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e8f9db491d
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>
107 lines
3.7 KiB
C
107 lines
3.7 KiB
C
/*
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* Memory hotplug AML code of DSDT ACPI table
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*
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* Copyright (C) 2015 Red Hat Inc
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*
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* Author: Igor Mammedov <imammedo@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include <stdbool.h>
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#include "hw/acpi/memory_hotplug.h"
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#include "include/hw/acpi/pc-hotplug.h"
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#include "hw/boards.h"
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void build_memory_hotplug_aml(Aml *ctx, uint32_t nr_mem,
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uint16_t io_base, uint16_t io_len)
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{
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Aml *ifctx;
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Aml *method;
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Aml *pci_scope;
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Aml *mem_ctrl_dev;
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/* scope for memory hotplug controller device node */
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pci_scope = aml_scope("_SB.PCI0");
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mem_ctrl_dev = aml_scope(stringify(MEMORY_HOTPLUG_DEVICE));
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{
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Aml *one = aml_int(1);
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Aml *zero = aml_int(0);
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Aml *slots_nr = aml_name(stringify(MEMORY_SLOTS_NUMBER));
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Aml *ctrl_lock = aml_name(stringify(MEMORY_SLOT_LOCK));
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Aml *slot_selector = aml_name(stringify(MEMORY_SLOT_SLECTOR));
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method = aml_method("_STA", 0, AML_NOTSERIALIZED);
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ifctx = aml_if(aml_equal(slots_nr, zero));
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{
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aml_append(ifctx, aml_return(zero));
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}
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aml_append(method, ifctx);
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/* present, functioning, decoding, not shown in UI */
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aml_append(method, aml_return(aml_int(0xB)));
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aml_append(mem_ctrl_dev, method);
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aml_append(mem_ctrl_dev, aml_mutex(stringify(MEMORY_SLOT_LOCK), 0));
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method = aml_method(stringify(MEMORY_SLOT_SCAN_METHOD), 0,
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AML_NOTSERIALIZED);
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{
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Aml *else_ctx;
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Aml *while_ctx;
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Aml *idx = aml_local(0);
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Aml *eject_req = aml_int(3);
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Aml *dev_chk = aml_int(1);
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ifctx = aml_if(aml_equal(slots_nr, zero));
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{
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aml_append(ifctx, aml_return(zero));
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}
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aml_append(method, ifctx);
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aml_append(method, aml_store(zero, idx));
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aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
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/* build AML that:
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* loops over all slots and Notifies DIMMs with
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* Device Check or Eject Request notifications if
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* slot has corresponding status bit set and clears
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* slot status.
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*/
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while_ctx = aml_while(aml_lless(idx, slots_nr));
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{
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Aml *ins_evt = aml_name(stringify(MEMORY_SLOT_INSERT_EVENT));
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Aml *rm_evt = aml_name(stringify(MEMORY_SLOT_REMOVE_EVENT));
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aml_append(while_ctx, aml_store(idx, slot_selector));
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ifctx = aml_if(aml_equal(ins_evt, one));
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{
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aml_append(ifctx,
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aml_call2(stringify(MEMORY_SLOT_NOTIFY_METHOD),
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idx, dev_chk));
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aml_append(ifctx, aml_store(one, ins_evt));
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}
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aml_append(while_ctx, ifctx);
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else_ctx = aml_else();
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ifctx = aml_if(aml_equal(rm_evt, one));
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{
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aml_append(ifctx,
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aml_call2(stringify(MEMORY_SLOT_NOTIFY_METHOD),
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idx, eject_req));
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aml_append(ifctx, aml_store(one, rm_evt));
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}
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aml_append(else_ctx, ifctx);
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aml_append(while_ctx, else_ctx);
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aml_append(while_ctx, aml_add(idx, one, idx));
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}
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aml_append(method, while_ctx);
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aml_append(method, aml_release(ctrl_lock));
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aml_append(method, aml_return(one));
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}
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aml_append(mem_ctrl_dev, method);
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}
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aml_append(pci_scope, mem_ctrl_dev);
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aml_append(ctx, pci_scope);
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}
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