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/*
* Copyright (c) 2019, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <common/debug.h>
#include <lib/debugfs.h>
#include "blobs.h"
#include "dev.h"
/*******************************************************************************
* This array contains the directories available from the root directory.
******************************************************************************/
static const dirtab_t dirtab[] = {
{"dev", CHDIR | DEV_ROOT_QDEV, 0, O_READ},
{"blobs", CHDIR | DEV_ROOT_QBLOBS, 0, O_READ},
{"fip", CHDIR | DEV_ROOT_QFIP, 0, O_READ}
};
static const dirtab_t devfstab[] = {
};
/*******************************************************************************
* This function exposes the elements of the root directory.
* It also exposes the content of the dev and blobs directories.
******************************************************************************/
static int rootgen(chan_t *channel, const dirtab_t *tab, int ntab,
int n, dir_t *dir)
{
switch (channel->qid & ~CHDIR) {
case DEV_ROOT_QROOT:
tab = dirtab;
ntab = NELEM(dirtab);
break;
case DEV_ROOT_QDEV:
tab = devfstab;
ntab = NELEM(devfstab);
break;
case DEV_ROOT_QBLOBS:
tab = blobtab;
ntab = NELEM(blobtab);
break;
default:
return 0;
}
return devgen(channel, tab, ntab, n, dir);
}
static int rootwalk(chan_t *channel, const char *name)
{
return devwalk(channel, name, NULL, 0, rootgen);
}
/*******************************************************************************
* This function copies at most n bytes from the element referred by c into buf.
******************************************************************************/
static int rootread(chan_t *channel, void *buf, int size)
{
const dirtab_t *dp;
dir_t *dir;
if ((channel->qid & CHDIR) != 0) {
if (size < sizeof(dir_t)) {
return -1;
}
dir = buf;
return dirread(channel, dir, NULL, 0, rootgen);
}
/* Only makes sense when using debug language */
assert(channel->qid != DEV_ROOT_QBLOBCTL);
dp = &blobtab[channel->qid - DEV_ROOT_QBLOBCTL];
return buf_to_channel(channel, buf, dp->data, size, dp->length);
}
static int rootstat(chan_t *channel, const char *file, dir_t *dir)
{
return devstat(channel, file, dir, NULL, 0, rootgen);
}
const dev_t rootdevtab = {
.id = '/',
.stat = rootstat,
.clone = devclone,
.attach = devattach,
.walk = rootwalk,
.read = rootread,
.write = deverrwrite,
.mount = deverrmount,
.seek = devseek
};
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