53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
||
|
|
/*
|
||
|
|
* Debugfs for reserved memory blocks.
|
||
|
|
*
|
||
|
|
* Copyright (C) 2022 Rockchip Electronics Co. Ltd.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/debugfs.h>
|
||
|
|
#include <linux/seq_file.h>
|
||
|
|
#include <linux/memblock.h>
|
||
|
|
|
||
|
|
#define K(size) ((unsigned long)((size) >> 10))
|
||
|
|
|
||
|
|
static int memblock_debugfs_show(struct seq_file *m, void *private)
|
||
|
|
{
|
||
|
|
struct memblock_type *type = m->private;
|
||
|
|
struct memblock_region *reg;
|
||
|
|
int i;
|
||
|
|
phys_addr_t end;
|
||
|
|
unsigned long z = 0, t = 0;
|
||
|
|
|
||
|
|
for (i = 0; i < type->cnt; i++) {
|
||
|
|
reg = &type->regions[i];
|
||
|
|
end = reg->base + reg->size - 1;
|
||
|
|
z = (unsigned long)reg->size;
|
||
|
|
t += z;
|
||
|
|
|
||
|
|
seq_printf(m, "%4d: ", i);
|
||
|
|
seq_printf(m, "%pa..%pa (%10lu %s)\n", ®->base, &end,
|
||
|
|
(z >= 1024) ? (K(z)) : z,
|
||
|
|
(z >= 1024) ? "KiB" : "Bytes");
|
||
|
|
}
|
||
|
|
seq_printf(m, "Total: %lu KiB\n", K(t));
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
DEFINE_SHOW_ATTRIBUTE(memblock_debugfs);
|
||
|
|
|
||
|
|
static int __init memblock_debugfs_init(void)
|
||
|
|
{
|
||
|
|
struct dentry *root = debugfs_lookup("memblock", NULL);
|
||
|
|
|
||
|
|
if (!root)
|
||
|
|
return -EPROBE_DEFER;
|
||
|
|
|
||
|
|
debugfs_create_file("reserved_size", 0444, root,
|
||
|
|
&memblock.reserved, &memblock_debugfs_fops);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
late_initcall(memblock_debugfs_init);
|