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// SPDX-License-Identifier: GPL-2.0-only
// SPDX-FileCopyrightText: 2012 Jan Luebbe <j.luebbe@pengutronix.de>, Pengutronix
/*
* mmuinfo_32.c - Show MMU/cache information from cp15 registers
*/
#include <common.h>
#include <asm/mmuinfo.h>
static char *inner_attr[] = {
"0b000 Non-cacheable",
"0b001 Strongly-ordered",
"0b010 (reserved)",
"0b011 Device",
"0b100 (reserved)",
"0b101 Write-Back, Write-Allocate",
"0b110 Write-Through",
"0b111 Write-Back, no Write-Allocate",
};
static char *outer_attr[] = {
"0b00 Non-cacheable",
"0b01 Write-Back, Write-Allocate",
"0b10 Write-Through, no Write-Allocate",
"0b11 Write-Back, no Write-Allocate",
};
static void decode_par(unsigned long par)
{
printf(" Physical Address [31:12]: 0x%08lx\n", par & 0xFFFFF000);
printf(" Reserved [11]: 0x%lx\n", (par >> 11) & 0x1);
printf(" Not Outer Shareable [10]: 0x%lx\n", (par >> 10) & 0x1);
printf(" Non-Secure [9]: 0x%lx\n", (par >> 9) & 0x1);
printf(" Impl. def. [8]: 0x%lx\n", (par >> 8) & 0x1);
printf(" Shareable [7]: 0x%lx\n", (par >> 7) & 0x1);
printf(" Inner mem. attr. [6:4]: 0x%lx (%s)\n", (par >> 4) & 0x7,
inner_attr[(par >> 4) & 0x7]);
printf(" Outer mem. attr. [3:2]: 0x%lx (%s)\n", (par >> 2) & 0x3,
outer_attr[(par >> 2) & 0x3]);
printf(" SuperSection [1]: 0x%lx\n", (par >> 1) & 0x1);
printf(" Failure [0]: 0x%lx\n", (par >> 0) & 0x1);
}
int mmuinfo_v7(void *_addr)
{
unsigned long addr = (unsigned long)_addr;
unsigned long priv_read, priv_write;
__asm__ __volatile__(
"mcr p15, 0, %0, c7, c8, 0 @ write VA to PA translation (priv read)\n"
:
: "r" (addr)
: "memory");
__asm__ __volatile__(
"mrc p15, 0, %0, c7, c4, 0 @ read PAR\n"
: "=r" (priv_read)
:
: "memory");
__asm__ __volatile__(
"mcr p15, 0, %0, c7, c8, 1 @ write VA to PA translation (priv write)\n"
:
: "r" (addr)
: "memory");
__asm__ __volatile__(
"mrc p15, 0, %0, c7, c4, 0 @ read PAR\n"
: "=r" (priv_write)
:
: "memory");
printf("PAR result for 0x%08lx: \n", addr);
printf(" privileged read: 0x%08lx\n", priv_read);
decode_par(priv_read);
printf(" privileged write: 0x%08lx\n", priv_write);
decode_par(priv_write);
return 0;
}
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