path: root/board/freescale/mpc8548cds
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authorRuchika Gupta <>2010-12-15 17:02:08 +0000
committerKumar Gala <>2011-10-03 08:52:14 -0500
commit7065b7d466dfc4fbfa8a608cf21206efe59c01d9 (patch)
treeb6c9d32bc4be7a818a4b594b9af7e1997ffb28e8 /board/freescale/mpc8548cds
parent2f439e805e945b410b0043db82f9666eb03914ba (diff)
powerpc/p4080: Add support for secure boot flow
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 <> Signed-off-by: Kuldip Giroh <> Acked-by: Wood Scott-B07421 <> Signed-off-by: Kumar Gala <>
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