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 ---
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" );