Rev 915 | Rev 919 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
| Rev 915 | Rev 916 | ||
|---|---|---|---|
| 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 14 |
35 | #define STACK_ITEMS 14 |
| 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_KSTACK_BSP r22 /* keep in sync with before_thread_runs_arch() */ |
|
| 48 | #define R_KSTACK r23 /* keep in sync with before_thread_runs_arch() */ |
49 | #define R_KSTACK r23 /* keep in sync with before_thread_runs_arch() */ |
| 49 | 50 | ||
| 50 | /** Heavyweight interrupt handler |
51 | /** Heavyweight interrupt handler |
| 51 | * |
52 | * |
| 52 | * This macro roughly follows steps from 1 to 19 described in |
53 | * This macro roughly follows steps from 1 to 19 described in |
| 53 | * Intel Itanium Architecture Software Developer's Manual, Chapter 3.4.2. |
54 | * Intel Itanium Architecture Software Developer's Manual, Chapter 3.4.2. |
| 54 | * |
55 | * |
| 55 | * HEAVYWEIGHT_HANDLER macro must cram into 16 bundles (48 instructions). |
56 | * HEAVYWEIGHT_HANDLER macro must cram into 16 bundles (48 instructions). |
| 56 | * This goal is achieved by using procedure calls after RSE becomes operational. |
57 | * This goal is achieved by using procedure calls after RSE becomes operational. |
| 57 | * |
58 | * |
| 58 | * Some steps are skipped (enabling and disabling interrupts). |
59 | * Some steps are skipped (enabling and disabling interrupts). |
| 59 | * Some steps are not fully supported yet (e.g. interruptions |
60 | * Some steps are not fully supported yet (e.g. dealing with floating-point |
| 60 | * from userspace and floating-point context). |
61 | * context). |
| 61 | * |
62 | * |
| 62 | * @param offs Offset from the beginning of IVT. |
63 | * @param offs Offset from the beginning of IVT. |
| 63 | * @param handler Interrupt handler address. |
64 | * @param handler Interrupt handler address. |
| 64 | */ |
65 | */ |
| 65 | .macro HEAVYWEIGHT_HANDLER offs, handler=universal_handler |
66 | .macro HEAVYWEIGHT_HANDLER offs, handler=universal_handler |
| 66 | .org ivt + \offs |
67 | .org ivt + \offs |
| 67 | mov R_OFFS = \offs |
68 | mov R_OFFS = \offs |
| 68 | movl R_HANDLER = \handler ;; |
69 | movl R_HANDLER = \handler ;; |
| 69 | br heavyweight_handler |
70 | br heavyweight_handler |
| 70 | .endm |
71 | .endm |
| 71 | 72 | ||
| 72 | .global heavyweight_handler |
73 | .global heavyweight_handler |
| 73 | heavyweight_handler: |
74 | heavyweight_handler: |
| 74 | /* 1. copy interrupt registers into bank 0 */ |
75 | /* 1. copy interrupt registers into bank 0 */ |
| 75 | 76 | ||
| 76 | /* |
77 | /* |
| 77 | * Note that r24-r31 from bank 0 can be used only as long as PSR.ic = 0. |
78 | * Note that r24-r31 from bank 0 can be used only as long as PSR.ic = 0. |
| 78 | */ |
79 | */ |
| 79 | mov r24 = cr.iip |
80 | mov r24 = cr.iip |
| 80 | mov r25 = cr.ipsr |
81 | mov r25 = cr.ipsr |
| 81 | mov r26 = cr.iipa |
82 | mov r26 = cr.iipa |
| 82 | mov r27 = cr.isr |
83 | mov r27 = cr.isr |
| 83 | mov r28 = cr.ifa |
84 | mov r28 = cr.ifa |
| 84 | 85 | ||
| 85 | /* 2. preserve predicate register into bank 0 */ |
86 | /* 2. preserve predicate register into bank 0 */ |
| 86 | mov r29 = pr ;; |
87 | mov r29 = pr ;; |
| 87 | 88 | ||
| 88 | /* 3. switch to kernel memory stack */ |
