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# Copyright (c) 2006 Martin Decky
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# - Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# - Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# - The name of the author may not be used to endorse or promote products
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# derived from this software without specific prior written permission.
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <arch/asm/regname.h>
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#include <arch/mm/page.h>
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.section K_UNMAPPED_TEXT_START, "ax"
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# save R12 in SPRG1, backup CR in R12
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# check whether SP is in kernel
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# stack is in user-space
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.global exc_system_reset
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.global exc_machine_check
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.global exc_data_storage
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.global exc_instruction_storage
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exc_instruction_storage:
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b instruction_storage
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.global exc_alignment
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.global exc_fp_unavailable
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.global exc_decrementer
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.global exc_reserved0
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.global exc_reserved1
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b jump_to_kernel_syscall
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.global exc_itlb_miss
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.global exc_dtlb_miss_load
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.global exc_dtlb_miss_store
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addi r12, r12, iret@l
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lis r12, exc_dispatch@ha
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addi r12, r12, exc_dispatch@l
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ori r12, r12, (msr_ir | msr_dr)@l
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jump_to_kernel_syscall:
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lis r12, syscall_handler@ha
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addi r12, r12, syscall_handler@l
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lis r12, iret_syscall@ha
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addi r12, r12, iret_syscall@l
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ori r12, r12, (msr_ir | msr_dr)@l