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| 1 | # |
1 | # |
| 2 | # Copyright (C) 2005 Jakub Vana |
2 | # Copyright (C) 2005 Jakub Vana |
| 3 | # Copyright (C) 2005 Jakub Jermar |
3 | # Copyright (C) 2005 Jakub Jermar |
| 4 | # All rights reserved. |
4 | # All rights reserved. |
| 5 | # |
5 | # |
| 6 | # Redistribution and use in source and binary forms, with or without |
6 | # Redistribution and use in source and binary forms, with or without |
| 7 | # modification, are permitted provided that the following conditions |
7 | # modification, are permitted provided that the following conditions |
| 8 | # are met: |
8 | # are met: |
| 9 | # |
9 | # |
| 10 | # - Redistributions of source code must retain the above copyright |
10 | # - Redistributions of source code must retain the above copyright |
| 11 | # notice, this list of conditions and the following disclaimer. |
11 | # notice, this list of conditions and the following disclaimer. |
| 12 | # - Redistributions in binary form must reproduce the above copyright |
12 | # - Redistributions in binary form must reproduce the above copyright |
| 13 | # notice, this list of conditions and the following disclaimer in the |
13 | # notice, this list of conditions and the following disclaimer in the |
| 14 | # documentation and/or other materials provided with the distribution. |
14 | # documentation and/or other materials provided with the distribution. |
| 15 | # - The name of the author may not be used to endorse or promote products |
15 | # - The name of the author may not be used to endorse or promote products |
| 16 | # derived from this software without specific prior written permission. |
16 | # derived from this software without specific prior written permission. |
| 17 | # |
17 | # |
| 18 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 19 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 20 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 21 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 22 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 23 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 24 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 25 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 26 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 27 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | # |
28 | # |
| 29 | 29 | ||
| 30 | #include <arch/stack.h> |
30 | #include <arch/stack.h> |
| 31 | #include <arch/register.h> |
31 | #include <arch/register.h> |
| 32 | #include <arch/mm/page.h> |
32 | #include <arch/mm/page.h> |
| 33 | #include <align.h> |
33 | #include <align.h> |
| 34 | 34 | ||
| 35 | #define STACK_ITEMS 18 |
35 | #define STACK_ITEMS 19 |
| 36 | #define STACK_FRAME_SIZE ALIGN_UP((STACK_ITEMS*STACK_ITEM_SIZE) + STACK_SCRATCH_AREA_SIZE, STACK_ALIGNMENT) |
36 | #define STACK_FRAME_SIZE ALIGN_UP((STACK_ITEMS*STACK_ITEM_SIZE) + STACK_SCRATCH_AREA_SIZE, STACK_ALIGNMENT) |
| 37 | 37 | ||
| 38 | #if (STACK_ITEMS % 2 == 0) |
38 | #if (STACK_ITEMS % 2 == 0) |
| 39 | # define STACK_FRAME_BIAS 8 |
39 | # define STACK_FRAME_BIAS 8 |
| 40 | #else |
40 | #else |
| 41 | # define STACK_FRAME_BIAS 16 |
41 | # define STACK_FRAME_BIAS 16 |
| 42 | #endif |
42 | #endif |
| 43 | 43 | ||
| 44 | /** Partitioning of bank 0 registers. */ |
44 | /** Partitioning of bank 0 registers. */ |
| 45 | #define R_OFFS r16 |
45 | #define R_OFFS r16 |
| 46 | #define R_HANDLER r17 |
46 | #define R_HANDLER r17 |
| 47 | #define R_RET r18 |
47 | #define R_RET r18 |
| 48 | #define R_TMP r19 |
48 | #define R_TMP r19 |
| 49 | #define R_KSTACK_BSP r22 /* keep in sync with before_thread_runs_arch() */ |
49 | #define R_KSTACK_BSP r22 /* keep in sync with before_thread_runs_arch() */ |
| 50 | #define R_KSTACK r23 /* keep in sync with before_thread_runs_arch() */ |
50 | #define R_KSTACK r23 /* keep in sync with before_thread_runs_arch() */ |
| 51 | 51 | ||
| 52 | /** Heavyweight interrupt handler |
52 | /** Heavyweight interrupt handler |
| 53 | * |
