hw/acpi/memory_hotplug_acpi_table.c

   1 /*
   2  * Memory hotplug AML code of DSDT ACPI table
   3  *
   4  * Copyright (C) 2015 Red Hat Inc
   5  *
   6  * Author: Igor Mammedov <imammedo@redhat.com>
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   9  * See the COPYING file in the top-level directory.
  10  */
  11
  12 #include "qemu/osdep.h"
  13 #include "hw/acpi/memory_hotplug.h"
  14 #include "include/hw/acpi/pc-hotplug.h"
  15 #include "hw/boards.h"
  16
  17 void build_memory_hotplug_aml(Aml *ctx, uint32_t nr_mem,
  18                               uint16_t io_base, uint16_t io_len)
  19 {
  20     Aml *ifctx;
  21     Aml *method;
  22     Aml *pci_scope;
  23     Aml *mem_ctrl_dev;
  24
  25     /* scope for memory hotplug controller device node */
  26     pci_scope = aml_scope("_SB.PCI0");
  27     mem_ctrl_dev = aml_device(MEMORY_HOTPLUG_DEVICE);
  28     {
  29         Aml *one = aml_int(1);
  30         Aml *zero = aml_int(0);
  31         Aml *ret_val = aml_local(0);
  32         Aml *slot_arg0 = aml_arg(0);
  33         Aml *slots_nr = aml_name(MEMORY_SLOTS_NUMBER);
  34         Aml *ctrl_lock = aml_name(MEMORY_SLOT_LOCK);
  35         Aml *slot_selector = aml_name(MEMORY_SLOT_SLECTOR);
  36
  37         aml_append(mem_ctrl_dev, aml_name_decl("_HID", aml_string("PNP0A06")));
  38         aml_append(mem_ctrl_dev,
  39             aml_name_decl("_UID", aml_string("Memory hotplug resources")));
  40
  41         method = aml_method("_STA", 0, AML_NOTSERIALIZED);
  42         ifctx = aml_if(aml_equal(slots_nr, zero));
  43         {
  44             aml_append(ifctx, aml_return(zero));
  45         }
  46         aml_append(method, ifctx);
  47         /* present, functioning, decoding, not shown in UI */
  48         aml_append(method, aml_return(aml_int(0xB)));
  49         aml_append(mem_ctrl_dev, method);
  50
  51         aml_append(mem_ctrl_dev, aml_mutex(MEMORY_SLOT_LOCK, 0));
  52
  53         method = aml_method(MEMORY_SLOT_SCAN_METHOD, 0, AML_NOTSERIALIZED);
  54         {
  55             Aml *else_ctx;
  56             Aml *while_ctx;
  57             Aml *idx = aml_local(0);
  58             Aml *eject_req = aml_int(3);
  59             Aml *dev_chk = aml_int(1);
  60
  61             ifctx = aml_if(aml_equal(slots_nr, zero));
  62             {
  63                 aml_append(ifctx, aml_return(zero));
  64             }
  65             aml_append(method, ifctx);
  66
  67             aml_append(method, aml_store(zero, idx));
  68             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
  69             /* build AML that:
  70              * loops over all slots and Notifies DIMMs with
  71              * Device Check or Eject Request notifications if
  72              * slot has corresponding status bit set and clears
  73              * slot status.
