include/asm/mrccache.h

1 /* SPDX-License-Identifier: GPL-2.0+ */
18 	u32	data_size;	/* Size of the 'data' field */
21 	u8	data[0];	/* Variable size, platform/run time dependent */
33  * mrccache_find_current() - find the latest MRC cache record
35  * This searches the MRC cache region looking for the latest record to use
38  * @entry:	Position and size of MRC cache in SPI flash
44  * mrccache_update() - update the MRC cache with a new record
46  * This writes a new record to the end of the MRC cache region. If the new
50  * @entry:	Position and size of MRC cache in SPI flash
52  * @return 0 if updated, -EEXIST if the record is the same as the latest
53  * record, -EINVAL if the record is not valid, other error if SPI write failed
59  * mrccache_reserve() - reserve MRC data on the stack
61  * This copies MRC data pointed by gd->arch.mrc_output to a new place on the
62  * stack with length gd->arch.mrc_output_len, and updates gd->arch.mrc_output
65  * This routine should be called by reserve_arch() before U-Boot is relocated
66  * when MRC cache is enabled.
73  * mrccache_get_region() - get MRC region on the SPI flash
75  * This gets MRC region whose offset and size are described in the device tree
76  * as a subnode to the SPI flash. If a non-NULL device pointer is supplied,
80  * Be careful when calling this routine with a non-NULL device pointer:
81  * - driver model initialization must be complete
82  * - calling in the pre-relocation phase may bring some side effects during
88  * @entry:	Position and size of MRC cache in SPI flash
89  * @return 0 if success, -ENOENT if SPI flash node does not exist in the
90  * device tree, -EPERM if MRC region subnode does not exist in the device
91  * tree, -EINVAL if MRC region properties format is incorrect, other error
97  * mrccache_save() - save MRC data to the SPI flash
99  * This saves MRC data stored previously by gd->arch.mrc_output to a proper