| #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 |
