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