89 | /* 3. switch to kernel memory stack */ |
| 89 | mov r30 = cr.ipsr |
90 | mov r30 = cr.ipsr |
| 90 | shr.u r31 = r12, VRN_SHIFT ;; |
91 | shr.u r31 = r12, VRN_SHIFT ;; |
| - | 92 | ||
| - | 93 | shr.u r30 = r30, PSR_CPL_SHIFT ;; |
|
| - | 94 | and r30 = PSR_CPL_MASK_SHIFTED, r30 ;; |
|
| 91 | 95 | ||
| 92 | /* |
96 | /* |
| 93 | * Set p6 to true if the stack register references kernel address space. |
97 | * Set p3 to true if the interrupted context executed in kernel mode. |
| 94 | * Set p7 to false if the stack register doesn't reference kernel address space. |
98 | * Set p4 to false if the interrupted context didn't execute in kernel mode. |
| 95 | */ |
99 | */ |
| 96 | cmp.eq p6, p7 = VRN_KERNEL, r31 ;; |
100 | cmp.eq p3, p4 = r30, r0 ;; |
| 97 | - | ||
| 98 | (p6) shr.u r30 = r30, PSR_CPL_SHIFT ;; |
- | |
| 99 | (p6) and r30 = PSR_CPL_MASK_SHIFTED, r30 ;; |
101 | cmp.eq p1, p2 = r30, r0 ;; /* remember IPSR setting in p1 and p2 */ |
| 100 | 102 | ||
| 101 | /* |
103 | /* |
| 102 | * Set p6 to true if the interrupted context executed in kernel mode. |
104 | * Set p3 to true if the stack register references kernel address space. |
| 103 | * Set p7 to false if the interrupted context didn't execute in kernel mode. |
105 | * Set p4 to false if the stack register doesn't reference kernel address space. |
| 104 | */ |
106 | */ |
| 105 | (p6) cmp.eq p6, p7 = r30, r0 ;; |
107 | (p3) cmp.eq p3, p4 = VRN_KERNEL, r31 ;; |
| 106 | 108 | ||
| 107 | /* |
109 | /* |
| 108 | * Now, p7 is true iff the stack needs to be switched to kernel stack. |
110 | * Now, p4 is true iff the stack needs to be switched to kernel stack. |
| 109 | */ |
111 | */ |
| 110 | mov r30 = r12 |
112 | mov r30 = r12 |
| 111 | (p7) mov r12 = R_KSTACK ;; |
113 | (p4) mov r12 = R_KSTACK ;; |
| 112 | 114 | ||
| 113 | add r31 = -STACK_FRAME_BIAS, r12 ;; |
115 | add r31 = -STACK_FRAME_BIAS, r12 ;; |
| 114 | add r12 = -STACK_FRAME_SIZE, r12 |
116 | add r12 = -STACK_FRAME_SIZE, r12 |
| 115 | 117 | ||
| 116 | /* 4. save registers in bank 0 into memory stack */ |
118 | /* 4. save registers in bank 0 into memory stack */ |
| 117 | st8 [r31] = r30, -8 ;; /* save old stack pointer */ |
119 | st8 [r31] = r30, -8 ;; /* save old stack pointer */ |
| 118 | 120 | ||
| 119 | st8 [r31] = r29, -8 ;; /* save predicate registers */ |
121 | st8 [r31] = r29, -8 ;; /* save predicate registers */ |
| 120 | 122 | ||
| 121 | st8 [r31] = r24, -8 ;; /* save cr.iip */ |
123 | st8 [r31] = r24, -8 ;; /* save cr.iip */ |
| 122 | st8 [r31] = r25, -8 ;; /* save cr.ipsr */ |
124 | st8 [r31] = r25, -8 ;; /* save cr.ipsr */ |
| 123 | st8 [r31] = r26, -8 ;; /* save cr.iipa */ |
125 | st8 [r31] = r26, -8 ;; /* save cr.iipa */ |
| 124 | st8 [r31] = r27, -8 ;; /* save cr.isr */ |
126 | st8 [r31] = r27, -8 ;; /* save cr.isr */ |
| 125 | st8 [r31] = r28, -8 ;; /* save cr.ifa */ |
127 | st8 [r31] = r28, -8 ;; /* save cr.ifa */ |
| 126 | 128 | ||
| 127 | /* 5. RSE switch from interrupted context */ |
129 | /* 5. RSE switch from interrupted context */ |
| 128 | mov r24 = ar.rsc |
130 | mov r24 = ar.rsc |
| 129 | mov r25 = ar.pfs |
131 | mov r25 = ar.pfs |
| 130 | cover |
132 | cover |
| 131 | mov r26 = cr.ifs |
133 | mov r26 = cr.ifs |
| 132 | 134 | ||
| 133 | st8 [r31] = r24, -8 ;; /* save ar.rsc */ |
135 | st8 [r31] = r24, -8 ;; /* save ar.rsc */ |
