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authorYoshinori Sato <ysato@users.sourceforge.jp>2007-07-16 02:38:36 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-16 12:05:37 -0400
commit2fea299f74c846157b068be8ae15b406db0719d9 (patch)
tree649ee49eb7568927f2379f9ea2d213f2ec40e873 /arch/h8300/platform/h8s
parent542f739d12159e3198611aa471359cc63600be1a (diff)
h8300 entry.S update
Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/h8300/platform/h8s')
-rw-r--r--arch/h8300/platform/h8s/Makefile2
-rw-r--r--arch/h8300/platform/h8s/entry.S331
2 files changed, 1 insertions, 332 deletions
diff --git a/arch/h8300/platform/h8s/Makefile b/arch/h8300/platform/h8s/Makefile
index 0847b15d4256..bf1241883766 100644
--- a/arch/h8300/platform/h8s/Makefile
+++ b/arch/h8300/platform/h8s/Makefile
@@ -4,4 +4,4 @@
4# Reuse any files we can from the H8S 4# Reuse any files we can from the H8S
5# 5#
6 6
7obj-y := entry.o ints_h8s.o ptrace_h8s.o 7obj-y := ints_h8s.o ptrace_h8s.o
diff --git a/arch/h8300/platform/h8s/entry.S b/arch/h8300/platform/h8s/entry.S
deleted file mode 100644
index f3d6b8e8f959..000000000000
--- a/arch/h8300/platform/h8s/entry.S
+++ /dev/null
@@ -1,331 +0,0 @@
1/* -*- mode: asm -*-
2 *
3 * linux/arch/h8300/platform/h8s/entry.S
4 *
5 * Yoshinori Sato <ysato@users.sourceforge.jp>
6 *
7 * fairly heavy changes to fix syscall args and signal processing
8 * by David McCullough <davidm@snapgear.com>
9 */
10
11/*
12 * entry.S
13 * include exception/interrupt gateway
14 * system call entry
15 */
16
17#include <linux/sys.h>
18#include <asm/unistd.h>
19#include <asm/setup.h>
20#include <asm/segment.h>
21#include <asm/linkage.h>
22#include <asm/asm-offsets.h>
23#include <asm/thread_info.h>
24#include <asm/errno.h>
25
26 .h8300s
27
28/* CPU context save/restore macros. */
29
30 .macro SAVE_ALL
31 mov.l er0,@-sp
32
33 stc ccr,r0l /* check kernel mode */
34 btst #4,r0l
35 bne 5f
36
37 /* user mode */
38 mov.l sp,@SYMBOL_NAME(sw_usp)
39 mov.l @sp,er0 /* restore saved er0 */
40 orc #0x10,ccr /* switch kernel stack */
41 mov.l @SYMBOL_NAME(sw_ksp),sp
42 sub.l #(LRET-LORIG),sp /* allocate LORIG - LRET */
43 stm.l er0-er3,@-sp
44 mov.l @SYMBOL_NAME(sw_usp),er0
45 mov.l @(10:16,er0),er1 /* copy the RET addr */
46 mov.l er1,@(LRET-LER3:16,sp)
47 mov.w @(8:16,er0),r1
48 mov.w r1,@(LEXR-LER3:16,sp) /* copy EXR */
49
50 mov.w e1,r1 /* e1 highbyte = ccr */
51 and #0xef,r1h /* mask mode? flag */
52 sub.w r0,r0
53 mov.b r1h,r0l
54 mov.w r0,@(LCCR-LER3:16,sp) /* copy ccr */
55 mov.l @(LORIG-LER3:16,sp),er0
56 mov.l er0,@(LER0-LER3:16,sp) /* copy ER0 */
57 bra 6f
585:
59 /* kernel mode */
60 mov.l @sp,er0 /* restore saved er0 */
61 subs #2,sp /* set dummy ccr */
62 stm.l er0-er3,@-sp
63 mov.w @(LRET-LER3:16,sp),r1 /* copy old ccr */
64 mov.b r1h,r1l
65 mov.b #0,r1h
66 mov.w r1,@(LCCR-LER3:16,sp)
676:
68 mov.l er6,@-sp /* syscall arg #6 */
69 mov.l er5,@-sp /* syscall arg #5 */
70 mov.l er4,@-sp /* syscall arg #4 */
71 .endm
72
73 .macro RESTORE_ALL
74 mov.l @sp+,er4
75 mov.l @sp+,er5
76 mov.l @sp+,er6
77 ldm.l @sp+,er2-er3
78 mov.w @(LCCR-LER1:16,sp),r0 /* check kernel mode */
79 btst #4,r0l
80 bne 7f
81
82 orc #0x80,ccr
