You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
61 lines
1.5 KiB
61 lines
1.5 KiB
/*
|
|
* Copyright (C) 1994 Linus Torvalds
|
|
*
|
|
* Cyrix stuff, June 1998 by:
|
|
* - Rafael R. Reilova (moved everything from head.S),
|
|
* <rreilova@ececs.uc.edu>
|
|
* - Channing Corn (tests & fixes),
|
|
* - Andrew D. Balsa (code cleanup).
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/utsname.h>
|
|
#include <asm/bugs.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/processor-flags.h>
|
|
#include <asm/fpu/internal.h>
|
|
#include <asm/msr.h>
|
|
#include <asm/paravirt.h>
|
|
#include <asm/alternative.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/cacheflush.h>
|
|
|
|
void __init check_bugs(void)
|
|
{
|
|
identify_boot_cpu();
|
|
|
|
if (!IS_ENABLED(CONFIG_SMP)) {
|
|
pr_info("CPU: ");
|
|
print_cpu_info(&boot_cpu_data);
|
|
}
|
|
|
|
#ifdef CONFIG_X86_32
|
|
/*
|
|
* Check whether we are able to run this kernel safely on SMP.
|
|
*
|
|
* - i386 is no longer supported.
|
|
* - In order to run on anything without a TSC, we need to be
|
|
* compiled for a i486.
|
|
*/
|
|
if (boot_cpu_data.x86 < 4)
|
|
panic("Kernel requires i486+ for 'invlpg' and other features");
|
|
|
|
init_utsname()->machine[1] =
|
|
'0' + (boot_cpu_data.x86 > 6 ? 6 : boot_cpu_data.x86);
|
|
alternative_instructions();
|
|
|
|
fpu__init_check_bugs();
|
|
#else /* CONFIG_X86_64 */
|
|
alternative_instructions();
|
|
|
|
/*
|
|
* Make sure the first 2MB area is not mapped by huge pages
|
|
* There are typically fixed size MTRRs in there and overlapping
|
|
* MTRRs into large pages causes slow downs.
|
|
*
|
|
* Right now we don't do that with gbpages because there seems
|
|
* very little benefit for that case.
|
|
*/
|
|
if (!direct_gbpages)
|
|
set_memory_4k((unsigned long)__va(0), 1);
|
|
#endif
|
|
}
|
|
|