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core: setup stack when running core on T1

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This commit is contained in:
Ondrej Mikle 2020-05-14 12:46:25 +02:00
parent fb5a220b46
commit c4c341b3f9
1 changed files with 8 additions and 0 deletions
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8
core/embed/firmware/startup.s
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@ -5,6 +5,14 @@
.global reset_handler .global reset_handler
.type reset_handler, STT_FUNC .type reset_handler, STT_FUNC
reset_handler: reset_handler:
#if TREZOR_MODEL == 1
ldr r0, =_estack - 8 // r0 = stack pointer, T1 bootloader had 8 bytes reserved at end
msr msp, r0 // set stack pointer
dsb
isb
#endif
// setup environment for subsequent stage of code // setup environment for subsequent stage of code
ldr r0, =ccmram_start // r0 - point to beginning of CCMRAM ldr r0, =ccmram_start // r0 - point to beginning of CCMRAM
ldr r1, =ccmram_end // r1 - point to byte after the end of CCMRAM ldr r1, =ccmram_end // r1 - point to byte after the end of CCMRAM