void
cpu_init(struct cpu_info *ci)
{
u_int cr4 = 0;
/* configure the CPU if needed */
if (ci->cpu_setup != NULL)
(*ci->cpu_setup)(ci);
/*
* We do this here after identifycpu() because errata may affect
* what we do.
*/
patinit(ci);
/*
* Enable ring 0 write protection (486 or above, but 386
* no longer supported).
*/
lcr0(rcr0() | CR0_WP);
if (cpu_feature & CPUID_PGE)
cr4 |= CR4_PGE; /* enable global TLB caching */
if (ci->ci_feature_sefflags_ebx & SEFF0EBX_SMEP)
cr4 |= CR4_SMEP;
#ifndef SMALL_KERNEL
if (ci->ci_feature_sefflags_ebx & SEFF0EBX_SMAP)
cr4 |= CR4_SMAP;
if (ci->ci_feature_sefflags_ecx & SEFF0ECX_UMIP)
cr4 |= CR4_UMIP;
#endif
/*
* If we have FXSAVE/FXRESTOR, use them.
*/
if (cpu_feature & CPUID_FXSR) {
cr4 |= CR4_OSFXSR;
/*
* If we have SSE/SSE2, enable XMM exceptions.
*/
if (cpu_feature & (CPUID_SSE|CPUID_SSE2))
cr4 |= CR4_OSXMMEXCPT;
}
/* no cr4 on most 486s */
if (cr4 != 0)
lcr4(rcr4()|cr4);
#ifdef MULTIPROCESSOR
ci->ci_flags |= CPUF_RUNNING;
tlbflushg();
#endif
}
void
cpu_init(struct cpu_info *ci)
{
/* configure the CPU if needed */
if (ci->cpu_setup != NULL)
(*ci->cpu_setup)(ci);
/*
* We do this here after identifycpu() because errata may affect
* what we do.
*/
patinit(ci);
lcr0(rcr0() | CR0_WP);
lcr4(rcr4() | CR4_DEFAULT);
#ifdef MULTIPROCESSOR
ci->ci_flags |= CPUF_RUNNING;
tlbflushg();
#endif
}
