-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 12/11/12 10:35, Vincent Stehlé wrote: > We introduce an OMAP5 specific version of > arm_setup_identity_mapping(), which makes the first page of the > identity mapping invalid. > > We want to unmap the region near address zero on HS OMAP devices, > to avoid speculative accesses. Accessing this region causes > security violations, which we want to avoid. > > Signed-off-by: Vincent Stehlé <v-ste...@ti.com> Cc: Tom Rini > <tr...@ti.com> --- Changes for v2: - Fix missing page_table > argument - Add extern definition to fix compilation warning > > arch/arm/cpu/armv7/omap5/Makefile | 1 + > arch/arm/cpu/armv7/omap5/cache-cp15.c | 46 > +++++++++++++++++++++++++++++++++ 2 files changed, 47 insertions(+) > create mode 100644 arch/arm/cpu/armv7/omap5/cache-cp15.c > > diff --git a/arch/arm/cpu/armv7/omap5/Makefile > b/arch/arm/cpu/armv7/omap5/Makefile index 9b261c4..49c454c 100644 > --- a/arch/arm/cpu/armv7/omap5/Makefile +++ > b/arch/arm/cpu/armv7/omap5/Makefile @@ -29,6 +29,7 @@ COBJS += > hwinit.o COBJS += clocks.o COBJS += emif.o COBJS += sdram.o > +COBJS > += cache-cp15.o > > SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) OBJS := $(addprefix > $(obj),$(COBJS) $(SOBJS)) diff --git > a/arch/arm/cpu/armv7/omap5/cache-cp15.c > b/arch/arm/cpu/armv7/omap5/cache-cp15.c new file mode 100644 index > 0000000..6ff4548 --- /dev/null +++ > b/arch/arm/cpu/armv7/omap5/cache-cp15.c @@ -0,0 +1,46 @@ +/* + * > (C) Copyright 2002 + * Wolfgang Denk, DENX Software Engineering, > w...@denx.de. + * + * (C) Copyright 2012 + * Vincent Stehlé, Texas > Instruments, v-ste...@ti.com. + * + * 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> + +/* OMAP5 specific > function to set up the identity mapping. */ +void > arm_setup_identity_mapping(u32 *page_table) +{ + extern void > __arm_setup_identity_mapping(u32 *page_table);
Lets put the extern in arch/arm/include/asm/cache.h and make both files #include <asm/cache.h>. Thanks! - -- Tom -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://www.enigmail.net/ iQIcBAEBAgAGBQJQx1SdAAoJENk4IS6UOR1WmRkQAIfaVp9YOcBPiGmKNDNTBpXL ol4psfAEEg0OGOZdzX4lIW2+NjzLtzzcwx8s8luEt4YMtaSkPlJ+Sf5eQ1Fd9KpG xBteU5PLWqE9mtTRBHylKrwqjysyuypFHfWpU4tiwLWygGI+eybRb0hrRKEplop6 BYjAOhJ8i4J5NYxQucFkLFeCTR7WAFQsxQ58rfDg/7KkVYcK71j+tZs6SmPijhIw oJoGsWnpsljC/4mbTs189Y391CKmYcSNxgRtGc6fU9NJQFJ2Vx8Ajazhasvtl8sU 7yOrxR8ssFhXSSD2/PdcKUi/VHrX/mVXTV9uk4B9ImsQt5e5Jr3c8XTnw+hLdBzz WMBpQNNPxEMibhYn3UZpskWfxR+1T1kCNbq+lVB6KVCboy98/3Bhu8OWGCLUWRk5 IB/LUfrf4uWjO5pA9hHlmzM0ckjLbQd27zGtof1qwB6EsOefL+x83XR4azqHW6Pq 6Iw+RdX7G+KKvJEqHux/fHvxrSqUzSUQJH4Bk6GYVeSNno+XfIAzNSfMfGv94zvN HMrL9AQIhxfl+2+D1siEXG5YHw4COgNhcz55DYMZK9/1HvQ6QWW5WmT/+Ty1+DfB WKX9ZLksdVl9dPgHtxlfaqWIVc2GrbwUgEzdZHVbdzsDfecNFDxxypBXU7U693KW AC/XcVMEiN1rGRL0cRFt =giVG -----END PGP SIGNATURE----- _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot