Merge "msm: 8x55: put reason for boot in procfs from SMEM"

Introduction

=============

The power management integrated circuit (PMIC) records the reason the

Application processor was powered on in Shared Memory.

The hardware and software used is the shared memory interface. This document

is not for the purpose of describing this interface, but to identify the

possible values for this data item.

Description

===========

Shared memory item (SMEM_POWER_ON_STATUS_INFO) is read to get access to

this data. The table below identifies the possible values stored.

power_on_status values set by the PMIC for power on event:

----------------------------------------------------------

0x01 -- keyboard power on

0x02 -- RTC alarm

0x04 -- cable power on

0x08 -- SMPL

0x10 -- Watch Dog timeout

0x20 -- USB charger

0x40 -- Wall charger

0xFF -- error reading power_on_status value

- auto_msgmni

- bootloader_type	     [ X86 only ]

- bootloader_version	     [ X86 only ]

- boot_reason		     [ ARM only ]

- callhome		     [ S390 only ]

- cap_last_cap

- core_pattern

==============================================================

boot_reason:

ARM -- reason for device boot

A single bit will be set in the unsigned integer value to identify the

reason the device was booted / powered on. The value will be zero if this

feature is not supported on the ARM device being booted.

See the power-on-status field definitions in

Documentation/arm/msm/boot.txt for Qualcomm Technologies, Inc. family of

devices.

==============================================================

callhome:

Controls the kernel's callhome behavior in case of a kernel panic.

#define STACK_TOP_MAX	TASK_SIZE

#endif

extern unsigned int boot_reason;

struct debug_info {

#ifdef CONFIG_HAVE_HW_BREAKPOINT

	struct perf_event	*hbp[ARM_MAX_HBP_SLOTS];

char* (*arch_read_hardware_id)(void);

EXPORT_SYMBOL(arch_read_hardware_id);

unsigned int boot_reason;

EXPORT_SYMBOL(boot_reason);

#ifdef MULTI_CPU

struct processor processor __ro_after_init;

#endif

	KERN_NMI_WATCHDOG=75, /* int: enable/disable nmi watchdog */

	KERN_PANIC_ON_NMI=76, /* int: whether we will panic on an unrecovered */

	KERN_PANIC_ON_WARN=77, /* int: call panic() in WARN() functions */

	KERN_BOOT_REASON=78, /* int: identify reason system was booted */

};