linux-imx

// SPDX-License-Identifier: GPL-2.0-only

#include <linux/types.h>

#include <linux/string.h>

#include <linux/init.h>

#include <linux/module.h>

#include <linux/ctype.h>

#include <linux/dmi.h>

#include <linux/efi.h>

#include <linux/memblock.h>

#include <linux/random.h>

#include <asm/dmi.h>

#include <asm/unaligned.h>

​

struct kobject *dmi_kobj;

EXPORT_SYMBOL_GPL(dmi_kobj);

​

/*

 * DMI stands for "Desktop Management Interface".  It is part

 * of and an antecedent to, SMBIOS, which stands for System

 * Management BIOS.  See further: http://www.dmtf.org/standards

 */

static const char dmi_empty_string[] = "";

​

static u32 dmi_ver __initdata;

static u32 dmi_len;

static u16 dmi_num;

static u8 smbios_entry_point[32];

static int smbios_entry_point_size;

​

/* DMI system identification string used during boot */

static char dmi_ids_string[128] __initdata;

​

static struct dmi_memdev_info {

    const char *device;

    const char *bank;

    u64 size;       /* bytes */

    u16 handle;

} *dmi_memdev;

static int dmi_memdev_nr;

​

static const char * __init dmi_string_nosave(const struct dmi_header *dm, u8 s)

{

    const u8 *bp = ((u8 *) dm) + dm->length;

    const u8 *nsp;

​

    if (s) {

        while (--s > 0 && *bp)

            bp += strlen(bp) + 1;

​

        /* Strings containing only spaces are considered empty */

        nsp = bp;

        while (*nsp == ' ')

            nsp++;

        if (*nsp != '\0')

            return bp;

    }

​

    return dmi_empty_string;

}

​

static const char * __init dmi_string(const struct dmi_header *dm, u8 s)

{

    const char *bp = dmi_string_nosave(dm, s);

    char *str;

    size_t len;

​

    if (bp == dmi_empty_string)

        return dmi_empty_string;

​

    len = strlen(bp) + 1;

    str = dmi_alloc(len);

    if (str != NULL)

        strcpy(str, bp);

​

    return str;

}

​

/*

 *  We have to be cautious here. We have seen BIOSes with DMI pointers

 *  pointing to completely the wrong place for example

 */

static void dmi_decode_table(u8 *buf,

                 void (*decode)(const struct dmi_header *, void *),

                 void *private_data)

{

    u8 *data = buf;

    int i = 0;

​

    /*

     * Stop when we have seen all the items the table claimed to have

     * (SMBIOS < 3.0 only) OR we reach an end-of-table marker (SMBIOS

     * >= 3.0 only) OR we run off the end of the table (should never