53 | * |
| 54 | * This macro roughly follows steps from 1 to 19 described in |
54 | * This macro roughly follows steps from 1 to 19 described in |
| 55 | * Intel Itanium Architecture Software Developer's Manual, Chapter 3.4.2. |
55 | * Intel Itanium Architecture Software Developer's Manual, Chapter 3.4.2. |
| 56 | * |
56 | * |
| 57 | * HEAVYWEIGHT_HANDLER macro must cram into 16 bundles (48 instructions). |
57 | * HEAVYWEIGHT_HANDLER macro must cram into 16 bundles (48 instructions). |
| 58 | * This goal is achieved by using procedure calls after RSE becomes operational. |
58 | * This goal is achieved by using procedure calls after RSE becomes operational. |
| 59 | * |
59 | * |
| 60 | * Some steps are skipped (enabling and disabling interrupts). |
60 | * Some steps are skipped (enabling and disabling interrupts). |
| 61 | * Some steps are not fully supported yet (e.g. dealing with floating-point |
61 | * Some steps are not fully supported yet (e.g. dealing with floating-point |
| 62 | * context). |
62 | * context). |
| 63 | * |
63 | * |
| 64 | * @param offs Offset from the beginning of IVT. |
64 | * @param offs Offset from the beginning of IVT. |
| 65 | * @param handler Interrupt handler address. |
65 | * @param handler Interrupt handler address. |
| 66 | */ |
66 | */ |
| 67 | .macro HEAVYWEIGHT_HANDLER offs, handler=universal_handler |
67 | .macro HEAVYWEIGHT_HANDLER offs, handler=universal_handler |
| 68 | .org ivt + \offs |
68 | .org ivt + \offs |
| 69 | mov R_OFFS = \offs |
69 | mov R_OFFS = \offs |
| 70 | movl R_HANDLER = \handler ;; |
70 | movl R_HANDLER = \handler ;; |
| 71 | br heavyweight_handler |
71 | br heavyweight_handler |
| 72 | .endm |
72 | .endm |
| 73 | 73 | ||
| 74 | .global heavyweight_handler |
74 | .global heavyweight_handler |
| 75 | heavyweight_handler: |
75 | heavyweight_handler: |
| 76 | /* 1. copy interrupt registers into bank 0 */ |
76 | /* 1. copy interrupt registers into bank 0 */ |
| 77 | 77 | ||
| 78 | /* |
78 | /* |
| 79 | * Note that r24-r31 from bank 0 can be used only as long as PSR.ic = 0. |
79 | * Note that r24-r31 from bank 0 can be used only as long as PSR.ic = 0. |
| 80 | */ |
80 | */ |
| 81 | mov r24 = cr.iip |
81 | mov r24 = cr.iip |
| 82 | mov r25 = cr.ipsr |
82 | mov r25 = cr.ipsr |
| 83 | mov r26 = cr.iipa |
83 | mov r26 = cr.iipa |
| 84 | mov r27 = cr.isr |
84 | mov r27 = cr.isr |
| 85 | mov r28 = cr.ifa |
85 | mov r28 = cr.ifa |
| 86 | 86 | ||
| 87 | /* 2. preserve predicate register into bank 0 */ |
87 | /* 2. preserve predicate register into bank 0 */ |
| 88 | mov r29 = pr ;; |
88 | mov r29 = pr ;; |
| 89 | 89 | ||
| 90 | /* 3. switch to kernel memory stack */ |
90 | /* 3. switch to kernel memory stack */ |
| 91 | mov r30 = cr.ipsr |
91 | mov r30 = cr.ipsr |
| 92 | shr.u r31 = r12, VRN_SHIFT ;; |
92 | shr.u r31 = r12, VRN_SHIFT ;; |
| 93 | 93 | ||
| 94 | shr.u r30 = r30, PSR_CPL_SHIFT ;; |
94 | shr.u r30 = r30, PSR_CPL_SHIFT ;; |
| 95 | and r30 = PSR_CPL_MASK_SHIFTED, r30 ;; |
95 | and r30 = PSR_CPL_MASK_SHIFTED, r30 ;; |
| 96 | 96 | ||
| 97 | /* |
97 | /* |
| 98 | * Set p3 to true if the interrupted context executed in kernel mode. |
98 | * Set p3 to true if the interrupted context executed in kernel mode. |
| 99 | * Set p4 to false if the interrupted context didn't execute in kernel mode. |
99 | * Set p4 to false if the interrupted context didn't execute in kernel mode. |
| 100 | */ |
100 | */ |
| 101 | cmp.eq p3, p4 = r30, r0 ;; |
101 | cmp.eq p3, p4 = r30, r0 ;; |
| 102 | cmp.eq p1, p2 = r30, r0 ;; /* remember IPSR setting in p1 and p2 */ |
102 | cmp.eq p1, p2 = r30, r0 ;; /* remember IPSR setting in p1 and p2 */ |
| 103 | 103 | ||
| 104 | /* |
104 | /* |
| 105 | * Set p3 to true if the stack register references kernel address space. |
105 | * Set p3 to true if the stack register references kernel address space. |
| 106 | * Set p4 to false if the stack register doesn't reference kernel address space. |
106 | * Set p4 to false if the stack register doesn't reference kernel address space. |
