/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2017-2021, The Linux Foundation. All rights reserved.
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* Copyright (c) 2023 Rockchip Electronics Co., Ltd.
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*/
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#ifndef __RK_MINIDUMP_H
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#define __RK_MINIDUMP_H
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#include <linux/types.h>
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#define MD_MAX_NAME_LENGTH 16
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/* md_region - Minidump table entry
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* @name: Entry name, Minidump will dump binary with this name.
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* @id: Entry ID, used only for SDI dumps.
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* @virt_addr: Address of the entry.
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* @phys_addr: Physical address of the entry to dump.
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* @size: Number of byte to dump from @address location
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* it should be 4 byte aligned.
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*/
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struct md_region {
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char name[MD_MAX_NAME_LENGTH];
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u32 id;
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u64 virt_addr;
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u64 phys_addr;
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u64 size;
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};
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#if IS_REACHABLE(CONFIG_ROCKCHIP_MINIDUMP)
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/*
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* Register an entry in Minidump table
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* Returns:
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* region number: entry position in minidump table.
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* Negative error number on failures.
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*/
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int rk_minidump_add_region(const struct md_region *entry);
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int rk_minidump_remove_region(const struct md_region *entry);
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/*
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* Update registered region address in Minidump table.
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* It does not hold any locks, so strictly serialize the region updates.
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* Returns:
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* Zero: on successfully update
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* Negetive error number on failures.
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*/
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int rk_minidump_update_region(int regno, const struct md_region *entry);
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bool rk_minidump_enabled(void);
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void rk_minidump_update_cpu_regs(struct pt_regs *regs);
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#else
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static inline int rk_minidump_add_region(const struct md_region *entry)
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{
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/* Return quietly, if minidump is not supported */
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return 0;
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}
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static inline int rk_minidump_remove_region(const struct md_region *entry)
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{
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return 0;
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}
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static inline int rk_minidump_update_region(int regno, const struct md_region *entry)
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{
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return 0;
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}
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static inline bool rk_minidump_enabled(void) { return false; }
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static inline void rk_minidump_update_cpu_regs(struct pt_regs *regs) { return; }
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#endif
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extern void rk_md_flush_dcache_area(void *addr, size_t len);
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#endif /* __RK_MINIDUMP_H */
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