Commit | Line | Data |
---|---|---|
05131ecc | 1 | /* |
f30c2269 | 2 | * arch/ia64/kernel/acpi-processor.c |
05131ecc VP |
3 | * |
4 | * Copyright (C) 2005 Intel Corporation | |
5 | * Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> | |
6 | * - Added _PDC for platforms with Intel CPUs | |
7 | */ | |
8 | ||
9 | #include <linux/kernel.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/acpi.h> | |
13 | ||
14 | #include <acpi/processor.h> | |
15 | #include <asm/acpi.h> | |
16 | ||
17 | static void init_intel_pdc(struct acpi_processor *pr) | |
18 | { | |
19 | struct acpi_object_list *obj_list; | |
20 | union acpi_object *obj; | |
21 | u32 *buf; | |
22 | ||
23 | /* allocate and initialize pdc. It will be used later. */ | |
24 | obj_list = kmalloc(sizeof(struct acpi_object_list), GFP_KERNEL); | |
25 | if (!obj_list) { | |
26 | printk(KERN_ERR "Memory allocation error\n"); | |
27 | return; | |
28 | } | |
29 | ||
30 | obj = kmalloc(sizeof(union acpi_object), GFP_KERNEL); | |
31 | if (!obj) { | |
32 | printk(KERN_ERR "Memory allocation error\n"); | |
33 | kfree(obj_list); | |
34 | return; | |
35 | } | |
36 | ||
37 | buf = kmalloc(12, GFP_KERNEL); | |
38 | if (!buf) { | |
39 | printk(KERN_ERR "Memory allocation error\n"); | |
40 | kfree(obj); | |
41 | kfree(obj_list); | |
42 | return; | |
43 | } | |
44 | ||
45 | buf[0] = ACPI_PDC_REVISION_ID; | |
46 | buf[1] = 1; | |
ce45b51a | 47 | buf[2] = ACPI_PDC_EST_CAPABILITY_SMP; |
3abbd337 ZY |
48 | /* |
49 | * The default of PDC_SMP_T_SWCOORD bit is set for IA64 cpu so | |
50 | * that OSPM is capable of native ACPI throttling software | |
51 | * coordination using BIOS supplied _TSD info. | |
52 | */ | |
53 | buf[2] |= ACPI_PDC_SMP_T_SWCOORD; | |
05131ecc VP |
54 | |
55 | obj->type = ACPI_TYPE_BUFFER; | |
56 | obj->buffer.length = 12; | |
57 | obj->buffer.pointer = (u8 *) buf; | |
58 | obj_list->count = 1; | |
59 | obj_list->pointer = obj; | |
60 | pr->pdc = obj_list; | |
61 | ||
62 | return; | |
63 | } | |
64 | ||
65 | /* Initialize _PDC data based on the CPU vendor */ | |
66 | void arch_acpi_processor_init_pdc(struct acpi_processor *pr) | |
67 | { | |
68 | pr->pdc = NULL; | |
69 | init_intel_pdc(pr); | |
70 | return; | |
71 | } | |
72 | ||
73 | EXPORT_SYMBOL(arch_acpi_processor_init_pdc); | |
7b768f07 PV |
74 | |
75 | void arch_acpi_processor_cleanup_pdc(struct acpi_processor *pr) | |
76 | { | |
77 | if (pr->pdc) { | |
78 | kfree(pr->pdc->pointer->buffer.pointer); | |
79 | kfree(pr->pdc->pointer); | |
80 | kfree(pr->pdc); | |
81 | pr->pdc = NULL; | |
82 | } | |
83 | } | |
84 | ||
85 | EXPORT_SYMBOL(arch_acpi_processor_cleanup_pdc); |