2 * LatticeMico32 C startup code.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 /* Exception handlers - Must be 32 bytes long. */
27 .section .text, "ax", @progbits
33 mvhi r1, hi(_reset_handler)
34 ori r1, r1, lo(_reset_handler)
41 bi _breakpoint_handler
50 _instruction_bus_error_handler:
51 bi _instruction_bus_error_handler
70 _data_bus_error_handler:
71 bi _data_bus_error_handler
80 _divide_by_zero_handler:
81 bi _divide_by_zero_handler
94 bi .restore_all_and_eret
108 /* padding to align to a 32-bit boundary */
113 /* Setup stack and global pointer */
115 ori sp, sp, lo(_fstack)
121 ori r1, r1, lo(_fbss)
123 ori r3, r3, lo(_ebss)
147 /* ra needs to be moved from initial stack location */
152 .restore_all_and_eret: