boot_device.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <boot_device.h>
 
void __weak boot_device_init(void)
{
        /* Provide weak do-nothing init. */
}
 
int __weak boot_device_wp_region(const struct region_device *rd,
                                 const enum bootdev_prot_type type)
{
        /* return a failure, make aware WP is not implemented */
        return -1;
}
 
static int boot_device_subregion(const struct region *sub,
                                struct region_device *subrd,
                                const struct region_device *parent)
{
        if (parent == NULL)
                return -1;
 
        return rdev_chain(subrd, parent, region_offset(sub), region_sz(sub));
}
 
int boot_device_ro_subregion(const struct region *sub,
                                struct region_device *subrd)
{
        /* Ensure boot device has been initialized at least once. */
        boot_device_init();
 
        return boot_device_subregion(sub, subrd, boot_device_ro());
}
 
int boot_device_rw_subregion(const struct region *sub,
                                struct region_device *subrd)
{
        /* Ensure boot device has been initialized at least once. */
        boot_device_init();
 
        return boot_device_subregion(sub, subrd, boot_device_rw());
}