1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright 2019 Google LLC
4 * Written by Simon Glass <sjg@chromium.org>
5 */
6#include <common.h>
7#include <command.h>
8#include <display_options.h>
9#include <log.h>
10#include <mapmem.h>
11#include <acpi/acpi_table.h>
12#include <asm/acpi_table.h>
13#include <asm/global_data.h>
14#include <dm/acpi.h>
15
16DECLARE_GLOBAL_DATA_PTR;
17
18/**
19 * dump_hdr() - Dump an ACPI header
20 *
21 * Except for the Firmware ACPI Control Structure (FACS)
22 * additionally show the revision information.
23 *
24 * @hdr: ACPI header to dump
25 */
26static void dump_hdr(struct acpi_table_header *hdr)
27{
28	bool has_hdr = memcmp(hdr->signature, "FACS", ACPI_NAME_LEN);
29
30	printf("%.*s  %16lx  %5x", ACPI_NAME_LEN, hdr->signature,
31	       (ulong)map_to_sysmem(hdr), hdr->length);
32	if (has_hdr) {
33		printf("  v%02d %.6s %.8s %x %.4s %x\n", hdr->revision,
34		       hdr->oem_id, hdr->oem_table_id, hdr->oem_revision,
35		       hdr->creator_id, hdr->creator_revision);
36	} else {
37		printf("\n");
38	}
39}
40
41static int dump_table_name(const char *sig)
42{
43	struct acpi_table_header *hdr;
44
45	hdr = acpi_find_table(sig);
46	if (!hdr)
47		return -ENOENT;
48	printf("%.*s @ %16lx\n", ACPI_NAME_LEN, hdr->signature,
49	       (ulong)nomap_to_sysmem(hdr));
50	print_buffer(0, hdr, 1, hdr->length, 0);
51
52	return 0;
53}
54
55static void list_fadt(struct acpi_fadt *fadt)
56{
57	if (fadt->header.revision >= 3 && fadt->x_dsdt)
58		dump_hdr(nomap_sysmem(fadt->x_dsdt, 0));
59	else if (fadt->dsdt)
60		dump_hdr(nomap_sysmem(fadt->dsdt, 0));
61	if (!IS_ENABLED(CONFIG_X86) &&
62	    !(fadt->flags & ACPI_FADT_HW_REDUCED_ACPI))
63		log_err("FADT not ACPI-hardware-reduced-compliant\n");
64	if (fadt->header.revision >= 3 && fadt->x_firmware_ctrl)
65		dump_hdr(nomap_sysmem(fadt->x_firmware_ctrl, 0));
66	else if (fadt->firmware_ctrl)
67		dump_hdr(nomap_sysmem(fadt->firmware_ctrl, 0));
68}
69
70static void list_rsdt(struct acpi_rsdp *rsdp)
71{
72	int len, i, count;
73	struct acpi_rsdt *rsdt;
74	struct acpi_xsdt *xsdt;
75
76	if (rsdp->rsdt_address) {
77		rsdt = nomap_sysmem(rsdp->rsdt_address, 0);
78		dump_hdr(&rsdt->header);
79	}
80	if (rsdp->xsdt_address) {
81		xsdt = nomap_sysmem(rsdp->xsdt_address, 0);
82		dump_hdr(&xsdt->header);
83		len = xsdt->header.length - sizeof(xsdt->header);
84		count = len / sizeof(u64);
85	} else if (rsdp->rsdt_address) {
86		len = rsdt->header.length - sizeof(rsdt->header);
87		count = len / sizeof(u32);
88	} else {
89		return;
90	}
91
92	for (i = 0; i < count; i++) {
93		struct acpi_table_header *hdr;
94		u64 entry;
95
96		if (rsdp->xsdt_address)
97			entry = xsdt->entry[i];
98		else
99			entry = rsdt->entry[i];
100		if (!entry)
101			break;
102		hdr = nomap_sysmem(entry, 0);
103		dump_hdr(hdr);
104		if (!memcmp(hdr->signature, "FACP", ACPI_NAME_LEN))
105			list_fadt((struct acpi_fadt *)hdr);
106	}
107}
108
109static void list_rsdp(struct acpi_rsdp *rsdp)
110{
111	printf("RSDP  %16lx  %5x  v%02d %.6s\n", (ulong)map_to_sysmem(rsdp),
112	       rsdp->length, rsdp->revision, rsdp->oem_id);
113	list_rsdt(rsdp);
114}
115
116static int do_acpi_list(struct cmd_tbl *cmdtp, int flag, int argc,
117			char *const argv[])
118{
119	struct acpi_rsdp *rsdp;
120
121	rsdp = map_sysmem(gd_acpi_start(), 0);
122	if (!rsdp) {
123		printf("No ACPI tables present\n");
124		return 0;
125	}
126	printf("Name              Base   Size  Detail\n"
127	       "----  ----------------  -----  ----------------------------\n");
128	list_rsdp(rsdp);
129
130	return 0;
131}
132
133static int do_acpi_set(struct cmd_tbl *cmdtp, int flag, int argc,
134		       char *const argv[])
135{
136	ulong val;
137
138	if (argc < 2) {
139		printf("ACPI pointer: %lx\n", gd_acpi_start());
140	} else {
141		val = hextoul(argv[1], NULL);
142		printf("Setting ACPI pointer to %lx\n", val);
143		gd_set_acpi_start(val);
144	}
145
146	return 0;
147}
148
149static int do_acpi_items(struct cmd_tbl *cmdtp, int flag, int argc,
150			 char *const argv[])
151{
152	bool dump_contents;
153
154	dump_contents = argc >= 2 && !strcmp("-d", argv[1]);
155	if (!IS_ENABLED(CONFIG_ACPIGEN)) {
156		printf("Not supported (enable ACPIGEN)\n");
157		return CMD_RET_FAILURE;
158	}
159	acpi_dump_items(dump_contents ? ACPI_DUMP_CONTENTS : ACPI_DUMP_LIST);
160
161	return 0;
162}
163
164static int do_acpi_dump(struct cmd_tbl *cmdtp, int flag, int argc,
165			char *const argv[])
166{
167	const char *name;
168	char sig[ACPI_NAME_LEN];
169	int ret;
170
171	if (argc < 2)
172		return CMD_RET_USAGE;
173
174	name = argv[1];
175	if (strlen(name) != ACPI_NAME_LEN) {
176		printf("Table name '%s' must be four characters\n", name);
177		return CMD_RET_FAILURE;
178	}
179	str_to_upper(name, sig, ACPI_NAME_LEN);
180	ret = dump_table_name(sig);
181	if (ret) {
182		printf("Table '%.*s' not found\n", ACPI_NAME_LEN, sig);
183		return CMD_RET_FAILURE;
184	}
185
186	return 0;
187}
188
189U_BOOT_LONGHELP(acpi,
190	"list  - list ACPI tables\n"
191	"acpi items [-d]   - List/dump each piece of ACPI data from devices\n"
192	"acpi set [<addr>] - Set or show address of ACPI tables\n"
193	"acpi dump <name>  - Dump ACPI table");
194
195U_BOOT_CMD_WITH_SUBCMDS(acpi, "ACPI tables", acpi_help_text,
196	U_BOOT_SUBCMD_MKENT(list, 1, 1, do_acpi_list),
197	U_BOOT_SUBCMD_MKENT(items, 2, 1, do_acpi_items),
198	U_BOOT_SUBCMD_MKENT(set, 2, 1, do_acpi_set),
199	U_BOOT_SUBCMD_MKENT(dump, 2, 1, do_acpi_dump));
200