You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
168 lines
6.8 KiB
168 lines
6.8 KiB
/*
|
|
* Copyright (c) 2020, Shenzhen Academy of Aerospace Technology
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2020-10-16 Dystopia the first version
|
|
*/
|
|
|
|
#define TRAPL(H) mov %g0, %l0; sethi %hi(H), %l4; jmp %l4 + %lo(H); nop;
|
|
#define TRAP(H) mov %psr, %l0; sethi %hi(H), %l4; jmp %l4 + %lo(H); nop;
|
|
#define TRAP_ENTRY(H) mov %psr, %l0; sethi %hi(H), %l4; jmp %l4 + %lo(H); mov %tbr, %l3;
|
|
#define BAD_TRAP ta 0; nop; nop; nop;
|
|
#define SOFT_TRAP BAD_TRAP
|
|
#define NWINDOWS 8
|
|
|
|
.section .vectors, "ax"
|
|
|
|
.globl _ISR_Handler
|
|
.globl _window_overflow
|
|
.globl _window_underflow
|
|
.globl _reset
|
|
.globl _context_switch
|
|
|
|
.globl system_vectors
|
|
system_vectors:
|
|
TRAPL(_reset); ! 00 reset trap
|
|
BAD_TRAP; ! 01 instruction_access_exception
|
|
BAD_TRAP; ! 02 illegal_instruction
|
|
BAD_TRAP; ! 03 priveleged_instruction
|
|
BAD_TRAP;
|
|
TRAP(_window_overflow); ! 05 window_overflow
|
|
TRAP(_window_underflow); ! 06 window_underflow
|
|
BAD_TRAP; ! 07 memory_add0ress_not_aligned
|
|
BAD_TRAP; ! 08 fp_exception
|
|
BAD_TRAP; ! 09 data_access_exception
|
|
BAD_TRAP; ! 0A tag_overflow
|
|
BAD_TRAP; ! 0B undefined
|
|
BAD_TRAP; ! 0C undefined
|
|
BAD_TRAP; ! 0D undefined
|
|
BAD_TRAP; ! 0E undefined
|
|
BAD_TRAP; ! 0F undefined
|
|
BAD_TRAP; ! 10 undefined
|
|
|
|
/* Interrupt entries */
|
|
TRAP_ENTRY(_ISR_Handler) ! 11 interrupt level 1
|
|
TRAP_ENTRY(_ISR_Handler) ! 12 interrupt level 2
|
|
TRAP_ENTRY(_ISR_Handler) ! 13 interrupt level 3
|
|
TRAP_ENTRY(_ISR_Handler) ! 14 interrupt level 4
|
|
TRAP_ENTRY(_ISR_Handler) ! 15 interrupt level 5
|
|
TRAP_ENTRY(_ISR_Handler) ! 16 interrupt level 6
|
|
TRAP_ENTRY(_ISR_Handler) ! 17 interrupt level 7
|
|
TRAP_ENTRY(_ISR_Handler) ! 18 interrupt level 8
|
|
TRAP_ENTRY(_ISR_Handler) ! 19 interrupt level 9
|
|
TRAP_ENTRY(_ISR_Handler) ! 1A interrupt level 1
|
|
TRAP_ENTRY(_ISR_Handler) ! 1B interrupt level 11
|
|
TRAP_ENTRY(_ISR_Handler) ! 1C interrupt level 12
|
|
TRAP_ENTRY(_ISR_Handler) ! 1D interrupt level 13
|
|
TRAP_ENTRY(_ISR_Handler) ! 1E interrupt level 14
|
|
TRAP_ENTRY(_ISR_Handler) ! 1F interrupt level 15
|
|
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 20 - 23 undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 24 - 27 undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 28 - 2B undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 2C - 2F undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 30 - 33 undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 34 - 37 undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 38 - 3B undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 3C - 3F undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 40 - 43 undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 44 - 47 undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 48 - 4B undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 4C - 4F undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 50 - 53 undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 54 - 57 undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 58 - 5B undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 5C - 5F undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 60 - 63 undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 64 - 67 undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 68 - 6B undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 6C - 6F undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 70 - 73 undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 74 - 77 undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 78 - 7B undefined
|
|
BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 7C - 7F undefined
|
|
|
|
/* Software traps */
|
|
SOFT_TRAP; SOFT_TRAP; TRAP_ENTRY(_context_switch); TRAP_ENTRY(_context_switch) ! 80 - 83
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 84 - 87
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 88 - 8B
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 8C - 8F
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 90 - 93
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 94 - 97
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 98 - 9B
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! 9C - 9F
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! A0 - A3
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! A4 - A7
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! A8 - AB
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! AC - AF
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! B0 - B3
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! B4 - B7
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! B8 - BB
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! BC - BF
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! C0 - C3
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! C4 - C7
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! C8 - CB
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! CC - CF
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! D0 - D3
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! D4 - D7
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! D8 - DB
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! DC - DF
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! E0 - E3
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! E4 - E7
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! E8 - EB
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! EC - EF
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! F0 - F3
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! F4 - F7
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! F8 - FB
|
|
SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; ! FC - FF
|
|
|
|
_window_overflow:
|
|
mov %wim, %l3 ! Calculate next WIM
|
|
mov %g1, %l7
|
|
srl %l3, 1, %g1
|
|
sll %l3, NWINDOWS - 1, %l4
|
|
or %l4, %g1, %g1
|
|
save ! Get into window to be saved.
|
|
mov %g1, %wim
|
|
nop
|
|
nop
|
|
nop
|
|
std %l0, [%sp + 0]
|
|
std %l2, [%sp + 8]
|
|
std %l4, [%sp + 16]
|
|
std %l6, [%sp + 24]
|
|
std %i0, [%sp + 32]
|
|
std %i2, [%sp + 40]
|
|
std %i4, [%sp + 48]
|
|
std %i6, [%sp + 56]
|
|
restore ! Go back to trap window.
|
|
mov %l7, %g1
|
|
jmp %l1 ! Re-execute save.
|
|
rett %l2
|
|
|
|
_window_underflow:
|
|
mov %wim, %l3 ! Calculate next WIM
|
|
sll %l3, 1, %l4
|
|
srl %l3, NWINDOWS - 1, %l5
|
|
or %l5, %l4, %l5
|
|
mov %l5, %wim
|
|
nop
|
|
nop
|
|
nop
|
|
restore ! Two restores to get into the
|
|
restore ! window to restore
|
|
ldd [%sp + 0], %l0 ! Restore window from the stack
|
|
ldd [%sp + 8], %l2
|
|
ldd [%sp + 16], %l4
|
|
ldd [%sp + 24], %l6
|
|
ldd [%sp + 32], %i0
|
|
ldd [%sp + 40], %i2
|
|
ldd [%sp + 48], %i4
|
|
ldd [%sp + 56], %i6
|
|
save ! Get back to the trap window.
|
|
save
|
|
jmp %l1 ! Re-execute restore.
|
|
rett %l2
|
|
|