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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>
This commit is contained in:
Simon Glass 2020-07-17 08:48:29 -06:00 committed by Bin Meng
parent b2a76b3fe7
commit f91f5ab6f0
1 changed files with 16 additions and 2 deletions
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18
cmd/x86/mtrr.c
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@ -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"
);