2 # Copyright (c) 2006 Martin Decky
5 # Redistribution and use in source and binary forms, with or without
6 # modification, are permitted provided that the following conditions
9 # - Redistributions of source code must retain the above copyright
10 # notice, this list of conditions and the following disclaimer.
11 # - Redistributions in binary form must reproduce the above copyright
12 # notice, this list of conditions and the following disclaimer in the
13 # documentation and/or other materials provided with the distribution.
14 # - The name of the author may not be used to endorse or promote products
15 # derived from this software without specific prior written permission.
17 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include <arch/asm/regname.h>
30 #include <arch/mm/page.h>
32 .section K_UNMAPPED_TEXT_START, "ax"
36 # save R12 in SPRG1, backup CR in R12
43 # check whether SP is in kernel
48 # stack is in user-space
120 .global exc_system_reset
128 .global exc_machine_check
136 .global exc_data_storage
152 .global exc_instruction_storage
153 exc_instruction_storage:
176 .global exc_alignment
192 .global exc_fp_unavailable
200 .global exc_decrementer
208 .global exc_reserved0
216 .global exc_reserved1
228 b jump_to_kernel_syscall
241 addi r12, r12, iret@l
244 lis r12, exc_dispatch@ha
245 addi r12, r12, exc_dispatch@l
249 ori r12, r12, (msr_ir | msr_dr)@l
258 jump_to_kernel_syscall:
259 lis r12, syscall_handler@ha
260 addi r12, r12, syscall_handler@l
263 lis r12, iret_syscall@ha
264 addi r12, r12, iret_syscall@l
268 ori r12, r12, (msr_ir | msr_dr)@l