forked from luck/tmp_suning_uos_patched
856337283a
This fixes a regression for kernels after v3.2
After commit 72662e0108
ARM: head.S: only include __turn_mmu_on in the initial identity mapping
Zaurus PXA devices call sharpsl_save_param() during fixup and hang on
boot because memcpy refers to physical addresses no longer valid if the
MMU is setup.
Zaurus collie (SA1100) is unaffected (function is called in init_machine).
The code was making assumptions and for PXA the virtual address
should have been used before.
Signed-off-by: Marko Katic <dromede@gmail.com>
Signed-off-by: Andrea Adami <andrea.adami@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
/*
|
|
* Hardware parameter area specific to Sharp SL series devices
|
|
*
|
|
* Copyright (c) 2005 Richard Purdie
|
|
*
|
|
* Based on Sharp's 2.4 kernel patches
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/string.h>
|
|
#include <asm/mach/sharpsl_param.h>
|
|
#include <asm/memory.h>
|
|
|
|
/*
|
|
* Certain hardware parameters determined at the time of device manufacture,
|
|
* typically including LCD parameters are loaded by the bootloader at the
|
|
* address PARAM_BASE. As the kernel will overwrite them, we need to store
|
|
* them early in the boot process, then pass them to the appropriate drivers.
|
|
* Not all devices use all parameters but the format is common to all.
|
|
*/
|
|
#ifdef CONFIG_ARCH_SA1100
|
|
#define PARAM_BASE 0xe8ffc000
|
|
#define param_start(x) (void *)(x)
|
|
#else
|
|
#define PARAM_BASE 0xa0000a00
|
|
#define param_start(x) __va(x)
|
|
#endif
|
|
#define MAGIC_CHG(a,b,c,d) ( ( d << 24 ) | ( c << 16 ) | ( b << 8 ) | a )
|
|
|
|
#define COMADJ_MAGIC MAGIC_CHG('C','M','A','D')
|
|
#define UUID_MAGIC MAGIC_CHG('U','U','I','D')
|
|
#define TOUCH_MAGIC MAGIC_CHG('T','U','C','H')
|
|
#define AD_MAGIC MAGIC_CHG('B','V','A','D')
|
|
#define PHAD_MAGIC MAGIC_CHG('P','H','A','D')
|
|
|
|
struct sharpsl_param_info sharpsl_param;
|
|
EXPORT_SYMBOL(sharpsl_param);
|
|
|
|
void sharpsl_save_param(void)
|
|
{
|
|
memcpy(&sharpsl_param, param_start(PARAM_BASE), sizeof(struct sharpsl_param_info));
|
|
|
|
if (sharpsl_param.comadj_keyword != COMADJ_MAGIC)
|
|
sharpsl_param.comadj=-1;
|
|
|
|
if (sharpsl_param.phad_keyword != PHAD_MAGIC)
|
|
sharpsl_param.phadadj=-1;
|
|
|
|
if (sharpsl_param.uuid_keyword != UUID_MAGIC)
|
|
sharpsl_param.uuid[0]=-1;
|
|
|
|
if (sharpsl_param.touch_keyword != TOUCH_MAGIC)
|
|
sharpsl_param.touch_xp=-1;
|
|
|
|
if (sharpsl_param.adadj_keyword != AD_MAGIC)
|
|
sharpsl_param.adadj=-1;
|
|
}
|
|
|
|
|