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/*
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* Copyright (c) 2019, Arm Limited. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef DEBUGFS_H
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#define DEBUGFS_H
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#define NAMELEN 13 /* Maximum length of a file name */
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#define PATHLEN 41 /* Maximum length of a path */
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#define STATLEN 41 /* Size of static part of dir format */
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#define ROOTLEN (2 + 4) /* Size needed to encode root string */
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#define FILNAMLEN (2 + NAMELEN) /* Size needed to encode filename */
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#define DIRLEN (STATLEN + FILNAMLEN + 3*ROOTLEN) /* Size of dir entry */
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#define KSEEK_SET 0
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#define KSEEK_CUR 1
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#define KSEEK_END 2
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#define NELEM(tab) (sizeof(tab) / sizeof((tab)[0]))
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typedef unsigned short qid_t; /* FIXME: short type not recommended? */
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/*******************************************************************************
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* This structure contains the necessary information to represent a 9p
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* directory.
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******************************************************************************/
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typedef struct {
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char name[NAMELEN];
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long length;
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unsigned char mode;
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unsigned char index;
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unsigned char dev;
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qid_t qid;
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} dir_t;
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/* Permission definitions used as flags */
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#define O_READ (1 << 0)
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#define O_WRITE (1 << 1)
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#define O_RDWR (1 << 2)
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#define O_BIND (1 << 3)
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#define O_DIR (1 << 4)
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#define O_STAT (1 << 5)
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/* 9p interface */
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int mount(const char *srv, const char *mnt, const char *spec);
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int create(const char *name, int flags);
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int open(const char *name, int flags);
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int close(int fd);
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int read(int fd, void *buf, int n);
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int write(int fd, void *buf, int n);
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int seek(int fd, long off, int whence);
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int bind(const char *path, const char *where);
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int stat(const char *path, dir_t *dir);
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/* DebugFS initialization */
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void debugfs_init(void);
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int debugfs_smc_setup(void);
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/* Debugfs version returned through SMC interface */
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#define DEBUGFS_VERSION (0x000000001U)
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/* Function ID for accessing the debugfs interface */
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#define DEBUGFS_FID_VALUE (0x30U)
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#define is_debugfs_fid(_fid) \
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(((_fid) & FUNCID_NUM_MASK) == DEBUGFS_FID_VALUE)
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/* Error code for debugfs SMC interface failures */
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#define DEBUGFS_E_INVALID_PARAMS (-2)
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#define DEBUGFS_E_DENIED (-3)
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uintptr_t debugfs_smc_handler(unsigned int smc_fid,
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u_register_t cmd,
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u_register_t arg2,
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u_register_t arg3,
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u_register_t arg4,
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void *cookie,
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void *handle,
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uintptr_t flags);
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#endif /* DEBUGFS_H */
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