diff options
Diffstat (limited to 'gpxe/src/drivers/nvs/nvs.c')
-rw-r--r-- | gpxe/src/drivers/nvs/nvs.c | 149 |
1 files changed, 0 insertions, 149 deletions
diff --git a/gpxe/src/drivers/nvs/nvs.c b/gpxe/src/drivers/nvs/nvs.c deleted file mode 100644 index 7252808b..00000000 --- a/gpxe/src/drivers/nvs/nvs.c +++ /dev/null @@ -1,149 +0,0 @@ -/* - * Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -FILE_LICENCE ( GPL2_OR_LATER ); - -#include <stdint.h> -#include <string.h> -#include <errno.h> -#include <assert.h> -#include <gpxe/nvs.h> - -/** @file - * - * Non-volatile storage - * - */ - -/** - * Read from non-volatile storage device - * - * @v nvs NVS device - * @v address Address from which to read - * @v data Data buffer - * @v len Length of data buffer - * @ret rc Return status code - */ -int nvs_read ( struct nvs_device *nvs, unsigned int address, - void *data, size_t len ) { - 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 space remaining up to next block boundary */ - frag_len = ( ( nvs->block_size - - ( address & ( nvs->block_size - 1 ) ) ) - << nvs->word_len_log2 ); - - /* Limit to space remaining in buffer */ - if ( frag_len > len ) - frag_len = 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; -} - -/** - * Verify content of non-volatile storage device - * - * @v nvs NVS device - * @v address Address from which to read - * @v data Data to compare against - * @v len Length of data buffer - * @ret rc Return status code - */ -static int nvs_verify ( struct nvs_device *nvs, unsigned int address, - const void *data, size_t len ) { - uint8_t read_data[len]; - int rc; - - /* Read data into temporary buffer */ - if ( ( rc = nvs_read ( nvs, address, read_data, len ) ) != 0 ) - return rc; - - /* Compare data */ - if ( memcmp ( data, read_data, len ) != 0 ) { - DBG ( "NVS %p verification failed at %#04x+%zd\n", - nvs, address, len ); - return -EIO; - } - - return 0; -} - -/** - * Write to non-volatile storage device - * - * @v nvs NVS device - * @v address Address to which to write - * @v data Data buffer - * @v len Length of data buffer - * @ret rc Return status code - */ -int nvs_write ( struct nvs_device *nvs, unsigned int address, - const void *data, size_t len ) { - 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 space remaining up to next block boundary */ - frag_len = ( ( nvs->block_size - - ( address & ( nvs->block_size - 1 ) ) ) - << nvs->word_len_log2 ); - - /* Limit to space remaining in buffer */ - if ( frag_len > len ) - frag_len = 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; -} |