mirror of https://gitee.com/openkylin/qemu.git
72 lines
1.5 KiB
C
72 lines
1.5 KiB
C
#include "cache-utils.h"
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#ifdef __powerpc__
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struct qemu_cache_conf qemu_cache_conf = {
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.dcache_bsize = 16,
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.icache_bsize = 16
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};
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#if defined _AIX
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#include <sys/systemcfg.h>
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static void ppc_init_cacheline_sizes(void)
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{
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qemu_cache_conf.icache_bsize = _system_configuration.icache_line;
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qemu_cache_conf.dcache_bsize = _system_configuration.dcache_line;
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}
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#elif defined __linux__
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#define QEMU_AT_NULL 0
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#define QEMU_AT_DCACHEBSIZE 19
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#define QEMU_AT_ICACHEBSIZE 20
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static void ppc_init_cacheline_sizes(char **envp)
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{
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unsigned long *auxv;
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while (*envp++);
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for (auxv = (unsigned long *) envp; *auxv != QEMU_AT_NULL; auxv += 2) {
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switch (*auxv) {
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case QEMU_AT_DCACHEBSIZE: qemu_cache_conf.dcache_bsize = auxv[1]; break;
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case QEMU_AT_ICACHEBSIZE: qemu_cache_conf.icache_bsize = auxv[1]; break;
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default: break;
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}
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}
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}
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#elif defined __APPLE__
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#include <sys/types.h>
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#include <sys/sysctl.h>
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static void ppc_init_cacheline_sizes(void)
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{
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size_t len;
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unsigned cacheline;
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int name[2] = { CTL_HW, HW_CACHELINE };
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if (sysctl(name, 2, &cacheline, &len, NULL, 0)) {
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perror("sysctl CTL_HW HW_CACHELINE failed");
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} else {
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qemu_cache_conf.dcache_bsize = cacheline;
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qemu_cache_conf.icache_bsize = cacheline;
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}
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}
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#endif
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#ifdef __linux__
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void qemu_cache_utils_init(char **envp)
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{
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ppc_init_cacheline_sizes(envp);
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}
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#else
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void qemu_cache_utils_init(char **envp)
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{
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(void) envp;
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ppc_init_cacheline_sizes();
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}
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#endif
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#endif /* __powerpc__ */
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