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path: root/drivers/acpi/processor_core.c
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Diffstat (limited to 'drivers/acpi/processor_core.c')
-rw-r--r--drivers/acpi/processor_core.c56
1 files changed, 28 insertions, 28 deletions
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 342942f90a10..02e48394276c 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -69,7 +69,7 @@ static int map_madt_entry(int type, u32 acpi_id)
69 unsigned long madt_end, entry; 69 unsigned long madt_end, entry;
70 static struct acpi_table_madt *madt; 70 static struct acpi_table_madt *madt;
71 static int read_madt; 71 static int read_madt;
72 int apic_id = -1; 72 int phys_id = -1; /* CPU hardware ID */
73 73
74 if (!read_madt) { 74 if (!read_madt) {
75 if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, 75 if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0,
@@ -79,7 +79,7 @@ static int map_madt_entry(int type, u32 acpi_id)
79 } 79 }
80 80
81 if (!madt) 81 if (!madt)
82 return apic_id; 82 return phys_id;
83 83
84 entry = (unsigned long)madt; 84 entry = (unsigned long)madt;
85 madt_end = entry + madt->header.length; 85 madt_end = entry + madt->header.length;
@@ -91,18 +91,18 @@ static int map_madt_entry(int type, u32 acpi_id)
91 struct acpi_subtable_header *header = 91 struct acpi_subtable_header *header =
92 (struct acpi_subtable_header *)entry; 92 (struct acpi_subtable_header *)entry;
93 if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { 93 if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) {
94 if (!map_lapic_id(header, acpi_id, &apic_id)) 94 if (!map_lapic_id(header, acpi_id, &phys_id))
95 break; 95 break;
96 } else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) { 96 } else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) {
97 if (!map_x2apic_id(header, type, acpi_id, &apic_id)) 97 if (!map_x2apic_id(header, type, acpi_id, &phys_id))
98 break; 98 break;
99 } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { 99 } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
100 if (!map_lsapic_id(header, type, acpi_id, &apic_id)) 100 if (!map_lsapic_id(header, type, acpi_id, &phys_id))
101 break; 101 break;
102 } 102 }
103 entry += header->length; 103 entry += header->length;
104 } 104 }
105 return apic_id; 105 return phys_id;
106} 106}
107 107
108static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id) 108static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id)
@@ -110,7 +110,7 @@ static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id)
110 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 110 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
111 union acpi_object *obj; 111 union acpi_object *obj;
112 struct acpi_subtable_header *header; 112 struct acpi_subtable_header *header;
113 int apic_id = -1; 113 int phys_id = -1;
114 114
115 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 115 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
116 goto exit; 116 goto exit;
@@ -126,38 +126,38 @@ static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id)
126 126
127 header = (struct acpi_subtable_header *)obj->buffer.pointer; 127 header = (struct acpi_subtable_header *)obj->buffer.pointer;
128 if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) 128 if (header->type == ACPI_MADT_TYPE_LOCAL_APIC)
129 map_lapic_id(header, acpi_id, &apic_id); 129 map_lapic_id(header, acpi_id, &phys_id);
130 else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) 130 else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC)
131 map_lsapic_id(header, type, acpi_id, &apic_id); 131 map_lsapic_id(header, type, acpi_id, &phys_id);
132 else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) 132 else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC)
133 map_x2apic_id(header, type, acpi_id, &apic_id); 133 map_x2apic_id(header, type, acpi_id, &phys_id);
134 134
135exit: 135exit:
136 kfree(buffer.pointer); 136 kfree(buffer.pointer);
137 return apic_id; 137 return phys_id;
138} 138}
139 139
140int acpi_get_apicid(acpi_handle handle, int type, u32 acpi_id) 140int acpi_get_phys_id(acpi_handle handle, int type, u32 acpi_id)
141{ 141{
142 int apic_id; 142 int phys_id;
143 143
144 apic_id = map_mat_entry(handle, type, acpi_id); 144 phys_id = map_mat_entry(handle, type, acpi_id);
145 if (apic_id == -1) 145 if (phys_id == -1)
146 apic_id = map_madt_entry(type, acpi_id); 146 phys_id = map_madt_entry(type, acpi_id);
147 147
148 return apic_id; 148 return phys_id;
149} 149}
150 150
151int acpi_map_cpuid(int apic_id, u32 acpi_id) 151int acpi_map_cpuid(int phys_id, u32 acpi_id)
152{ 152{
153#ifdef CONFIG_SMP 153#ifdef CONFIG_SMP
154 int i; 154 int i;
155#endif 155#endif
156 156
157 if (apic_id == -1) { 157 if (phys_id == -1) {
158 /* 158 /*
159 * On UP processor, there is no _MAT or MADT table. 159 * On UP processor, there is no _MAT or MADT table.
160 * So above apic_id is always set to -1. 160 * So above phys_id is always set to -1.
161 * 161 *
162 * BIOS may define multiple CPU handles even for UP processor. 162 * BIOS may define multiple CPU handles even for UP processor.
163 * For example, 163 * For example,
@@ -170,7 +170,7 @@ int acpi_map_cpuid(int apic_id, u32 acpi_id)
170 * Processor (CPU3, 0x03, 0x00000410, 0x06) {} 170 * Processor (CPU3, 0x03, 0x00000410, 0x06) {}
171 * } 171 * }
172 * 172 *
173 * Ignores apic_id and always returns 0 for the processor 173 * Ignores phys_id and always returns 0 for the processor
174 * handle with acpi id 0 if nr_cpu_ids is 1. 174 * handle with acpi id 0 if nr_cpu_ids is 1.
175 * This should be the case if SMP tables are not found. 175 * This should be the case if SMP tables are not found.
176 * Return -1 for other CPU's handle. 176 * Return -1 for other CPU's handle.
@@ -178,28 +178,28 @@ int acpi_map_cpuid(int apic_id, u32 acpi_id)
178 if (nr_cpu_ids <= 1 && acpi_id == 0) 178 if (nr_cpu_ids <= 1 && acpi_id == 0)
179 return acpi_id; 179 return acpi_id;
180 else 180 else
181 return apic_id; 181 return phys_id;
182 } 182 }
183 183
184#ifdef CONFIG_SMP 184#ifdef CONFIG_SMP
185 for_each_possible_cpu(i) { 185 for_each_possible_cpu(i) {
186 if (cpu_physical_id(i) == apic_id) 186 if (cpu_physical_id(i) == phys_id)
187 return i; 187 return i;
188 } 188 }
189#else 189#else
190 /* In UP kernel, only processor 0 is valid */ 190 /* In UP kernel, only processor 0 is valid */
191 if (apic_id == 0) 191 if (phys_id == 0)
192 return apic_id; 192 return phys_id;
193#endif 193#endif
194 return -1; 194 return -1;
195} 195}
196 196
197int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id) 197int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id)
198{ 198{
199 int apic_id; 199 int phys_id;
200 200
201 apic_id = acpi_get_apicid(handle, type, acpi_id); 201 phys_id = acpi_get_phys_id(handle, type, acpi_id);
202 202
203 return acpi_map_cpuid(apic_id, acpi_id); 203 return acpi_map_cpuid(phys_id, acpi_id);
204} 204}
205EXPORT_SYMBOL_GPL(acpi_get_cpuid); 205EXPORT_SYMBOL_GPL(acpi_get_cpuid);