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git.proxmox.com Git - qemu.git/blob - target-cris/helper.c
2 * CRIS helper routines.
4 * Copyright (c) 2007 AXIS Communications AB
5 * Written by Edgar E. Iglesias.
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.
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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 #include "host-utils.h"
33 #if defined(CONFIG_USER_ONLY)
35 void do_interrupt (CPUState
*env
)
37 env
->exception_index
= -1;
38 env
->pregs
[PR_ERP
] = env
->pc
;
41 int cpu_cris_handle_mmu_fault(CPUState
* env
, target_ulong address
, int rw
,
42 int mmu_idx
, int is_softmmu
)
44 env
->exception_index
= 0xaa;
45 env
->pregs
[PR_EDA
] = address
;
46 cpu_dump_state(env
, stderr
, fprintf
, 0);
50 target_phys_addr_t
cpu_get_phys_page_debug(CPUState
* env
, target_ulong addr
)
55 #else /* !CONFIG_USER_ONLY */
58 static void cris_shift_ccs(CPUState
*env
)
61 /* Apply the ccs shift. */
62 ccs
= env
->pregs
[PR_CCS
];
63 ccs
= ((ccs
& 0xc0000000) | ((ccs
<< 12) >> 2)) & ~0x3ff;
64 env
->pregs
[PR_CCS
] = ccs
;
67 int cpu_cris_handle_mmu_fault (CPUState
*env
, target_ulong address
, int rw
,
68 int mmu_idx
, int is_softmmu
)
70 struct cris_mmu_result_t res
;
75 D(printf ("%s addr=%x pc=%x rw=%x\n", __func__
, address
, env
->pc
, rw
));
76 address
&= TARGET_PAGE_MASK
;
77 miss
= cris_mmu_translate(&res
, env
, address
, rw
, mmu_idx
);
80 if (env
->exception_index
== EXCP_BUSFAULT
)
82 "CRIS: Illegal recursive bus fault."
86 env
->exception_index
= EXCP_BUSFAULT
;
87 env
->fault_vector
= res
.bf_vec
;
94 r
= tlb_set_page(env
, address
, phy
, prot
, mmu_idx
, is_softmmu
);
97 D(fprintf(logfile
, "%s returns %d irqreq=%x addr=%x"
98 " phy=%x ismmu=%d vec=%x pc=%x\n",
99 __func__
, r
, env
->interrupt_request
,
100 address
, res
.phy
, is_softmmu
, res
.bf_vec
, env
->pc
));
104 void do_interrupt(CPUState
*env
)
108 D(fprintf (logfile
, "exception index=%d interrupt_req=%d\n",
109 env
->exception_index
,
110 env
->interrupt_request
));
112 switch (env
->exception_index
)
115 /* These exceptions are genereated by the core itself.
116 ERP should point to the insn following the brk. */
117 ex_vec
= env
->trap_vector
;
118 env
->pregs
[PR_ERP
] = env
->pc
+ 2;
122 /* NMI is hardwired to vector zero. */
124 env
->pregs
[PR_CCS
] &= ~M_FLAG
;
125 env
->pregs
[PR_NRP
] = env
->pc
;
129 ex_vec
= env
->fault_vector
;
130 env
->pregs
[PR_ERP
] = env
->pc
;
134 /* The interrupt controller gives us the vector. */
135 ex_vec
= env
->interrupt_vector
;
136 /* Normal interrupts are taken between
137 TB's. env->pc is valid here. */
138 env
->pregs
[PR_ERP
] = env
->pc
;
143 D(fprintf(logfile
, "excp isr=%x PC=%x ds=%d SP=%x"
144 " ERP=%x pid=%x ccs=%x cc=%d %x\n",
145 ex_vec
, env
->pc
, env
->dslot
,
147 env
->pregs
[PR_ERP
], env
->pregs
[PR_PID
],
149 env
->cc_op
, env
->cc_mask
));
150 /* We loose the btarget, btaken state here so rexec the
152 env
->pregs
[PR_ERP
] -= env
->dslot
;
153 /* Exception starts with dslot cleared. */
157 env
->pc
= ldl_code(env
->pregs
[PR_EBP
] + ex_vec
* 4);
159 if (env
->pregs
[PR_CCS
] & U_FLAG
) {
160 /* Swap stack pointers. */
161 env
->pregs
[PR_USP
] = env
->regs
[R_SP
];
162 env
->regs
[R_SP
] = env
->ksp
;
165 /* Apply the CRIS CCS shift. Clears U if set. */
167 D(fprintf (logfile
, "%s isr=%x vec=%x ccs=%x pid=%d erp=%x\n",
168 __func__
, env
->pc
, ex_vec
,
171 env
->pregs
[PR_ERP
]));
174 target_phys_addr_t
cpu_get_phys_page_debug(CPUState
* env
, target_ulong addr
)
177 struct cris_mmu_result_t res
;
179 miss
= cris_mmu_translate(&res
, env
, addr
, 0, 0);
182 D(fprintf(stderr
, "%s %x -> %x\n", __func__
, addr
, phy
));