| 107 | */ |
107 | */ |
| 108 | (p3) cmp.eq p3, p4 = VRN_KERNEL, r31 ;; |
108 | (p3) cmp.eq p3, p4 = VRN_KERNEL, r31 ;; |
| 109 | 109 | ||
| 110 | /* |
110 | /* |
| 111 | * Now, p4 is true iff the stack needs to be switched to kernel stack. |
111 | * Now, p4 is true iff the stack needs to be switched to kernel stack. |
| 112 | */ |
112 | */ |
| 113 | mov r30 = r12 |
113 | mov r30 = r12 |
| 114 | (p4) mov r12 = R_KSTACK ;; |
114 | (p4) mov r12 = R_KSTACK ;; |
| 115 | 115 | ||
| 116 | add r31 = -STACK_FRAME_BIAS, r12 ;; |
116 | add r31 = -STACK_FRAME_BIAS, r12 ;; |
| 117 | add r12 = -STACK_FRAME_SIZE, r12 |
117 | add r12 = -STACK_FRAME_SIZE, r12 |
| 118 | 118 | ||
| 119 | /* 4. save registers in bank 0 into memory stack */ |
119 | /* 4. save registers in bank 0 into memory stack */ |
| 120 | 120 | ||
| 121 | /* |
121 | /* |
| 122 | * If this is break_instruction handler, |
122 | * If this is break_instruction handler, |
| 123 | * copy input parameters to stack. |
123 | * copy input parameters to stack. |
| 124 | */ |
124 | */ |
| 125 | mov R_TMP = 0x2c00 ;; |
125 | mov R_TMP = 0x2c00 ;; |
| 126 | cmp.eq p6,p5 = R_OFFS, R_TMP ;; |
126 | cmp.eq p6,p5 = R_OFFS, R_TMP ;; |
| 127 | 127 | ||
| 128 | /* |
128 | /* |
| 129 | * From now on, if this is break_instruction handler, p6 is true and p5 is false. |
129 | * From now on, if this is break_instruction handler, p6 is true and p5 is false. |
| 130 | * Otherwise p6 is false and p5 is true. |
130 | * Otherwise p6 is false and p5 is true. |
| 131 | * Note that p5 is a preserved predicate register and we make use of it. |
131 | * Note that p5 is a preserved predicate register and we make use of it. |
| 132 | */ |
132 | */ |
| 133 | 133 | ||
| - | 134 | (p6) st8 [r31] = r36, -8 ;; /* save in4 */ |
|
| 134 | (p6) st8 [r31] = r35, -8 ;; /* save in3 */ |
135 | (p6) st8 [r31] = r35, -8 ;; /* save in3 */ |
| 135 | (p6) st8 [r31] = r34, -8 ;; /* save in2 */ |
136 | (p6) st8 [r31] = r34, -8 ;; /* save in2 */ |
| 136 | (p6) st8 [r31] = r33, -8 ;; /* save in1 */ |
137 | (p6) st8 [r31] = r33, -8 ;; /* save in1 */ |
| 137 | (p6) st8 [r31] = r32, -8 ;; /* save in0 */ |
138 | (p6) st8 [r31] = r32, -8 ;; /* save in0 */ |
| 138 | (p5) add r31 = -32, r31 ;; |
139 | (p5) add r31 = -40, r31 ;; |
| 139 | 140 | ||
| 140 | st8 [r31] = r30, -8 ;; /* save old stack pointer */ |
141 | st8 [r31] = r30, -8 ;; /* save old stack pointer */ |
| 141 | 142 | ||
| 142 | st8 [r31] = r29, -8 ;; /* save predicate registers */ |
143 | st8 [r31] = r29, -8 ;; /* save predicate registers */ |
| 143 | 144 | ||
| 144 | st8 [r31] = r24, -8 ;; /* save cr.iip */ |
145 | st8 [r31] = r24, -8 ;; /* save cr.iip */ |
| 145 | st8 [r31] = r25, -8 ;; /* save cr.ipsr */ |
146 | st8 [r31] = r25, -8 ;; /* save cr.ipsr */ |
| 146 | st8 [r31] = r26, -8 ;; /* save cr.iipa */ |
147 | st8 [r31] = r26, -8 ;; /* save cr.iipa */ |
| 147 | st8 [r31] = r27, -8 ;; /* save cr.isr */ |
148 | st8 [r31] = r27, -8 ;; /* save cr.isr */ |
| 148 | st8 [r31] = r28, -8 ;; /* save cr.ifa */ |
149 | st8 [r31] = r28, -8 ;; /* save cr.ifa */ |
| 149 | 150 | ||
| 150 | /* 5. RSE switch from interrupted context */ |
151 | /* 5. RSE switch from interrupted context */ |
| 151 | mov r24 = ar.rsc |
152 | mov r24 = ar.rsc |
| 152 | mov r25 = ar.pfs |
153 | mov r25 = ar.pfs |
| 153 | cover |
154 | cover |
| 154 | mov r26 = cr.ifs |
155 | mov r26 = cr.ifs |
| 155 | 156 | ||
| 156 | st8 [r31] = r24, -8 ;; /* save ar.rsc */ |
157 | st8 [r31] = r24, -8 ;; /* save ar.rsc */ |
| 157 | st8 [r31] = r25, -8 ;; /* save ar.pfs */ |
158 | st8 [r31] = r25, -8 ;; /* save ar.pfs */ |
| 158 | st8 [r31] = r26, -8 /* save ar.ifs */ |
159 | st8 [r31] = r26, -8 /* save ar.ifs */ |
| 159 | 160 | ||
| 160 | and r24 = ~(RSC_PL_MASK), r24 ;; |
161 | and r24 = ~(RSC_PL_MASK), r24 ;; |
| 161 | and r30 = ~(RSC_MODE_MASK), r24 ;; |
162 | and r30 = ~(RSC_MODE_MASK), r24 ;; |
| 162 | mov ar.rsc = r30 ;; /* update RSE state */ |
163 | mov ar.rsc = r30 ;; /* update RSE state */ |
