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| author | Dave Chapman <dave@dchapman.com> | 2008-10-04 08:46:03 +0000 |
|---|---|---|
| committer | Dave Chapman <dave@dchapman.com> | 2008-10-04 08:46:03 +0000 |
| commit | c6be818212de133da4a51cebcdfee84c6dbae984 (patch) | |
| tree | e6e321e0c0437d5a937db7c126be2289f30cb874 /rbutil/mkamsboot/test.S | |
| parent | d16fe2d36a0881a1bf4f65b945087a10962ed33a (diff) | |
Move mkamsboot into the rbutil/mkamsboot/ directory - no other changes, so this should still work the same as before.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18706 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'rbutil/mkamsboot/test.S')
| -rw-r--r-- | rbutil/mkamsboot/test.S | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/rbutil/mkamsboot/test.S b/rbutil/mkamsboot/test.S new file mode 100644 index 0000000000..a4757b44ce --- /dev/null +++ b/rbutil/mkamsboot/test.S @@ -0,0 +1,55 @@ +/* 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 */ |