Add a -c option to mtrr to allow any CPU to be updated with this command.
Signed-off-by: Simon Glass <s...@chromium.org>
Reviewed-by: Wolfgang Wallner <wolfgang.wall...@br-automation.com>
Reviewed-by: Bin Meng <bmeng...@gmail.com>
---
Changes in v3:
- Mention that the CPU number is in hex
cmd/x86/mtrr.c | 18 ++++++++++++++++--
1 file changed, 16 insertions(+), 2 deletions(-)
diff --git a/cmd/x86/mtrr.c b/cmd/x86/mtrr.c
index b51b1cd7e2..d8a7e56d5a 100644
--- a/cmd/x86/mtrr.c
+++ b/cmd/x86/mtrr.c
@@ -104,6 +104,17 @@ static int do_mtrr(struct cmd_tbl *cmdtp, int flag, int
argc,
int ret;
cpu_select = MP_SELECT_BSP;
+ if (argc >= 3 && !strcmp("-c", argv[1])) {
+ const char *cpustr;
+
+ cpustr = argv[2];
+ if (*cpustr == 'a')
+ cpu_select = MP_SELECT_ALL;
+ else
+ cpu_select = simple_strtol(cpustr, NULL, 16);
+ argc -= 2;
+ argv += 2;
+ }
argc--;
argv++;
cmd = argv[0] ? *argv[0] : 0;
@@ -145,11 +156,14 @@ static int do_mtrr(struct cmd_tbl *cmdtp, int flag, int
argc,
}
U_BOOT_CMD(
- mtrr, 6, 1, do_mtrr,
+ mtrr, 8, 1, do_mtrr,
"Use x86 memory type range registers (32-bit only)",
"[list] - list current registers\n"
"set <reg> <type> <start> <size> - set a register\n"
"\t<type> is Uncacheable, Combine, Through, Protect, Back\n"
"disable <reg> - disable a register\n"
- "enable <reg> - enable a register"
+ "enable <reg> - enable a register\n"
+ "\n"
+ "Precede command with '-c <n>|all' to access a particular hex CPU,
e.g.\n"
+ " mtrr -c all list; mtrr -c 2e list"
);
--
2.27.0.212.ge8ba1cc988-goog
