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spl: armv7m: keep ARM v7M in thumb mode while jumping to entry point

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On ARM v7M, the processor will return to ARM mode when executing blx
instruction with bit 0 of the address == 0. Always set it to 1 to stay
in thumb mode.

Similar commit:
f99993c108
Author: Matt Porter <mporter@konsulko.com>
Date:   Tue May 5 15:00:23 2015 -0400
common/cmd_boot: keep ARM v7M in thumb mode during do_go_exec()

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
This commit is contained in:
Vikas Manocha 2017-03-31 16:34:39 -07:00 committed by Tom Rini
parent 52609d753b
commit 634fcf0848
1 changed files with 3 additions and 0 deletions
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3
common/spl/spl.c
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@ -85,6 +85,9 @@ void spl_set_header_raw_uboot(struct spl_image_info *spl_image)
{
spl_image->size = CONFIG_SYS_MONITOR_LEN;
spl_image->entry_point = CONFIG_SYS_UBOOT_START;
#ifdef CONFIG_CPU_V7M
spl_image->entry_point |= 0x1;
#endif
spl_image->load_addr = CONFIG_SYS_TEXT_BASE;
spl_image->os = IH_OS_U_BOOT;
spl_image->name = "U-Boot";