boot.asm

该程序是ti的c6713dsp的引导程序。该程序在使用的过程中经过验证过的。大家如果要在自己的系统中使用

        .title  "Flash bootup utility for 6211 dsk"
        .option D,T
        .length 102
        .width  140
     

PAGE_SIZE	  .equ    0x80	    ;flash page size in byte
BOOT_SIZE     .equ    0x400       ;bootup code size in byte
FLASH_START   .equ    0x90000000  ;flash start address
BOOT_START    .equ    0x00000000  ;L2 sram start address

CODE_SIZE     .equ    0xF800      ;application code size in byte
CODE_START    .equ    0x400       ;application code start address

FLASH_REG1    .equ    0x90005555  ;address of the flash control reg 1
FLASH_REG2    .equ    0x90002AAA  ;address of the flash control reg 2
FLASH_KEY1    .equ    0xAA
FLASH_KEY2    .equ    0x55
FLASH_KEY3    .equ    0xA0
IO_PORT       .equ    0x90080000  ;address of I/O port, only top byte has valid data 
EMIF_GCR 	  .equ    0x01800000  ;EMIF global control     
EMIF_CE1      .equ    0x01800004  ;address of EMIF CE1 control reg. 
EMIF_CE0      .equ    0x01800008  ;EMIF CE0control  
EMIF_CE2      .equ    0x01800010
EMIF_CE3      .equ    0x01800014        
EMIF_SDCTRL   .equ    0x01800018  ;EMIF SDRAM control     
EMIF_SDRP     .equ    0x0180001c  ;EMIF SDRM refresh period
EMIF_SDEXT    .equ    0x01800020 
EMIF_CE1_8    .equ    0xffffff03  ;
EMIF_CE1_32   .equ    0xffffff23  ;
EMIF_CE0_V    .equ    0x00000030  ;EMIF CE0control   ;0x30
EMIF_CE2_V    .equ    0x20d20321
EMIF_CE3_V    .equ    0x20d10522 
EMIF_SDRP_V   .equ    0x0000061a
EMIF_SDEXT_V  .equ    0x00054509
EMIF_SDCTRL_V .equ    0x57116000  ;EMIF SDRAM control ;0x73380000    



 .sect ".boot_load" 
 .global _boot
 .ref _c_int00
 
_boot:
            mvkl  EMIF_GCR,A4    ;EMIF_GCR address ->A4
      ||    mvkl  0x3300,B4      

            mvkh  EMIF_GCR,A4
      ||    mvkh  0x3300,B4  
                            
            stw   B4,*A4                

            mvkl  EMIF_CE0,A4       ;EMIF_CE0 address ->A4
      ||    mvkl  EMIF_CE0_V,B4     ;

            mvkh  EMIF_CE0,A4
      ||    mvkh  EMIF_CE0_V,B4
      
            stw   B4,*A4
      ||    mvkl  EMIF_CE1,A4       ;EMIF_CE0 address ->A4
      ||    mvkl  EMIF_CE1_8,B4     ;

            mvkh  EMIF_CE1,A4
      ||    mvkh  EMIF_CE1_8,B4
      
            stw   B4,*A4                
      ||    mvkl  EMIF_SDCTRL,A4    ;EMIF_SDCTRL address ->A4
      ||    mvkl  EMIF_SDCTRL_V,B4     ;

            mvkh  EMIF_SDCTRL,A4
      ||    mvkh  EMIF_SDCTRL_V,B4     
      
            stw   B4,*A4                
      ||    mvkl  EMIF_SDRP,A4      ;EMIF_SDRP address ->A4
      ||    mvkl  0x61a,B4    ;

            mvkh  EMIF_SDRP,A4
      ||    mvkh  0x61a,B4
            
            stw   B4,*A4
      ||    mvkl  EMIF_SDEXT,A4    ;EMIF_SDCTRL address ->A4
      ||    mvkl  EMIF_SDEXT_V,B4     ;

            mvkh  EMIF_SDEXT,A4
      ||    mvkh  EMIF_SDEXT_V,B4     

            stw   B4,*A4
      ||    mvkl  EMIF_CE2,A4    ;EMIF_SDCTRL address ->A4
      ||    mvkl  EMIF_CE2_V,B4     ;

            mvkh  EMIF_CE2,A4
      ||    mvkh  EMIF_CE2_V,B4
      
            stw   B4,*A4
      ||    mvkl  EMIF_CE3,A4    ;EMIF_SDCTRL address ->A4
      ||    mvkl  EMIF_CE3_V,B4     ;

            mvkh  EMIF_CE3,A4
      ||    mvkh  EMIF_CE3_V,B4 
            
            stw   B4,*A4     
                            
            mvkl  BOOT_START+1024,A4 ;ram start address ->A4
      ||    mvkl  FLASH_START+1024,B4 ;flash start address ->B4

            mvkh  BOOT_START+1024,A4
      ||    mvkh  FLASH_START+1024,B4   
       

            zero  A1
_boot_loop1:
            ldb   *B4++,B5
            mvkl  0x670c,B6 ;(0x11000-0x400)=0x10C00=68608

            add   1,A1,A1          ;A1+=1,inc outer counter
      ||    mvkh  0x670c,B6
       
            cmplt A1,B6,B0
            nop   
            stb   B5,*A4++
      [B0]  b     _boot_loop1
            nop   5


           ; mvkl .S2 _exit_boot, B0
           ; mvkh .S2 _exit_boot, B0
           ; B    .S2 B0
           ; nop   5
            



 

            mvkl  0x0000a400,A4 ;apps code start address ->A4
            mvkh  0x0000a400,A4
            mvkl  0x90010400,B4
            mvkh  0x90010400,B4
     ;       mvkl  0x9000cc0c,B4
     ;       mvkh  0x9000cc0c,B4
            zero  A1
 
_boot_loop2:
            ldb   *B4++,B5
            mvkl  0x00006000,B6 ;B6 = BOOT_SIZE -1024

            add   1,A1,A1          ;A1+=1,inc outer counter
      ||    mvkh  0x00006000,B6
       
            cmplt  A1,B6,B0
            nop    
            stb   B5,*A4++
      [B0]  b     _boot_loop2           
            nop   5                        
                        
                                   
;_exit_boot:  nop        
;            nop 5
            mvkl .S2 _c_int00, B0
            mvkh .S2 _c_int00, B0
            B    .S2 B0
            nop   5
; 
; end of the bootup routine
            .end