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review.evervolv.com / android_kernel_htc_msm8960 / 01c8c57d668d94f1036d9ab11a22aa24ca16a35d / . / arch / frv / kernel / entry-table.S
blob: bf35f33e48c99d6c18152184ee9b79af34d4d63f [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/* entry-table.S: main trap vector tables and exception jump table
2 *
3 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
13#include <linux/sys.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]14#include <linux/linkage.h>
15#include <asm/spr-regs.h>
16
17###############################################################################
18#
19# Declare the main trap and vector tables
20#
21# There are six tables:
22#
23# (1) The trap table for debug mode
24# (2) The trap table for kernel mode
25# (3) The trap table for user mode
26#
27# The CPU jumps to an appropriate slot in the appropriate table to perform
28# exception processing. We have three different tables for the three
29# different CPU modes because there is no hardware differentiation between
30# stack pointers for these three modes, and so we have to invent one when
31# crossing mode boundaries.
32#
33# (4) The exception handler vector table
34#
35# The user and kernel trap tables use the same prologue for normal
36# exception processing. The prologue then jumps to the handler in this
37# table, as indexed by the exception ID from the TBR.
38#
39# (5) The fixup table for kernel-trap single-step
40# (6) The fixup table for user-trap single-step
41#
42# Due to the way single-stepping works on this CPU (single-step is not
43# disabled when crossing exception boundaries, only when in debug mode),
44# we have to catch the single-step event in break.S and jump to the fixup
45# routine pointed to by this table.
46#
47# The linker script places the user mode and kernel mode trap tables on to
48# the same 8Kb page, so that break.S can be more efficient when performing
49# single-step bypass management
50#
51###############################################################################
52
53 # trap table for entry from debug mode
54 .section .trap.break,"ax"
55 .balign 256*16
56 .globl __entry_breaktrap_table
57__entry_breaktrap_table:
58
59 # trap table for entry from user mode
60 .section .trap.user,"ax"
61 .balign 256*16
62 .globl __entry_usertrap_table
63__entry_usertrap_table:
64
65 # trap table for entry from kernel mode
66 .section .trap.kernel,"ax"
67 .balign 256*16
68 .globl __entry_kerneltrap_table
69__entry_kerneltrap_table:
70
71 # exception handler jump table
72 .section .trap.vector,"ax"
73 .balign 256*4
74 .globl __entry_vector_table
75__entry_vector_table:
76
77 # trap fixup table for single-stepping in user mode
78 .section .trap.fixup.user,"a"
79 .balign 256*4
80 .globl __break_usertrap_fixup_table
81__break_usertrap_fixup_table:
82
83 # trap fixup table for single-stepping in user mode
84 .section .trap.fixup.kernel,"a"
85 .balign 256*4
86 .globl __break_kerneltrap_fixup_table
87__break_kerneltrap_fixup_table:
88
89 # handler declaration for a sofware or program interrupt
90.macro VECTOR_SOFTPROG tbr_tt, vec
91 .section .trap.user
92 .org \tbr_tt
93 bra __entry_uspace_softprog_interrupt
94 .section .trap.fixup.user
95 .org \tbr_tt >> 2
96 .long __break_step_uspace_softprog_interrupt
97 .section .trap.kernel
98 .org \tbr_tt
99 bra __entry_kernel_softprog_interrupt
100 .section .trap.fixup.kernel
101 .org \tbr_tt >> 2
102 .long __break_step_kernel_softprog_interrupt
103 .section .trap.vector
104 .org \tbr_tt >> 2
105 .long \vec
106.endm
107
108 # handler declaration for a maskable external interrupt
109.macro VECTOR_IRQ tbr_tt, vec
110 .section .trap.user
111 .org \tbr_tt
112 bra __entry_uspace_external_interrupt
113 .section .trap.fixup.user
114 .org \tbr_tt >> 2
115 .long __break_step_uspace_external_interrupt
