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