mirror of
https://github.com/smaeul/u-boot.git
synced 2025-11-04 05:50:17 +00:00
133 lines
2.8 KiB
C
133 lines
2.8 KiB
C
/*
|
|
* PXA CPU information display
|
|
*
|
|
* Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include <errno.h>
|
|
#include <linux/compiler.h>
|
|
|
|
#define CPU_MASK_PXA_REVID 0x00f
|
|
|
|
#define CPU_MASK_PXA_PRODID 0x3f0
|
|
#define CPU_VALUE_PXA25X 0x100
|
|
#define CPU_VALUE_PXA27X 0x110
|
|
|
|
static uint32_t pxa_get_cpuid(void)
|
|
{
|
|
uint32_t cpuid;
|
|
asm volatile("mrc p15, 0, %0, c0, c0, 0" : "=r"(cpuid));
|
|
return cpuid;
|
|
}
|
|
|
|
int cpu_is_pxa25x(void)
|
|
{
|
|
uint32_t id = pxa_get_cpuid();
|
|
id &= CPU_MASK_PXA_PRODID;
|
|
return id == CPU_VALUE_PXA25X;
|
|
}
|
|
|
|
int cpu_is_pxa27x(void)
|
|
{
|
|
uint32_t id = pxa_get_cpuid();
|
|
id &= CPU_MASK_PXA_PRODID;
|
|
return id == CPU_VALUE_PXA27X;
|
|
}
|
|
|
|
#ifdef CONFIG_DISPLAY_CPUINFO
|
|
static const char *pxa25x_get_revision(void)
|
|
{
|
|
static __maybe_unused const char * const revs_25x[] = { "A0" };
|
|
static __maybe_unused const char * const revs_26x[] = {
|
|
"A0", "B0", "B1"
|
|
};
|
|
static const char *unknown = "Unknown";
|
|
uint32_t id;
|
|
|
|
if (!cpu_is_pxa25x())
|
|
return unknown;
|
|
|
|
id = pxa_get_cpuid() & CPU_MASK_PXA_REVID;
|
|
|
|
/* PXA26x is a sick special case as it can't be told apart from PXA25x :-( */
|
|
#ifdef CONFIG_CPU_PXA26X
|
|
switch (id) {
|
|
case 3: return revs_26x[0];
|
|
case 5: return revs_26x[1];
|
|
case 6: return revs_26x[2];
|
|
}
|
|
#else
|
|
if (id == 6)
|
|
return revs_25x[0];
|
|
#endif
|
|
return unknown;
|
|
}
|
|
|
|
static const char *pxa27x_get_revision(void)
|
|
{
|
|
static const char *const rev[] = { "A0", "A1", "B0", "B1", "C0", "C5" };
|
|
static const char *unknown = "Unknown";
|
|
uint32_t id;
|
|
|
|
if (!cpu_is_pxa27x())
|
|
return unknown;
|
|
|
|
id = pxa_get_cpuid() & CPU_MASK_PXA_REVID;
|
|
|
|
if ((id == 5) || (id == 6) || (id > 7))
|
|
return unknown;
|
|
|
|
/* Cap the special PXA270 C5 case. */
|
|
if (id == 7)
|
|
id = 5;
|
|
|
|
return rev[id];
|
|
}
|
|
|
|
static int print_cpuinfo_pxa2xx(void)
|
|
{
|
|
if (cpu_is_pxa25x()) {
|
|
puts("Marvell PXA25x rev. ");
|
|
puts(pxa25x_get_revision());
|
|
} else if (cpu_is_pxa27x()) {
|
|
puts("Marvell PXA27x rev. ");
|
|
puts(pxa27x_get_revision());
|
|
} else
|
|
return -EINVAL;
|
|
|
|
puts("\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
int print_cpuinfo(void)
|
|
{
|
|
int ret;
|
|
|
|
puts("CPU: ");
|
|
|
|
ret = print_cpuinfo_pxa2xx();
|
|
if (!ret)
|
|
return ret;
|
|
|
|
return ret;
|
|
}
|
|
#endif
|