On Tue, 2014-02-04 at 01:41 -0600, Bansal Aneesh-B39320 wrote: > > -----Original Message----- > > From: Wood Scott-B07421 > > Sent: Tuesday, February 04, 2014 4:32 AM > > To: Bansal Aneesh-B39320 > > Cc: u-boot@lists.denx.de; Sun York-R58495; Gupta Ruchika-R66431 > > Subject: Re: [PATCH][v3] powerpc/mpc85xx: SECURE BOOT- Add secure boot > > target for B4860QDS > > > > On Mon, 2014-02-03 at 14:47 +0530, Aneesh Bansal wrote: > > > Changes: > > > 1. L2 cache is being invalidated by Boot ROM code for e6500 core. > > > So removing the invalidation from start.S 2. Clear the LAW and > > > corresponding configuration for CPC. Boot ROM > > > code uses it as hosekeeping area. > > > 3. For Secure boot, CPC is configured as SRAM and used as house > > > keeping area. This configuration is to be disabled once in uboot. > > > Earlier this disabling of CPC as SRAM was happening in cpu_init_r. > > > As a result cache invalidation function was getting skipped in > > > case CPC is configured as SRAM.This was causing random crashes. > > > > > > Signed-off-by: Ruchika Gupta <ruchika.gu...@freescale.com> > > > Signed-off-by: Aneesh Bansal <aneesh.ban...@freescale.com> > > > --- > > > README | 4 ++++ > > > arch/powerpc/cpu/mpc85xx/cpu_init.c | 27 > > ++++++++++++++++++++++----- > > > arch/powerpc/cpu/mpc85xx/start.S | 3 ++- > > > arch/powerpc/include/asm/fsl_secure_boot.h | 6 ++++++ > > > boards.cfg | 1 + > > > 5 files changed, 35 insertions(+), 6 deletions(-) > > > > > > Changes from v2: > > > Squashed with previous patch after removing the ISBC version as per > > discussion. > > > Changed the Subject Line. > > > > > > diff --git a/README b/README > > > index 176de61..3ca307f 100644 > > > --- a/README > > > +++ b/README > > > @@ -428,6 +428,10 @@ The following options need to be configured: > > > In this mode, a single differential clock is used to supply > > > clocks to the sysclock, ddrclock and usbclock. > > > > > > + CONFIG_SYS_SECURE_HKAREA_CPC > > > + This CONFIG is defined for the SoC's in which the BootROM > > code uses > > > + the platform cache configured as SRAM for house keeping. > > > > What sort of house keeping? The bootrom is finished by the time U-Boot > > starts, right? What restrictions are there on U-Boot's use of the SRAM? > > > > -Scott > > > For Secure Boot, CPC is configured as SRAM by the PBI commands and BootROM > uses > it for sending commands to SEC block.
Why does U-Boot care? > In U-boot CPC is to be configured as platform > cache and before doing so, the configuration of CPC as SRAM needs to be > removed. So all you need is something saying that U-Boot is entered with the CPC configured as SRAM. We don't care whether it's for "secure hkarea". Right? -Scott _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
