PM: Acquire device locks on suspend
[linux-2.6] / include / asm-x86 / acpi.h
1 #ifndef _ASM_X86_ACPI_H
2 #define _ASM_X86_ACPI_H
3
4 #ifdef CONFIG_X86_32
5 # include "acpi_32.h"
6 #else
7 # include "acpi_64.h"
8 #endif
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