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Introduce and use cache-utils.[ch]

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Thanks to Segher Boessenkool and Holis Blanchard.

AIX and Darwin cache inquiry:
http://gcc.gnu.org/ml/gcc-patches/2007-08/msg00388.html

Auxiliary vectors:
http://manugarg.googlepages.com/aboutelfauxiliaryvectors

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5973 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
malc 2008-12-10 19:18:40 +00:00
parent 4fbfcd6d53
commit 902b3d5c39
8 changed files with 120 additions and 46 deletions
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68
cache-utils.c Normal file
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#include "cache-utils.h"
#ifdef __powerpc__
struct qemu_cache_conf qemu_cache_conf = {
.dcache_bsize = 16,
.icache_bsize = 16
};
#if defined _AIX
#include <sys/systemcfg.h>
static void ppc_init_cacheline_sizes(void)
{
qemu_cache_conf.icache_bsize = _system_configuration.icache_line;
qemu_cache_conf.dcache_bsize = _system_configuration.dcache_line;
}
#elif defined __linux__
#include <linux/auxvec.h>
static void ppc_init_cacheline_sizes(char **envp)
{
unsigned long *auxv;
while (*envp++);
for (auxv = (unsigned long *) envp; *auxv != AT_NULL; auxv += 2) {
switch (*auxv) {
case AT_DCACHEBSIZE: qemu_cache_conf.dcache_bsize = auxv[1]; break;
case AT_ICACHEBSIZE: qemu_cache_conf.icache_bsize = auxv[1]; break;
default: break;
}
}
}
#elif defined __APPLE__
#include <sys/types.h>
#include <sys/sysctl.h>
static void ppc_init_cacheline_sizes(void)
{
size_t len;
unsigned cacheline;
int name[2] = { CTL_HW, HW_CACHELINE };
if (sysctl(name, 2, &cacheline, &len, NULL, 0)) {
perror("sysctl CTL_HW HW_CACHELINE failed");
} else {
qemu_cache_conf.dcache_bsize = cacheline;
qemu_cache_conf.icache_bsize = cacheline;
}
}
#endif
#ifdef __linux__
void qemu_cache_utils_init(char **envp)
{
ppc_init_cacheline_sizes(envp);
}
#else
void qemu_cache_utils_init(char **envp)
{
(void) envp;
ppc_init_cacheline_sizes();
}
#endif
#endif /* __powerpc__ */