| 163 | 164 | ||
| 164 | mov r27 = ar.rnat |
165 | mov r27 = ar.rnat |
| 165 | mov r28 = ar.bspstore ;; |
166 | mov r28 = ar.bspstore ;; |
| 166 | 167 | ||
| 167 | /* |
168 | /* |
| 168 | * Inspect BSPSTORE to figure out whether it is necessary to switch to kernel BSPSTORE. |
169 | * Inspect BSPSTORE to figure out whether it is necessary to switch to kernel BSPSTORE. |
| 169 | */ |
170 | */ |
| 170 | (p1) shr.u r30 = r28, VRN_SHIFT ;; |
171 | (p1) shr.u r30 = r28, VRN_SHIFT ;; |
| 171 | (p1) cmp.eq p1, p2 = VRN_KERNEL, r30 ;; |
172 | (p1) cmp.eq p1, p2 = VRN_KERNEL, r30 ;; |
| 172 | 173 | ||
| 173 | /* |
174 | /* |
| 174 | * If BSPSTORE needs to be switched, p1 is false and p2 is true. |
175 | * If BSPSTORE needs to be switched, p1 is false and p2 is true. |
| 175 | */ |
176 | */ |
| 176 | (p1) mov r30 = r28 |
177 | (p1) mov r30 = r28 |
| 177 | (p2) mov r30 = R_KSTACK_BSP ;; |
178 | (p2) mov r30 = R_KSTACK_BSP ;; |
| 178 | (p2) mov ar.bspstore = r30 ;; |
179 | (p2) mov ar.bspstore = r30 ;; |
| 179 | 180 | ||
| 180 | mov r29 = ar.bsp |
181 | mov r29 = ar.bsp |
| 181 | 182 | ||
| 182 | st8 [r31] = r27, -8 ;; /* save ar.rnat */ |
183 | st8 [r31] = r27, -8 ;; /* save ar.rnat */ |
| 183 | st8 [r31] = r30, -8 ;; /* save new value written to ar.bspstore */ |
184 | st8 [r31] = r30, -8 ;; /* save new value written to ar.bspstore */ |
| 184 | st8 [r31] = r28, -8 ;; /* save ar.bspstore */ |
185 | st8 [r31] = r28, -8 ;; /* save ar.bspstore */ |
| 185 | st8 [r31] = r29, -8 /* save ar.bsp */ |
186 | st8 [r31] = r29, -8 /* save ar.bsp */ |
| 186 | 187 | ||
| 187 | mov ar.rsc = r24 /* restore RSE's setting + kernel privileges */ |
188 | mov ar.rsc = r24 /* restore RSE's setting + kernel privileges */ |
| 188 | 189 | ||
| 189 | /* steps 6 - 15 are done by heavyweight_handler_inner() */ |
190 | /* steps 6 - 15 are done by heavyweight_handler_inner() */ |
| 190 | mov R_RET = b0 /* save b0 belonging to interrupted context */ |
191 | mov R_RET = b0 /* save b0 belonging to interrupted context */ |
| 191 | br.call.sptk.many b0 = heavyweight_handler_inner |
192 | br.call.sptk.many b0 = heavyweight_handler_inner |
| 192 | 0: mov b0 = R_RET /* restore b0 belonging to the interrupted context */ |
193 | 0: mov b0 = R_RET /* restore b0 belonging to the interrupted context */ |
| 193 | 194 | ||
| 194 | /* 16. RSE switch to interrupted context */ |
195 | /* 16. RSE switch to interrupted context */ |
| 195 | cover /* allocate zerro size frame (step 1 (from Intel Docs)) */ |
196 | cover /* allocate zerro size frame (step 1 (from Intel Docs)) */ |
| 196 | 197 | ||
| 197 | add r31 = STACK_SCRATCH_AREA_SIZE, r12 ;; |
198 | add r31 = STACK_SCRATCH_AREA_SIZE, r12 ;; |
| 198 | 199 | ||
| 199 | ld8 r30 = [r31], +8 ;; /* load ar.bsp */ |
200 | ld8 r30 = [r31], +8 ;; /* load ar.bsp */ |
| 200 | ld8 r29 = [r31], +8 ;; /* load ar.bspstore */ |
201 | ld8 r29 = [r31], +8 ;; /* load ar.bspstore */ |
| 201 | ld8 r28 = [r31], +8 ;; /* load ar.bspstore_new */ |
202 | ld8 r28 = [r31], +8 ;; /* load ar.bspstore_new */ |
| 202 | sub r27 = r30 , r28 ;; /* calculate loadrs (step 2) */ |
203 | sub r27 = r30 , r28 ;; /* calculate loadrs (step 2) */ |
| 203 | shl r27 = r27, 16 |
204 | shl r27 = r27, 16 |
| 204 | 205 | ||
| 205 | mov r24 = ar.rsc ;; |
206 | mov r24 = ar.rsc ;; |
| 206 | and r30 = ~3, r24 ;; |
207 | and r30 = ~3, r24 ;; |
| 207 | or r24 = r30 , r27 ;; |
208 | or r24 = r30 , r27 ;; |
| 208 | mov ar.rsc = r24 ;; /* place RSE in enforced lazy mode */ |
209 | mov ar.rsc = r24 ;; /* place RSE in enforced lazy mode */ |
| 209 | 210 | ||
| 210 | loadrs /* (step 3) */ |
211 | loadrs /* (step 3) */ |
| 211 | 212 | ||
| 212 | ld8 r27 = [r31], +8 ;; /* load ar.rnat */ |
213 | ld8 r27 = [r31], +8 ;; /* load ar.rnat */ |
| 213 | ld8 r26 = [r31], +8 ;; /* load cr.ifs */ |
214 | ld8 r26 = [r31], +8 ;; /* load cr.ifs */ |
| 214 | ld8 r25 = [r31], +8 ;; /* load ar.pfs */ |
215 | ld8 r25 = [r31], +8 ;; /* load ar.pfs */ |
| 215 | ld8 r24 = [r31], +8 ;; /* load ar.rsc */ |