83 mov.l @SYMBOL_NAME(sw_usp),er0
84 mov.l @(LER0-LER1:16,sp),er1 /* restore ER0 */
85 mov.l er1,@er0
86 mov.w @(LEXR-LER1:16,sp),r1 /* restore EXR */
87 mov.b r1l,r1h
88 mov.w r1,@(8:16,er0)
89 mov.w @(LCCR-LER1:16,sp),r1 /* restore the RET addr */
90 mov.b r1l,r1h
91 mov.b @(LRET+1-LER1:16,sp),r1l
92 mov.w r1,e1
93 mov.w @(LRET+2-LER1:16,sp),r1
94 mov.l er1,@(10:16,er0)
95
96 mov.l @sp+,er1
97 add.l #(LRET-LER1),sp /* remove LORIG - LRET */
98 mov.l sp,@SYMBOL_NAME(sw_ksp)
99 andc #0xef,ccr /* switch to user mode */
100 mov.l er0,sp
101 bra 8f
1027:
103 mov.l @sp+,er1
104 adds #4,sp
105 adds #2,sp
1068:
107 mov.l @sp+,er0
108 adds #4,sp /* remove the sw created LVEC */
109 rte
110 .endm
111
112.globl SYMBOL_NAME(system_call)
113.globl SYMBOL_NAME(ret_from_exception)
114.globl SYMBOL_NAME(ret_from_fork)
115.globl SYMBOL_NAME(ret_from_interrupt)
116.globl SYMBOL_NAME(interrupt_redirect_table)
117.globl SYMBOL_NAME(sw_ksp),SYMBOL_NAME(sw_usp)
118.globl SYMBOL_NAME(resume)
119.globl SYMBOL_NAME(trace_break)
120.globl SYMBOL_NAME(interrupt_entry)
121
122INTERRUPTS = 128
123#if defined(CONFIG_ROMKERNEL)
124 .section .int_redirect,"ax"
125SYMBOL_NAME_LABEL(interrupt_redirect_table)
126 .rept 7
127 .long 0
128 .endr
129 jsr @SYMBOL_NAME(interrupt_entry) /* NMI */
130 jmp @SYMBOL_NAME(system_call) /* TRAPA #0 (System call) */
131 .long 0
132 .long 0
133 jmp @SYMBOL_NAME(trace_break) /* TRAPA #3 (breakpoint) */
134 .rept INTERRUPTS-12
135 jsr @SYMBOL_NAME(interrupt_entry)
136 .endr
137#endif
138#if defined(CONFIG_RAMKERNEL)
139.globl SYMBOL_NAME(interrupt_redirect_table)
140 .section .bss
141SYMBOL_NAME_LABEL(interrupt_redirect_table)
142 .space 4
143#endif
144
145 .section .text
146 .align 2
147SYMBOL_NAME_LABEL(interrupt_entry)
148 SAVE_ALL
149 mov.w @(LCCR,sp),r0
150 btst #4,r0l
151 bne 1f
152 mov.l @SYMBOL_NAME(sw_usp),er0
153 mov.l @(4:16,er0),er0
154 bra 2f
1551:
156 mov.l @(LVEC:16,sp),er0
1572:
158#if defined(CONFIG_ROMKERNEL)
159 sub.l #SYMBOL_NAME(interrupt_redirect_table),er0
160#endif
161#if defined(CONFIG_RAMKERNEL)
162 mov.l @SYMBOL_NAME(interrupt_redirect_table),er1
163 sub.l er1,er0
164#endif
165 shlr.l #2,er0
166 dec.l #1,er0
167 mov.l sp,er1
168 subs #4,er1 /* adjust ret_pc */
169 jsr @SYMBOL_NAME(process_int)
170 mov.l @SYMBOL_NAME(irq_stat)+CPUSTAT_SOFTIRQ_PENDING,er0
171 beq 1f
172 jsr @SYMBOL_NAME(do_softirq)
1731:
174 jmp @SYMBOL_NAME(ret_from_exception)
175
176SYMBOL_NAME_LABEL(system_call)
177 subs #4,sp /* dummy LVEC */
178 SAVE_ALL
179 mov.l er0,er4
180 mov.l #-ENOSYS,er0
181 mov.l er0,@(LER0:16,sp)
182
183 /* save top of frame */
184 mov.l sp,er0
185 jsr @SYMBOL_NAME(set_esp0)
186 cmp.l #NR_syscalls,er4
187 bcc SYMBOL_NAME(ret_from_exception):16
188 shll.l #2,er4
189 mov.l #SYMBOL_NAME(sys_call_table),er0
190 add.l er4,er0
191 mov.l @er0,er0
192 mov.l er0,er4
193 beq SYMBOL_NAME(ret_from_exception):16
194 mov.l sp,er2
195 and.w #0xe000,r2
196 mov.b @((TASK_FLAGS+3-(TIF_SYSCALL_TRACE >> 3)):16,er2),r2l
197 btst #(TIF_SYSCALL_TRACE & 7),r2l
198 mov.l @(LER1:16,sp),er0
199 mov.l @(LER2:16,sp),er1
200 mov.l @(LER3:16,sp),er2
201 andc #0x7f,ccr
202 jsr @er4
203 mov.l er0,@(LER0:16,sp) /* save the return value */