| 134 | st8 [r31] = r25, -8 ;; /* save ar.pfs */ |
136 | st8 [r31] = r25, -8 ;; /* save ar.pfs */ |
| 135 | st8 [r31] = r26, -8 /* save ar.ifs */ |
137 | st8 [r31] = r26, -8 /* save ar.ifs */ |
| 136 | 138 | ||
| 137 | and r30 = ~3, r24 ;; |
139 | and r30 = ~3, r24 ;; |
| 138 | mov ar.rsc = r30 ;; /* place RSE in enforced lazy mode */ |
140 | mov ar.rsc = r30 ;; /* place RSE in enforced lazy mode */ |
| 139 | 141 | ||
| 140 | mov r27 = ar.rnat |
142 | mov r27 = ar.rnat |
| 141 | mov r28 = ar.bspstore ;; |
143 | mov r28 = ar.bspstore ;; |
| 142 | 144 | ||
| - | 145 | /* |
|
| - | 146 | * Inspect BSPSTORE to figure out whether it is necessary to switch to kernel BSPSTORE. |
|
| - | 147 | */ |
|
| 143 | /* assume kernel backing store */ |
148 | (p1) shr.u r30 = r28, VRN_SHIFT ;; |
| - | 149 | (p1) cmp.eq p1, p2 = VRN_KERNEL, r30 ;; |
|
| - | 150 | ||
| - | 151 | /* |
|
| - | 152 | * If BSPSTORE needs to be switched, p1 is false and p2 is true. |
|
| - | 153 | */ |
|
| - | 154 | (p1) mov r30 = r28 |
|
| - | 155 | (p2) mov r30 = R_KSTACK_BSP ;; |
|
| 144 | mov ar.bspstore = r28 ;; |
156 | (p2) mov ar.bspstore = r30 ;; |
| 145 | 157 | ||
| 146 | mov r29 = ar.bsp |
158 | mov r29 = ar.bsp |
| 147 | 159 | ||
| 148 | st8 [r31] = r27, -8 ;; /* save ar.rnat */ |
160 | st8 [r31] = r27, -8 ;; /* save ar.rnat */ |
| 149 | st8 [r31] = r28, -8 ;; /* save new value written to ar.bspstore */ |
161 | st8 [r31] = r30, -8 ;; /* save new value written to ar.bspstore */ |
| 150 | st8 [r31] = r28, -8 ;; /* save ar.bspstore */ |
162 | st8 [r31] = r28, -8 ;; /* save ar.bspstore */ |
| 151 | st8 [r31] = r29, -8 /* save ar.bsp */ |
163 | st8 [r31] = r29, -8 /* save ar.bsp */ |
| 152 | 164 | ||
| 153 | mov ar.rsc = r24 /* restore RSE's setting */ |
165 | mov ar.rsc = r24 /* restore RSE's setting */ |
| 154 | 166 | ||
| 155 | /* steps 6 - 15 are done by heavyweight_handler_inner() */ |
167 | /* steps 6 - 15 are done by heavyweight_handler_inner() */ |
| 156 | mov R_RET = b0 /* save b0 belonging to interrupted context */ |
168 | mov R_RET = b0 /* save b0 belonging to interrupted context */ |
| 157 | br.call.sptk.many b0 = heavyweight_handler_inner |
169 | br.call.sptk.many b0 = heavyweight_handler_inner |
| 158 | 0: mov b0 = R_RET /* restore b0 belonging to the interrupted context */ |
170 | 0: mov b0 = R_RET /* restore b0 belonging to the interrupted context */ |
| 159 | 171 | ||
| 160 | /* 16. RSE switch to interrupted context */ |
172 | /* 16. RSE switch to interrupted context */ |
| 161 | cover /* allocate zerro size frame (step 1 (from Intel Docs)) */ |
173 | cover /* allocate zerro size frame (step 1 (from Intel Docs)) */ |
| 162 | 174 | ||
| 163 | add r31 = STACK_SCRATCH_AREA_SIZE, r12 ;; |
175 | add r31 = STACK_SCRATCH_AREA_SIZE, r12 ;; |
| 164 | 176 | ||
| 165 | ld8 r30 = [r31], +8 ;; /* load ar.bsp */ |
177 | ld8 r30 = [r31], +8 ;; /* load ar.bsp */ |
| 166 | ld8 r29 = [r31], +8 ;; /* load ar.bspstore */ |
178 | ld8 r29 = [r31], +8 ;; /* load ar.bspstore */ |
| 167 | ld8 r28 = [r31], +8 ;; /* load ar.bspstore_new */ |
179 | ld8 r28 = [r31], +8 ;; /* load ar.bspstore_new */ |
| 168 | sub r27 = r30 , r28 ;; /* calculate loadrs (step 2) */ |
180 | sub r27 = r30 , r28 ;; /* calculate loadrs (step 2) */ |
| 169 | shl r27 = r27, 16 |
181 | shl r27 = r27, 16 |
| 170 | 182 | ||
| 171 | mov r24 = ar.rsc ;; |
183 | mov r24 = ar.rsc ;; |
| 172 | and r30 = ~3, r24 ;; |
184 | and r30 = ~3, r24 ;; |
| 173 | or r24 = r30 , r27 ;; |
185 | or r24 = r30 , r27 ;; |
| 174 | mov ar.rsc = r24 ;; /* place RSE in enforced lazy mode */ |
186 | mov ar.rsc = r24 ;; /* place RSE in enforced lazy mode */ |
| 175 | 187 | ||
| 176 | loadrs /* (step 3) */ |
188 | loadrs /* (step 3) */ |
| 177 | 189 | ||
| 178 | ld8 r27 = [r31], +8 ;; /* load ar.rnat */ |
190 | ld8 r27 = [r31], +8 ;; /* load ar.rnat */ |
| 179 | ld8 r26 = [r31], +8 ;; /* load cr.ifs */ |
191 | ld8 r26 = [r31], +8 ;; /* load cr.ifs */ |
| 180 | ld8 r25 = [r31], +8 ;; /* load ar.pfs */ |
192 | ld8 r25 = [r31], +8 ;; /* load ar.pfs */ |
| 181 | ld8 r24 = [r31], +8 ;; /* load ar.rsc */ |
193 | ld8 r24 = [r31], +8 ;; /* load ar.rsc */ |
| 182 | 194 | ||
| 183 | mov ar.bspstore = r29 ;; /* (step 4) */ |
195 | mov ar.bspstore = r29 ;; /* (step 4) */ |
| 184 | mov ar.rnat = r27 /* (step 5) */ |
196 | mov ar.rnat = r27 /* (step 5) */ |
| 185 | 197 | ||
| 186 | mov ar.pfs = r25 /* (step 6) */ |
198 | mov ar.pfs = r25 /* (step 6) */ |
| 187 | mov cr.ifs = r26 |
199 | mov cr.ifs = r26 |
| 188 | 200 | ||
| 189 | mov ar.rsc = r24 /* (step 7) */ |
201 | mov ar.rsc = r24 /* (step 7) */ |
| 190 | 202 | ||
| 191 | /* 17. restore interruption state from memory stack */ |
203 | /* 17. restore interruption state from memory stack */ |
| 192 | ld8 r28 = [r31], +8 ;; /* load cr.ifa */ |
204 | ld8 r28 = [r31], +8 ;; /* load cr.ifa */ |
| 193 | ld8 r27 = [r31], +8 ;; /* load cr.isr */ |
205 | ld8 r27 = [r31], +8 ;; /* load cr.isr */ |
| 194 | ld8 r26 = [r31], +8 ;; /* load cr.iipa */ |
206 | ld8 r26 = [r31], +8 ;; /* load cr.iipa */ |
| 195 | ld8 r25 = [r31], +8 ;; /* load cr.ipsr */ |
207 | ld8 r25 = [r31], +8 ;; /* load cr.ipsr */ |
| 196 | ld8 r24 = [r31], +8 ;; /* load cr.iip */ |
208 | ld8 r24 = [r31], +8 ;; /* load cr.iip */ |
| 197 | 209 | ||
| 198 | mov cr.iip = r24 |
210 | mov cr.iip = r24 |
| 199 | mov cr.ipsr = r25 |
211 | mov cr.ipsr = r25 |
| 200 | mov cr.iipa = r26 |
212 | mov cr.iipa = r26 |
| 201 | mov cr.isr = r27 |
213 | mov cr.isr = r27 |
| 202 | mov cr.ifa = r28 |
214 | mov cr.ifa = r28 |
| 203 | 215 | ||
| 204 | /* 18. restore predicate registers from memory stack */ |
216 | /* 18. restore predicate registers from memory stack */ |
| 205 | ld8 r29 = [r31], +8 ;; /* load predicate registers */ |
217 | ld8 r29 = [r31], +8 ;; /* load predicate registers */ |
| 206 | mov pr = r29 |
218 | mov pr = r29 |
| 207 | 219 | ||
| 208 | /* 19. return from interruption */ |
220 | /* 19. return from interruption */ |
| 209 | ld8 r12 = [r31] /* load stack pointer */ |
221 | ld8 r12 = [r31] /* load stack pointer */ |
| 210 | rfi ;; |
222 | rfi ;; |
| 211 | 223 | ||
| 212 | .global heavyweight_handler_inner |
224 | .global heavyweight_handler_inner |
| 213 | heavyweight_handler_inner: |
225 | heavyweight_handler_inner: |
| 214 | /* |
226 | /* |
| 215 | * From this point, the rest of the interrupted context |
227 | * From this point, the rest of the interrupted context |
| 216 | * will be preserved in stacked registers and backing store. |
228 | * will be preserved in stacked registers and backing store. |
| 217 | */ |
229 | */ |
| 218 | alloc loc0 = ar.pfs, 0, 47, 2, 0 ;; |
230 | alloc loc0 = ar.pfs, 0, 47, 2, 0 ;; |
| 219 | 231 | ||
| 220 | /* bank 0 is going to be shadowed, copy essential data from there */ |
232 | /* bank 0 is going to be shadowed, copy essential data from there */ |
| 221 | mov loc1 = R_RET /* b0 belonging to interrupted context */ |
233 | mov loc1 = R_RET /* b0 belonging to interrupted context */ |
| 222 | mov loc2 = R_HANDLER |
234 | mov loc2 = R_HANDLER |
| 223 | mov out0 = R_OFFS |
235 | mov out0 = R_OFFS |
| 224 | 236 | ||
| 225 | add out1 = STACK_SCRATCH_AREA_SIZE, r12 |
237 | add out1 = STACK_SCRATCH_AREA_SIZE, r12 |
| 226 | 238 | ||
| 227 | /* 6. switch to bank 1 and reenable PSR.ic */ |
239 | /* 6. switch to bank 1 and reenable PSR.ic */ |
| 228 | ssm PSR_IC_MASK |
240 | ssm PSR_IC_MASK |
| 229 | bsw.1 ;; |
241 | bsw.1 ;; |
| 230 | srlz.d |
242 | srlz.d |
| 231 | 243 | ||
| 232 | /* 7. preserve branch and application registers */ |
244 | /* 7. preserve branch and application registers */ |
| 233 | mov loc3 = ar.unat |
245 | mov loc3 = ar.unat |
| 234 | mov loc4 = ar.lc |
246 | mov loc4 = ar.lc |
| 235 | mov loc5 = ar.ec |
247 | mov loc5 = ar.ec |
| 236 | mov loc6 = ar.ccv |
248 | mov loc6 = ar.ccv |
| 237 | mov loc7 = ar.csd |
249 | mov loc7 = ar.csd |
| 238 | mov loc8 = ar.ssd |
250 | mov loc8 = ar.ssd |
| 239 | 251 | ||
| 240 | mov loc9 = b0 |
252 | mov loc9 = b0 |
| 241 | mov loc10 = b1 |
253 | mov loc10 = b1 |
| 242 | mov loc11 = b2 |
254 | mov loc11 = b2 |
| 243 | mov loc12 = b3 |
255 | mov loc12 = b3 |
| 244 | mov loc13 = b4 |
256 | mov loc13 = b4 |
| 245 | mov loc14 = b5 |
257 | mov loc14 = b5 |
| 246 | mov loc15 = b6 |
258 | mov loc15 = b6 |
| 247 | mov loc16 = b7 |
259 | mov loc16 = b7 |
| 248 | 260 | ||
| 249 | /* 8. preserve general and floating-point registers */ |
261 | /* 8. preserve general and floating-point registers */ |
| 250 | /* TODO: save floating-point context */ |
262 | /* TODO: save floating-point context */ |
| 251 | mov loc17 = r1 |
263 | mov loc17 = r1 |
| 252 | mov loc18 = r2 |
264 | mov loc18 = r2 |
| 253 | mov loc19 = r3 |
265 | mov loc19 = r3 |
| 254 | mov loc20 = r4 |
266 | mov loc20 = r4 |
| 255 | mov loc21 = r5 |
267 | mov loc21 = r5 |
| 256 | mov loc22 = r6 |
268 | mov loc22 = r6 |
| 257 | mov loc23 = r7 |
269 | mov loc23 = r7 |
| 258 | mov loc24 = r8 |
270 | mov loc24 = r8 |
| 259 | mov loc25 = r9 |
271 | mov loc25 = r9 |
| 260 | mov loc26 = r10 |
272 | mov loc26 = r10 |
| 261 | mov loc27 = r11 |
273 | mov loc27 = r11 |
| 262 | /* skip r12 (stack pointer) */ |
274 | /* skip r12 (stack pointer) */ |
| 263 | mov loc28 = r13 |
275 | mov loc28 = r13 |
| 264 | mov loc29 = r14 |
276 | mov loc29 = r14 |
| 265 | mov loc30 = r15 |
277 | mov loc30 = r15 |
| 266 | mov loc31 = r16 |
278 | mov loc31 = r16 |
| 267 | mov loc32 = r17 |
279 | mov loc32 = r17 |
| 268 | mov loc33 = r18 |
280 | mov loc33 = r18 |
| 269 | mov loc34 = r19 |
281 | mov loc34 = r19 |
| 270 | mov loc35 = r20 |
282 | mov loc35 = r20 |
| 271 | mov loc36 = r21 |
283 | mov loc36 = r21 |
| 272 | mov loc37 = r22 |
284 | mov loc37 = r22 |
| 273 | mov loc38 = r23 |
285 | mov loc38 = r23 |
| 274 | mov loc39 = r24 |
286 | mov loc39 = r24 |
| 275 | mov loc40 = r25 |
287 | mov loc40 = r25 |
| 276 | mov loc41 = r26 |
288 | mov loc41 = r26 |
| 277 | mov loc42 = r27 |
