From 102b0d2daa97dae68d3eed54d8fe37a9cc38a892 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 11:13:47 +0200 Subject: Adding upstream version 2.8.0+dfsg. Signed-off-by: Daniel Baumann --- include/lib/debugfs.h | 83 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 include/lib/debugfs.h (limited to 'include/lib/debugfs.h') diff --git a/include/lib/debugfs.h b/include/lib/debugfs.h new file mode 100644 index 0000000..8ed237a --- /dev/null +++ b/include/lib/debugfs.h @@ -0,0 +1,83 @@ +/* + * 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 */ -- cgit v1.2.3