76 lines
2.5 KiB
C
76 lines
2.5 KiB
C
/*-
|
|
* Copyright (c) 2013 Robert N. M. Watson
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed by SRI International and the University of
|
|
* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
|
|
* ("CTSRD"), as part of the DARPA CRASH research programme.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include "util.h"
|
|
#include "mips.h"
|
|
#include "cfi.h"
|
|
|
|
/*
|
|
* Memory-mapped Intel StrataFlash mini-driver. Very mini. Nothing fancy --
|
|
* and few seatbelts.
|
|
*
|
|
* XXXRW: Should we be making some effort to reset isf to a known-good state
|
|
* before starting, in case there was a soft reset mid-transaction.
|
|
*
|
|
* XXXRW: Would be nice to support multiple devices and also handle SD cards
|
|
* here ... and probably not too hard.
|
|
*/
|
|
extern void *__cheri_flash_bootfs_vaddr__;
|
|
extern void *__cheri_flash_bootfs_len__;
|
|
|
|
#define CHERI_BOOTFS_BASE ((uintptr_t)&__cheri_flash_bootfs_vaddr__)
|
|
#define CHERI_BOOTFS_LENGTH ((uintptr_t)&__cheri_flash_bootfs_len__)
|
|
|
|
int
|
|
cfi_read(void *buf, unsigned lba, unsigned nblk)
|
|
{
|
|
|
|
if ((lba << 9) + (nblk << 9) > CHERI_BOOTFS_LENGTH)
|
|
return (-1);
|
|
memcpy(buf, (void *)(CHERI_BOOTFS_BASE + (lba << 9)), nblk << 9);
|
|
return (0);
|
|
}
|
|
|
|
uint64_t
|
|
cfi_get_mediasize(void)
|
|
{
|
|
|
|
return (CHERI_BOOTFS_LENGTH);
|
|
}
|
|
|
|
uint64_t
|
|
cfi_get_sectorsize(void)
|
|
{
|
|
|
|
return (512); /* Always a good sector size. */
|
|
}
|