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ChibiOS
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git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1785 35acf78f-673a-0410-8e92-d51de3d6d3f4

This commit is contained in:
gdisirio 2010-03-26 15:16:48 +00:00
parent a6c627641e
commit 63b88a2147
1 changed files with 16 additions and 5 deletions
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21
os/ports/GCC/ARMCMx/crt0.s
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@ -45,7 +45,9 @@
.global ResetHandler .global ResetHandler
.weak ResetHandler .weak ResetHandler
ResetHandler: ResetHandler:
/* Interrupts globally masked. */ /*
* Interrupts are globally masked initially.
*/
cpsid i cpsid i
/* /*
* Stack pointers initialization. * Stack pointers initialization.
@ -53,9 +55,14 @@ ResetHandler:
ldr r0, =__ram_end__ ldr r0, =__ram_end__
ldr r1, =__main_stack_size__ ldr r1, =__main_stack_size__
subs r0, r0, r1 subs r0, r0, r1
/* { r0 = main stack low address } */ /*
* Note that r0 is the main stack low boundary address and process
* stack initial top address.
*/
msr PSP, r0 msr PSP, r0
/* Early initialization. */ /*
* Early initialization phase, it is empty by default.
*/
bl hwinit0 bl hwinit0
/* /*
* Data initialization. * Data initialization.
@ -100,11 +107,15 @@ endbloop:
strlo r0, [r1], #4 strlo r0, [r1], #4
blo bloop blo bloop
#endif #endif
/* Switches to the Process Stack. */ /*
* Switches to the Process Stack and uses a barrier just to be safe.
*/
movs r0, #CONTROL_MODE_PRIVILEGED | CONTROL_USE_PSP movs r0, #CONTROL_MODE_PRIVILEGED | CONTROL_USE_PSP
msr CONTROL, r0 msr CONTROL, r0
isb isb
/* Late initialization. */ /*
* Late initialization phase, it is empty by default.
*/
bl hwinit1 bl hwinit1
movs r0, #0 movs r0, #0
mov r1, r0 mov r1, r0