179 lines
7.3 KiB
ArmAsm
179 lines
7.3 KiB
ArmAsm
/*
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Copyright 2020 Shenzhen Academy of Aerospace Technology
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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Change Logs:
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Date Author Notes
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2020-10-16 Dystopia the first version
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*/
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#define TRAPL(H) mov %g0, %l0; sethi %hi(H), %l4; jmp %l4 + %lo(H); nop;
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#define TRAP(H) mov %psr, %l0; sethi %hi(H), %l4; jmp %l4 + %lo(H); nop;
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#define TRAP_ENTRY(H) mov %psr, %l0; sethi %hi(H), %l4; jmp %l4 + %lo(H); mov %tbr, %l3;
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#define BAD_TRAP ta 0; nop; nop; nop;
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#define SOFT_TRAP BAD_TRAP
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#define NWINDOWS 8
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.section .vectors, "ax"
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.globl _ISR_Handler
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.globl _window_overflow
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.globl _window_underflow
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.globl _reset
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.globl _context_switch
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.globl system_vectors
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system_vectors:
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TRAPL(_reset); ! 00 reset trap
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BAD_TRAP; ! 01 instruction_access_exception
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BAD_TRAP; ! 02 illegal_instruction
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BAD_TRAP; ! 03 priveleged_instruction
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BAD_TRAP;
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TRAP(_window_overflow); ! 05 window_overflow
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TRAP(_window_underflow); ! 06 window_underflow
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BAD_TRAP; ! 07 memory_add0ress_not_aligned
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BAD_TRAP; ! 08 fp_exception
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BAD_TRAP; ! 09 data_access_exception
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BAD_TRAP; ! 0A tag_overflow
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BAD_TRAP; ! 0B undefined
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BAD_TRAP; ! 0C undefined
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BAD_TRAP; ! 0D undefined
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BAD_TRAP; ! 0E undefined
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BAD_TRAP; ! 0F undefined
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BAD_TRAP; ! 10 undefined
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/* Interrupt entries */
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TRAP_ENTRY(_ISR_Handler) ! 11 interrupt level 1
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TRAP_ENTRY(_ISR_Handler) ! 12 interrupt level 2
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TRAP_ENTRY(_ISR_Handler) ! 13 interrupt level 3
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TRAP_ENTRY(_ISR_Handler) ! 14 interrupt level 4
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TRAP_ENTRY(_ISR_Handler) ! 15 interrupt level 5
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TRAP_ENTRY(_ISR_Handler) ! 16 interrupt level 6
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TRAP_ENTRY(_ISR_Handler) ! 17 interrupt level 7
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TRAP_ENTRY(_ISR_Handler) ! 18 interrupt level 8
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TRAP_ENTRY(_ISR_Handler) ! 19 interrupt level 9
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TRAP_ENTRY(_ISR_Handler) ! 1A interrupt level 1
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TRAP_ENTRY(_ISR_Handler) ! 1B interrupt level 11
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TRAP_ENTRY(_ISR_Handler) ! 1C interrupt level 12
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TRAP_ENTRY(_ISR_Handler) ! 1D interrupt level 13
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TRAP_ENTRY(_ISR_Handler) ! 1E interrupt level 14
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TRAP_ENTRY(_ISR_Handler) ! 1F interrupt level 15
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 20 - 23 undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 24 - 27 undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 28 - 2B undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 2C - 2F undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 30 - 33 undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 34 - 37 undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 38 - 3B undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 3C - 3F undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 40 - 43 undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 44 - 47 undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 48 - 4B undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 4C - 4F undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 50 - 53 undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 54 - 57 undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 58 - 5B undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 5C - 5F undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 60 - 63 undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 64 - 67 undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 68 - 6B undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 6C - 6F undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 70 - 73 undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 74 - 77 undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 78 - 7B undefined
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BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 7C - 7F undefined
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/* Software traps */
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SOFT_TRAP; SOFT_TRAP; TRAP_ENTRY(_context_switch); TRAP_ENTRY(_context_switch) ! 80 - 83
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 84 - 87
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 88 - 8B
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 8C - 8F
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 90 - 93
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 94 - 97
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 98 - 9B
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 9C - 9F
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! A0 - A3
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! A4 - A7
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! A8 - AB
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! AC - AF
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! B0 - B3
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! B4 - B7
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! B8 - BB
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! BC - BF
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! C0 - C3
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! C4 - C7
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! C8 - CB
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! CC - CF
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! D0 - D3
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! D4 - D7
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! D8 - DB
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! DC - DF
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! E0 - E3
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! E4 - E7
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! E8 - EB
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! EC - EF
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! F0 - F3
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! F4 - F7
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! F8 - FB
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SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! FC - FF
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_window_overflow:
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mov %wim, %l3 ! Calculate next WIM
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mov %g1, %l7
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srl %l3, 1, %g1
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sll %l3, NWINDOWS - 1, %l4
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or %l4, %g1, %g1
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save ! Get into window to be saved.
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mov %g1, %wim
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nop
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nop
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nop
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std %l0, [%sp + 0]
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std %l2, [%sp + 8]
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std %l4, [%sp + 16]
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std %l6, [%sp + 24]
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std %i0, [%sp + 32]
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std %i2, [%sp + 40]
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std %i4, [%sp + 48]
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std %i6, [%sp + 56]
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restore ! Go back to trap window.
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mov %l7, %g1
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jmp %l1 ! Re-execute save.
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rett %l2
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_window_underflow:
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mov %wim, %l3 ! Calculate next WIM
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sll %l3, 1, %l4
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srl %l3, NWINDOWS - 1, %l5
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or %l5, %l4, %l5
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mov %l5, %wim
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nop
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nop
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nop
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restore ! Two restores to get into the
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restore ! window to restore
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ldd [%sp + 0], %l0 ! Restore window from the stack
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ldd [%sp + 8], %l2
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ldd [%sp + 16], %l4
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ldd [%sp + 24], %l6
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ldd [%sp + 32], %i0
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ldd [%sp + 40], %i2
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ldd [%sp + 48], %i4
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ldd [%sp + 56], %i6
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save ! Get back to the trap window.
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save
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jmp %l1 ! Re-execute restore.
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rett %l2
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