From patchwork Fri May 22 02:23:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Glass X-Patchwork-Id: 246213 List-Id: U-Boot discussion From: sjg at chromium.org (Simon Glass) Date: Thu, 21 May 2020 20:23:25 -0600 Subject: [PATCH 21/22] x86: mtrr: Update 'mtrr' to allow setting MTRRs on any CPU In-Reply-To: <20200522022326.238388-1-sjg@chromium.org> References: <20200522022326.238388-1-sjg@chromium.org> Message-ID: <20200521202309.21.I199f5031b9836f1ee1f787dd683739a6904eb54e@changeid> Add a -c option to mtrr to allow any CPU to be updated with this command. Signed-off-by: Simon Glass --- 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 fea7a437db8..8365a7978ff 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 - set a register\n" "\t is Uncacheable, Combine, Through, Protect, Back\n" "disable - disable a register\n" - "enable - enable a register" + "enable - enable a register\n" + "\n" + "Precede command with '-c |all' to access a particular CPU, e.g.\n" + " mtrr -c all list; mtrr -c 2e list" );