diff options
Diffstat (limited to 'mm/memblock.c')
| -rw-r--r-- | mm/memblock.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/mm/memblock.c b/mm/memblock.c index 9de5fcdf8e28..cc15be29fd0a 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -16,6 +16,8 @@ #include <linux/bitops.h> #include <linux/poison.h> #include <linux/pfn.h> +#include <linux/debugfs.h> +#include <linux/seq_file.h> #include <linux/memblock.h> struct memblock memblock; @@ -740,3 +742,52 @@ static int __init early_memblock(char *p) } early_param("memblock", early_memblock); +#ifdef CONFIG_DEBUG_FS + +static int memblock_debug_show(struct seq_file *m, void *private) +{ + struct memblock_type *type = m->private; + struct memblock_region *reg; + int i; + + for (i = 0; i < type->cnt; i++) { + reg = &type->regions[i]; + seq_printf(m, "%4d: ", i); + if (sizeof(phys_addr_t) == 4) + seq_printf(m, "0x%08lx..0x%08lx\n", + (unsigned long)reg->base, + (unsigned long)(reg->base + reg->size - 1)); + else + seq_printf(m, "0x%016llx..0x%016llx\n", + (unsigned long long)reg->base, + (unsigned long long)(reg->base + reg->size - 1)); + + } + return 0; +} + +static int memblock_debug_open(struct inode *inode, struct file *file) +{ + return single_open(file, memblock_debug_show, inode->i_private); +} + +static const struct file_operations memblock_debug_fops = { + .open = memblock_debug_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int __init memblock_init_debugfs(void) +{ + struct dentry *root = debugfs_create_dir("memblock", NULL); + if (!root) + return -ENXIO; + debugfs_create_file("memory", S_IRUGO, root, &memblock.memory, &memblock_debug_fops); + debugfs_create_file("reserved", S_IRUGO, root, &memblock.reserved, &memblock_debug_fops); + + return 0; +} +__initcall(memblock_init_debugfs); + +#endif /* CONFIG_DEBUG_FS */ |