This patch does probably too much, but it's hard (and very cumbersome/time consuming) to break it out. What is does is this: * each command has one short description, e.g. "list MUX configuration" * made sure the short descriptions start lowercase * each command has one usage. That string contains just the options, e.g. "[-npn]". It's not part of the long help text. * that is, it doesn't say "[OPTIONS]" anymore, every usable option is listed by character in this (short) option string (the long description is in the long help text, as before) * help texts have been reworked, to make them - sometimes smaller - sometimes describe the options better - more often present themselves in a nicer format * all long help texts are now created with BUSYBOX_CMD_HELP_ macros, no more 'static const __maybe_unused char cmd_foobar_help[]' * made sure the long help texts starts uppercase * because cmdtp->name and cmdtp->opts together provide the new usage, all "Usage: foobar" texts have been removed from the long help texts * BUSYBOX_CMD_HELP_TEXT() provides the trailing newline by itself, this is nicer in the source code * BUSYBOX_CMD_HELP_OPT() provides the trailing newline by itself * made sure no line gets longer than 77 characters * delibertely renamed cmdtp->usage, so that we can get compile-time errors (e.g. in out-of-tree modules that use register_command() * the 'help' command can now always emit the usage, even without compiled long help texts * 'help -v' gives a list of commands with their short description, this is similar like the old "help" command before my patchset * 'help -a' gives out help of all commands Signed-off-by: Holger Schurig <holgerschurig@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
218 lines
5.1 KiB
C
218 lines
5.1 KiB
C
/*
|
|
* cpuinfo.c - Show information about cp15 registers
|
|
*
|
|
* Copyright (c) 2009 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <complete.h>
|
|
|
|
#define CPU_ARCH_UNKNOWN 0
|
|
#define CPU_ARCH_ARMv3 1
|
|
#define CPU_ARCH_ARMv4 2
|
|
#define CPU_ARCH_ARMv4T 3
|
|
#define CPU_ARCH_ARMv5 4
|
|
#define CPU_ARCH_ARMv5T 5
|
|
#define CPU_ARCH_ARMv5TE 6
|
|
#define CPU_ARCH_ARMv5TEJ 7
|
|
#define CPU_ARCH_ARMv6 8
|
|
#define CPU_ARCH_ARMv7 9
|
|
|
|
#define ARM_CPU_PART_CORTEX_A5 0xC050
|
|
#define ARM_CPU_PART_CORTEX_A7 0xC070
|
|
#define ARM_CPU_PART_CORTEX_A8 0xC080
|
|
#define ARM_CPU_PART_CORTEX_A9 0xC090
|
|
#define ARM_CPU_PART_CORTEX_A15 0xC0F0
|
|
|
|
static void decode_cache(unsigned long size)
|
|
{
|
|
int linelen = 1 << ((size & 0x3) + 3);
|
|
int mult = 2 + ((size >> 2) & 1);
|
|
int cache_size = mult << (((size >> 6) & 0x7) + 8);
|
|
|
|
if (((size >> 2) & 0xf) == 1)
|
|
printf("no cache\n");
|
|
else
|
|
printf("%d bytes (linelen = %d)\n", cache_size, linelen);
|
|
}
|
|
|
|
static char *crbits[] = {"M", "A", "C", "W", "P", "D", "L", "B", "S", "R",
|
|
"F", "Z", "I", "V", "RR", "L4", "DT", "", "IT", "ST", "", "FI", "U", "XP",
|
|
"VE", "EE", "L2", "", "TRE", "AFE", "TE"};
|
|
|
|
static int do_cpuinfo(int argc, char *argv[])
|
|
{
|
|
unsigned long mainid, cache, cr;
|
|
char *architecture, *implementer;
|
|
int i;
|
|
int cpu_arch;
|
|
|
|
__asm__ __volatile__(
|
|
"mrc p15, 0, %0, c0, c0, 0 @ read control reg\n"
|
|
: "=r" (mainid)
|
|
:
|
|
: "memory");
|
|
|
|
__asm__ __volatile__(
|
|
"mrc p15, 0, %0, c0, c0, 1 @ read control reg\n"
|
|
: "=r" (cache)
|
|
:
|
|
: "memory");
|
|
|
|
__asm__ __volatile__(
|
|
"mrc p15, 0, %0, c1, c0, 0 @ read control reg\n"
