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author | Pali Rohár <pali.rohar@gmail.com> | 2013-09-18 19:43:56 (GMT) |
---|---|---|
committer | Tony Lindgren <tony@atomide.com> | 2013-10-08 18:57:04 (GMT) |
commit | 4748a7240284b0f68bd47a66365c2cd561939830 (patch) | |
tree | afcfc03b29c7aa47fd48acfac02a770bc676d871 /arch/arm/mach-omap2/board-rx51.c | |
parent | a33f1788192d13165594f8ec6975dbae34502ec9 (diff) | |
download | linux-4748a7240284b0f68bd47a66365c2cd561939830.tar.xz |
ARM: OMAP3: RX-51: ARM errata 430973 workaround
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 secure support code and sets IBE bit in ACTLR
during board init code for ARM errata 430973 workaround.
Note that new function rx51_secure_dispatcher() differs from existing
omap_secure_dispatcher(). It calling omap_smc3() and param[0] is nargs+1.
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@abv.bg>
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/mach-omap2/board-rx51.c')
-rw-r--r-- | arch/arm/mach-omap2/board-rx51.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/board-rx51.c b/arch/arm/mach-omap2/board-rx51.c index 773510556..db168c9 100644 --- a/arch/arm/mach-omap2/board-rx51.c +++ b/arch/arm/mach-omap2/board-rx51.c @@ -2,6 +2,8 @@ * Board support file for Nokia N900 (aka RX-51). * * Copyright (C) 2007, 2008 Nokia + * Copyright (C) 2012 Ivaylo Dimitrov <freemangordon@abv.bg> + * Copyright (C) 2013 Pali Rohár <pali.rohar@gmail.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -31,7 +33,9 @@ #include "mux.h" #include "gpmc.h" #include "pm.h" +#include "soc.h" #include "sdram-nokia.h" +#include "omap-secure.h" #define RX51_GPIO_SLEEP_IND 162 @@ -103,6 +107,14 @@ static void __init rx51_init(void) usb_musb_init(&musb_board_data); rx51_peripherals_init(); + if (omap_type() == OMAP2_DEVICE_TYPE_SEC) { +#ifdef CONFIG_ARM_ERRATA_430973 + pr_info("RX-51: Enabling ARM errata 430973 workaround\n"); + /* set IBE to 1 */ + rx51_secure_update_aux_cr(BIT(6), 0); +#endif + } + /* Ensure SDRC pins are mux'd for self-refresh */ omap_mux_init_signal("sdrc_cke0", OMAP_PIN_OUTPUT); omap_mux_init_signal("sdrc_cke1", OMAP_PIN_OUTPUT); |