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acpi: Add a comment to set the acpi tables

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Sometimes a previous bootloader has written ACPI tables. It is useful to
be able to find and list these. Add an 'acpi set' command to set the
address for these tables.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass
2023-07-15 21:38:45 -06:00
committed by Bin Meng
parent 78f24d8f34
commit 297184143a
3 changed files with 86 additions and 5 deletions
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24
cmd/acpi.c
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@@ -118,6 +118,22 @@ static int do_acpi_list(struct cmd_tbl *cmdtp, int flag, int argc,
return 0;
}
static int do_acpi_set(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
ulong val;
if (argc < 2) {
printf("ACPI pointer: %lx\n", gd_acpi_start());
} else {
val = hextoul(argv[1], NULL);
printf("Setting ACPI pointer to %lx\n", val);
gd_set_acpi_start(val);
}
return 0;
}
static int do_acpi_items(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
@@ -157,12 +173,14 @@ static int do_acpi_dump(struct cmd_tbl *cmdtp, int flag, int argc,
#ifdef CONFIG_SYS_LONGHELP
static char acpi_help_text[] =
"list - list ACPI tables\n"
"acpi items [-d] - List/dump each piece of ACPI data from devices\n"
"acpi dump <name> - Dump ACPI table";
"list - list ACPI tables\n"
"acpi items [-d] - List/dump each piece of ACPI data from devices\n"
"acpi set [<addr>] - Set or show address of ACPI tables\n"
"acpi dump <name> - Dump ACPI table";
#endif
U_BOOT_CMD_WITH_SUBCMDS(acpi, "ACPI tables", acpi_help_text,
U_BOOT_SUBCMD_MKENT(list, 1, 1, do_acpi_list),
U_BOOT_SUBCMD_MKENT(items, 2, 1, do_acpi_items),
U_BOOT_SUBCMD_MKENT(set, 2, 1, do_acpi_set),
U_BOOT_SUBCMD_MKENT(dump, 2, 1, do_acpi_dump));