Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
136 lines
5 KiB
C
136 lines
5 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "hw/acpi/cpu_hotplug.h"
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void build_cpu_hotplug_aml(Aml *ctx)
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{
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Aml *method;
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Aml *if_ctx;
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Aml *else_ctx;
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Aml *sb_scope = aml_scope("_SB");
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uint8_t madt_tmpl[8] = {0x00, 0x08, 0x00, 0x00, 0x00, 0, 0, 0};
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Aml *cpu_id = aml_arg(0);
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Aml *cpu_on = aml_local(0);
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Aml *madt = aml_local(1);
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Aml *cpus_map = aml_name(CPU_ON_BITMAP);
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Aml *zero = aml_int(0);
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Aml *one = aml_int(1);
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/*
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* _MAT method - creates an madt apic buffer
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* cpu_id = Arg0 = Processor ID = Local APIC ID
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* cpu_on = Local0 = CPON flag for this cpu
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* madt = Local1 = Buffer (in madt apic form) to return
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*/
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method = aml_method(CPU_MAT_METHOD, 1, AML_NOTSERIALIZED);
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aml_append(method,
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aml_store(aml_derefof(aml_index(cpus_map, cpu_id)), cpu_on));
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aml_append(method,
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aml_store(aml_buffer(sizeof(madt_tmpl), madt_tmpl), madt));
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/* Update the processor id, lapic id, and enable/disable status */
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aml_append(method, aml_store(cpu_id, aml_index(madt, aml_int(2))));
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aml_append(method, aml_store(cpu_id, aml_index(madt, aml_int(3))));
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aml_append(method, aml_store(cpu_on, aml_index(madt, aml_int(4))));
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aml_append(method, aml_return(madt));
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aml_append(sb_scope, method);
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/*
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* _STA method - return ON status of cpu
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* cpu_id = Arg0 = Processor ID = Local APIC ID
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* cpu_on = Local0 = CPON flag for this cpu
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*/
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method = aml_method(CPU_STATUS_METHOD, 1, AML_NOTSERIALIZED);
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aml_append(method,
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aml_store(aml_derefof(aml_index(cpus_map, cpu_id)), cpu_on));
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if_ctx = aml_if(cpu_on);
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{
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aml_append(if_ctx, aml_return(aml_int(0xF)));
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}
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aml_append(method, if_ctx);
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else_ctx = aml_else();
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{
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aml_append(else_ctx, aml_return(zero));
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}
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aml_append(method, else_ctx);
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aml_append(sb_scope, method);
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method = aml_method(CPU_EJECT_METHOD, 2, AML_NOTSERIALIZED);
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aml_append(method, aml_sleep(200));
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aml_append(sb_scope, method);
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method = aml_method(stringify(CPU_SCAN_METHOD), 0, AML_NOTSERIALIZED);
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{
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Aml *while_ctx, *if_ctx2, *else_ctx2;
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Aml *bus_check_evt = aml_int(1);
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Aml *remove_evt = aml_int(3);
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Aml *status_map = aml_local(5); /* Local5 = active cpu bitmap */
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Aml *byte = aml_local(2); /* Local2 = last read byte from bitmap */
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Aml *idx = aml_local(0); /* Processor ID / APIC ID iterator */
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Aml *is_cpu_on = aml_local(1); /* Local1 = CPON flag for cpu */
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Aml *status = aml_local(3); /* Local3 = active state for cpu */
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aml_append(method, aml_store(aml_name(CPU_STATUS_MAP), status_map));
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aml_append(method, aml_store(zero, byte));
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aml_append(method, aml_store(zero, idx));
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/* While (idx < SizeOf(CPON)) */
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while_ctx = aml_while(aml_lless(idx, aml_sizeof(cpus_map)));
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aml_append(while_ctx,
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aml_store(aml_derefof(aml_index(cpus_map, idx)), is_cpu_on));
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if_ctx = aml_if(aml_and(idx, aml_int(0x07), NULL));
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{
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/* Shift down previously read bitmap byte */
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aml_append(if_ctx, aml_shiftright(byte, one, byte));
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}
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aml_append(while_ctx, if_ctx);
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else_ctx = aml_else();
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{
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/* Read next byte from cpu bitmap */
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aml_append(else_ctx, aml_store(aml_derefof(aml_index(status_map,
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aml_shiftright(idx, aml_int(3), NULL))), byte));
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}
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aml_append(while_ctx, else_ctx);
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aml_append(while_ctx, aml_store(aml_and(byte, one, NULL), status));
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if_ctx = aml_if(aml_lnot(aml_equal(is_cpu_on, status)));
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{
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/* State change - update CPON with new state */
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aml_append(if_ctx, aml_store(status, aml_index(cpus_map, idx)));
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if_ctx2 = aml_if(aml_equal(status, one));
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{
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aml_append(if_ctx2,
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aml_call2(AML_NOTIFY_METHOD, idx, bus_check_evt));
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}
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aml_append(if_ctx, if_ctx2);
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else_ctx2 = aml_else();
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{
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aml_append(else_ctx2,
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aml_call2(AML_NOTIFY_METHOD, idx, remove_evt));
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}
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}
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aml_append(if_ctx, else_ctx2);
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aml_append(while_ctx, if_ctx);
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aml_append(while_ctx, aml_increment(idx)); /* go to next cpu */
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aml_append(method, while_ctx);
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}
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aml_append(sb_scope, method);
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aml_append(ctx, sb_scope);
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}
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