AN3324 datasheet(30/37 Pages) STMICROELECTRONICS

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AN3324

CPU core initialization

Doc ID 18311 Rev 2

30/37

Finally user must set stack and small data area pointers.

;------- Reset Configuration Half Word -------------------------------------

.if __ghs__

.section .rcw

.else

.section

.rcw,,c

.endif

reset_vector:

.LONG 0x015A0000

# SPC56ELX - e200 Core Watchdog OFF, External Boot OFF,

VLE ON

.LONG _start

# Code starts at _start

;---------------------------------------------------------------------------

.if __ghs__

; GHS declarations

.section .vletext_init, va

.vle

.global__ghs_board_memory_init

.else

; WindRiver declarations

.section .vletext_init,4,c

.endif

.global_start

.align2

e_add2i.r0,0# Debuggers may object to starting at 0.

_start:

##--------- SET UP MMU (BEGIN)--------------------------------------------

#table 0

e_lis r5, 0x10000000@ha

e_add16i r5, r5, 0x10000000@l

mtspr mas0,r5

# mtspr MAS0,r5

e_lis r5, 0xC0000500@ha

e_add16i r5, r5, 0xC0000500@l

mtspr mas1,r5# mtspr MAS1,r5

e_lis r5, 0x00000028@ha

e_add16i r5, r5, 0x00000028@l

mtspr mas2,r5

# mtspr MAS2,r5

e_lis r5, 0x0000003F@ha

e_add16i r5, r5, 0x0000003F@l

mtspr mas3,r5

# mtspr MAS3,r5

tlbwe

# Write the entry to the TLB

#table 1

....

mtspr mas3,r5

# mtspr MAS3,r5

tlbwe

# Write the entry to the TLB

#table 2

....

tlbwe

# Write the entry to the TLB

#table 3

....

mtspr mas3,r5

# mtspr MAS3,r5

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