216 | ld8 r24 = [r31], +8 ;; /* load ar.rsc */ |
| 216 | 217 | ||
| 217 | mov ar.bspstore = r29 ;; /* (step 4) */ |
218 | mov ar.bspstore = r29 ;; /* (step 4) */ |
| 218 | mov ar.rnat = r27 /* (step 5) */ |
219 | mov ar.rnat = r27 /* (step 5) */ |
| 219 | 220 | ||
| 220 | mov ar.pfs = r25 /* (step 6) */ |
221 | mov ar.pfs = r25 /* (step 6) */ |
| 221 | mov cr.ifs = r26 |
222 | mov cr.ifs = r26 |
| 222 | 223 | ||
| 223 | mov ar.rsc = r24 /* (step 7) */ |
224 | mov ar.rsc = r24 /* (step 7) */ |
| 224 | 225 | ||
| 225 | /* 17. restore interruption state from memory stack */ |
226 | /* 17. restore interruption state from memory stack */ |
| 226 | ld8 r28 = [r31], +8 ;; /* load cr.ifa */ |
227 | ld8 r28 = [r31], +8 ;; /* load cr.ifa */ |
| 227 | ld8 r27 = [r31], +8 ;; /* load cr.isr */ |
228 | ld8 r27 = [r31], +8 ;; /* load cr.isr */ |
| 228 | ld8 r26 = [r31], +8 ;; /* load cr.iipa */ |
229 | ld8 r26 = [r31], +8 ;; /* load cr.iipa */ |
| 229 | ld8 r25 = [r31], +8 ;; /* load cr.ipsr */ |
230 | ld8 r25 = [r31], +8 ;; /* load cr.ipsr */ |
| 230 | ld8 r24 = [r31], +8 ;; /* load cr.iip */ |
231 | ld8 r24 = [r31], +8 ;; /* load cr.iip */ |
| 231 | 232 | ||
| 232 | mov cr.iip = r24 |
233 | mov cr.iip = r24 |
| 233 | mov cr.ipsr = r25 |
234 | mov cr.ipsr = r25 |
| 234 | mov cr.iipa = r26 |
235 | mov cr.iipa = r26 |
| 235 | mov cr.isr = r27 |
236 | mov cr.isr = r27 |
| 236 | mov cr.ifa = r28 |
237 | mov cr.ifa = r28 |
| 237 | 238 | ||
| 238 | /* 18. restore predicate registers from memory stack */ |
239 | /* 18. restore predicate registers from memory stack */ |
| 239 | ld8 r29 = [r31], +8 ;; /* load predicate registers */ |
240 | ld8 r29 = [r31], +8 ;; /* load predicate registers */ |
| 240 | mov pr = r29 |
241 | mov pr = r29 |
| 241 | 242 | ||
| 242 | /* 19. return from interruption */ |
243 | /* 19. return from interruption */ |
| 243 | ld8 r12 = [r31] /* load stack pointer */ |
244 | ld8 r12 = [r31] /* load stack pointer */ |
| 244 | rfi ;; |
245 | rfi ;; |
| 245 | 246 | ||
| 246 | .global heavyweight_handler_inner |
247 | .global heavyweight_handler_inner |
| 247 | heavyweight_handler_inner: |
248 | heavyweight_handler_inner: |
| 248 | /* |
249 | /* |
| 249 | * From this point, the rest of the interrupted context |
250 | * From this point, the rest of the interrupted context |
| 250 | * will be preserved in stacked registers and backing store. |
251 | * will be preserved in stacked registers and backing store. |
| 251 | */ |
252 | */ |
| 252 | alloc loc0 = ar.pfs, 0, 47, 2, 0 ;; |
253 | alloc loc0 = ar.pfs, 0, 47, 2, 0 ;; |
| 253 | 254 | ||
| 254 | /* bank 0 is going to be shadowed, copy essential data from there */ |
255 | /* bank 0 is going to be shadowed, copy essential data from there */ |
| 255 | mov loc1 = R_RET /* b0 belonging to interrupted context */ |
256 | mov loc1 = R_RET /* b0 belonging to interrupted context */ |
| 256 | mov loc2 = R_HANDLER |
257 | mov loc2 = R_HANDLER |
| 257 | mov out0 = R_OFFS |
258 | mov out0 = R_OFFS |
| 258 | 259 | ||
| 259 | add out1 = STACK_SCRATCH_AREA_SIZE, r12 |
260 | add out1 = STACK_SCRATCH_AREA_SIZE, r12 |
| 260 | 261 | ||
| 261 | /* 6. switch to bank 1 and reenable PSR.ic */ |
262 | /* 6. switch to bank 1 and reenable PSR.ic */ |
| 262 | ssm PSR_IC_MASK |
263 | ssm PSR_IC_MASK |
| 263 | bsw.1 ;; |
264 | bsw.1 ;; |
| 264 | srlz.d |
265 | srlz.d |
| 265 | 266 | ||
| 266 | /* 7. preserve branch and application registers */ |
267 | /* 7. preserve branch and application registers */ |
| 267 | mov loc3 = ar.unat |
268 | mov loc3 = ar.unat |
| 268 | mov loc4 = ar.lc |
269 | mov loc4 = ar.lc |
| 269 | mov loc5 = ar.ec |
270 | mov loc5 = ar.ec |
| 270 | mov loc6 = ar.ccv |
271 | mov loc6 = ar.ccv |
| 271 | mov loc7 = ar.csd |
272 | mov loc7 = ar.csd |
| 272 | mov loc8 = ar.ssd |
273 | mov loc8 = ar.ssd |
| 273 | 274 | ||
| 274 | mov loc9 = b0 |
275 | mov loc9 = b0 |
| 275 | mov loc10 = b1 |
276 | mov loc10 = b1 |
| 276 | mov loc11 = b2 |
277 | mov loc11 = b2 |
| 277 | mov loc12 = b3 |
