mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
7065b7d466
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>
44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
/*
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* Copyright 2010-2011 Freescale Semiconductor, Inc.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef __FSL_SECURE_BOOT_H
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#define __FSL_SECURE_BOOT_H
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/* Starting TLB number for the TLB entried for 3.5 G space created by ISBC */
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#if defined(CONFIG_FSL_CORENET)
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#define CONFIG_SYS_ISBC_START_TLB 3
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#else
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#define CONFIG_SYS_ISBC_START_TLB 0
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#endif
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/* Number fo TLB's created by ISBC */
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#define CONFIG_SYS_ISBC_NUM_TLBS 5
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#if defined(CONFIG_FSL_CORENET)
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#define CONFIG_SYS_PBI_FLASH_BASE 0xc0000000
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#else
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#define CONFIG_SYS_PBI_FLASH_BASE 0xce000000
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#endif
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#define CONFIG_SYS_PBI_FLASH_WINDOW 0xcff80000
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#endif
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