static void __init init_other_cpus(void)
{
if (use_intel())
get_mtrr_state();
/* bring up the other processors */
set_mtrr(~0U,0,0,0);
if (use_intel()) {
finalize_mtrr_state();
mtrr_state_warn();
}
}
/**
* mtrr_bp_init - initialize mtrrs on the boot CPU
*
* This needs to be called early; before any of the other CPUs are
* initialized (i.e. before smp_init()).
*
*/
void __init mtrr_bp_init(void)
{
u32 phys_addr;
init_ifs();
phys_addr = 32;
if (cpu_has_mtrr) {
mtrr_if = &generic_mtrr_ops;
size_or_mask = 0xff000000; /* 36 bits */
size_and_mask = 0x00f00000;
phys_addr = 36;
/*
* This is an AMD specific MSR, but we assume(hope?) that
* Intel will implement it to when they extend the address
* bus of the Xeon.
*/
if (cpuid_eax(0x80000000) >= 0x80000008) {
phys_addr = cpuid_eax(0x80000008) & 0xff;
/* CPUID workaround for Intel 0F33/0F34 CPU */
if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL &&
boot_cpu_data.x86 == 0xF &&
boot_cpu_data.x86_model == 0x3 &&
(boot_cpu_data.x86_mask == 0x3 ||
boot_cpu_data.x86_mask == 0x4))
phys_addr = 36;
size_or_mask = ~((1ULL << (phys_addr - PAGE_SHIFT)) - 1);
size_and_mask = ~size_or_mask & 0xfffff00000ULL;
} else if (boot_cpu_data.x86_vendor == X86_VENDOR_CENTAUR &&
boot_cpu_data.x86 == 6) {
/*
* VIA C* family have Intel style MTRRs,
* but don't support PAE
*/
size_or_mask = 0xfff00000; /* 32 bits */
size_and_mask = 0;
phys_addr = 32;
}
} else {
switch (boot_cpu_data.x86_vendor) {
case X86_VENDOR_AMD:
if (cpu_has_k6_mtrr) {
/* Pre-Athlon (K6) AMD CPU MTRRs */
mtrr_if = mtrr_ops[X86_VENDOR_AMD];
size_or_mask = 0xfff00000; /* 32 bits */
size_and_mask = 0;
}
break;
case X86_VENDOR_CENTAUR:
if (cpu_has_centaur_mcr) {
mtrr_if = mtrr_ops[X86_VENDOR_CENTAUR];
size_or_mask = 0xfff00000; /* 32 bits */
size_and_mask = 0;
}
break;
case X86_VENDOR_CYRIX:
if (cpu_has_cyrix_arr) {
mtrr_if = mtrr_ops[X86_VENDOR_CYRIX];
size_or_mask = 0xfff00000; /* 32 bits */
size_and_mask = 0;
}
break;
default:
break;
}
}
if (mtrr_if) {
set_num_var_ranges();
init_table();
if (use_intel()) {
get_mtrr_state();
if (mtrr_cleanup(phys_addr)) {
changed_by_mtrr_cleanup = 1;
mtrr_if->set_all();
}
}
}
}