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
acpigen_write_empty_pct(struct acpi_ctx * ctx)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
acpigen_write_empty_ptc(struct acpi_ctx * ctx)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 }
97