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/******************************** -*- C -*- ****************************
*
* Run-time assembler for the arm
*
***********************************************************************/
/***********************************************************************
*
* Copyright 2011 Free Software Foundation
*
* This file is part of GNU lightning.
*
* GNU lightning is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU lightning is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with GNU lightning; see the file COPYING.LESSER; if not, write to the
* Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
* Authors:
* Paulo Cesar Pereira de Andrade
***********************************************************************/
#ifndef __lightning_funcs_h
#define __lightning_funcs_h
#if defined(__linux__)
# include <stdio.h>
# include <string.h>
#endif
#include <stdlib.h>
#include <unistd.h>
#include <sys/mman.h>
extern void __clear_cache(void*, void*);
static void
jit_flush_code(void *start, void *end)
{
mprotect(start, (char *)end - (char *)start,
PROT_READ | PROT_WRITE | PROT_EXEC);
__clear_cache(start, end);
}
#define jit_get_cpu jit_get_cpu
__jit_constructor static void
jit_get_cpu(void)
{
#if defined(__linux__)
FILE *fp;
char *ptr;
char buf[128];
static int initialized;
if (initialized)
return;
initialized = 1;
if ((fp = fopen("/proc/cpuinfo", "r")) == NULL)
return;
while (fgets(buf, sizeof(buf), fp)) {
if (strncmp(buf, "CPU architecture:", 17) == 0) {
jit_cpu.version = strtol(buf + 17, &ptr, 10);
while (*ptr) {
if (*ptr == 'T' || *ptr == 't') {
++ptr;
jit_cpu.thumb = 1;
}
else if (*ptr == 'E' || *ptr == 'e') {
jit_cpu.extend = 1;
++ptr;
}
else
++ptr;
}
}
else if (strncmp(buf, "Features\t:", 10) == 0) {
if ((ptr = strstr(buf + 10, "vfpv")))
jit_cpu.vfp = strtol(ptr + 4, NULL, 0);
if ((ptr = strstr(buf + 10, "neon")))
jit_cpu.neon = 1;
if ((ptr = strstr(buf + 10, "thumb")))
jit_cpu.thumb = 1;
}
}
fclose(fp);
#endif
#if defined(__ARM_PCS_VFP)
if (!jit_cpu.vfp)
jit_cpu.vfp = 3;
if (!jit_cpu.version)
jit_cpu.version = 7;
jit_cpu.abi = 1;
#endif
/* armv6t2 todo (software float and thumb2) */
if (!jit_cpu.vfp && jit_cpu.thumb)
jit_cpu.thumb = 0;
}
#endif /* __lightning_funcs_h */
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