root / target-cris / helper.c @ ac72472b
History | View | Annotate | Download (4.9 kB)
1 |
/*
|
---|---|
2 |
* CRIS helper routines.
|
3 |
*
|
4 |
* Copyright (c) 2007 AXIS Communications AB
|
5 |
* Written by Edgar E. Iglesias.
|
6 |
*
|
7 |
* This library is free software; you can redistribute it and/or
|
8 |
* modify it under the terms of the GNU Lesser General Public
|
9 |
* License as published by the Free Software Foundation; either
|
10 |
* version 2 of the License, or (at your option) any later version.
|
11 |
*
|
12 |
* This library is distributed in the hope that it will be useful,
|
13 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
14 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
15 |
* Lesser General Public License for more details.
|
16 |
*
|
17 |
* You should have received a copy of the GNU Lesser General Public
|
18 |
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
19 |
*/
|
20 |
|
21 |
#include <stdio.h> |
22 |
#include <string.h> |
23 |
|
24 |
#include "config.h" |
25 |
#include "cpu.h" |
26 |
#include "mmu.h" |
27 |
#include "exec-all.h" |
28 |
#include "host-utils.h" |
29 |
|
30 |
|
31 |
//#define CRIS_HELPER_DEBUG
|
32 |
|
33 |
|
34 |
#ifdef CRIS_HELPER_DEBUG
|
35 |
#define D(x) x
|
36 |
#define D_LOG(...) qemu_log(__VA__ARGS__)
|
37 |
#else
|
38 |
#define D(x)
|
39 |
#define D_LOG(...) do { } while (0) |
40 |
#endif
|
41 |
|
42 |
#if defined(CONFIG_USER_ONLY)
|
43 |
|
44 |
void do_interrupt (CPUState *env)
|
45 |
{ |
46 |
env->exception_index = -1;
|
47 |
env->pregs[PR_ERP] = env->pc; |
48 |
} |
49 |
|
50 |
int cpu_cris_handle_mmu_fault(CPUState * env, target_ulong address, int rw, |
51 |
int mmu_idx, int is_softmmu) |
52 |
{ |
53 |
env->exception_index = 0xaa;
|
54 |
env->pregs[PR_EDA] = address; |
55 |
cpu_dump_state(env, stderr, fprintf, 0);
|
56 |
return 1; |
57 |
} |
58 |
|
59 |
target_phys_addr_t cpu_get_phys_page_debug(CPUState * env, target_ulong addr) |
60 |
{ |
61 |
return addr;
|
62 |
} |
63 |
|
64 |
#else /* !CONFIG_USER_ONLY */ |
65 |
|
66 |
|
67 |
static void cris_shift_ccs(CPUState *env) |
68 |
{ |
69 |
uint32_t ccs; |
70 |
/* Apply the ccs shift. */
|
71 |
ccs = env->pregs[PR_CCS]; |
72 |
ccs = ((ccs & 0xc0000000) | ((ccs << 12) >> 2)) & ~0x3ff; |
73 |
env->pregs[PR_CCS] = ccs; |
74 |
} |
75 |
|
76 |
int cpu_cris_handle_mmu_fault (CPUState *env, target_ulong address, int rw, |
77 |
int mmu_idx, int is_softmmu) |
78 |
{ |
79 |
struct cris_mmu_result res;
|
80 |
int prot, miss;
|
81 |
int r = -1; |
82 |
target_ulong phy; |
83 |
|
84 |
D(printf ("%s addr=%x pc=%x rw=%x\n", __func__, address, env->pc, rw));
|
85 |
address &= TARGET_PAGE_MASK; |
86 |
miss = cris_mmu_translate(&res, env, address, rw, mmu_idx); |
87 |
if (miss)
|
88 |
{ |
89 |
if (env->exception_index == EXCP_BUSFAULT)
|
90 |
cpu_abort(env, |
91 |
"CRIS: Illegal recursive bus fault."
|
92 |
"addr=%x rw=%d\n",
|
93 |
address, rw); |
94 |
|
95 |
env->exception_index = EXCP_BUSFAULT; |
96 |
env->fault_vector = res.bf_vec; |
97 |
r = 1;
|
98 |
} |
99 |
else
|
100 |
{ |
101 |
/*
|
102 |
* Mask off the cache selection bit. The ETRAX busses do not
|
103 |
* see the top bit.
