nand_opt.s

来自「6410BSP3」· S 代码 · 共 48 行

        INCLUDE    kxarm.h
            INCLUDE    s3c6410.inc

        TEXTAREA

;/////////////////////////////////////////////////////
;//
;//    void _Read_512Byte(unsigned char *pBuf)
;//
;//    Read 512 bytes (1 Sector) word-alined buffer
;//    Buffer (r0) must be word-aligned
;//
;/////////////////////////////////////////////////////

        LEAF_ENTRY  _Read_512Byte

        stmfd    sp!, {r1 - r11}

        ldr        r1, =NFDATA         ; NFDATA
        mov        r2, #512            ; 512 byte count
1
        ldr        r4, [r1]            ; Load 1st word
        ldr        r5, [r1]            ; Load 2nd word
        ldr        r6, [r1]            ; Load 3rd word
        ldr        r7, [r1]            ; Load 4th word
        ldr        r8, [r1]            ; Load 5th word
        ldr        r9, [r1]            ; Load 6th word
        ldr        r10,[r1]            ; Load 7th word
        ldr        r11,[r1]            ; Load 8th word
        stmia    r0!,  {r4 - r11}    ; Store 8 words (32 byte)

        subs        r2, r2, #32
        bne        %B1

        ldmfd    sp!,  {r1 - r11}

    IF Interworking :LOR: Thumbing
        bx        lr                ; Return with Thumb mode
    ELSE
        mov        pc, lr            ; Return
    ENDIF

        ENTRY_END

        END