- /* copy data section to ram, size must be 4-byte aligned */
- movl $_i386boot_romdata_dest, %edi /* destination address */
- movl $_i386boot_romdata_start, %esi /* source address */
- movl $_i386boot_romdata_size, %ecx /* number of bytes to copy */
- movl %ecx, %eax
- andl $3, %eax
- jnz data_fail
-
- shrl $2, %ecx /* copy 4 byte each time */
- cld
- cmpl $0, %ecx
- je data_ok
-data_segment:
- movsl
- loop data_segment
- jmp data_ok
-data_fail:
- /* indicate (lack of) progress */
- movw $0x83, %ax
- movl $.progress2a, %ebp
- jmp show_boot_progress
-.progress2a:
- jmp die
-
-data_ok:
-
- /* indicate progress */
- movw $0x04, %ax
- movl $.progress3, %ebp
- jmp show_boot_progress
-.progress3:
-
- /* clear bss section in ram, size must be 4-byte aligned */
- movl $_i386boot_bss_start, %edi /* MK_CHG BSS start */
- movl $_i386boot_bss_size, %ecx /* BSS size */
- movl %ecx, %eax
- andl $3, %eax
- jnz bss_fail
- shrl $2, %ecx /* clear 4 byte each time */
- cld
- cmpl $0, %ecx
- je bss_ok
-bss:
- movl $0, (%edi)
- add $4, %edi
- loop bss
- jmp bss_ok
-
-bss_fail:
- /* indicate (lack of) progress */
- movw $0x84, %ax
- movl $.progress3a, %ebp
- jmp show_boot_progress
-.progress3a:
- jmp die
-
-bss_ok:
-