204#if defined(CONFIG_SYSCALL_PRINT)
205 jsr @SYMBOL_NAME(syscall_print)
206#endif
207 bra SYMBOL_NAME(ret_from_exception):8
2081:
209 jsr SYMBOL_NAME(syscall_trace)
210 mov.l @(LER1:16,sp),er0
211 mov.l @(LER2:16,sp),er1
212 mov.l @(LER3:16,sp),er2
213 jsr @er4
214 mov.l er0,@(LER0:16,sp) /* save the return value */
215 jsr @SYMBOL_NAME(syscall_trace)
216 bra SYMBOL_NAME(ret_from_exception):8
217
218SYMBOL_NAME_LABEL(ret_from_fork)
219 mov.l er2,er0
220 jsr @SYMBOL_NAME(schedule_tail)
221 bra SYMBOL_NAME(ret_from_exception):8
222
223SYMBOL_NAME_LABEL(reschedule)
224 /* save top of frame */
225 mov.l sp,er0
226 jsr @SYMBOL_NAME(set_esp0)
227 jsr @SYMBOL_NAME(schedule)
228
229SYMBOL_NAME_LABEL(ret_from_exception)
230#if defined(CONFIG_PREEMPT)
231 orc #0x80,ccr
232#endif
233SYMBOL_NAME_LABEL(ret_from_interrupt)
234 mov.b @(LCCR+1:16,sp),r0l
235 btst #4,r0l /* check if returning to kernel */
236 bne done:8 /* if so, skip resched, signals */
237 andc #0x7f,ccr
238 mov.l sp,er4
239 and.w #0xe000,r4
240 mov.l @(TI_FLAGS:16,er4),er1
241 and.l #_TIF_WORK_MASK,er1
242 beq done:8
2431:
244 mov.l @(TI_FLAGS:16,er4),er1
245 btst #TIF_NEED_RESCHED,r1l
246 bne SYMBOL_NAME(reschedule):16
247 mov.l sp,er0
248 subs #4,er0 /* adjust retpc */
249 mov.l er2,er1
250 jsr @SYMBOL_NAME(do_signal)
251#if defined(CONFIG_PREEMPT)
252 bra done:8 /* userspace thoru */
2533:
254 btst #4,r0l
255 beq done:8 /* userspace thoru */
2564:
257 mov.l @(TI_PRE_COUNT:16,er4),er1
258 bne done:8
259 mov.l @(TI_FLAGS:16,er4),er1
260 btst #TIF_NEED_RESCHED,r1l
261 beq done:8
262 mov.b r0l,r0l
263 bpl done:8 /* interrupt off (exception path?) */
264 mov.l #PREEMPT_ACTIVE,er1
265 mov.l er1,@(TI_PRE_COUNT:16,er4)
266 andc #0x7f,ccr
267 jsr @SYMBOL_NAME(schedule)
268 sub.l er1,er1
269 mov.l er1,@(TI_PRE_COUNT:16,er4)
270 orc #0x80,ccr
271 bra 4b:8
272#endif
273done:
274 RESTORE_ALL /* Does RTE */
275
276SYMBOL_NAME_LABEL(resume)
277 /*
278 * er0 = prev
279 * er1 = next
280 * return last in er2
281 */
282
283 /* save sr */
284 sub.w r3,r3
285 stc ccr,r3l
286 stc exr,r3h
287 mov.w r3,@(THREAD_CCR+2:16,er0)
288
289 /* disable interrupts */
290 orc #0x80,ccr
291 mov.l @SYMBOL_NAME(sw_usp),er3
292 mov.l er3,@(THREAD_USP:16,er0)
293 mov.l sp,@(THREAD_KSP:16,er0)
294
295 /* Skip address space switching if they are the same. */
296 /* FIXME: what did we hack out of here, this does nothing! */
297
298 mov.l @(THREAD_USP:16,er1),er0
299 mov.l er0,@SYMBOL_NAME(sw_usp)
300 mov.l @(THREAD_KSP:16,er1),sp
301
302 /* restore status register */
303 mov.w @(THREAD_CCR+2:16,er1),r3
304
305 ldc r3l,ccr
306 ldc r3h,exr
307
308 rts
309
310SYMBOL_NAME_LABEL(trace_break)
311 subs #4,sp /* dummy LVEC */
312 SAVE_ALL
313 sub.l er1,er1
314 dec.l #1,er1
315 mov.l er1,@(LORIG,sp)
316 mov.l sp,er0
317 jsr @SYMBOL_NAME(set_esp0)
318 mov.l @SYMBOL_NAME(sw_usp),er0
319 mov.l @er0,er1
320 subs #2,er1
321 mov.l er1,@er0
322 and.w #0xff,e1
323 mov.l er1,er0
324 jsr @SYMBOL_NAME(trace_trap)
325 jmp @SYMBOL_NAME(ret_from_exception)
326
327 .section .bss
328SYMBOL_NAME_LABEL(sw_ksp)
329 .space 4
330SYMBOL_NAME_LABEL(sw_usp)
331 .space 4
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