289 | mov loc42 = r27 |
| 278 | mov loc43 = r28 |
290 | mov loc43 = r28 |
| 279 | mov loc44 = r29 |
291 | mov loc44 = r29 |
| 280 | mov loc45 = r30 |
292 | mov loc45 = r30 |
| 281 | mov loc46 = r31 |
293 | mov loc46 = r31 |
| 282 | 294 | ||
| 283 | /* 9. skipped (will not enable interrupts) */ |
295 | /* 9. skipped (will not enable interrupts) */ |
| 284 | /* |
296 | /* |
| 285 | * ssm PSR_I_MASK |
297 | * ssm PSR_I_MASK |
| 286 | * ;; |
298 | * ;; |
| 287 | * srlz.d |
299 | * srlz.d |
| 288 | */ |
300 | */ |
| 289 | 301 | ||
| 290 | /* 10. call handler */ |
302 | /* 10. call handler */ |
| 291 | mov b1 = loc2 |
303 | mov b1 = loc2 |
| 292 | br.call.sptk.many b0 = b1 |
304 | br.call.sptk.many b0 = b1 |
| 293 | 305 | ||
| 294 | /* 11. return from handler */ |
306 | /* 11. return from handler */ |
| 295 | 0: |
307 | 0: |
| 296 | 308 | ||
| 297 | /* 12. skipped (will not disable interrupts) */ |
309 | /* 12. skipped (will not disable interrupts) */ |
| 298 | /* |
310 | /* |
| 299 | * rsm PSR_I_MASK |
311 | * rsm PSR_I_MASK |
| 300 | * ;; |
312 | * ;; |
| 301 | * srlz.d |
313 | * srlz.d |
| 302 | */ |
314 | */ |
| 303 | 315 | ||
| 304 | /* 13. restore general and floating-point registers */ |
316 | /* 13. restore general and floating-point registers */ |
| 305 | /* TODO: restore floating-point context */ |
317 | /* TODO: restore floating-point context */ |
| 306 | mov r1 = loc17 |
318 | mov r1 = loc17 |
| 307 | mov r2 = loc18 |
319 | mov r2 = loc18 |
| 308 | mov r3 = loc19 |
320 | mov r3 = loc19 |
| 309 | mov r4 = loc20 |
321 | mov r4 = loc20 |
| 310 | mov r5 = loc21 |
322 | mov r5 = loc21 |
| 311 | mov r6 = loc22 |
323 | mov r6 = loc22 |
| 312 | mov r7 = loc23 |
324 | mov r7 = loc23 |
| 313 | mov r8 = loc24 |
325 | mov r8 = loc24 |
| 314 | mov r9 = loc25 |
326 | mov r9 = loc25 |
| 315 | mov r10 = loc26 |
327 | mov r10 = loc26 |
| 316 | mov r11 = loc27 |
328 | mov r11 = loc27 |
| 317 | /* skip r12 (stack pointer) */ |
329 | /* skip r12 (stack pointer) */ |
| 318 | mov r13 = loc28 |
330 | mov r13 = loc28 |
| 319 | mov r14 = loc29 |
331 | mov r14 = loc29 |
| 320 | mov r15 = loc30 |
332 | mov r15 = loc30 |
| 321 | mov r16 = loc31 |
333 | mov r16 = loc31 |
| 322 | mov r17 = loc32 |
334 | mov r17 = loc32 |
| 323 | mov r18 = loc33 |
335 | mov r18 = loc33 |
| 324 | mov r19 = loc34 |
336 | mov r19 = loc34 |
| 325 | mov r20 = loc35 |
337 | mov r20 = loc35 |
| 326 | mov r21 = loc36 |
338 | mov r21 = loc36 |
| 327 | mov r22 = loc37 |
339 | mov r22 = loc37 |
| 328 | mov r23 = loc38 |
340 | mov r23 = loc38 |
| 329 | mov r24 = loc39 |
341 | mov r24 = loc39 |
| 330 | mov r25 = loc40 |
342 | mov r25 = loc40 |
| 331 | mov r26 = loc41 |
343 | mov r26 = loc41 |
| 332 | mov r27 = loc42 |
344 | mov r27 = loc42 |
| 333 | mov r28 = loc43 |
345 | mov r28 = loc43 |
| 334 | mov r29 = loc44 |
346 | mov r29 = loc44 |
| 335 | mov r30 = loc45 |
347 | mov r30 = loc45 |
| 336 | mov r31 = loc46 |
348 | mov r31 = loc46 |
| 337 | 349 | ||
| 338 | /* 14. restore branch and application registers */ |
350 | /* 14. restore branch and application registers */ |
| 339 | mov ar.unat = loc3 |
351 | mov ar.unat = loc3 |
| 340 | mov ar.lc = loc4 |
352 | mov ar.lc = loc4 |
| 341 | mov ar.ec = loc5 |
353 | mov ar.ec = loc5 |
| 342 | mov ar.ccv = loc6 |
354 | mov ar.ccv = loc6 |