|
|
: "=r" (cr)
|
|
:
|
|
: "memory");
|
|
|
|
switch (mainid >> 24) {
|
|
case 0x41:
|
|
implementer = "ARM";
|
|
break;
|
|
case 0x44:
|
|
implementer = "Digital Equipment Corp.";
|
|
break;
|
|
case 0x40:
|
|
implementer = "Motorola - Freescale Semiconductor Inc.";
|
|
break;
|
|
case 0x56:
|
|
implementer = "Marvell Semiconductor Inc.";
|
|
break;
|
|
case 0x69:
|
|
implementer = "Intel Corp.";
|
|
break;
|
|
default:
|
|
implementer = "Unknown";
|
|
}
|
|
|
|
if ((mainid & 0x0008f000) == 0) {
|
|
cpu_arch = CPU_ARCH_UNKNOWN;
|
|
} else if ((mainid & 0x0008f000) == 0x00007000) {
|
|
cpu_arch = (mainid & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3;
|
|
} else if ((mainid & 0x00080000) == 0x00000000) {
|
|
cpu_arch = (mainid >> 16) & 7;
|
|
if (cpu_arch)
|
|
cpu_arch += CPU_ARCH_ARMv3;
|
|
} else if ((mainid & 0x000f0000) == 0x000f0000) {
|
|
unsigned int mmfr0;
|
|
|
|
/* Revised CPUID format. Read the Memory Model Feature
|
|
* Register 0 and check for VMSAv7 or PMSAv7 */
|
|
asm("mrc p15, 0, %0, c0, c1, 4"
|
|
: "=r" (mmfr0));
|
|
if ((mmfr0 & 0x0000000f) >= 0x00000003 ||
|
|
(mmfr0 & 0x000000f0) >= 0x00000030)
|
|
cpu_arch = CPU_ARCH_ARMv7;
|
|
else if ((mmfr0 & 0x0000000f) == 0x00000002 ||
|
|
(mmfr0 & 0x000000f0) == 0x00000020)
|
|
cpu_arch = CPU_ARCH_ARMv6;
|
|
else
|
|
cpu_arch = CPU_ARCH_UNKNOWN;
|
|
} else
|
|
cpu_arch = CPU_ARCH_UNKNOWN;
|
|
|
|
switch (cpu_arch) {
|
|
case CPU_ARCH_ARMv3:
|
|
architecture = "v3";
|
|
break;
|
|
case CPU_ARCH_ARMv4:
|
|
architecture = "v4";
|
|
break;
|
|
case CPU_ARCH_ARMv4T:
|
|
architecture = "v4T";
|
|
break;
|
|
case CPU_ARCH_ARMv5:
|
|
architecture = "v5";
|
|
break;
|
|
case CPU_ARCH_ARMv5T:
|
|
architecture = "v5T";
|
|
break;
|
|
case CPU_ARCH_ARMv5TE:
|
|
architecture = "v5TE";
|
|
break;
|
|
case CPU_ARCH_ARMv5TEJ:
|
|
architecture = "v5TEJ";
|
|
break;
|
|
case CPU_ARCH_ARMv6:
|
|
architecture = "v6";
|
|
break;
|
|
case CPU_ARCH_ARMv7:
|
|
architecture = "v7";
|
|
break;
|
|
case CPU_ARCH_UNKNOWN:
|
|
default:
|
|
architecture = "Unknown";
|
|
}
|
|
|
|
printf("implementer: %s\narchitecture: %s\n",
|
|
implementer, architecture);
|
|
|
|
if (cpu_arch == CPU_ARCH_ARMv7) {
|
|
unsigned int major, minor;
|
|
char *part;
|
|
major = (mainid >> 20) & 0xf;
|
|
minor = mainid & 0xf;
|
|
switch (mainid & 0xfff0) {
|
|
case ARM_CPU_PART_CORTEX_A5:
|
|
part = "Cortex-A5";
|
|
break;
|
|
case ARM_CPU_PART_CORTEX_A7:
|
|
part = "Cortex-A7";
|
|
break;
|
|
case ARM_CPU_PART_CORTEX_A8:
|
|
part = "Cortex-A8";
|
|
break;
|
|
case ARM_CPU_PART_CORTEX_A9:
|
|
part = "Cortex-A9";
|
|
break;
|
|
case ARM_CPU_PART_CORTEX_A15:
|
|
part = "Cortex-A15";
|
|
break;
|
|
default:
|
|
part = "unknown";
|
|
}
|
|
printf("core: %s r%up%u\n", part, major, minor);
|
|
}
|
|
|
|
if (cache & (1 << 24)) {
|
|
/* separate I/D cache */
|
|
printf("I-cache: ");
|
|
decode_cache(cache & 0xfff);
|
|
printf("D-cache: ");
|
|
decode_cache((cache >> 12) & 0xfff);
|
|
} else {
|
|
/* unified I/D cache */
|
|
printf("cache: ");
|
|
decode_cache(cache & 0xfff);
|
|
}
|
|
|
|
printf("Control register: ");
|
|
for (i = 0; i < ARRAY_SIZE(crbits); i++)
|
|
if (cr & (1 << i))
|
|
printf("%s ", crbits[i]);
|
|
printf("\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
BAREBOX_CMD_START(cpuinfo)
|
|
.cmd = do_cpuinfo,
|
|
BAREBOX_CMD_DESC("show info about CPU")
|
|
BAREBOX_CMD_GROUP(CMD_GRP_INFO)
|
|
BAREBOX_CMD_COMPLETE(empty_complete)
|
|
BAREBOX_CMD_END
|
|
|