116 .section .trap.kernel
117 .org \tbr_tt
David Howells28baeba2006-02-14 13:53:20 -0800[diff] [blame]118 # deal with virtual interrupt disablement
119 beq icc2,#0,__entry_kernel_external_interrupt_virtually_disabled
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]120 bra __entry_kernel_external_interrupt
121 .section .trap.fixup.kernel
122 .org \tbr_tt >> 2
123 .long __break_step_kernel_external_interrupt
124 .section .trap.vector
125 .org \tbr_tt >> 2
126 .long \vec
127.endm
128
129 # handler declaration for an NMI external interrupt
130.macro VECTOR_NMI tbr_tt, vec
131 .section .trap.user
132 .org \tbr_tt
133 break
134 break
135 break
136 break
137 .section .trap.kernel
138 .org \tbr_tt
139 break
140 break
141 break
142 break
143 .section .trap.vector
144 .org \tbr_tt >> 2
145 .long \vec
146.endm
147
148 # handler declaration for an MMU only sofware or program interrupt
149.macro VECTOR_SP_MMU tbr_tt, vec
150#ifdef CONFIG_MMU
151 VECTOR_SOFTPROG \tbr_tt, \vec
152#else
153 VECTOR_NMI \tbr_tt, 0
154#endif
155.endm
156
157
158###############################################################################
159#
160# specification of the vectors
161# - note: each macro inserts code into multiple sections
162#
163###############################################################################
164 VECTOR_SP_MMU TBR_TT_INSTR_MMU_MISS, __entry_insn_mmu_miss
165 VECTOR_SOFTPROG TBR_TT_INSTR_ACC_ERROR, __entry_insn_access_error
166 VECTOR_SOFTPROG TBR_TT_INSTR_ACC_EXCEP, __entry_insn_access_exception
167 VECTOR_SOFTPROG TBR_TT_PRIV_INSTR, __entry_privileged_instruction
168 VECTOR_SOFTPROG TBR_TT_ILLEGAL_INSTR, __entry_illegal_instruction
169 VECTOR_SOFTPROG TBR_TT_FP_EXCEPTION, __entry_media_exception
170 VECTOR_SOFTPROG TBR_TT_MP_EXCEPTION, __entry_media_exception
171 VECTOR_SOFTPROG TBR_TT_DATA_ACC_ERROR, __entry_data_access_error
172 VECTOR_SP_MMU TBR_TT_DATA_MMU_MISS, __entry_data_mmu_miss
173 VECTOR_SOFTPROG TBR_TT_DATA_ACC_EXCEP, __entry_data_access_exception
174 VECTOR_SOFTPROG TBR_TT_DATA_STR_ERROR, __entry_data_store_error
175 VECTOR_SOFTPROG TBR_TT_DIVISION_EXCEP, __entry_division_exception
176
177#ifdef CONFIG_MMU
178 .section .trap.user
179 .org TBR_TT_INSTR_TLB_MISS
180 .globl __trap_user_insn_tlb_miss
181__trap_user_insn_tlb_miss:
182 movsg ear0,gr28 /* faulting address */
183 movsg scr0,gr31 /* get mapped PTD coverage start address */
184 xor.p gr28,gr31,gr31 /* compare addresses */
185 bra __entry_user_insn_tlb_miss
186
187 .org TBR_TT_DATA_TLB_MISS
188 .globl __trap_user_data_tlb_miss
189__trap_user_data_tlb_miss:
190 movsg ear0,gr28 /* faulting address */
191 movsg scr1,gr31 /* get mapped PTD coverage start address */
192 xor.p gr28,gr31,gr31 /* compare addresses */
193 bra __entry_user_data_tlb_miss
194
195 .section .trap.kernel
196 .org TBR_TT_INSTR_TLB_MISS
197 .globl __trap_kernel_insn_tlb_miss
198__trap_kernel_insn_tlb_miss:
199 movsg ear0,gr29 /* faulting address */
200 movsg scr0,gr31 /* get mapped PTD coverage start address */
201 xor.p gr29,gr31,gr31 /* compare addresses */
202 bra __entry_kernel_insn_tlb_miss
203
204 .org TBR_TT_DATA_TLB_MISS
205 .globl __trap_kernel_data_tlb_miss
206__trap_kernel_data_tlb_miss:
207 movsg ear0,gr29 /* faulting address */
208 movsg scr1,gr31 /* get mapped PTD coverage start address */
209 xor.p gr29,gr31,gr31 /* compare addresses */
210 bra __entry_kernel_data_tlb_miss
211
212 .section .trap.fixup.user
213 .org TBR_TT_INSTR_TLB_MISS >> 2
214 .globl __trap_fixup_user_insn_tlb_miss
215__trap_fixup_user_insn_tlb_miss:
216 .long __break_user_insn_tlb_miss
217 .org TBR_TT_DATA_TLB_MISS >> 2
218 .globl __trap_fixup_user_data_tlb_miss
219__trap_fixup_user_data_tlb_miss:
220 .long __break_user_data_tlb_miss
221
222 .section .trap.fixup.kernel
223 .org TBR_TT_INSTR_TLB_MISS >> 2
224 .globl __trap_fixup_kernel_insn_tlb_miss