  74              */
  75             while_ctx = aml_while(aml_lless(idx, slots_nr));
  76             {
  77                 Aml *ins_evt = aml_name(MEMORY_SLOT_INSERT_EVENT);
  78                 Aml *rm_evt = aml_name(MEMORY_SLOT_REMOVE_EVENT);
  79
  80                 aml_append(while_ctx, aml_store(idx, slot_selector));
  81                 ifctx = aml_if(aml_equal(ins_evt, one));
  82                 {
  83                     aml_append(ifctx,
  84                                aml_call2(MEMORY_SLOT_NOTIFY_METHOD,
  85                                          idx, dev_chk));
  86                     aml_append(ifctx, aml_store(one, ins_evt));
  87                 }
  88                 aml_append(while_ctx, ifctx);
  89
  90                 else_ctx = aml_else();
  91                 ifctx = aml_if(aml_equal(rm_evt, one));
  92                 {
  93                     aml_append(ifctx,
  94                         aml_call2(MEMORY_SLOT_NOTIFY_METHOD,
  95                                   idx, eject_req));
  96                     aml_append(ifctx, aml_store(one, rm_evt));
  97                 }
  98                 aml_append(else_ctx, ifctx);
  99                 aml_append(while_ctx, else_ctx);
 100
 101                 aml_append(while_ctx, aml_add(idx, one, idx));
 102             }
 103             aml_append(method, while_ctx);
 104             aml_append(method, aml_release(ctrl_lock));
 105             aml_append(method, aml_return(one));
 106         }
 107         aml_append(mem_ctrl_dev, method);
 108
 109         method = aml_method(MEMORY_SLOT_STATUS_METHOD, 1, AML_NOTSERIALIZED);
 110         {
 111             Aml *slot_enabled = aml_name(MEMORY_SLOT_ENABLED);
 112
 113             aml_append(method, aml_store(zero, ret_val));
 114             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 115             aml_append(method,
 116                 aml_store(aml_to_integer(slot_arg0), slot_selector));
 117
 118             ifctx = aml_if(aml_equal(slot_enabled, one));
 119             {
 120                 aml_append(ifctx, aml_store(aml_int(0xF), ret_val));
 121             }
 122             aml_append(method, ifctx);
 123
 124             aml_append(method, aml_release(ctrl_lock));
 125             aml_append(method, aml_return(ret_val));
 126         }
 127         aml_append(mem_ctrl_dev, method);
 128
 129         method = aml_method(MEMORY_SLOT_CRS_METHOD, 1, AML_SERIALIZED);
 130         {
 131             Aml *mr64 = aml_name("MR64");
 132             Aml *mr32 = aml_name("MR32");
 133             Aml *crs_tmpl = aml_resource_template();
 134             Aml *minl = aml_name("MINL");
 135             Aml *minh = aml_name("MINH");
 136             Aml *maxl =  aml_name("MAXL");
 137             Aml *maxh =  aml_name("MAXH");
 138             Aml *lenl = aml_name("LENL");
 139             Aml *lenh = aml_name("LENH");
 140
 141             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 142             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 143                                          slot_selector));
 144
 145             aml_append(crs_tmpl,
 146                 aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
 147                                  AML_CACHEABLE, AML_READ_WRITE,
 148                                  0, 0x0, 0xFFFFFFFFFFFFFFFEULL, 0,
 149                                  0xFFFFFFFFFFFFFFFFULL));
 150             aml_append(method, aml_name_decl("MR64", crs_tmpl));
 151             aml_append(method,
 152                 aml_create_dword_field(mr64, aml_int(14), "MINL"));
 153             aml_append(method,
 154                 aml_create_dword_field(mr64, aml_int(18), "MINH"));
 155             aml_append(method,
 156                 aml_create_dword_field(mr64, aml_int(38), "LENL"));
 157             aml_append(method,
 158                 aml_create_dword_field(mr64, aml_int(42), "LENH"));
 159             aml_append(method,
 160                 aml_create_dword_field(mr64, aml_int(22), "MAXL"));
 161             aml_append(method,
 162                 aml_create_dword_field(mr64, aml_int(26), "MAXH"));
 163
 164             aml_append(method,
 165                 aml_store(aml_name(MEMORY_SLOT_ADDR_HIGH), minh));
 166             aml_append(method,
 167                 aml_store(aml_name(MEMORY_SLOT_ADDR_LOW), minl));
 168             aml_append(method,
 169                 aml_store(aml_name(MEMORY_SLOT_SIZE_HIGH), lenh));
