| Alexey Starikovskiy | c1c3063 | 2007-11-26 20:42:19 +0100 | [diff] [blame] | 1 | #ifndef _ASM_X86_ACPI_H |
| 2 | #define _ASM_X86_ACPI_H |
| 3 | |
| Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 4 | #ifdef CONFIG_X86_32 |
| 5 | # include "acpi_32.h" |
| 6 | #else |
| 7 | # include "acpi_64.h" |
| 8 | #endif |
| Alexey Starikovskiy | c1c3063 | 2007-11-26 20:42:19 +0100 | [diff] [blame] | 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 |