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integrate zero-riscy
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@@ -57,77 +57,13 @@ unsigned int alt_busy_sleep (unsigned int us)
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* skipped to speed up simulation.
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*/
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#ifndef ALT_SIM_OPTIMIZE
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int i;
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int big_loops;
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alt_u32 cycles_per_loop;
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if (!strcmp(NIOS2_CPU_IMPLEMENTATION,"tiny"))
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{
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cycles_per_loop = 9;
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}
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else
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{
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cycles_per_loop = 3;
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}
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unsigned long i, loops;
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big_loops = us / (INT_MAX/
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(ALT_CPU_FREQ/(cycles_per_loop * 1000000)));
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// 1 loop >= 7 cyc
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loops = ((ALT_CPU_FREQ/1000000)*us)/7;
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if (big_loops)
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{
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for(i=0;i<big_loops;i++)
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{
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/*
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* Do NOT Try to single step the asm statement below
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* (single step will never return)
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* Step out of this function or set a breakpoint after the asm statements
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*/
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__asm__ volatile (
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"\n0:"
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"\n\taddi %0,%0, -1"
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"\n\tbne %0,zero,0b"
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"\n1:"
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"\n\t.pushsection .debug_alt_sim_info"
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"\n\t.int 4, 0, 0b, 1b"
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"\n\t.popsection"
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:: "r" (INT_MAX));
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us -= (INT_MAX/(ALT_CPU_FREQ/
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(cycles_per_loop * 1000000)));
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}
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/*
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* Do NOT Try to single step the asm statement below
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* (single step will never return)
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* Step out of this function or set a breakpoint after the asm statements
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*/
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__asm__ volatile (
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"\n0:"
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"\n\taddi %0,%0, -1"
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"\n\tbne %0,zero,0b"
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"\n1:"
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"\n\t.pushsection .debug_alt_sim_info"
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"\n\t.int 4, 0, 0b, 1b"
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"\n\t.popsection"
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:: "r" (us*(ALT_CPU_FREQ/(cycles_per_loop * 1000000))));
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}
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else
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{
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/*
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* Do NOT Try to single step the asm statement below
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* (single step will never return)
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* Step out of this function or set a breakpoint after the asm statements
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*/
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__asm__ volatile (
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"\n0:"
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"\n\taddi %0,%0, -1"
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"\n\tbgt %0,zero,0b"
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"\n1:"
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"\n\t.pushsection .debug_alt_sim_info"
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"\n\t.int 4, 0, 0b, 1b"
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"\n\t.popsection"
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:: "r" (us*(ALT_CPU_FREQ/(cycles_per_loop * 1000000))));
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}
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for (i=7; i<loops; i++)
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asm volatile ("nop");
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#endif /* #ifndef ALT_SIM_OPTIMIZE */
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return 0;
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}
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@@ -0,0 +1,80 @@
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/******************************************************************************
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* *
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* License Agreement *
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* *
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* Copyright (c) 2015 Altera Corporation, San Jose, California, USA. *
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* All rights reserved. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the "Software"), *
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* to deal in the Software without restriction, including without limitation *
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* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
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* and/or sell copies of the Software, and to permit persons to whom the *
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* Software is furnished to do so, 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 *
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* all 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, *
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *
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* DEALINGS IN THE SOFTWARE. *
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* *
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* This agreement shall be governed in all respects by the laws of the State *
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* of California and by the laws of the United States of America. *
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* *
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* Altera does not recommend, suggest or require that this reference design *
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* file be used in conjunction or combination with any other product. *
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******************************************************************************/
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#ifdef ALT_SEMIHOSTING
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#include "sys/alt_stdio.h"
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#include "unistd.h"
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#ifndef ALT_PUTBUF_SIZE
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#define ALT_PUTBUF_SIZE 64
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#endif
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// Buffer for the printed chars
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static char buf[ALT_PUTBUF_SIZE] ={0};
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// index into the buffer
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static unsigned int fill_index;
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/*
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* ALT putcharbuf funtion
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* Used only for semihosting.
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* Not thread safe!
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* This fucntion buffers up chars to be printed until either alt_putbufflush()
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* is called or the buffer is full.
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* It is called by alt_printf when semihosting is turned on
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* Its purpose is to minimize the number of Break 1 issuesd by the semihosting
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* libraries.
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*/
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int
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alt_putcharbuf(int c)
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{
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buf[fill_index++] = (char)(c & 0xff);
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if(fill_index >= ALT_PUTBUF_SIZE)
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alt_putbufflush();
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return c;
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}
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/*
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* ALT putbufflush
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* used only for smehosting
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* Not thread safe!
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* Dumps all the chars in the buffer to STDOUT
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*/
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int
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alt_putbufflush()
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{
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int results;
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results = write(STDOUT_FILENO,buf,fill_index);
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fill_index = 0;
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return results;
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}
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#endif
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