nvs.h File Reference

Non-volatile storage. More...

#include <stdint.h>

Go to the source code of this file.

Data Structures
struct	nvs_device
	A non-volatile storage device. More...

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
	FILE_SECBOOT (PERMITTED)
int	nvs_read (struct nvs_device *nvs, unsigned int address, void *data, size_t len)
	Read from non-volatile storage device.
int	nvs_write (struct nvs_device *nvs, unsigned int address, const void *data, size_t len)
	Write to non-volatile storage device.

Detailed Description

Non-volatile storage.

Definition in file nvs.h.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

FILE_SECBOOT()

FILE_SECBOOT

(

PERMITTED

)

nvs_read()

int nvs_read ( struct nvs_device * nvs, unsigned int address, void * data, size_t len )

extern

Read from non-volatile storage device.

Parameters

nvs	NVS device
address	Address from which to read
data	Data buffer
len	Length of data buffer

Return values

rc	Return status code

Definition at line 76 of file nvs.c.

                                        {
        size_t frag_len;
        int rc;
 
        /* We don't even attempt to handle buffer lengths that aren't
         * an integral number of words.
         */
        assert ( ( len & ( ( 1 << nvs->word_len_log2 ) - 1 ) ) == 0 );
 
        while ( len ) {
 
                /* Calculate length to read, stopping at block boundaries */
                frag_len = nvs_frag_len ( nvs, address, len );
 
                /* Read this portion of the buffer from the device */
                if ( ( rc = nvs->read ( nvs, address, data, frag_len ) ) != 0 )
                        return rc;
 
                /* Update parameters */
                data += frag_len;
                address += ( frag_len >> nvs->word_len_log2 );
                len -= frag_len;
        }
 
        return 0;
}

References address, assert, data, len, nvs_frag_len(), rc, nvs_device::read, and nvs_device::word_len_log2.

Referenced by a3c90x_internal_ReadEepromContents(), falcon_probe_nvram(), icplus_probe(), ifec_pci_probe(), intel_fetch_mac_eeprom(), natsemi_hwaddr(), nvo_load(), nvs_verify(), realtek_init_eeprom(), realtek_probe(), and rtl818x_probe().

nvs_write()

int nvs_write ( struct nvs_device * nvs, unsigned int address, const void * data, size_t len )

extern

Write to non-volatile storage device.

Parameters

nvs	NVS device
address	Address to which to write
data	Data buffer
len	Length of data buffer

Return values

rc	Return status code

Definition at line 141 of file nvs.c.

                                               {
        size_t frag_len;
        int rc;
 
        /* We don't even attempt to handle buffer lengths that aren't
         * an integral number of words.
         */
        assert ( ( len & ( ( 1 << nvs->word_len_log2 ) - 1 ) ) == 0 );
 
        while ( len ) {
 
                /* Calculate length to write, stopping at block boundaries */
                frag_len = nvs_frag_len ( nvs, address, len );
 
                /* Write this portion of the buffer to the device */
                if ( ( rc = nvs->write ( nvs, address, data, frag_len ) ) != 0)
                        return rc;
 
                /* Read back and verify data */
                if ( ( rc = nvs_verify ( nvs, address, data, frag_len ) ) != 0)
                        return rc;
 
                /* Update parameters */
                data += frag_len;
                address += ( frag_len >> nvs->word_len_log2 );
                len -= frag_len;
        }
 
        return 0;
}

References address, assert, data, len, nvs_frag_len(), nvs_verify(), rc, nvs_device::word_len_log2, and nvs_device::write.

Referenced by nvo_save().