[deliverable/linux.git] / include / asm-x86 / acpi.h

#ifndef _ASM_X86_ACPI_H
#define _ASM_X86_ACPI_H

#ifdef CONFIG_X86_32
# include "acpi_32.h"
#else
# include "acpi_64.h"
#endif

#include <asm/processor.h>

/*
 * Check if the CPU can handle C2 and deeper
 */
static inline unsigned int acpi_processor_cstate_check(unsigned int max_cstate)
{
	/*
	 * Early models (<=5) of AMD Opterons are not supposed to go into
	 * C2 state.
	 *
	 * Steppings 0x0A and later are good
	 */
	if (boot_cpu_data.x86 == 0x0F &&
	    boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
	    boot_cpu_data.x86_model <= 0x05 &&
	    boot_cpu_data.x86_mask < 0x0A)
		return 1;
	else
		return max_cstate;
}

#endif
Commit	Line	Data
c1c30634 AS	1	#ifndef _ASM_X86_ACPI_H
	2	#define _ASM_X86_ACPI_H
	3
96a388de TG	4	#ifdef CONFIG_X86_32
	5	# include "acpi_32.h"
	6	#else
	7	# include "acpi_64.h"
	8	#endif
c1c30634 AS	9
	10	#include <asm/processor.h>
	11
	12	/*
	13	* Check if the CPU can handle C2 and deeper
	14	*/
	15	static inline unsigned int acpi_processor_cstate_check(unsigned int max_cstate)
	16	{
	17	/*
	18	* Early models (<=5) of AMD Opterons are not supposed to go into
	19	* C2 state.
	20	*
	21	* Steppings 0x0A and later are good
	22	*/
	23	if (boot_cpu_data.x86 == 0x0F &&
	24	boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
	25	boot_cpu_data.x86_model <= 0x05 &&
	26	boot_cpu_data.x86_mask < 0x0A)
	27	return 1;
	28	else
	29	return max_cstate;
	30	}
	31
	32	#endif