263 lines
10 KiB
C
263 lines
10 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_device(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 *ret_val = aml_local(0);
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Aml *slot_arg0 = aml_arg(0);
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Aml *slots_nr = aml_name(MEMORY_SLOTS_NUMBER);
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Aml *ctrl_lock = aml_name(MEMORY_SLOT_LOCK);
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Aml *slot_selector = aml_name(MEMORY_SLOT_SLECTOR);
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aml_append(mem_ctrl_dev, aml_name_decl("_HID", aml_string("PNP0A06")));
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aml_append(mem_ctrl_dev,
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aml_name_decl("_UID", aml_string("Memory hotplug resources")));
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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(MEMORY_SLOT_LOCK, 0));
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method = aml_method(MEMORY_SLOT_SCAN_METHOD, 0, 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(MEMORY_SLOT_INSERT_EVENT);
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Aml *rm_evt = aml_name(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(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(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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method = aml_method(MEMORY_SLOT_STATUS_METHOD, 1, AML_NOTSERIALIZED);
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{
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Aml *slot_enabled = aml_name(MEMORY_SLOT_ENABLED);
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aml_append(method, aml_store(zero, ret_val));
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aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
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aml_append(method,
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aml_store(aml_to_integer(slot_arg0), slot_selector));
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ifctx = aml_if(aml_equal(slot_enabled, one));
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{
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aml_append(ifctx, aml_store(aml_int(0xF), ret_val));
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}
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aml_append(method, ifctx);
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aml_append(method, aml_release(ctrl_lock));
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aml_append(method, aml_return(ret_val));
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}
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aml_append(mem_ctrl_dev, method);
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method = aml_method(MEMORY_SLOT_CRS_METHOD, 1, AML_SERIALIZED);
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{
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Aml *mr64 = aml_name("MR64");
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Aml *mr32 = aml_name("MR32");
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Aml *crs_tmpl = aml_resource_template();
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Aml *minl = aml_name("MINL");
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Aml *minh = aml_name("MINH");
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Aml *maxl = aml_name("MAXL");
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Aml *maxh = aml_name("MAXH");
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Aml *lenl = aml_name("LENL");
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Aml *lenh = aml_name("LENH");
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aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
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aml_append(method, aml_store(aml_to_integer(slot_arg0),
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slot_selector));
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aml_append(crs_tmpl,
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aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
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AML_CACHEABLE, AML_READ_WRITE,
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0, 0x0, 0xFFFFFFFFFFFFFFFEULL, 0,
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0xFFFFFFFFFFFFFFFFULL));
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aml_append(method, aml_name_decl("MR64", crs_tmpl));
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aml_append(method,
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aml_create_dword_field(mr64, aml_int(14), "MINL"));
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aml_append(method,
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aml_create_dword_field(mr64, aml_int(18), "MINH"));
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aml_append(method,
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aml_create_dword_field(mr64, aml_int(38), "LENL"));
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aml_append(method,
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aml_create_dword_field(mr64, aml_int(42), "LENH"));
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aml_append(method,
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aml_create_dword_field(mr64, aml_int(22), "MAXL"));
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aml_append(method,
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aml_create_dword_field(mr64, aml_int(26), "MAXH"));
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aml_append(method,
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aml_store(aml_name(MEMORY_SLOT_ADDR_HIGH), minh));
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aml_append(method,
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aml_store(aml_name(MEMORY_SLOT_ADDR_LOW), minl));
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aml_append(method,
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aml_store(aml_name(MEMORY_SLOT_SIZE_HIGH), lenh));
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aml_append(method,
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aml_store(aml_name(MEMORY_SLOT_SIZE_LOW), lenl));
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/* 64-bit math: MAX = MIN + LEN - 1 */
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aml_append(method, aml_add(minl, lenl, maxl));
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aml_append(method, aml_add(minh, lenh, maxh));
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ifctx = aml_if(aml_lless(maxl, minl));
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{
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aml_append(ifctx, aml_add(maxh, one, maxh));
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}
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aml_append(method, ifctx);
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ifctx = aml_if(aml_lless(maxl, one));
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{
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aml_append(ifctx, aml_subtract(maxh, one, maxh));
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}
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aml_append(method, ifctx);
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aml_append(method, aml_subtract(maxl, one, maxl));
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/* return 32-bit _CRS if addr/size is in low mem */
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/* TODO: remove it since all hotplugged DIMMs are in high mem */
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ifctx = aml_if(aml_equal(maxh, zero));
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{
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crs_tmpl = aml_resource_template();
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aml_append(crs_tmpl,
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aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED,
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AML_MAX_FIXED, AML_CACHEABLE,
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AML_READ_WRITE,
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0, 0x0, 0xFFFFFFFE, 0,
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0xFFFFFFFF));
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aml_append(ifctx, aml_name_decl("MR32", crs_tmpl));
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aml_append(ifctx,
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aml_create_dword_field(mr32, aml_int(10), "MIN"));
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aml_append(ifctx,
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aml_create_dword_field(mr32, aml_int(14), "MAX"));
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aml_append(ifctx,
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aml_create_dword_field(mr32, aml_int(22), "LEN"));
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aml_append(ifctx, aml_store(minl, aml_name("MIN")));
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aml_append(ifctx, aml_store(maxl, aml_name("MAX")));
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aml_append(ifctx, aml_store(lenl, aml_name("LEN")));
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aml_append(ifctx, aml_release(ctrl_lock));
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aml_append(ifctx, aml_return(mr32));
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}
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aml_append(method, ifctx);
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aml_append(method, aml_release(ctrl_lock));
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aml_append(method, aml_return(mr64));
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}
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aml_append(mem_ctrl_dev, method);
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method = aml_method(MEMORY_SLOT_PROXIMITY_METHOD, 1,
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AML_NOTSERIALIZED);
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{
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Aml *proximity = aml_name(MEMORY_SLOT_PROXIMITY);
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aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
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aml_append(method, aml_store(aml_to_integer(slot_arg0),
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slot_selector));
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aml_append(method, aml_store(proximity, ret_val));
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aml_append(method, aml_release(ctrl_lock));
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aml_append(method, aml_return(ret_val));
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}
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aml_append(mem_ctrl_dev, method);
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method = aml_method(MEMORY_SLOT_OST_METHOD, 4, AML_NOTSERIALIZED);
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{
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Aml *ost_evt = aml_name(MEMORY_SLOT_OST_EVENT);
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Aml *ost_status = aml_name(MEMORY_SLOT_OST_STATUS);
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aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
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aml_append(method, aml_store(aml_to_integer(slot_arg0),
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slot_selector));
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aml_append(method, aml_store(aml_arg(1), ost_evt));
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aml_append(method, aml_store(aml_arg(2), ost_status));
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aml_append(method, aml_release(ctrl_lock));
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}
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aml_append(mem_ctrl_dev, method);
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method = aml_method(MEMORY_SLOT_EJECT_METHOD, 2, AML_NOTSERIALIZED);
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{
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Aml *eject = aml_name(MEMORY_SLOT_EJECT);
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aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
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aml_append(method, aml_store(aml_to_integer(slot_arg0),
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slot_selector));
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aml_append(method, aml_store(one, eject));
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aml_append(method, aml_release(ctrl_lock));
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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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