diff options
| author | Simon Glass | 2020-07-17 08:48:29 -0600 |
|---|---|---|
| committer | Bin Meng | 2020-07-20 09:46:48 +0800 |
| commit | f91f5ab6f0fe2c33b2dd9aa078a87c09eb792a4c (patch) | |
| tree | 9323ff737b537d14a58b65070bba4af94cb8fa78 | |
| parent | b2a76b3fe75a24eb4dafe32eebd8a3c98ad18354 (diff) | |
x86: mtrr: Update 'mtrr' to allow setting MTRRs on any CPU
Add a -c option to mtrr to allow any CPU to be updated with this command.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
| -rw-r--r-- | cmd/x86/mtrr.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/cmd/x86/mtrr.c b/cmd/x86/mtrr.c index b51b1cd7e2a..d8a7e56d5a4 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" ); |