sh: add memory resources to /proc/iomem

Add physical memory resources such as System RAM, Kernel code/data/bss
and reserved crash dump area to /proc/iomem. Same strategy as on x86.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 37 insertions, 1 deletions

diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index c9fb912a78e2..516bde9c50fa 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -87,6 +87,8 @@ EXPORT_SYMBOL(memory_start);
 unsigned long memory_end = 0;
 EXPORT_SYMBOL(memory_end);
 
+static struct resource mem_resources[MAX_NUMNODES];
+
 int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
 
 static int __init early_parse_mem(char *p)
@@ -175,6 +177,40 @@ static inline void __init reserve_crashkernel(void)
 {}
 #endif
 
+void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
+                                                unsigned long end_pfn)
+{
+        struct resource *res = &mem_resources[nid];
+
+        WARN_ON(res->name); /* max one active range per node for now */
+
+        res->name = "System RAM";
+        res->start = start_pfn << PAGE_SHIFT;
+        res->end = (end_pfn << PAGE_SHIFT) - 1;
+        res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+        if (request_resource(&iomem_resource, res)) {
+                pr_err("unable to request memory_resource 0x%lx 0x%lx\n",
+                       start_pfn, end_pfn);
+                return;
+        }
+
+        /*
+         *  We don't know which RAM region contains kernel data,
+         *  so we try it repeatedly and let the resource manager
+         *  test it.
+         */
+        request_resource(res, &code_resource);
+        request_resource(res, &data_resource);
+        request_resource(res, &bss_resource);
+
+#ifdef CONFIG_KEXEC
+        if (crashk_res.start != crashk_res.end)
+                request_resource(res, &crashk_res);
+#endif
+
+        add_active_range(nid, start_pfn, end_pfn);
+}
+
 void __init setup_bootmem_allocator(unsigned long free_pfn)
 {
         unsigned long bootmap_size;
@@ -187,7 +223,7 @@ void __init setup_bootmem_allocator(unsigned long free_pfn)
         bootmap_size = init_bootmem_node(NODE_DATA(0), free_pfn,
                                          min_low_pfn, max_low_pfn);
 
-        add_active_range(0, min_low_pfn, max_low_pfn);
+        __add_active_range(0, min_low_pfn, max_low_pfn);
         register_bootmem_low_pages();
 
         node_set_online(0);