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| -rw-r--r-- | board/lart/flashasm.S | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/board/lart/flashasm.S b/board/lart/flashasm.S new file mode 100644 index 0000000..9021972 --- /dev/null +++ b/board/lart/flashasm.S @@ -0,0 +1,177 @@ +/* + * flashasm.S: flash magic for LART + * + * Copyright (C) 1999 2000 2001 Jan-Derk bakker (J.D.Bakker@its.tudelft.nl) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +.text + + +.globl data_to_flash +.globl data_from_flash + /* Subroutine that takes data in r0 and formats it so it will be in */ + /* the correct order for the internal flash */ + /* used for LART only */ +data_to_flash: + mov r1, #0x0 + + tst r0, #0x00000001 + orrne r1, r1, #0x00001000 + tst r0, #0x00000002 + orrne r1, r1, #0x00004000 + tst r0, #0x00000004 + orrne r1, r1, #0x00000800 + tst r0, #0x00000008 + orrne r1, r1, #0x00000200 + tst r0, #0x00000010 + orrne r1, r1, #0x00000001 + tst r0, #0x00000020 + orrne r1, r1, #0x00000004 + tst r0, #0x00000040 + orrne r1, r1, #0x00000080 + tst r0, #0x00000080 + orrne r1, r1, #0x00000020 + + tst r0, #0x00000100 + orrne r1, r1, #0x00002000 + tst r0, #0x00000200 + orrne r1, r1, #0x00008000 + tst r0, #0x00000400 + orrne r1, r1, #0x00000400 + tst r0, #0x00000800 + orrne r1, r1, #0x00000100 + tst r0, #0x00001000 + orrne r1, r1, #0x00000002 + tst r0, #0x00002000 + orrne r1, r1, #0x00000008 + tst r0, #0x00004000 + orrne r1, r1, #0x00000040 + tst r0, #0x00008000 + orrne r1, r1, #0x00000010 + + tst r0, #0x00010000 + orrne r1, r1, #0x00100000 + tst r0, #0x00020000 + orrne r1, r1, #0x00400000 + tst r0, #0x00040000 + orrne r1, r1, #0x00080000 + tst r0, #0x00080000 + orrne r1, r1, #0x00020000 + tst r0, #0x00100000 + orrne r1, r1, #0x01000000 + tst r0, #0x00200000 + orrne r1, r1, #0x04000000 + tst r0, #0x00400000 + orrne r1, r1, #0x80000000 + tst r0, #0x00800000 + orrne r1, r1, #0x20000000 + + tst r0, #0x01000000 + orrne r1, r1, #0x00200000 + tst r0, #0x02000000 + orrne r1, r1, #0x00800000 + tst r0, #0x04000000 + orrne r1, r1, #0x00040000 + tst r0, #0x08000000 + orrne r1, r1, #0x00010000 + tst r0, #0x10000000 + orrne r1, r1, #0x02000000 + tst r0, #0x20000000 + orrne r1, r1, #0x08000000 + tst r0, #0x40000000 + orrne r1, r1, #0x40000000 + tst r0, #0x80000000 + orrne r1, r1, #0x10000000 + + mov r0, r1 + mov pc, lr + + /* Takes data received from the flash, and unshuffles it. */ +data_from_flash: + mov r1, #0x00 + + tst r0, #0x00000001 + orrne r1, r1, #0x00000010 + tst r0, #0x00000002 + orrne r1, r1, #0x00001000 + tst r0, #0x00000004 + orrne r1, r1, #0x00000020 + tst r0, #0x00000008 + orrne r1, r1, #0x00002000 + tst r0, #0x00000010 + orrne r1, r1, #0x00008000 + tst r0, #0x00000020 + orrne r1, r1, #0x00000080 + tst r0, #0x00000040 + orrne r1, r1, #0x00004000 + tst r0, #0x00000080 + orrne r1, r1, #0x00000040 + + tst r0, #0x00000100 + orrne r1, r1, #0x00000800 + tst r0, #0x00000200 + orrne r1, r1, #0x00000008 + tst r0, #0x00000400 + orrne r1, r1, #0x00000400 + tst r0, #0x00000800 + orrne r1, r1, #0x00000004 + tst r0, #0x00001000 + orrne r1, r1, #0x00000001 + tst r0, #0x00002000 + orrne r1, r1, #0x00000100 + tst r0, #0x00004000 + orrne r1, r1, #0x00000002 + tst r0, #0x00008000 + orrne r1, r1, #0x00000200 + + tst r0, #0x00010000 + orrne r1, r1, #0x08000000 + tst r0, #0x00020000 + orrne r1, r1, #0x00080000 + tst r0, #0x00040000 + orrne r1, r1, #0x04000000 + tst r0, #0x00080000 + orrne r1, r1, #0x00040000 + tst r0, #0x00100000 + orrne r1, r1, #0x00010000 + tst r0, #0x00200000 + orrne r1, r1, #0x01000000 + tst r0, #0x00400000 + orrne r1, r1, #0x00020000 + tst r0, #0x00800000 + orrne r1, r1, #0x02000000 + + tst r0, #0x01000000 + orrne r1, r1, #0x00100000 + tst r0, #0x02000000 + orrne r1, r1, #0x10000000 + tst r0, #0x04000000 + orrne r1, r1, #0x00200000 + tst r0, #0x08000000 + orrne r1, r1, #0x20000000 + tst r0, #0x10000000 + orrne r1, r1, #0x80000000 + tst r0, #0x20000000 + orrne r1, r1, #0x00800000 + tst r0, #0x40000000 + orrne r1, r1, #0x40000000 + tst r0, #0x80000000 + orrne r1, r1, #0x00400000 + + mov r0, r1 + mov pc, lr |