From: bob picco <bpicco@xxxxxxxxxx>
This patch adds sparc RAM to /proc/iomem. It also identifies the
code, data and bss regions of the kernel.
Signed-off-by: Bob Picco <bob.picco@xxxxxxxxxx>
---
arch/sparc/mm/init_64.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 65 insertions(+), 0 deletions(-)
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index 9c4a820..b72e51a 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -22,6 +22,7 @@
#include <linux/kprobes.h>
#include <linux/cache.h>
#include <linux/sort.h>
+#include <linux/ioport.h>
#include <linux/percpu.h>
#include <linux/memblock.h>
#include <linux/mmzone.h>
@@ -2705,3 +2706,67 @@ int devmem_is_allowed(unsigned long pagenr)
return rc;
}
#endif
+
+static struct resource code_resource = {
+ .name = "Kernel code",
+ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+};
+
+static struct resource data_resource = {
+ .name = "Kernel data",
+ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+};
+
+static struct resource bss_resource = {
+ .name = "Kernel bss",
+ .flags = IORESOURCE_BUSY | IORESOURCE_MEM
+};
+
+static inline resource_size_t compute_kern_paddr(void *addr)
+{
+ return (resource_size_t) (addr - KERNBASE + kern_base);
+}
+
+static void __init kernel_lds_init(void)
+{
+ code_resource.start = compute_kern_paddr(_text);
+ code_resource.end = compute_kern_paddr(_etext - 1);
+ data_resource.start = compute_kern_paddr(_etext);
+ data_resource.end = compute_kern_paddr(_edata - 1);
+ bss_resource.start = compute_kern_paddr(__bss_start);
+ bss_resource.end = compute_kern_paddr(_end - 1);
+}
+
+static int __init report_memory(void)
+{
+ int i;
+ struct resource *res;
+
+ kernel_lds_init();
+
+ for (i = 0; i < pavail_ents; i++) {
+ res = kzalloc(sizeof(struct resource), GFP_KERNEL);
+
+ if (!res) {
+ pr_warn("Failed to allocate source.\n");
+ break;
+ }
+
+ res->name = "System RAM";
+ res->start = pavail[i].phys_addr;
+ res->end = pavail[i].phys_addr + pavail[i].reg_size - 1;
+ res->flags = IORESOURCE_BUSY | IORESOURCE_MEM;
+
+ if (insert_resource(&iomem_resource, res) < 0) {
+ pr_warn("Resource insertion failed.\n");
+ break;
+ }
+
+ insert_resource(res, &code_resource);
+ insert_resource(res, &data_resource);
+ insert_resource(res, &bss_resource);
+ }
+
+ return 0;
+}
+device_initcall(report_memory);
--
1.7.1
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