278 | mov loc12 = b3 |
| 278 | mov loc13 = b4 |
279 | mov loc13 = b4 |
| 279 | mov loc14 = b5 |
280 | mov loc14 = b5 |
| 280 | mov loc15 = b6 |
281 | mov loc15 = b6 |
| 281 | mov loc16 = b7 |
282 | mov loc16 = b7 |
| 282 | 283 | ||
| 283 | /* 8. preserve general and floating-point registers */ |
284 | /* 8. preserve general and floating-point registers */ |
| 284 | /* TODO: save floating-point context */ |
285 | /* TODO: save floating-point context */ |
| 285 | mov loc17 = r1 |
286 | mov loc17 = r1 |
| 286 | mov loc18 = r2 |
287 | mov loc18 = r2 |
| 287 | mov loc19 = r3 |
288 | mov loc19 = r3 |
| 288 | mov loc20 = r4 |
289 | mov loc20 = r4 |
| 289 | mov loc21 = r5 |
290 | mov loc21 = r5 |
| 290 | mov loc22 = r6 |
291 | mov loc22 = r6 |
| 291 | mov loc23 = r7 |
292 | mov loc23 = r7 |
| 292 | (p5) mov loc24 = r8 /* only if not in break_instruction handler */ |
293 | (p5) mov loc24 = r8 /* only if not in break_instruction handler */ |
| 293 | mov loc25 = r9 |
294 | mov loc25 = r9 |
| 294 | mov loc26 = r10 |
295 | mov loc26 = r10 |
| 295 | mov loc27 = r11 |
296 | mov loc27 = r11 |
| 296 | /* skip r12 (stack pointer) */ |
297 | /* skip r12 (stack pointer) */ |
| 297 | mov loc28 = r13 |
298 | mov loc28 = r13 |
| 298 | mov loc29 = r14 |
299 | mov loc29 = r14 |
| 299 | mov loc30 = r15 |
300 | mov loc30 = r15 |
| 300 | mov loc31 = r16 |
301 | mov loc31 = r16 |
| 301 | mov loc32 = r17 |
302 | mov loc32 = r17 |
| 302 | mov loc33 = r18 |
303 | mov loc33 = r18 |
| 303 | mov loc34 = r19 |
304 | mov loc34 = r19 |
| 304 | mov loc35 = r20 |
305 | mov loc35 = r20 |
| 305 | mov loc36 = r21 |
306 | mov loc36 = r21 |
| 306 | mov loc37 = r22 |
307 | mov loc37 = r22 |
| 307 | mov loc38 = r23 |
308 | mov loc38 = r23 |
| 308 | mov loc39 = r24 |
309 | mov loc39 = r24 |
| 309 | mov loc40 = r25 |
310 | mov loc40 = r25 |
| 310 | mov loc41 = r26 |
311 | mov loc41 = r26 |
| 311 | mov loc42 = r27 |
312 | mov loc42 = r27 |
| 312 | mov loc43 = r28 |
313 | mov loc43 = r28 |
| 313 | mov loc44 = r29 |
314 | mov loc44 = r29 |
| 314 | mov loc45 = r30 |
315 | mov loc45 = r30 |
| 315 | mov loc46 = r31 |
316 | mov loc46 = r31 |
| 316 | 317 | ||
| 317 | /* 9. skipped (will not enable interrupts) */ |
318 | /* 9. skipped (will not enable interrupts) */ |
| 318 | /* |
319 | /* |
| 319 | * ssm PSR_I_MASK |
320 | * ssm PSR_I_MASK |
| 320 | * ;; |
321 | * ;; |
| 321 | * srlz.d |
322 | * srlz.d |
| 322 | */ |
323 | */ |
| 323 | 324 | ||
| 324 | /* 10. call handler */ |
325 | /* 10. call handler */ |
| 325 | movl r1 = _hardcoded_load_address |
326 | movl r1 = _hardcoded_load_address |
| 326 | 327 | ||
| 327 | mov b1 = loc2 |
328 | mov b1 = loc2 |
| 328 | br.call.sptk.many b0 = b1 |
329 | br.call.sptk.many b0 = b1 |
| 329 | 330 | ||
| 330 | /* 11. return from handler */ |
331 | /* 11. return from handler */ |
| 331 | 0: |
332 | 0: |
| 332 | 333 | ||
| 333 | /* 12. skipped (will not disable interrupts) */ |
334 | /* 12. skipped (will not disable interrupts) */ |
| 334 | /* |
335 | /* |
| 335 | * rsm PSR_I_MASK |
336 | * rsm PSR_I_MASK |
| 336 | * ;; |
337 | * ;; |
| 337 | * srlz.d |
338 | * srlz.d |
| 338 | */ |
339 | */ |
| 339 | 340 | ||
| 340 | /* 13. restore general and floating-point registers */ |
341 | /* 13. restore general and floating-point registers */ |
| 341 | /* TODO: restore floating-point context */ |
342 | /* TODO: restore floating-point context */ |
| 342 | mov r1 = loc17 |
343 | mov r1 = loc17 |
| 343 | mov r2 = loc18 |
344 | mov r2 = loc18 |
| 344 | mov r3 = loc19 |
345 | mov r3 = loc19 |
| 345 | mov r4 = loc20 |
346 | mov r4 = loc20 |
| 346 | mov r5 = loc21 |
347 | mov r5 = loc21 |
| 347 | mov r6 = loc22 |
348 | mov r6 = loc22 |
| 348 | mov r7 = loc23 |
349 | mov r7 = loc23 |
| 349 | (p5) mov r8 = loc24 /* only if not in break_instruction handler */ |
350 | (p5) mov r8 = loc24 /* only if not in break_instruction handler */ |
| 350 | mov r9 = loc25 |
351 | mov r9 = loc25 |
| 351 | mov r10 = loc26 |
352 | mov r10 = loc26 |
| 352 | mov r11 = loc27 |
353 | mov r11 = loc27 |
| 353 | /* skip r12 (stack pointer) */ |
354 | /* skip r12 (stack pointer) */ |
| 354 | mov r13 = loc28 |
355 | mov r13 = loc28 |
| 355 | mov r14 = loc29 |
356 | mov r14 = loc29 |
| 356 | mov r15 = loc30 |
357 | mov r15 = loc30 |
| 357 | mov r16 = loc31 |
358 | mov r16 = loc31 |
| 358 | mov r17 = loc32 |
359 | mov r17 = loc32 |
| 359 | mov r18 = loc33 |
360 | mov r18 = loc33 |
| 360 | mov r19 = loc34 |
361 | mov r19 = loc34 |
| 361 | mov r20 = loc35 |
362 | mov r20 = loc35 |
| 362 | mov r21 = loc36 |
363 | mov r21 = loc36 |
| 363 | mov r22 = loc37 |
364 | mov r22 = loc37 |
| 364 | mov r23 = loc38 |
365 | mov r23 = loc38 |
| 365 | mov r24 = loc39 |
366 | mov r24 = loc39 |
| 366 | mov r25 = loc40 |
367 | mov r25 = loc40 |
| 367 | mov r26 = loc41 |
368 | mov r26 = loc41 |
| 368 | mov r27 = loc42 |
369 | mov r27 = loc42 |
| 369 | mov r28 = loc43 |
370 | mov r28 = loc43 |
| 370 | mov r29 = loc44 |
371 | mov r29 = loc44 |
| 371 | mov r30 = loc45 |
372 | mov r30 = loc45 |
| 372 | mov r31 = loc46 |
373 | mov r31 = loc46 |
| 373 | 374 | ||
| 374 | /* 14. restore branch and application registers */ |
375 | /* 14. restore branch and application registers */ |
| 375 | mov ar.unat = loc3 |
376 | mov ar.unat = loc3 |
| 376 | mov ar.lc = loc4 |
377 | mov ar.lc = loc4 |
| 377 | mov ar.ec = loc5 |
378 | mov ar.ec = loc5 |
| 378 | mov ar.ccv = loc6 |
379 | mov ar.ccv = loc6 |
| 379 | mov ar.csd = loc7 |
380 | mov ar.csd = loc7 |
| 380 | mov ar.ssd = loc8 |
381 | mov ar.ssd = loc8 |
| 381 | 382 | ||
| 382 | mov b0 = loc9 |
383 | mov b0 = loc9 |
| 383 | mov b1 = loc10 |
384 | mov b1 = loc10 |
| 384 | mov b2 = loc11 |
385 | mov b2 = loc11 |
| 385 | mov b3 = loc12 |
386 | mov b3 = loc12 |
| 386 | mov b4 = loc13 |
387 | mov b4 = loc13 |
| 387 | mov b5 = loc14 |
388 | mov b5 = loc14 |
| 388 | mov b6 = loc15 |
389 | mov b6 = loc15 |
| 389 | mov b7 = loc16 |
390 | mov b7 = loc16 |
| 390 | 391 | ||
| 391 | /* 15. disable PSR.ic and switch to bank 0 */ |
392 | /* 15. disable PSR.ic and switch to bank 0 */ |
| 392 | rsm PSR_IC_MASK |
393 | rsm PSR_IC_MASK |
| 393 | bsw.0 ;; |
394 | bsw.0 ;; |
| 394 | srlz.d |
395 | srlz.d |
| 395 | 396 | ||
| 396 | mov R_RET = loc1 |
397 | mov R_RET = loc1 |
| 397 | mov ar.pfs = loc0 |
398 | mov ar.pfs = loc0 |
| 398 | br.ret.sptk.many b0 |
399 | br.ret.sptk.many b0 |
| 399 | 400 | ||
| 400 | .global ivt |
401 | .global ivt |
| 401 | .align 32768 |
402 | .align 32768 |
| 402 | ivt: |
403 | ivt: |
| 403 | HEAVYWEIGHT_HANDLER 0x0000 |
404 | HEAVYWEIGHT_HANDLER 0x0000 |
| 404 | HEAVYWEIGHT_HANDLER 0x0400 |
405 | HEAVYWEIGHT_HANDLER 0x0400 |
| 405 | HEAVYWEIGHT_HANDLER 0x0800 |
406 | HEAVYWEIGHT_HANDLER 0x0800 |
| 406 | HEAVYWEIGHT_HANDLER 0x0c00 alternate_instruction_tlb_fault |
407 | HEAVYWEIGHT_HANDLER 0x0c00 alternate_instruction_tlb_fault |
| 407 | HEAVYWEIGHT_HANDLER 0x1000 alternate_data_tlb_fault |
408 | HEAVYWEIGHT_HANDLER 0x1000 alternate_data_tlb_fault |
| 408 | HEAVYWEIGHT_HANDLER 0x1400 data_nested_tlb_fault |
409 | HEAVYWEIGHT_HANDLER 0x1400 data_nested_tlb_fault |
| 409 | HEAVYWEIGHT_HANDLER 0x1800 |
410 | HEAVYWEIGHT_HANDLER 0x1800 |
| 410 | HEAVYWEIGHT_HANDLER 0x1c00 |
411 | HEAVYWEIGHT_HANDLER 0x1c00 |
| 411 | HEAVYWEIGHT_HANDLER 0x2000 data_dirty_bit_fault |
412 | HEAVYWEIGHT_HANDLER 0x2000 data_dirty_bit_fault |
| 412 | HEAVYWEIGHT_HANDLER 0x2400 instruction_access_bit_fault |
413 | HEAVYWEIGHT_HANDLER 0x2400 instruction_access_bit_fault |
| 413 | HEAVYWEIGHT_HANDLER 0x2800 data_access_bit_fault |
414 | HEAVYWEIGHT_HANDLER 0x2800 data_access_bit_fault |
| 414 | HEAVYWEIGHT_HANDLER 0x2c00 break_instruction |
415 | HEAVYWEIGHT_HANDLER 0x2c00 break_instruction |
| 415 | HEAVYWEIGHT_HANDLER 0x3000 external_interrupt /* For external interrupt, heavyweight handler is used. */ |
416 | HEAVYWEIGHT_HANDLER 0x3000 external_interrupt /* For external interrupt, heavyweight handler is used. */ |
| 416 | HEAVYWEIGHT_HANDLER 0x3400 |
417 | HEAVYWEIGHT_HANDLER 0x3400 |
| 417 | HEAVYWEIGHT_HANDLER 0x3800 |
