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