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// SPDX-License-Identifier: GPL-2.0+
/*
* The 'cpuid' command provides access to the CPU's cpuid information
*
* Copyright 2024 Google, LLC
* Written by Simon Glass <sjg@chromium.org>
*/
#include <command.h>
#include <vsprintf.h>
#include <asm/msr.h>
static int do_read(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct msr_t msr;
ulong op;
if (argc < 2)
return CMD_RET_USAGE;
op = hextoul(argv[1], NULL);
msr = msr_read(op);
printf("%08x %08x\n", msr.hi, msr.lo);
return 0;
}
static int do_write(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct msr_t msr;
ulong op;
if (argc < 4)
return CMD_RET_USAGE;
op = hextoul(argv[1], NULL);
msr.hi = hextoul(argv[2], NULL);
msr.lo = hextoul(argv[3], NULL);
msr_write(op, msr);
return 0;
}
U_BOOT_LONGHELP(msr,
"read <op> - read a machine-status register (MSR) as <hi 32-bits> <lo 32-bits>\n"
"write <op< <hi> <lo> - write an MSR");
U_BOOT_CMD_WITH_SUBCMDS(msr, "Machine Status Registers", msr_help_text,
U_BOOT_CMD_MKENT(read, CONFIG_SYS_MAXARGS, 1, do_read, "", ""),
U_BOOT_CMD_MKENT(write, CONFIG_SYS_MAXARGS, 1, do_write, "", ""));
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