418 | HEAVYWEIGHT_HANDLER 0x3800 |
| 418 | HEAVYWEIGHT_HANDLER 0x3c00 |
419 | HEAVYWEIGHT_HANDLER 0x3c00 |
| 419 | HEAVYWEIGHT_HANDLER 0x4000 |
420 | HEAVYWEIGHT_HANDLER 0x4000 |
| 420 | HEAVYWEIGHT_HANDLER 0x4400 |
421 | HEAVYWEIGHT_HANDLER 0x4400 |
| 421 | HEAVYWEIGHT_HANDLER 0x4800 |
422 | HEAVYWEIGHT_HANDLER 0x4800 |
| 422 | HEAVYWEIGHT_HANDLER 0x4c00 |
423 | HEAVYWEIGHT_HANDLER 0x4c00 |
| 423 | 424 | ||
| 424 | HEAVYWEIGHT_HANDLER 0x5000 page_not_present |
425 | HEAVYWEIGHT_HANDLER 0x5000 page_not_present |
| 425 | HEAVYWEIGHT_HANDLER 0x5100 |
426 | HEAVYWEIGHT_HANDLER 0x5100 |
| 426 | HEAVYWEIGHT_HANDLER 0x5200 |
427 | HEAVYWEIGHT_HANDLER 0x5200 |
| 427 | HEAVYWEIGHT_HANDLER 0x5300 |
428 | HEAVYWEIGHT_HANDLER 0x5300 |
| 428 | HEAVYWEIGHT_HANDLER 0x5400 general_exception |
429 | HEAVYWEIGHT_HANDLER 0x5400 general_exception |
| 429 | HEAVYWEIGHT_HANDLER 0x5500 |
430 | HEAVYWEIGHT_HANDLER 0x5500 |
| 430 | HEAVYWEIGHT_HANDLER 0x5600 |
431 | HEAVYWEIGHT_HANDLER 0x5600 |
| 431 | HEAVYWEIGHT_HANDLER 0x5700 |
432 | HEAVYWEIGHT_HANDLER 0x5700 |
| 432 | HEAVYWEIGHT_HANDLER 0x5800 |
433 | HEAVYWEIGHT_HANDLER 0x5800 |
| 433 | HEAVYWEIGHT_HANDLER 0x5900 |
434 | HEAVYWEIGHT_HANDLER 0x5900 |
| 434 | HEAVYWEIGHT_HANDLER 0x5a00 |
435 | HEAVYWEIGHT_HANDLER 0x5a00 |
| 435 | HEAVYWEIGHT_HANDLER 0x5b00 |
436 | HEAVYWEIGHT_HANDLER 0x5b00 |
| 436 | HEAVYWEIGHT_HANDLER 0x5c00 |
437 | HEAVYWEIGHT_HANDLER 0x5c00 |
| 437 | HEAVYWEIGHT_HANDLER 0x5d00 |
438 | HEAVYWEIGHT_HANDLER 0x5d00 |
| 438 | HEAVYWEIGHT_HANDLER 0x5e00 |
439 | HEAVYWEIGHT_HANDLER 0x5e00 |
| 439 | HEAVYWEIGHT_HANDLER 0x5f00 |
440 | HEAVYWEIGHT_HANDLER 0x5f00 |
| 440 | 441 | ||
| 441 | HEAVYWEIGHT_HANDLER 0x6000 |
442 | HEAVYWEIGHT_HANDLER 0x6000 |
| 442 | HEAVYWEIGHT_HANDLER 0x6100 |
443 | HEAVYWEIGHT_HANDLER 0x6100 |
| 443 | HEAVYWEIGHT_HANDLER 0x6200 |
444 | HEAVYWEIGHT_HANDLER 0x6200 |
| 444 | HEAVYWEIGHT_HANDLER 0x6300 |
445 | HEAVYWEIGHT_HANDLER 0x6300 |
| 445 | HEAVYWEIGHT_HANDLER 0x6400 |
446 | HEAVYWEIGHT_HANDLER 0x6400 |
| 446 | HEAVYWEIGHT_HANDLER 0x6500 |
447 | HEAVYWEIGHT_HANDLER 0x6500 |
| 447 | HEAVYWEIGHT_HANDLER 0x6600 |
448 | HEAVYWEIGHT_HANDLER 0x6600 |
| 448 | HEAVYWEIGHT_HANDLER 0x6700 |
449 | HEAVYWEIGHT_HANDLER 0x6700 |
| 449 | HEAVYWEIGHT_HANDLER 0x6800 |
450 | HEAVYWEIGHT_HANDLER 0x6800 |
| 450 | HEAVYWEIGHT_HANDLER 0x6900 |
451 | HEAVYWEIGHT_HANDLER 0x6900 |
| 451 | HEAVYWEIGHT_HANDLER 0x6a00 |
452 | HEAVYWEIGHT_HANDLER 0x6a00 |
| 452 | HEAVYWEIGHT_HANDLER 0x6b00 |
453 | HEAVYWEIGHT_HANDLER 0x6b00 |
| 453 | HEAVYWEIGHT_HANDLER 0x6c00 |
454 | HEAVYWEIGHT_HANDLER 0x6c00 |
| 454 | HEAVYWEIGHT_HANDLER 0x6d00 |
455 | HEAVYWEIGHT_HANDLER 0x6d00 |
| 455 | HEAVYWEIGHT_HANDLER 0x6e00 |
456 | HEAVYWEIGHT_HANDLER 0x6e00 |
| 456 | HEAVYWEIGHT_HANDLER 0x6f00 |
457 | HEAVYWEIGHT_HANDLER 0x6f00 |
| 457 | 458 | ||
| 458 | HEAVYWEIGHT_HANDLER 0x7000 |
459 | HEAVYWEIGHT_HANDLER 0x7000 |
| 459 | HEAVYWEIGHT_HANDLER 0x7100 |
460 | HEAVYWEIGHT_HANDLER 0x7100 |
| 460 | HEAVYWEIGHT_HANDLER 0x7200 |
461 | HEAVYWEIGHT_HANDLER 0x7200 |
| 461 | HEAVYWEIGHT_HANDLER 0x7300 |
462 | HEAVYWEIGHT_HANDLER 0x7300 |
| 462 | HEAVYWEIGHT_HANDLER 0x7400 |
463 | HEAVYWEIGHT_HANDLER 0x7400 |
| 463 | HEAVYWEIGHT_HANDLER 0x7500 |
464 | HEAVYWEIGHT_HANDLER 0x7500 |
| 464 | HEAVYWEIGHT_HANDLER 0x7600 |
465 | HEAVYWEIGHT_HANDLER 0x7600 |
| 465 | HEAVYWEIGHT_HANDLER 0x7700 |
466 | HEAVYWEIGHT_HANDLER 0x7700 |
| 466 | HEAVYWEIGHT_HANDLER 0x7800 |
467 | HEAVYWEIGHT_HANDLER 0x7800 |
| 467 | HEAVYWEIGHT_HANDLER 0x7900 |
468 | HEAVYWEIGHT_HANDLER 0x7900 |
| 468 | HEAVYWEIGHT_HANDLER 0x7a00 |
469 | HEAVYWEIGHT_HANDLER 0x7a00 |
| 469 | HEAVYWEIGHT_HANDLER 0x7b00 |
470 | HEAVYWEIGHT_HANDLER 0x7b00 |
| 470 | HEAVYWEIGHT_HANDLER 0x7c00 |
471 | HEAVYWEIGHT_HANDLER 0x7c00 |
| 471 | HEAVYWEIGHT_HANDLER 0x7d00 |
472 | HEAVYWEIGHT_HANDLER 0x7d00 |
| 472 | HEAVYWEIGHT_HANDLER 0x7e00 |
473 | HEAVYWEIGHT_HANDLER 0x7e00 |
| 473 | HEAVYWEIGHT_HANDLER 0x7f00 |
474 | HEAVYWEIGHT_HANDLER 0x7f00 |
| 474 | 475 | ||