android/drivers/misc/mediatek/include/mt-plat/mrdump.h

/*
 * Copyright (C) 2016 MediaTek Inc.
 *
 * 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.
 *
 * 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 http://www.gnu.org/licenses/gpl-2.0.html for more details.
 */

#if !defined(__MRDUMP_H__)
#define __MRDUMP_H__

#include <stdarg.h>
#include <linux/elf.h>
#include <linux/elfcore.h>
#include <asm/ptrace.h>
#include <mt-plat/aee.h>

#ifdef __aarch64__
#define reg_pc	pc
#define reg_lr	regs[30]
#define reg_sp	sp
#define reg_fp	regs[29]
#else
#define reg_pc	ARM_pc
#define reg_lr	ARM_lr
#define reg_sp	ARM_sp
#define reg_ip	ARM_ip
#define reg_fp	ARM_fp
#endif

#define MRDUMP_CPU_MAX 12

#define MRDUMP_ENABLE_COOKIE 0x590d2ba3

#define MRDUMP_GO_DUMP "MRDUMP11"

#define KSYM_32        1
#define KSYM_64        2

typedef uint32_t arm32_gregset_t[18];
typedef uint64_t aarch64_gregset_t[34];

struct arm32_ctrl_regs {
	uint32_t sctlr;
	uint64_t ttbcr;
	uint64_t ttbr0;
	uint64_t ttbr1;
};

struct aarch64_ctrl_regs {
	uint64_t sctlr_el1;
	uint64_t sctlr_el2;
	uint64_t sctlr_el3;

	uint64_t tcr_el1;
	uint64_t tcr_el2;
	uint64_t tcr_el3;

	uint64_t ttbr0_el1;
	uint64_t ttbr0_el2;
	uint64_t ttbr0_el3;

	uint64_t ttbr1_el1;

	uint64_t sp_el[4];
};

struct mrdump_arm32_reg {
	arm32_gregset_t arm32_regs;
	struct arm32_ctrl_regs arm32_creg;
};

struct mrdump_arm64_reg {
	aarch64_gregset_t arm64_regs;
	struct aarch64_ctrl_regs arm64_creg;
};

struct mrdump_crash_record {
	int reboot_mode;

	char msg[128];

	uint32_t fault_cpu;

	union {
		struct mrdump_arm32_reg arm32_reg;
		struct mrdump_arm64_reg arm64_reg;
	} cpu_reg[0];
};

struct mrdump_ksyms_param {
	char     tag[4];
	uint32_t flag;
	uint32_t crc;
	uint64_t start_addr;
	uint32_t size;
	uint32_t addresses_off;
	uint32_t num_syms_off;
	uint32_t names_off;
	uint32_t markers_off;
	uint32_t token_table_off;
	uint32_t token_index_off;
} __packed;

struct mrdump_machdesc {
	uint32_t nr_cpus;

	uint64_t page_offset;
	uint64_t high_memory;

	uint64_t kimage_vaddr;
	uint64_t dram_start;
	uint64_t dram_end;
	uint64_t kimage_stext;
	uint64_t kimage_etext;
	uint64_t kimage_stext_real;
	uint64_t kimage_voffset;
	uint64_t unused0;
	uint64_t unused1;

	uint64_t vmalloc_start;
	uint64_t vmalloc_end;

	uint64_t modules_start;
	uint64_t modules_end;

	uint64_t phys_offset;
	uint64_t master_page_table;

	uint64_t memmap;
	uint64_t pageflags;
	uint32_t struct_page_size;

	uint64_t dfdmem_pa;

	struct mrdump_ksyms_param kallsyms;
};

struct mrdump_control_block {
	char sig[8];

	struct mrdump_machdesc machdesc;
	uint32_t machdesc_crc;

	uint32_t enabled;
	uint32_t output_fs_lbaooo;

	struct mrdump_crash_record crash_record;
};

/* NOTE!! any change to this struct should be compatible in aed */
struct mrdump_mini_reg_desc {
	unsigned long reg;	/* register value */
	unsigned long kstart;	/* start kernel addr of memory dump */
	unsigned long kend;	/* end kernel addr of memory dump */
	unsigned long pos;	/* next pos to dump */
	int valid;		/* 1: valid regiser, 0: invalid regiser */
	int pad;		/* reserved */
	loff_t offset;		/* offset in buffer */
};

/* it should always be smaller than MRDUMP_MINI_HEADER_SIZE */
struct mrdump_mini_header {
	struct mrdump_mini_reg_desc reg_desc[ELF_NGREG];
};

#define MRDUMP_MINI_NR_SECTION 60
#define MRDUMP_MINI_SECTION_SIZE (32 * 1024)
#define NT_IPANIC_MISC 4095
#define MRDUMP_MINI_NR_MISC 40
#define MRDUMP_MINI_MISC_LOAD "load"

struct mrdump_mini_elf_misc {
	unsigned long vaddr;
	unsigned long paddr;
	unsigned long start;
	unsigned long size;
};

#define NOTE_NAME_SHORT 12
#define NOTE_NAME_LONG  20

struct mrdump_mini_elf_psinfo {
		struct elf_note note;
		char name[NOTE_NAME_SHORT];
		struct elf_prpsinfo data;
};

struct mrdump_mini_elf_prstatus {
		struct elf_note note;
		char name[NOTE_NAME_SHORT];
		struct elf_prstatus data;
};

struct mrdump_mini_elf_note {
		struct elf_note note;
		char name[NOTE_NAME_LONG];
		struct mrdump_mini_elf_misc data;
};

struct mrdump_mini_elf_header {
	struct elfhdr ehdr;
	struct elf_phdr phdrs[MRDUMP_MINI_NR_SECTION];
	struct mrdump_mini_elf_psinfo psinfo;
	struct mrdump_mini_elf_prstatus prstatus[NR_CPUS];
	struct mrdump_mini_elf_note misc[MRDUMP_MINI_NR_MISC];
};

struct mrdump_rsvmem_block {
	phys_addr_t start_addr;
	phys_addr_t size;
};


#define MRDUMP_MINI_HEADER_SIZE	\
	ALIGN(sizeof(struct mrdump_mini_elf_header), PAGE_SIZE)
#define MRDUMP_MINI_DATA_SIZE	\
	(MRDUMP_MINI_NR_SECTION * MRDUMP_MINI_SECTION_SIZE)
#define MRDUMP_MINI_BUF_SIZE (MRDUMP_MINI_HEADER_SIZE + MRDUMP_MINI_DATA_SIZE)

int mrdump_init(void);
void __mrdump_create_oops_dump(enum AEE_REBOOT_MODE reboot_mode,
		struct pt_regs *regs, const char *msg, ...);

int mrdump_common_die(int fiq_step, int reboot_reason, const char *msg,
		      struct pt_regs *regs);
#endif