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/* int ucl_nrv2e_decompress_8(const unsigned char *src, unsigned char *dst,
unsigned long *dst_len) */
.text
.global ucl_nrv2e_decompress_8
/* Vectors */
ldr pc, =start
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
/* These values are filled in by mkamsboot - don't move them from offset 0x20 */
ucl_unpack: .word 0 /* Entry point (plus 1 - for thumb) of ucl_unpack after copy*/
ucl_start: .word 0 /* Start of the ucl-compressed OF image after copy */
ucl_size: .word 0 /* Length in bytes of the compressed OF image */
copy_start: .word 0 /* Start of the copy of the ucl_unpack function */
copy_size: .word 0 /* uclunpack_size + ucl_paddedsize */
start:
/* A delay loop - just to prove we're running */
mov r1, #0x500000 /* Approximately 5 seconds */
loop: subs r1, r1, #1
bne loop
/* First copy the compressed firmware to unused RAM */
ldr r0, copy_start /* Source */
ldr r1, copy_size /* Source length */
mov r2, #0x40000 /* Destination end */
sub r2, r2, r1
memcpy:
ldrb r3, [r0], #1
strb r3, [r2], #1
cmp r2, #0x40000 /* Stop when we reached dest_end */
bne memcpy
/* Call the ucl decompress function, which will branch to 0x0 */
/* on completion */
ldr r0, ucl_start /* Address of compressed image */
ldr r1, ucl_size /* Compressed size */
mov r2, #0 /* Destination */
ldr r3, ucl_unpack
bx r3
/* never reached */
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