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implement __user_initial_stackheap

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aozima 2015-06-04 12:23:24 +08:00
parent be76b10be6
commit 314379cc77
1 changed files with 33 additions and 0 deletions
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33
libcpu/arm/arm926/start_rvds.S
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@ -93,6 +93,12 @@ SYS_STACK_START
EXPORT SVC_STACK_START
SVC_STACK_START
Stack_Top
__initial_sp
__heap_base
Heap_Mem SPACE Heap_Size
__heap_limit
PRESERVE8
;--------------Jump vector table------------------------------------------------
EXPORT Entry_Point
@ -292,4 +298,31 @@ rt_hw_context_switch_interrupt_do PROC
LDMFD SP!, {R0-R12,LR,PC}^ ; pop new task's R0-R12,LR & PC SPSR to CPSR
ENDP
;*******************************************************************************
; User Stack and Heap initialization
;*******************************************************************************
IF :DEF:__MICROLIB
EXPORT __initial_sp
EXPORT __heap_base
EXPORT __heap_limit
ELSE
IMPORT __use_two_region_memory
EXPORT __user_initial_stackheap
__user_initial_stackheap
LDR R0, = Heap_Mem ; heap base
LDR R1, = SVC_STACK_START ; stack base (top-address)
LDR R2, = (Heap_Mem + Heap_Size) ; heap limit
LDR R3, = (SVC_STACK_START - SVC_STK_SIZE) ; stack limit (low-address)
BX LR
ALIGN
ENDIF
END