1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/*
* CRIS helper routines.
*
* Copyright (c) 2007 AXIS Communications AB
* Written by Edgar E. Iglesias.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <string.h>
#include "config.h"
#include "cpu.h"
#include "mmu.h"
#include "exec-all.h"
#include "host-utils.h"
#if defined(CONFIG_USER_ONLY)
void do_interrupt (CPUState *env)
{
env->exception_index = -1;
}
int cpu_cris_handle_mmu_fault(CPUState * env, target_ulong address, int rw,
int mmu_idx, int is_softmmu)
{
env->exception_index = 0xaa;
env->debug1 = address;
cpu_dump_state(env, stderr, fprintf, 0);
printf("%s addr=%x env->pc=%x\n", __func__, address, env->pc);
return 1;
}
target_phys_addr_t cpu_get_phys_page_debug(CPUState * env, target_ulong addr)
{
return addr;
}
#else /* !CONFIG_USER_ONLY */
int cpu_cris_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
int mmu_idx, int is_softmmu)
{
struct cris_mmu_result_t res;
int prot, miss;
target_ulong phy;
address &= TARGET_PAGE_MASK;
prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
// printf ("%s pc=%x %x w=%d smmu=%d\n", __func__, env->pc, address, rw, is_softmmu);
miss = cris_mmu_translate(&res, env, address, rw, mmu_idx);
if (miss)
{
/* handle the miss. */
phy = 0;
env->exception_index = EXCP_MMU_MISS;
}
else
{
phy = res.phy;
}
// printf ("a=%x phy=%x\n", address, phy);
return tlb_set_page(env, address, phy, prot, mmu_idx, is_softmmu);
}
static void cris_shift_ccs(CPUState *env)
{
uint32_t ccs;
/* Apply the ccs shift. */
ccs = env->pregs[PR_CCS];
ccs = (ccs & 0xc0000000) | ((ccs << 12) >> 2);
env->pregs[PR_CCS] = ccs;
}
void do_interrupt(CPUState *env)
{
uint32_t ebp, isr;
int irqnum;
fflush(NULL);
#if 0
printf ("exception index=%d interrupt_req=%d\n",
env->exception_index,
env->interrupt_request);
#endif
switch (env->exception_index)
{
case EXCP_BREAK:
irqnum = env->trapnr;
ebp = env->pregs[PR_EBP];
isr = ldl_code(ebp + irqnum * 4);
env->pregs[PR_ERP] = env->pc + 2;
env->pc = isr;
cris_shift_ccs(env);
break;
case EXCP_MMU_MISS:
// printf ("MMU miss\n");
irqnum = 4;
ebp = env->pregs[PR_EBP];
isr = ldl_code(ebp + irqnum * 4);
env->pregs[PR_ERP] = env->pc;
env->pc = isr;
cris_shift_ccs(env);
break;
default:
{
/* Maybe the irq was acked by sw before we got a
change to take it. */
if (env->interrupt_request & CPU_INTERRUPT_HARD) {
if (!env->pending_interrupts)
return;
if (!(env->pregs[PR_CCS] & I_FLAG)) {
return;
}
irqnum = 31 - clz32(env->pending_interrupts);
irqnum += 0x30;
ebp = env->pregs[PR_EBP];
isr = ldl_code(ebp + irqnum * 4);
env->pregs[PR_ERP] = env->pc;
env->pc = isr;
cris_shift_ccs(env);
#if 0
printf ("%s ebp=%x %x isr=%x %d"
" ir=%x pending=%x\n",
__func__,
ebp, ebp + irqnum * 4,
isr, env->exception_index,
env->interrupt_request,
env->pending_interrupts);
#endif
}
}
break;
}
}
target_phys_addr_t cpu_get_phys_page_debug(CPUState * env, target_ulong addr)
{
uint32_t phy = addr;
struct cris_mmu_result_t res;
int miss;
miss = cris_mmu_translate(&res, env, addr, 0, 0);
if (!miss)
phy = res.phy;
return phy;
}
#endif
|
