Das U-Boot: Universal Boot Loader

diff --git a/board/lart/flashasm.S b/board/lart/flashasm.S
new file mode 100644 (file)
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