 170             aml_append(method,
 171                 aml_store(aml_name(MEMORY_SLOT_SIZE_LOW), lenl));
 172
 173             /* 64-bit math: MAX = MIN + LEN - 1 */
 174             aml_append(method, aml_add(minl, lenl, maxl));
 175             aml_append(method, aml_add(minh, lenh, maxh));
 176             ifctx = aml_if(aml_lless(maxl, minl));
 177             {
 178                 aml_append(ifctx, aml_add(maxh, one, maxh));
 179             }
 180             aml_append(method, ifctx);
 181             ifctx = aml_if(aml_lless(maxl, one));
 182             {
 183                 aml_append(ifctx, aml_subtract(maxh, one, maxh));
 184             }
 185             aml_append(method, ifctx);
 186             aml_append(method, aml_subtract(maxl, one, maxl));
 187
 188             /* return 32-bit _CRS if addr/size is in low mem */
 189             /* TODO: remove it since all hotplugged DIMMs are in high mem */
 190             ifctx = aml_if(aml_equal(maxh, zero));
 191             {
 192                 crs_tmpl = aml_resource_template();
 193                 aml_append(crs_tmpl,
 194                     aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED,
 195                                      AML_MAX_FIXED, AML_CACHEABLE,
 196                                      AML_READ_WRITE,
 197                                      0, 0x0, 0xFFFFFFFE, 0,
 198                                      0xFFFFFFFF));
 199                 aml_append(ifctx, aml_name_decl("MR32", crs_tmpl));
 200                 aml_append(ifctx,
 201                     aml_create_dword_field(mr32, aml_int(10), "MIN"));
 202                 aml_append(ifctx,
 203                     aml_create_dword_field(mr32, aml_int(14), "MAX"));
 204                 aml_append(ifctx,
 205                     aml_create_dword_field(mr32, aml_int(22), "LEN"));
 206                 aml_append(ifctx, aml_store(minl, aml_name("MIN")));
 207                 aml_append(ifctx, aml_store(maxl, aml_name("MAX")));
 208                 aml_append(ifctx, aml_store(lenl, aml_name("LEN")));
 209
 210                 aml_append(ifctx, aml_release(ctrl_lock));
 211                 aml_append(ifctx, aml_return(mr32));
 212             }
 213             aml_append(method, ifctx);
 214
 215             aml_append(method, aml_release(ctrl_lock));
 216             aml_append(method, aml_return(mr64));
 217         }
 218         aml_append(mem_ctrl_dev, method);
 219
 220         method = aml_method(MEMORY_SLOT_PROXIMITY_METHOD, 1,
 221                             AML_NOTSERIALIZED);
 222         {
 223             Aml *proximity = aml_name(MEMORY_SLOT_PROXIMITY);
 224
 225             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 226             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 227                                          slot_selector));
 228             aml_append(method, aml_store(proximity, ret_val));
 229             aml_append(method, aml_release(ctrl_lock));
 230             aml_append(method, aml_return(ret_val));
 231         }
 232         aml_append(mem_ctrl_dev, method);
 233
 234         method = aml_method(MEMORY_SLOT_OST_METHOD, 4, AML_NOTSERIALIZED);
 235         {
 236             Aml *ost_evt = aml_name(MEMORY_SLOT_OST_EVENT);
 237             Aml *ost_status = aml_name(MEMORY_SLOT_OST_STATUS);
 238
 239             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 240             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 241                                          slot_selector));
 242             aml_append(method, aml_store(aml_arg(1), ost_evt));
 243             aml_append(method, aml_store(aml_arg(2), ost_status));
 244             aml_append(method, aml_release(ctrl_lock));
 245         }
 246         aml_append(mem_ctrl_dev, method);
 247
 248         method = aml_method(MEMORY_SLOT_EJECT_METHOD, 2, AML_NOTSERIALIZED);
 249         {
 250             Aml *eject = aml_name(MEMORY_SLOT_EJECT);
 251
 252             aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
 253             aml_append(method, aml_store(aml_to_integer(slot_arg0),
 254                                          slot_selector));
 255             aml_append(method, aml_store(one, eject));
 256             aml_append(method, aml_release(ctrl_lock));
 257         }
 258         aml_append(mem_ctrl_dev, method);
 259     }
 260     aml_append(pci_scope, mem_ctrl_dev);
 261     aml_append(ctx, pci_scope);
 262 }