arch/x86/lib/acpigen.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2020 Google LLC
   4  */
   5
   6 #include <common.h>
   7 #include <acpi/acpigen.h>
   8 #include <acpi/acpi_table.h>
   9 #include <asm/acpigen.h>
  10
  11 void acpigen_write_empty_pct(struct acpi_ctx *ctx)
  12 {
  13         /*
  14          * Name (_PCT, Package (0x02)
  15          * {
  16          *      ResourceTemplate ()
  17          *      {
  18          *              Register (FFixedHW,
  19          *                      0x00,               // Bit Width
  20          *                      0x00,               // Bit Offset
  21          *                      0x0000000000000000, // Address
  22          *                      ,)
  23          *      },
  24          *
  25          *      ResourceTemplate ()
  26          *      {
  27          *              Register (FFixedHW,
  28          *                      0x00,               // Bit Width
  29          *                      0x00,               // Bit Offset
  30          *                      0x0000000000000000, // Address
  31          *                      ,)
  32          *      }
  33          * })
  34          */
  35         static char stream[] = {
  36                 /* 00000030    "0._PCT.," */
  37                 0x08, 0x5f, 0x50, 0x43, 0x54, 0x12, 0x2c,
  38                 /* 00000038    "........" */
  39                 0x02, 0x11, 0x14, 0x0a, 0x11, 0x82, 0x0c, 0x00,
  40                 /* 00000040    "........" */
  41                 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  42                 /* 00000048    "....y..." */
  43                 0x00, 0x00, 0x00, 0x00, 0x79, 0x00, 0x11, 0x14,
  44                 /* 00000050    "........" */
  45                 0x0a, 0x11, 0x82, 0x0c, 0x00, 0x7f, 0x00, 0x00,
  46                 /* 00000058    "........" */
  47                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  48                 0x00, 0x79, 0x00
  49         };
  50         acpigen_emit_stream(ctx, stream, ARRAY_SIZE(stream));
  51 }
  52
  53 void acpigen_write_empty_ptc(struct acpi_ctx *ctx)
  54 {
  55         /*
  56          * Name (_PTC, Package (0x02)
  57          * {
  58          *      ResourceTemplate ()
  59          *      {
  60          *              Register (FFixedHW,
  61          *                      0x00,               // Bit Width
  62          *                      0x00,               // Bit Offset
  63          *                      0x0000000000000000, // Address
  64          *                      ,)
  65          *      },
  66          *
  67          *      ResourceTemplate ()
  68          *      {
  69          *              Register (FFixedHW,
  70          *                      0x00,               // Bit Width
  71          *                      0x00,               // Bit Offset
  72          *                      0x0000000000000000, // Address
  73          *                      ,)
  74          *      }
  75          * })
  76          */
  77         struct acpi_gen_regaddr addr = {
  78                 .space_id    = ACPI_ADDRESS_SPACE_FIXED,
  79                 .bit_width   = 0,
  80                 .bit_offset  = 0,
  81                 .access_size = 0,
  82                 .addrl       = 0,
  83                 .addrh       = 0,
  84         };
  85
  86         acpigen_write_name(ctx, "_PTC");
  87         acpigen_write_package(ctx, 2);
  88
  89         /* ControlRegister */
  90         acpigen_write_register_resource(ctx, &addr);
  91
  92         /* StatusRegister */
  93         acpigen_write_register_resource(ctx, &addr);
  94
  95         acpigen_pop_len(ctx);
  96 }