
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void exit(int status)
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{
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(void)status;
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Fx3GctlHardReset();
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for(;;)
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;
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}
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void *_sbrk(intptr_t increment)
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{
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extern char _end[];
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extern char __heap_end[];
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static void *current_brk = _end;
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if (increment > __heap_end - (char *)current_brk) {
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errno = ENOMEM;
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return (void *)-1;
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}
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void *ret = current_brk;
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current_brk = increment + (char *)current_brk;
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return ret;
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}
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