| 343 | mov ar.csd = loc7 |
355 | mov ar.csd = loc7 |
| 344 | mov ar.ssd = loc8 |
356 | mov ar.ssd = loc8 |
| 345 | 357 | ||
| 346 | mov b0 = loc9 |
358 | mov b0 = loc9 |
| 347 | mov b1 = loc10 |
359 | mov b1 = loc10 |
| 348 | mov b2 = loc11 |
360 | mov b2 = loc11 |
| 349 | mov b3 = loc12 |
361 | mov b3 = loc12 |
| 350 | mov b4 = loc13 |
362 | mov b4 = loc13 |
| 351 | mov b5 = loc14 |
363 | mov b5 = loc14 |
| 352 | mov b6 = loc15 |
364 | mov b6 = loc15 |
| 353 | mov b7 = loc16 |
365 | mov b7 = loc16 |
| 354 | 366 | ||
| 355 | /* 15. disable PSR.ic and switch to bank 0 */ |
367 | /* 15. disable PSR.ic and switch to bank 0 */ |
| 356 | rsm PSR_IC_MASK |
368 | rsm PSR_IC_MASK |
| 357 | bsw.0 ;; |
369 | bsw.0 ;; |
| 358 | srlz.d |
370 | srlz.d |
| 359 | 371 | ||
| 360 | mov R_RET = loc1 |
372 | mov R_RET = loc1 |
| 361 | mov ar.pfs = loc0 |
373 | mov ar.pfs = loc0 |
| 362 | br.ret.sptk.many b0 |
374 | br.ret.sptk.many b0 |
| 363 | 375 | ||
| 364 | .global ivt |
376 | .global ivt |
| 365 | .align 32768 |
377 | .align 32768 |
| 366 | ivt: |
378 | ivt: |
| 367 | HEAVYWEIGHT_HANDLER 0x0000 |
379 | HEAVYWEIGHT_HANDLER 0x0000 |
| 368 | HEAVYWEIGHT_HANDLER 0x0400 |
380 | HEAVYWEIGHT_HANDLER 0x0400 |
| 369 | HEAVYWEIGHT_HANDLER 0x0800 |
381 | HEAVYWEIGHT_HANDLER 0x0800 |
| 370 | HEAVYWEIGHT_HANDLER 0x0c00 alternate_instruction_tlb_fault |
382 | HEAVYWEIGHT_HANDLER 0x0c00 alternate_instruction_tlb_fault |
| 371 | HEAVYWEIGHT_HANDLER 0x1000 alternate_data_tlb_fault |
383 | HEAVYWEIGHT_HANDLER 0x1000 alternate_data_tlb_fault |
| 372 | HEAVYWEIGHT_HANDLER 0x1400 data_nested_tlb_fault |
384 | HEAVYWEIGHT_HANDLER 0x1400 data_nested_tlb_fault |
| 373 | HEAVYWEIGHT_HANDLER 0x1800 |
385 | HEAVYWEIGHT_HANDLER 0x1800 |
| 374 | HEAVYWEIGHT_HANDLER 0x1c00 |
386 | HEAVYWEIGHT_HANDLER 0x1c00 |
| 375 | HEAVYWEIGHT_HANDLER 0x2000 data_dirty_bit_fault |
387 | HEAVYWEIGHT_HANDLER 0x2000 data_dirty_bit_fault |
| 376 | HEAVYWEIGHT_HANDLER 0x2400 instruction_access_bit_fault |
388 | HEAVYWEIGHT_HANDLER 0x2400 instruction_access_bit_fault |
| 377 | HEAVYWEIGHT_HANDLER 0x2800 data_access_bit_fault |
389 | HEAVYWEIGHT_HANDLER 0x2800 data_access_bit_fault |
| 378 | HEAVYWEIGHT_HANDLER 0x2c00 break_instruction |
390 | HEAVYWEIGHT_HANDLER 0x2c00 break_instruction |
| 379 | HEAVYWEIGHT_HANDLER 0x3000 external_interrupt /* For external interrupt, heavyweight handler is used. */ |
391 | HEAVYWEIGHT_HANDLER 0x3000 external_interrupt /* For external interrupt, heavyweight handler is used. */ |
| 380 | HEAVYWEIGHT_HANDLER 0x3400 |
392 | HEAVYWEIGHT_HANDLER 0x3400 |
| 381 | HEAVYWEIGHT_HANDLER 0x3800 |
393 | HEAVYWEIGHT_HANDLER 0x3800 |
| 382 | HEAVYWEIGHT_HANDLER 0x3c00 |
394 | HEAVYWEIGHT_HANDLER 0x3c00 |
| 383 | HEAVYWEIGHT_HANDLER 0x4000 |
395 | HEAVYWEIGHT_HANDLER 0x4000 |
| 384 | HEAVYWEIGHT_HANDLER 0x4400 |
396 | HEAVYWEIGHT_HANDLER 0x4400 |
| 385 | HEAVYWEIGHT_HANDLER 0x4800 |
397 | HEAVYWEIGHT_HANDLER 0x4800 |
| 386 | HEAVYWEIGHT_HANDLER 0x4c00 |
398 | HEAVYWEIGHT_HANDLER 0x4c00 |
| 387 | 399 | ||
| 388 | HEAVYWEIGHT_HANDLER 0x5000 page_not_present |
400 | HEAVYWEIGHT_HANDLER 0x5000 page_not_present |
| 389 | HEAVYWEIGHT_HANDLER 0x5100 |
401 | HEAVYWEIGHT_HANDLER 0x5100 |
| 390 | HEAVYWEIGHT_HANDLER 0x5200 |
402 | HEAVYWEIGHT_HANDLER 0x5200 |
| 391 | HEAVYWEIGHT_HANDLER 0x5300 |