225__trap_fixup_kernel_insn_tlb_miss:
226 .long __break_kernel_insn_tlb_miss
227 .org TBR_TT_DATA_TLB_MISS >> 2
228 .globl __trap_fixup_kernel_data_tlb_miss
229__trap_fixup_kernel_data_tlb_miss:
230 .long __break_kernel_data_tlb_miss
231
232 .section .trap.vector
233 .org TBR_TT_INSTR_TLB_MISS >> 2
234 .long __entry_insn_mmu_fault
235 .org TBR_TT_DATA_TLB_MISS >> 2
236 .long __entry_data_mmu_fault
237#endif
238
239 VECTOR_SP_MMU TBR_TT_DATA_DAT_EXCEP, __entry_data_dat_fault
240 VECTOR_NMI TBR_TT_DECREMENT_TIMER, __entry_do_NMI
241 VECTOR_SOFTPROG TBR_TT_COMPOUND_EXCEP, __entry_compound_exception
242 VECTOR_IRQ TBR_TT_INTERRUPT_1, __entry_do_IRQ
243 VECTOR_IRQ TBR_TT_INTERRUPT_2, __entry_do_IRQ
244 VECTOR_IRQ TBR_TT_INTERRUPT_3, __entry_do_IRQ
245 VECTOR_IRQ TBR_TT_INTERRUPT_4, __entry_do_IRQ
246 VECTOR_IRQ TBR_TT_INTERRUPT_5, __entry_do_IRQ
247 VECTOR_IRQ TBR_TT_INTERRUPT_6, __entry_do_IRQ
248 VECTOR_IRQ TBR_TT_INTERRUPT_7, __entry_do_IRQ
249 VECTOR_IRQ TBR_TT_INTERRUPT_8, __entry_do_IRQ
250 VECTOR_IRQ TBR_TT_INTERRUPT_9, __entry_do_IRQ
251 VECTOR_IRQ TBR_TT_INTERRUPT_10, __entry_do_IRQ
252 VECTOR_IRQ TBR_TT_INTERRUPT_11, __entry_do_IRQ
253 VECTOR_IRQ TBR_TT_INTERRUPT_12, __entry_do_IRQ
254 VECTOR_IRQ TBR_TT_INTERRUPT_13, __entry_do_IRQ
255 VECTOR_IRQ TBR_TT_INTERRUPT_14, __entry_do_IRQ
256 VECTOR_NMI TBR_TT_INTERRUPT_15, __entry_do_NMI
257
258 # miscellaneous user mode entry points
259 .section .trap.user
260 .org TBR_TT_TRAP0
261 .rept 127
262 bra __entry_uspace_softprog_interrupt
David Howells28baeba2006-02-14 13:53:20 -0800[diff] [blame]263 .long 0,0,0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]264 .endr
265 .org TBR_TT_BREAK
266 bra __entry_break
267 .long 0,0,0
268
David Howells28baeba2006-02-14 13:53:20 -0800[diff] [blame]269 .section .trap.fixup.user
270 .org TBR_TT_TRAP0 >> 2
271 .rept 127
272 .long __break_step_uspace_softprog_interrupt
273 .endr
274 .org TBR_TT_BREAK >> 2
275 .long 0
276
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]277 # miscellaneous kernel mode entry points
278 .section .trap.kernel
279 .org TBR_TT_TRAP0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]280 bra __entry_kernel_softprog_interrupt
David Howells28baeba2006-02-14 13:53:20 -0800[diff] [blame]281 .org TBR_TT_TRAP1
282 bra __entry_kernel_softprog_interrupt
283
284 # trap #2 in kernel - reenable interrupts
285 .org TBR_TT_TRAP2
286 bra __entry_kernel_external_interrupt_virtual_reenable
287
288 # miscellaneous kernel traps
289 .org TBR_TT_TRAP3
290 .rept 124
291 bra __entry_kernel_softprog_interrupt
292 .long 0,0,0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]293 .endr
294 .org TBR_TT_BREAK
295 bra __entry_break
296 .long 0,0,0
297
David Howells28baeba2006-02-14 13:53:20 -0800[diff] [blame]298 .section .trap.fixup.kernel
299 .org TBR_TT_TRAP0 >> 2
300 .long __break_step_kernel_softprog_interrupt
301 .long __break_step_kernel_softprog_interrupt
302 .long __break_step_kernel_external_interrupt_virtual_reenable
303 .rept 124
304 .long __break_step_kernel_softprog_interrupt
305 .endr
306 .org TBR_TT_BREAK >> 2
307 .long 0
308
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]309 # miscellaneous debug mode entry points
310 .section .trap.break
311 .org TBR_TT_BREAK
312 movsg bpcsr,gr30
313 jmpl @(gr30,gr0)
314
315 # miscellaneous vectors
316 .section .trap.vector
317 .org TBR_TT_TRAP0 >> 2
318 .long system_call
David Howellse31c2432008-04-10 16:10:55 +0100[diff] [blame]319 .rept 119
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]320 .long __entry_unsupported_trap
321 .endr
David Howellse31c2432008-04-10 16:10:55 +0100[diff] [blame]322
323 # userspace atomic op emulation, traps 120-126
324 .rept 7
325 .long __entry_atomic_op
326 .endr
327
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]328 .org TBR_TT_BREAK >> 2
329 .long __entry_debug_exception