Marek Vasut 77b0e2239a ARM: mxs: Setup stack in JTAG mode ... In case the MX23/MX28 is switched into JTAG mode via the BootMode select switches, the BootROM bypasses the CPU core registers initialization. This in turn means that the Stack Pointer (SP) register is not set as it is in every other mode of operation, but instead is only zeroed out. To prevent U-Boot SPL from crashing in this obscure JTAG mode, configure the SP to point at the CONFIG_SYS_INIT_SP_ADDR if the SP is zeroed out. Note that in case the SP is already configured, we must preserve that exact SP value and must not modify it. This is important since in every other mode but the JTAG mode, the SPL returns into the BootROM and BootROM in turn loads U-Boot itself. If the SP were to be corrupted, the BootROM won't be able to continue it's operation after returned from SPL and the system would crash. Finally, add the JTAG mode switch identifier, so it's not recognised as Unknown mode. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Stefano Babic <sbabic@denx.de> Cc: Fabio Estevam <fabio.estevam@freescale.com> Cc: Otavio Salvador <otavio@ossystems.com.br>		2013-10-17 09:44:20 +02:00
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armada100	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
at91	Coding Style cleanup: remove trailing white space	2013-10-14 16:06:53 -04:00
davinci	Coding Style cleanup: remove trailing white space	2013-10-14 16:06:53 -04:00
kirkwood	Cosmetic: Fix a number of typos, no functional changes.	2013-09-20 10:30:54 -04:00
lpc32xx	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
mb86r0x	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
mx25	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
mx27	mx27: add missing constant for mx27	2013-09-10 19:12:55 +02:00
mxs	ARM: mxs: Setup stack in JTAG mode	2013-10-17 09:44:20 +02:00
nomadik	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
omap	Coding Style cleanup: remove trailing white space	2013-10-14 16:06:53 -04:00
orion5x	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
pantheon	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
spear	Coding Style cleanup: remove trailing white space	2013-10-14 16:06:53 -04:00
versatile	Coding Style cleanup: remove trailing white space	2013-10-14 16:06:53 -04:00
cache.c	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
config.mk	ARM: refactor compiler options in config.mk	2013-09-23 17:03:05 +02:00
cpu.c	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
Makefile	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00
start.S	Add GPL-2.0+ SPDX-License-Identifier to source files	2013-07-24 09:44:38 -04:00