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arm/lib/bootm.c: keep ARM v7M in thumb mode during boot_jump_linux()

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

Tested on STM32f746-disco board

Similar commit:
f99993c108
Author: Matt Porter <mporter@konsulko.com>

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
This commit is contained in:
Patrice Chotard 2017-04-25 11:07:46 +02:00 committed by Tom Rini
parent a93fbf4a78
commit dc89c6fb77
1 changed files with 4 additions and 1 deletions
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5
arch/arm/lib/bootm.c
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@ -356,7 +356,10 @@ static void boot_jump_linux(bootm_headers_t *images, int flag)
int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
kernel_entry = (void (*)(int, int, uint))images->ep;
#ifdef CONFIG_CPU_V7M
ulong addr = (ulong)kernel_entry | 1;
kernel_entry = (void *)addr;
#endif
s = getenv("machid");
if (s) {
if (strict_strtoul(s, 16, &machid) < 0) {