1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ART_RUNTIME_ARCH_MIPS_CONTEXT_MIPS_H_
18#define ART_RUNTIME_ARCH_MIPS_CONTEXT_MIPS_H_
19
20#include "arch/context.h"
21#include "base/logging.h"
22#include "base/macros.h"
23#include "registers_mips.h"
24
25namespace art {
26namespace mips {
27
28class MipsContext : public Context {
29 public:
30  MipsContext() {
31    Reset();
32  }
33  virtual ~MipsContext() {}
34
35  void Reset() OVERRIDE;
36
37  void FillCalleeSaves(const StackVisitor& fr) OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
38
39  void SetSP(uintptr_t new_sp) OVERRIDE {
40    SetGPR(SP, new_sp);
41  }
42
43  void SetPC(uintptr_t new_pc) OVERRIDE {
44    SetGPR(RA, new_pc);
45  }
46
47  bool IsAccessibleGPR(uint32_t reg) OVERRIDE {
48    CHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters));
49    return gprs_[reg] != nullptr;
50  }
51
52  uintptr_t* GetGPRAddress(uint32_t reg) OVERRIDE {
53    DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters));
54    return gprs_[reg];
55  }
56
57  uintptr_t GetGPR(uint32_t reg) OVERRIDE {
58    CHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters));
59    DCHECK(IsAccessibleGPR(reg));
60    return *gprs_[reg];
61  }
62
63  void SetGPR(uint32_t reg, uintptr_t value) OVERRIDE;
64
65  bool IsAccessibleFPR(uint32_t reg) OVERRIDE {
66    CHECK_LT(reg, static_cast<uint32_t>(kNumberOfFRegisters));
67    return fprs_[reg] != nullptr;
68  }
69
70  uintptr_t GetFPR(uint32_t reg) OVERRIDE {
71    CHECK_LT(reg, static_cast<uint32_t>(kNumberOfFRegisters));
72    DCHECK(IsAccessibleFPR(reg));
73    return *fprs_[reg];
74  }
75
76  void SetFPR(uint32_t reg, uintptr_t value) OVERRIDE;
77
78  void SmashCallerSaves() OVERRIDE;
79  NO_RETURN void DoLongJump() OVERRIDE;
80
81 private:
82  // Pointers to registers in the stack, initialized to null except for the special cases below.
83  uintptr_t* gprs_[kNumberOfCoreRegisters];
84  uint32_t* fprs_[kNumberOfFRegisters];
85  // Hold values for sp and ra (return address) if they are not located within a stack frame.
86  uintptr_t sp_, ra_;
87};
88}  // namespace mips
89}  // namespace art
90
91#endif  // ART_RUNTIME_ARCH_MIPS_CONTEXT_MIPS_H_
92