On Sunday 31 March 2013 07:24 PM, Pali Rohár wrote: > Closed and signed Nokia X-Loader bootloader stored in RX-51 nand does not set > IBE bit in ACTLR and starting kernel in non-secure mode. So direct write to > ACTLR by our kernel does not working and the code for ARM errata 430973 in > commit 7ce236fcd6fd45b0441a2d49acb2ceb2de2e8a47 that sets IBE bit is a noop. > > In order to have workaround for ARM errata 430973 from non-secure world on > RX-51 we needs Secure Monitor Call to set IBE BIT in ACTLR. > > This patch adds RX-51 specific SMC support and sets IBE bit in ACTLR during > board init code for ARM errata 430973 workaround. > > Because all the setup and what arguments are required for SMC are completely > different from SoC to SoC it is not possible to create generic SMC handling. > Code in omap-smc.S looks identical but it is not. So RX-51 needs another code. > > ARM errata 430973 workaround is needed for thumb-2 ISA compiled userspace > binaries. Without this workaround thumb-2 binaries crashing. So with this > patch it is possible to recompile and run applications/binaries with thumb-2 > ISA on RX-51. > > Signed-off-by: Ivaylo Dimitrov <freemangordon@xxxxxx> > Signed-off-by: Pali Rohár <pali.rohar@xxxxxxxxx> > --- > arch/arm/mach-omap2/Makefile | 1 + > arch/arm/mach-omap2/board-rx51-secure.c | 66 +++++++++++++++++++++++++++++++ > arch/arm/mach-omap2/board-rx51-secure.h | 36 +++++++++++++++++ > arch/arm/mach-omap2/board-rx51-smc.S | 34 ++++++++++++++++ > arch/arm/mach-omap2/board-rx51.c | 7 ++++ > 5 files changed, 144 insertions(+) > create mode 100644 arch/arm/mach-omap2/board-rx51-secure.c > create mode 100644 arch/arm/mach-omap2/board-rx51-secure.h > create mode 100644 arch/arm/mach-omap2/board-rx51-smc.S > > diff --git a/arch/arm/mach-omap2/board-rx51-smc.S b/arch/arm/mach-omap2/board-rx51-smc.S > new file mode 100644 > index 0000000..70e2eb7 > --- /dev/null > +++ b/arch/arm/mach-omap2/board-rx51-smc.S > @@ -0,0 +1,34 @@ You can avoid creating board-rx51-smc.S by having rx51_ppa_smc() part of board-rx51-secure.c using inline asm. You can avoid the board-rx51-secure.h as well considering the usage is limited to the rx51 board. Regards, Santosh -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
