mirror of
https://github.com/nxp-imx/linux-imx.git
synced 2026-04-21 07:30:16 +02:00
ca6a4563d4
commit 027bc8b082 upstream.
On some ARMs the memory can be mapped pgprot_noncached() and still
be working for atomic operations. As pointed out by Colin Cross
<ccross@android.com>, in some cases you do want to use
pgprot_noncached() if the SoC supports it to see a debug printk
just before a write hanging the system.
On ARMs, the atomic operations on strongly ordered memory are
implementation defined. So let's provide an optional kernel parameter
for configuring pgprot_noncached(), and use pgprot_writecombine() by
default.
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Rob Herring <robherring2@gmail.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Anton Vorontsov <anton@enomsg.org>
Cc: Colin Cross <ccross@android.com>
Cc: Olof Johansson <olof@lixom.net>
Cc: Russell King <linux@arm.linux.org.uk>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
/*
|
|
* Copyright (C) 2010 Marco Stornelli <marco.stornelli@gmail.com>
|
|
* Copyright (C) 2011 Kees Cook <keescook@chromium.org>
|
|
* Copyright (C) 2011 Google, Inc.
|
|
*
|
|
* This software is licensed under the terms of the GNU General Public
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
* may be copied, distributed, and modified under those terms.
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
#ifndef __LINUX_PSTORE_RAM_H__
|
|
#define __LINUX_PSTORE_RAM_H__
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/list.h>
|
|
#include <linux/types.h>
|
|
#include <linux/init.h>
|
|
|
|
struct persistent_ram_buffer;
|
|
struct rs_control;
|
|
|
|
struct persistent_ram_ecc_info {
|
|
int block_size;
|
|
int ecc_size;
|
|
int symsize;
|
|
int poly;
|
|
};
|
|
|
|
struct persistent_ram_zone {
|
|
phys_addr_t paddr;
|
|
size_t size;
|
|
void *vaddr;
|
|
struct persistent_ram_buffer *buffer;
|
|
size_t buffer_size;
|
|
|
|
/* ECC correction */
|
|
char *par_buffer;
|
|
char *par_header;
|
|
struct rs_control *rs_decoder;
|
|
int corrected_bytes;
|
|
int bad_blocks;
|
|
struct persistent_ram_ecc_info ecc_info;
|
|
|
|
char *old_log;
|
|
size_t old_log_size;
|
|
};
|
|
|
|
struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size,
|
|
u32 sig, struct persistent_ram_ecc_info *ecc_info,
|
|
unsigned int memtype);
|
|
void persistent_ram_free(struct persistent_ram_zone *prz);
|
|
void persistent_ram_zap(struct persistent_ram_zone *prz);
|
|
|
|
int persistent_ram_write(struct persistent_ram_zone *prz, const void *s,
|
|
unsigned int count);
|
|
|
|
void persistent_ram_save_old(struct persistent_ram_zone *prz);
|
|
size_t persistent_ram_old_size(struct persistent_ram_zone *prz);
|
|
void *persistent_ram_old(struct persistent_ram_zone *prz);
|
|
void persistent_ram_free_old(struct persistent_ram_zone *prz);
|
|
ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz,
|
|
char *str, size_t len);
|
|
|
|
/*
|
|
* Ramoops platform data
|
|
* @mem_size memory size for ramoops
|
|
* @mem_address physical memory address to contain ramoops
|
|
*/
|
|
|
|
struct ramoops_platform_data {
|
|
unsigned long mem_size;
|
|
unsigned long mem_address;
|
|
unsigned int mem_type;
|
|
unsigned long record_size;
|
|
unsigned long console_size;
|
|
unsigned long ftrace_size;
|
|
int dump_oops;
|
|
struct persistent_ram_ecc_info ecc_info;
|
|
};
|
|
|
|
#endif
|