403 | HEAVYWEIGHT_HANDLER 0x5300 |
| 392 | HEAVYWEIGHT_HANDLER 0x5400 general_exception |
404 | HEAVYWEIGHT_HANDLER 0x5400 general_exception |
| 393 | HEAVYWEIGHT_HANDLER 0x5500 |
405 | HEAVYWEIGHT_HANDLER 0x5500 |
| 394 | HEAVYWEIGHT_HANDLER 0x5600 |
406 | HEAVYWEIGHT_HANDLER 0x5600 |
| 395 | HEAVYWEIGHT_HANDLER 0x5700 |
407 | HEAVYWEIGHT_HANDLER 0x5700 |
| 396 | HEAVYWEIGHT_HANDLER 0x5800 |
408 | HEAVYWEIGHT_HANDLER 0x5800 |
| 397 | HEAVYWEIGHT_HANDLER 0x5900 |
409 | HEAVYWEIGHT_HANDLER 0x5900 |
| 398 | HEAVYWEIGHT_HANDLER 0x5a00 |
410 | HEAVYWEIGHT_HANDLER 0x5a00 |
| 399 | HEAVYWEIGHT_HANDLER 0x5b00 |
411 | HEAVYWEIGHT_HANDLER 0x5b00 |
| 400 | HEAVYWEIGHT_HANDLER 0x5c00 |
412 | HEAVYWEIGHT_HANDLER 0x5c00 |
| 401 | HEAVYWEIGHT_HANDLER 0x5d00 |
413 | HEAVYWEIGHT_HANDLER 0x5d00 |
| 402 | HEAVYWEIGHT_HANDLER 0x5e00 |
414 | HEAVYWEIGHT_HANDLER 0x5e00 |
| 403 | HEAVYWEIGHT_HANDLER 0x5f00 |
415 | HEAVYWEIGHT_HANDLER 0x5f00 |
| 404 | 416 | ||
| 405 | HEAVYWEIGHT_HANDLER 0x6000 |
417 | HEAVYWEIGHT_HANDLER 0x6000 |
| 406 | HEAVYWEIGHT_HANDLER 0x6100 |
418 | HEAVYWEIGHT_HANDLER 0x6100 |
| 407 | HEAVYWEIGHT_HANDLER 0x6200 |
419 | HEAVYWEIGHT_HANDLER 0x6200 |
| 408 | HEAVYWEIGHT_HANDLER 0x6300 |
420 | HEAVYWEIGHT_HANDLER 0x6300 |
| 409 | HEAVYWEIGHT_HANDLER 0x6400 |
421 | HEAVYWEIGHT_HANDLER 0x6400 |
| 410 | HEAVYWEIGHT_HANDLER 0x6500 |
422 | HEAVYWEIGHT_HANDLER 0x6500 |
| 411 | HEAVYWEIGHT_HANDLER 0x6600 |
423 | HEAVYWEIGHT_HANDLER 0x6600 |
| 412 | HEAVYWEIGHT_HANDLER 0x6700 |
424 | HEAVYWEIGHT_HANDLER 0x6700 |
| 413 | HEAVYWEIGHT_HANDLER 0x6800 |
425 | HEAVYWEIGHT_HANDLER 0x6800 |
| 414 | HEAVYWEIGHT_HANDLER 0x6900 |
426 | HEAVYWEIGHT_HANDLER 0x6900 |
| 415 | HEAVYWEIGHT_HANDLER 0x6a00 |
427 | HEAVYWEIGHT_HANDLER 0x6a00 |
| 416 | HEAVYWEIGHT_HANDLER 0x6b00 |
428 | HEAVYWEIGHT_HANDLER 0x6b00 |
| 417 | HEAVYWEIGHT_HANDLER 0x6c00 |
429 | HEAVYWEIGHT_HANDLER 0x6c00 |
| 418 | HEAVYWEIGHT_HANDLER 0x6d00 |
430 | HEAVYWEIGHT_HANDLER 0x6d00 |
| 419 | HEAVYWEIGHT_HANDLER 0x6e00 |
431 | HEAVYWEIGHT_HANDLER 0x6e00 |
| 420 | HEAVYWEIGHT_HANDLER 0x6f00 |
432 | HEAVYWEIGHT_HANDLER 0x6f00 |
| 421 | 433 | ||
| 422 | HEAVYWEIGHT_HANDLER 0x7000 |
434 | HEAVYWEIGHT_HANDLER 0x7000 |
| 423 | HEAVYWEIGHT_HANDLER 0x7100 |
435 | HEAVYWEIGHT_HANDLER 0x7100 |
| 424 | HEAVYWEIGHT_HANDLER 0x7200 |
436 | HEAVYWEIGHT_HANDLER 0x7200 |
| 425 | HEAVYWEIGHT_HANDLER 0x7300 |
437 | HEAVYWEIGHT_HANDLER 0x7300 |
| 426 | HEAVYWEIGHT_HANDLER 0x7400 |
438 | HEAVYWEIGHT_HANDLER 0x7400 |
| 427 | HEAVYWEIGHT_HANDLER 0x7500 |
439 | HEAVYWEIGHT_HANDLER 0x7500 |
| 428 | HEAVYWEIGHT_HANDLER 0x7600 |
440 | HEAVYWEIGHT_HANDLER 0x7600 |
| 429 | HEAVYWEIGHT_HANDLER 0x7700 |
441 | HEAVYWEIGHT_HANDLER 0x7700 |
| 430 | HEAVYWEIGHT_HANDLER 0x7800 |
442 | HEAVYWEIGHT_HANDLER 0x7800 |
| 431 | HEAVYWEIGHT_HANDLER 0x7900 |
443 | HEAVYWEIGHT_HANDLER 0x7900 |
| 432 | HEAVYWEIGHT_HANDLER 0x7a00 |
444 | HEAVYWEIGHT_HANDLER 0x7a00 |
| 433 | HEAVYWEIGHT_HANDLER 0x7b00 |
445 | HEAVYWEIGHT_HANDLER 0x7b00 |
| 434 | HEAVYWEIGHT_HANDLER 0x7c00 |
446 | HEAVYWEIGHT_HANDLER 0x7c00 |
| 435 | HEAVYWEIGHT_HANDLER 0x7d00 |
447 | HEAVYWEIGHT_HANDLER 0x7d00 |
| 436 | HEAVYWEIGHT_HANDLER 0x7e00 |
448 | HEAVYWEIGHT_HANDLER 0x7e00 |
| 437 | HEAVYWEIGHT_HANDLER 0x7f00 |
449 | HEAVYWEIGHT_HANDLER 0x7f00 |
| 438 | 450 | ||