xref: /openbmc/qemu/target/alpha/mem_helper.c (revision 05caa062)
1 /*
2  *  Helpers for loads and stores
3  *
4  *  Copyright (c) 2007 Jocelyn Mayer
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18  */
19 
20 #include "qemu/osdep.h"
21 #include "cpu.h"
22 #include "exec/helper-proto.h"
23 #include "exec/exec-all.h"
24 #include "exec/cpu_ldst.h"
25 
26 static void do_unaligned_access(CPUAlphaState *env, vaddr addr, uintptr_t retaddr)
27 {
28     uint64_t pc;
29     uint32_t insn;
30 
31     cpu_restore_state(env_cpu(env), retaddr);
32 
33     pc = env->pc;
34     insn = cpu_ldl_code(env, pc);
35 
36     env->trap_arg0 = addr;
37     env->trap_arg1 = insn >> 26;                /* opcode */
38     env->trap_arg2 = (insn >> 21) & 31;         /* dest regno */
39 }
40 
41 #ifdef CONFIG_USER_ONLY
42 void alpha_cpu_record_sigbus(CPUState *cs, vaddr addr,
43                              MMUAccessType access_type, uintptr_t retaddr)
44 {
45     do_unaligned_access(cpu_env(cs), addr, retaddr);
46 }
47 #else
48 void alpha_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
49                                    MMUAccessType access_type,
50                                    int mmu_idx, uintptr_t retaddr)
51 {
52     CPUAlphaState *env = cpu_env(cs);
53 
54     do_unaligned_access(env, addr, retaddr);
55     cs->exception_index = EXCP_UNALIGN;
56     env->error_code = 0;
57     cpu_loop_exit(cs);
58 }
59 
60 void alpha_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr,
61                                      vaddr addr, unsigned size,
62                                      MMUAccessType access_type,
63                                      int mmu_idx, MemTxAttrs attrs,
64                                      MemTxResult response, uintptr_t retaddr)
65 {
66     CPUAlphaState *env = cpu_env(cs);
67 
68     env->trap_arg0 = addr;
69     env->trap_arg1 = access_type == MMU_DATA_STORE ? 1 : 0;
70     cs->exception_index = EXCP_MCHK;
71     env->error_code = 0;
72     cpu_loop_exit_restore(cs, retaddr);
73 }
74 #endif /* CONFIG_USER_ONLY */
75