ChuanN-sudo/u-boot
1
0
Fork 0
forked from OERV-BSP/u-boot
Code Pull Requests Activity

powerpc/p4080: Add support for secure boot flow

Browse Source 
Pre u-boot Flow:
1. User loads the u-boot image in flash
2. PBL/Configuration word is used to create LAW for Flash at 0xc0000000
   (Please note that ISBC expects all these addresses, images to be
    validated, entry point etc within 0 - 3.5G range)
3. ISBC validates the u-boot image, and passes control to u-boot
   at 0xcffffffc.

Changes in u-boot:
1. Temporarily map CONFIG_SYS_MONITOR_BASE to the 1M
   CONFIG_SYS_PBI_FLASH_WINDOW in AS=1.
   (The CONFIG_SYS_PBI_FLASH_WINDOW is the address map for the flash
    created by PBL/configuration word within 0 - 3.5G memory range. The
    u-boot image at this address has been validated by ISBC code)
2. Remove TLB entries for 0 - 3.5G created by ISBC code
3. Remove the LAW entry for the CONFIG_SYS_PBI_FLASH_WINDOW created by
   PBL/configuration word after switch to AS = 1

Signed-off-by: Ruchika Gupta <ruchika.gupta@freescale.com>
Signed-off-by: Kuldip Giroh <kuldip.giroh@freescale.com>
Acked-by: Wood Scott-B07421 <B07421@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Ruchika Gupta
2010-12-15 17:02:08 +00:00
committed by Kumar Gala
parent 2f439e805e
commit 7065b7d466
7 changed files with 123 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

43
arch/powerpc/include/asm/fsl_secure_boot.h Normal file
View File

@@ -0,0 +1,43 @@
/*
* Copyright 2010-2011 Freescale Semiconductor, Inc.
*
* 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
*/
#ifndef __FSL_SECURE_BOOT_H
#define __FSL_SECURE_BOOT_H
/* Starting TLB number for the TLB entried for 3.5 G space created by ISBC */
#if defined(CONFIG_FSL_CORENET)
#define CONFIG_SYS_ISBC_START_TLB 3
#else
#define CONFIG_SYS_ISBC_START_TLB 0
#endif
/* Number fo TLB's created by ISBC */
#define CONFIG_SYS_ISBC_NUM_TLBS 5
#if defined(CONFIG_FSL_CORENET)
#define CONFIG_SYS_PBI_FLASH_BASE 0xc0000000
#else
#define CONFIG_SYS_PBI_FLASH_BASE 0xce000000
#endif
#define CONFIG_SYS_PBI_FLASH_WINDOW 0xcff80000
#endif