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/*
* Copyright (c) 2015, Christoph Hellwig.
*/
#include <linux/memblock.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <asm/e820.h>
#include <asm/page_types.h>
#include <asm/setup.h>
static __init void register_pmem_device(struct resource *res)
{
struct platform_device *pdev;
int error;
pdev = platform_device_alloc("pmem", PLATFORM_DEVID_AUTO);
if (!pdev)
return;
error = platform_device_add_resources(pdev, res, 1);
if (error)
goto out_put_pdev;
error = platform_device_add(pdev);
if (error)
goto out_put_pdev;
return;
out_put_pdev:
dev_warn(&pdev->dev, "failed to add 'pmem' (persistent memory) device!\n");
platform_device_put(pdev);
}
static __init int register_pmem_devices(void)
{
int i;
for (i = 0; i < e820.nr_map; i++) {
struct e820entry *ei = &e820.map[i];
if (ei->type == E820_PRAM) {
struct resource res = {
.flags = IORESOURCE_MEM,
.start = ei->addr,
.end = ei->addr + ei->size - 1,
};
register_pmem_device(&res);
}
}
return 0;
}
device_initcall(register_pmem_devices);
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