1/*- 2 * Copyright (c) 2013 Robert N. M. Watson 3 * All rights reserved. 4 * 5 * This software was developed by SRI International and the University of 6 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) 7 * ("CTSRD"), as part of the DARPA CRASH research programme. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD$ 31 */ 32 33#include "stand.h" 34#include "mips.h" 35#include "cfi.h" 36 37/* 38 * Memory-mapped Intel StrataFlash mini-driver. Very mini. Nothing fancy -- 39 * and few seatbelts. 40 * 41 * XXXRW: Should we be making some effort to reset isf to a known-good state 42 * before starting, in case there was a soft reset mid-transaction. 43 * 44 * XXXRW: Would be nice to support multiple devices and also handle SD cards 45 * here ... and probably not too hard. 46 */ 47extern void *__cheri_flash_bootfs_vaddr__; 48extern void *__cheri_flash_bootfs_len__; 49 50#define CHERI_BOOTFS_BASE ((uintptr_t)&__cheri_flash_bootfs_vaddr__) 51#define CHERI_BOOTFS_LENGTH ((uintptr_t)&__cheri_flash_bootfs_len__) 52 53int 54cfi_read(void *buf, unsigned lba, unsigned nblk) 55{ 56 57 if ((lba << 9) + (nblk << 9) > CHERI_BOOTFS_LENGTH) 58 return (-1); 59 memcpy(buf, (void *)(CHERI_BOOTFS_BASE + (lba << 9)), nblk << 9); 60 return (0); 61} 62 63uint64_t 64cfi_get_mediasize(void) 65{ 66 67 return (CHERI_BOOTFS_LENGTH); 68} 69 70uint64_t 71cfi_get_sectorsize(void) 72{ 73 74 return (512); /* Always a good sector size. */ 75} 76