|
104 |
*/
|
105 |
phy = res.phy & ~0x80000000;
|
106 |
prot = res.prot; |
107 |
r = tlb_set_page(env, address, phy, prot, mmu_idx, is_softmmu); |
108 |
} |
109 |
if (r > 0) |
110 |
D_LOG("%s returns %d irqreq=%x addr=%x"
|
111 |
" phy=%x ismmu=%d vec=%x pc=%x\n",
|
112 |
__func__, r, env->interrupt_request, |
113 |
address, res.phy, is_softmmu, res.bf_vec, env->pc); |
114 |
return r;
|
115 |
} |
116 |
|
117 |
void do_interrupt(CPUState *env)
|
118 |
{ |
119 |
int ex_vec = -1; |
120 |
|
121 |
D_LOG( "exception index=%d interrupt_req=%d\n",
|
122 |
env->exception_index, |
123 |
env->interrupt_request); |
124 |
|
125 |
switch (env->exception_index)
|
126 |
{ |
127 |
case EXCP_BREAK:
|
128 |
/* These exceptions are genereated by the core itself.
|
129 |
ERP should point to the insn following the brk. */
|
130 |
ex_vec = env->trap_vector; |
131 |
env->pregs[PR_ERP] = env->pc; |
132 |
break;
|
133 |
|
134 |
case EXCP_NMI:
|
135 |
/* NMI is hardwired to vector zero. */
|
136 |
ex_vec = 0;
|
137 |
env->pregs[PR_CCS] &= ~M_FLAG; |
138 |
env->pregs[PR_NRP] = env->pc; |
139 |
break;
|
140 |
|
141 |
case EXCP_BUSFAULT:
|
142 |
ex_vec = env->fault_vector; |
143 |
env->pregs[PR_ERP] = env->pc; |
144 |
break;
|
145 |
|
146 |
default:
|
147 |
/* The interrupt controller gives us the vector. */
|
148 |
ex_vec = env->interrupt_vector; |
149 |
/* Normal interrupts are taken between
|
150 |
TB's. env->pc is valid here. */
|
151 |
env->pregs[PR_ERP] = env->pc; |
152 |
break;
|
153 |
} |
154 |
|
155 |
/* Fill in the IDX field. */
|
156 |
env->pregs[PR_EXS] = (ex_vec & 0xff) << 8; |
157 |
|
158 |
if (env->dslot) {
|
159 |
D_LOG("excp isr=%x PC=%x ds=%d SP=%x"
|
160 |
" ERP=%x pid=%x ccs=%x cc=%d %x\n",
|
161 |
ex_vec, env->pc, env->dslot, |
162 |
env->regs[R_SP], |
163 |
env->pregs[PR_ERP], env->pregs[PR_PID], |
164 |
env->pregs[PR_CCS], |
165 |
env->cc_op, env->cc_mask); |
166 |
/* We loose the btarget, btaken state here so rexec the
|
167 |
branch. */
|
168 |
env->pregs[PR_ERP] -= env->dslot; |
169 |
/* Exception starts with dslot cleared. */
|
170 |
env->dslot = 0;
|
171 |
} |
172 |
|
173 |
env->pc = ldl_code(env->pregs[PR_EBP] + ex_vec * 4);
|
174 |
|
175 |
if (env->pregs[PR_CCS] & U_FLAG) {
|
176 |
/* Swap stack pointers. */
|
177 |
env->pregs[PR_USP] = env->regs[R_SP]; |
178 |
env->regs[R_SP] = env->ksp; |
179 |
} |
180 |
|
181 |
/* Apply the CRIS CCS shift. Clears U if set. */
|
182 |
cris_shift_ccs(env); |
183 |
D_LOG("%s isr=%x vec=%x ccs=%x pid=%d erp=%x\n",
|
184 |
__func__, env->pc, ex_vec, |
185 |
env->pregs[PR_CCS], |
186 |
env->pregs[PR_PID], |
187 |
env->pregs[PR_ERP]); |
188 |
} |
189 |
|
190 |
target_phys_addr_t cpu_get_phys_page_debug(CPUState * env, target_ulong addr) |
191 |
{ |
192 |
uint32_t phy = addr; |
193 |
struct cris_mmu_result res;
|
194 |
int miss;
|
195 |
miss = cris_mmu_translate(&res, env, addr, 0, 0); |
196 |
if (!miss)
|
197 |
phy = res.phy; |
198 |
D(fprintf(stderr, "%s %x -> %x\n", __func__, addr, phy));
|
199 |
return phy;
|
200 |
} |
201 |
#endif
|