EB632 datasheet(94/112 Pages) FREESCALE

94 / 112 page

Functional Differences Between MSC8101 (Mask 2K42A) and MSC8103 (Mask 2K87M), Rev. 2

Freescale Semiconductor

Bootloader Program

find_siubase

;read IMMR using siureg1

move.l #$00f8ffc0,r7;move Address of IMMR (using siureg1) into d9

nop

move.l (r7),d1;read IMMR into d1

nop

extractu #$20,#0,d1,d1;remove the extend bits

nop

and #$ffff0000,d1,d1;Leave only ISB bits on IMMR

move.l d1,d9

;Added for serial boot

;d9 gets the IMMR value

inc.f d1

; d1+$10000->d1

jmp return_find_siu

sram_init

move.l d1,r6

move.l #$00000200,d1; base address for bank 10

move.l #$00000100,d2; delta/2

imac d2,d3,d1; (d1+d3.l*d2.l)->d1

aslw d1,d1

; d1<<16

move.l #$01f00000,d0; offset 2 (for bank 11)

aslw d3,d2

; multiply d3 by 0x10,000

add d2,d0,d0

move.l d1,r5 ;

bmset #$00c1,d1.l

move.l #$fff80000,d7

move.l d7,(r6+$154); SET OR10

move.l d1,(r6+$150); SET BR10

; gpcm_init

move.l #$ffff0000,d1; SET OR11 MASK 64 KB

bmset #$0021,d0.l; changed the machine select to gpcm.

move.l d1,(r6+$15c); SET OR11 MASK 64 KB

move.l d0,(r6+$158); SET BR11 TO $01f0_0000

jmp return_sram_init

upmc_init

; -------------- READ SINGLE -------------------------------------

move.l #$90051240,d7

move.l d7,(r6+$178) ;

move.l #$00030040,d7

move.l d7,(r6+$188) ;

cmpeq.w #$2,d3

jf continue_upmc1

move.w #$0,(r5) ;

move.l #$00030040,d7

move.l d7,(r6+$188) ;

continue_upmc1

move.w #$0,(r5) ;

move.l #$00030045,d7

move.l d7,(r6+$188) ;

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