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 <mapmem.h>
10 #include <acpi/acpi_table.h>
11 #include <asm/acpi_table.h>
12 #include <asm/global_data.h>
13 #include <dm/acpi.h>
14
15 DECLARE_GLOBAL_DATA_PTR;
16
17 /**
18 * dump_hdr() - Dump an ACPI header
19 *
20 * If the header is for FACS then it shows the revision information as well
21 *
22 * @hdr: ACPI header to dump
23 */
dump_hdr(struct acpi_table_header * hdr)24 static void dump_hdr(struct acpi_table_header *hdr)
25 {
26 bool has_hdr = memcmp(hdr->signature, "FACS", ACPI_NAME_LEN);
27
28 printf("%.*s %08lx %5x", ACPI_NAME_LEN, hdr->signature,
29 (ulong)map_to_sysmem(hdr), hdr->length);
30 if (has_hdr) {
31 printf(" v%02d %.6s %.8s %x %.4s %x\n", hdr->revision,
32 hdr->oem_id, hdr->oem_table_id, hdr->oem_revision,
33 hdr->aslc_id, hdr->aslc_revision);
34 } else {
35 printf("\n");
36 }
37 }
38
dump_table_name(const char * sig)39 static int dump_table_name(const char *sig)
40 {
41 struct acpi_table_header *hdr;
42
43 hdr = acpi_find_table(sig);
44 if (!hdr)
45 return -ENOENT;
46 printf("%.*s @ %08lx\n", ACPI_NAME_LEN, hdr->signature,
47 (ulong)map_to_sysmem(hdr));
48 print_buffer(0, hdr, 1, hdr->length, 0);
49
50 return 0;
51 }
52
list_fadt(struct acpi_fadt * fadt)53 static void list_fadt(struct acpi_fadt *fadt)
54 {
55 if (fadt->dsdt)
56 dump_hdr(map_sysmem(fadt->dsdt, 0));
57 if (fadt->firmware_ctrl)
58 dump_hdr(map_sysmem(fadt->firmware_ctrl, 0));
59 }
60
list_rsdt(struct acpi_rsdt * rsdt,struct acpi_xsdt * xsdt)61 static int list_rsdt(struct acpi_rsdt *rsdt, struct acpi_xsdt *xsdt)
62 {
63 int len, i, count;
64
65 dump_hdr(&rsdt->header);
66 if (xsdt)
67 dump_hdr(&xsdt->header);
68 len = rsdt->header.length - sizeof(rsdt->header);
69 count = len / sizeof(u32);
70 for (i = 0; i < count; i++) {
71 struct acpi_table_header *hdr;
72
73 if (!rsdt->entry[i])
74 break;
75 hdr = map_sysmem(rsdt->entry[i], 0);
76 dump_hdr(hdr);
77 if (!memcmp(hdr->signature, "FACP", ACPI_NAME_LEN))
78 list_fadt((struct acpi_fadt *)hdr);
79 if (xsdt) {
80 if (xsdt->entry[i] != rsdt->entry[i]) {
81 printf(" (xsdt mismatch %llx)\n",
82 xsdt->entry[i]);
83 }
84 }
85 }
86
87 return 0;
88 }
89
list_rsdp(struct acpi_rsdp * rsdp)90 static int list_rsdp(struct acpi_rsdp *rsdp)
91 {
92 struct acpi_rsdt *rsdt;
93 struct acpi_xsdt *xsdt;
94
95 printf("RSDP %08lx %5x v%02d %.6s\n", (ulong)map_to_sysmem(rsdp),
96 rsdp->length, rsdp->revision, rsdp->oem_id);
97 rsdt = map_sysmem(rsdp->rsdt_address, 0);
98 xsdt = map_sysmem(rsdp->xsdt_address, 0);
99 list_rsdt(rsdt, xsdt);
100
101 return 0;
102 }
103
do_acpi_list(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])104 static int do_acpi_list(struct cmd_tbl *cmdtp, int flag, int argc,
105 char *const argv[])
106 {
107 struct acpi_rsdp *rsdp;
108
109 rsdp = map_sysmem(gd_acpi_start(), 0);
110 if (!rsdp) {
111 printf("No ACPI tables present\n");
112 return 0;
113 }
114 printf("Name Base Size Detail\n");
115 printf("---- -------- ----- ------\n");
116 list_rsdp(rsdp);
117
118 return 0;
119 }
120
do_acpi_items(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])121 static int do_acpi_items(struct cmd_tbl *cmdtp, int flag, int argc,
122 char *const argv[])
123 {
124 bool dump_contents;
125
126 dump_contents = argc >= 2 && !strcmp("-d", argv[1]);
127 if (!IS_ENABLED(CONFIG_ACPIGEN)) {
128 printf("Not supported (enable ACPIGEN)\n");
129 return CMD_RET_FAILURE;
130 }
131 acpi_dump_items(dump_contents ? ACPI_DUMP_CONTENTS : ACPI_DUMP_LIST);
132
133 return 0;
134 }
135
do_acpi_dump(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])136 static int do_acpi_dump(struct cmd_tbl *cmdtp, int flag, int argc,
137 char *const argv[])
138 {
139 const char *name;
140 char sig[ACPI_NAME_LEN];
141 int ret;
142
143 name = argv[1];
144 if (strlen(name) != ACPI_NAME_LEN) {
145 printf("Table name '%s' must be four characters\n", name);
146 return CMD_RET_FAILURE;
147 }
148 str_to_upper(name, sig, ACPI_NAME_LEN);
149 ret = dump_table_name(sig);
150 if (ret) {
151 printf("Table '%.*s' not found\n", ACPI_NAME_LEN, sig);
152 return CMD_RET_FAILURE;
153 }
154
155 return 0;
156 }
157
158 #ifdef CONFIG_SYS_LONGHELP
159 static char acpi_help_text[] =
160 "list - list ACPI tables\n"
161 "acpi items [-d] - List/dump each piece of ACPI data from devices\n"
162 "acpi dump <name> - Dump ACPI table";
163 #endif
164
165 U_BOOT_CMD_WITH_SUBCMDS(acpi, "ACPI tables", acpi_help_text,
166 U_BOOT_SUBCMD_MKENT(list, 1, 1, do_acpi_list),
167 U_BOOT_SUBCMD_MKENT(items, 2, 1, do_acpi_items),
168 U_BOOT_SUBCMD_MKENT(dump, 2, 1, do_acpi_dump));
169