[444] | 1 | /* |
---|
| 2 | * Copyright (c) 2011 Aeroflex Gaisler |
---|
| 3 | * |
---|
| 4 | * BSD license: |
---|
| 5 | * |
---|
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
---|
| 7 | * of this software and associated documentation files (the "Software"), to deal |
---|
| 8 | * in the Software without restriction, including without limitation the rights |
---|
| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
---|
| 10 | * copies of the Software, and to permit persons to whom the Software is |
---|
| 11 | * furnished to do so, subject to the following conditions: |
---|
| 12 | * |
---|
| 13 | * The above copyright notice and this permission notice shall be included in |
---|
| 14 | * all copies or substantial portions of the Software. |
---|
| 15 | * |
---|
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
---|
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
---|
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
---|
| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
---|
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
---|
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
---|
| 22 | * THE SOFTWARE. |
---|
| 23 | */ |
---|
| 24 | |
---|
| 25 | |
---|
| 26 | #include <asm-leon/leon.h> |
---|
| 27 | #include <asm-leon/leonstack.h> |
---|
| 28 | #include <asm-leon/asmmacro.h> |
---|
| 29 | |
---|
| 30 | .seg "text" |
---|
| 31 | |
---|
| 32 | |
---|
| 33 | /* Number of register windows */ |
---|
| 34 | .global _nwindows_min1, _nwindows |
---|
| 35 | |
---|
| 36 | ! Window overflow trap handler on save. |
---|
| 37 | ! Touches %g1 |
---|
| 38 | /* ------- */ |
---|
| 39 | .weak _window_overflow |
---|
| 40 | .set _window_overflow,__window_overflow |
---|
| 41 | .weak _window_overflow_svt |
---|
| 42 | .set _window_overflow_svt,__window_overflow_svt |
---|
| 43 | /* ------- */ |
---|
| 44 | !.global _window_overflow,_window_overflow_svt |
---|
| 45 | .global __window_overflow_rettseq,__window_overflow_rettseq_ret,__window_overflow_slow1 |
---|
| 46 | |
---|
| 47 | __window_overflow_svt: |
---|
| 48 | __window_overflow: |
---|
| 49 | #ifndef _FLAT |
---|
| 50 | __window_overflow_rettseq: |
---|
| 51 | mov %wim, %l3 ! Calculate next WIM |
---|
| 52 | mov %g1, %l7 |
---|
| 53 | srl %l3, 1, %g1 |
---|
| 54 | __window_overflow_rettseq_ret: |
---|
| 55 | sethi %hi(_nwindows_min1), %l4 ! NWINDOWS-1 |
---|
| 56 | ld [%l4+%lo(_nwindows_min1)], %l4 |
---|
| 57 | |
---|
| 58 | sll %l3, %l4 , %l4 |
---|
| 59 | or %l4, %g1, %g1 |
---|
| 60 | |
---|
| 61 | save ! Get into window to be saved. |
---|
| 62 | mov %g1, %wim |
---|
| 63 | nop; nop; nop |
---|
| 64 | std %l0, [%sp + 0]; |
---|
| 65 | std %l2, [%sp + 8]; |
---|
| 66 | std %l4, [%sp + 16]; |
---|
| 67 | std %l6, [%sp + 24]; |
---|
| 68 | std %i0, [%sp + 32]; |
---|
| 69 | std %i2, [%sp + 40]; |
---|
| 70 | std %i4, [%sp + 48]; |
---|
| 71 | std %i6, [%sp + 56]; |
---|
| 72 | restore ! Go back to trap window. |
---|
| 73 | mov %l7, %g1 |
---|
| 74 | |
---|
| 75 | jmp %l1 ! Re-execute save. |
---|
| 76 | rett %l2 |
---|
| 77 | nop |
---|
| 78 | |
---|
| 79 | __window_overflow_slow1: ! space for possible stackcheck patch |
---|
| 80 | nop |
---|
| 81 | nop |
---|
| 82 | #else |
---|
| 83 | ta 0 ! halt |
---|
| 84 | __window_overflow_rettseq: |
---|
| 85 | __window_overflow_rettseq_ret: |
---|
| 86 | __window_overflow_slow1: |
---|
| 87 | nop |
---|
| 88 | nop |
---|
| 89 | nop |
---|
| 90 | #endif |
---|
| 91 | |
---|
| 92 | /* Window underflow trap handler on restore. */ |
---|
| 93 | |
---|
| 94 | ! Touches %g1 |
---|
| 95 | /* ------- */ |
---|
| 96 | .weak _window_underflow |
---|
| 97 | .set _window_underflow,__window_underflow |
---|
| 98 | .weak _window_underflow_svt |
---|
| 99 | .set _window_underflow_svt,__window_underflow_svt |
---|
| 100 | /* ------- */ |
---|
| 101 | !.global _window_underflow,_window_underflow_svt |
---|
| 102 | |
---|
| 103 | __window_underflow_svt: |
---|
| 104 | __window_underflow: |
---|
| 105 | #ifndef _FLAT |
---|
| 106 | mov %wim, %l3 ! Calculate next WIM |
---|
| 107 | sll %l3, 1, %l4 |
---|
| 108 | |
---|
| 109 | sethi %hi(_nwindows_min1), %l5 ! NWINDOWS-1 |
---|
| 110 | ld [%l5+%lo(_nwindows_min1)], %l5 |
---|
| 111 | |
---|
| 112 | srl %l3, %l5, %l5 |
---|
| 113 | or %l5, %l4, %l5 |
---|
| 114 | mov %l5, %wim |
---|
| 115 | nop; nop; nop |
---|
| 116 | restore ! Two restores to get into the |
---|
| 117 | restore ! window to restore |
---|
| 118 | ldd [%sp + 0], %l0; ! Restore window from the stack |
---|
| 119 | ldd [%sp + 8], %l2; |
---|
| 120 | ldd [%sp + 16], %l4; |
---|
| 121 | ldd [%sp + 24], %l6; |
---|
| 122 | ldd [%sp + 32], %i0; |
---|
| 123 | ldd [%sp + 40], %i2; |
---|
| 124 | ldd [%sp + 48], %i4; |
---|
| 125 | ldd [%sp + 56], %i6; |
---|
| 126 | save ! Get back to the trap window. |
---|
| 127 | save |
---|
| 128 | jmp %l1 ! Re-execute restore. |
---|
| 129 | rett %l2 |
---|
| 130 | #else |
---|
| 131 | ta 0 ! halt |
---|
| 132 | #endif |
---|
| 133 | |
---|
| 134 | |
---|