mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-27 20:38:52 +09:00
![Wolfgang Denk](/assets/img/avatar_default.png)
Several boards used different ways to specify the size of the protected area when enabling flash write protection for the sectors holding the environment variables: some used CONFIG_ENV_SIZE and CONFIG_ENV_SIZE_REDUND, some used CONFIG_ENV_SECT_SIZE, and some even a mix of both for the "normal" and the "redundant" areas. Normally, this makes no difference at all. However, things are different when you have to deal with boards that can come with different types of flash chips, which may have different sector sizes. Here we may have to chose CONFIG_ENV_SECT_SIZE such that it fits the biggest sector size, which may include several sectors on boards using the smaller sector flash types. In such a case, using CONFIG_ENV_SIZE or CONFIG_ENV_SIZE_REDUND to enable the protection may lead to the case that only the first of these sectors get protected, while the following ones aren't. This is no real problem, but it can be confusing for the user - especially on boards that use CONFIG_ENV_SECT_SIZE to protect the "normal" areas, while using CONFIG_ENV_SIZE_REDUND for the "redundant" area. To avoid such inconsistencies, I changed all sucn boards that I found to consistently use CONFIG_ENV_SECT_SIZE for protection. This should not cause any functional changes to the code. Signed-off-by: Wolfgang Denk <wd@denx.de> Cc: Paul Ruhland Cc: Pantelis Antoniou <panto@intracom.gr> Cc: Stefan Roese <sr@denx.de> Cc: Gary Jennejohn <garyj@denx.de> Cc: Dave Ellis <DGE@sixnetio.com> Acked-by: Stefan Roese <sr@denx.de>
90 lines
2.4 KiB
C
90 lines
2.4 KiB
C
/*
|
|
* (C) Copyright 2006
|
|
* Stefan Roese, DENX Software Engineering, sr@denx.de.
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* 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 (at your option) 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., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/arch/ixp425.h>
|
|
|
|
#if !defined(CONFIG_FLASH_CFI_DRIVER)
|
|
|
|
/*
|
|
* include common flash code (for esd boards)
|
|
*/
|
|
#include "../common/flash.c"
|
|
|
|
/*
|
|
* Prototypes
|
|
*/
|
|
static ulong flash_get_size (vu_long * addr, flash_info_t * info);
|
|
|
|
static inline ulong ld(ulong x)
|
|
{
|
|
ulong k = 0;
|
|
|
|
while (x >>= 1)
|
|
++k;
|
|
|
|
return k;
|
|
}
|
|
|
|
unsigned long flash_init(void)
|
|
{
|
|
unsigned long size;
|
|
int i;
|
|
|
|
/* Init: no FLASHes known */
|
|
for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; i++)
|
|
flash_info[i].flash_id = FLASH_UNKNOWN;
|
|
|
|
size = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
|
|
|
|
if (flash_info[0].flash_id == FLASH_UNKNOWN)
|
|
printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
|
|
size, size<<20);
|
|
|
|
/* Reconfigure CS0 to actual FLASH size */
|
|
*IXP425_EXP_CS0 = (*IXP425_EXP_CS0 & ~0x00003C00) | ((ld(size) - 9) << 10);
|
|
|
|
/* Monitor protection ON by default */
|
|
flash_protect(FLAG_PROTECT_SET,
|
|
CONFIG_SYS_MONITOR_BASE, CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
|
|
&flash_info[CONFIG_SYS_MAX_FLASH_BANKS - 1]);
|
|
|
|
/* Environment protection ON by default */
|
|
flash_protect(FLAG_PROTECT_SET,
|
|
CONFIG_ENV_ADDR,
|
|
CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
|
|
&flash_info[CONFIG_SYS_MAX_FLASH_BANKS - 1]);
|
|
|
|
/* Redundant environment protection ON by default */
|
|
flash_protect(FLAG_PROTECT_SET,
|
|
CONFIG_ENV_ADDR_REDUND,
|
|
CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
|
|
&flash_info[CONFIG_SYS_MAX_FLASH_BANKS - 1]);
|
|
|
|
flash_info[0].size = size;
|
|
|
|
return size;
|
|
}
|
|
|
|
#endif /* CONFIG_FLASH_CFI_DRIVER */
|