---
This patch provides the arch independent code to create the
physmem view in the proc file system. /proc/physmem
reflects the entire RAM resources that present in the system.
Even if the system has been booted with mem= or memmap= options,
this view will reflect the complete physical memory map.
---
Signed-off-by: Hariprasad Nellitheertha <[email protected]>
---
linux-2.6.12-rc1-hari/kernel/resource.c | 29 +++++++++++++++++++++++++++++
1 files changed, 29 insertions(+)
diff -puN kernel/resource.c~physmem-common kernel/resource.c
--- linux-2.6.12-rc1/kernel/resource.c~physmem-common 2005-03-23 17:48:02.000000000 +0530
+++ linux-2.6.12-rc1-hari/kernel/resource.c 2005-03-23 17:48:02.000000000 +0530
@@ -39,6 +39,15 @@ struct resource iomem_resource = {
EXPORT_SYMBOL(iomem_resource);
+struct resource physmem_resource = {
+ .name = "Phys mem",
+ .start = 0ULL,
+ .end = ~0ULL,
+ .flags = IORESOURCE_MEM,
+};
+
+EXPORT_SYMBOL(physmem_resource);
+
static DEFINE_RWLOCK(resource_lock);
#ifdef CONFIG_PROC_FS
@@ -118,6 +127,16 @@ static int iomem_open(struct inode *inod
return res;
}
+static int physmem_open(struct inode *inode, struct file *file)
+{
+ int res = seq_open(file, &resource_op);
+ if (!res) {
+ struct seq_file *m = file->private_data;
+ m->private = &physmem_resource;
+ }
+ return res;
+}
+
static struct file_operations proc_ioports_operations = {
.open = ioports_open,
.read = seq_read,
@@ -132,6 +151,13 @@ static struct file_operations proc_iomem
.release = seq_release,
};
+static struct file_operations proc_physmem_operations = {
+ .open = physmem_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
static int __init ioresources_init(void)
{
struct proc_dir_entry *entry;
@@ -142,6 +168,9 @@ static int __init ioresources_init(void)
entry = create_proc_entry("iomem", 0, NULL);
if (entry)
entry->proc_fops = &proc_iomem_operations;
+ entry = create_proc_entry("physmem", 0, NULL);
+ if (entry)
+ entry->proc_fops = &proc_physmem_operations;
return 0;
}
__initcall(ioresources_init);
_
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