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