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dyncom: Migrate exclusive memory access control into armstate

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This commit is contained in:
Lioncash 2015-07-27 21:40:48 -04:00
parent db4e99c186
commit a507ea23c1
2 changed files with 35 additions and 50 deletions
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25
src/core/arm/skyeye_common/armstate.h
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@ -163,6 +163,19 @@ public:
u32 ReadCP15Register(u32 crn, u32 opcode_1, u32 crm, u32 opcode_2) const;
void WriteCP15Register(u32 value, u32 crn, u32 opcode_1, u32 crm, u32 opcode_2);
// Exclusive memory access functions
bool IsExclusiveMemoryAccess(u32 address) const {
return exclusive_state && exclusive_tag == (address & RESERVATION_GRANULE_MASK);
}
void SetExclusiveMemoryAddress(u32 address) {
exclusive_tag = address & RESERVATION_GRANULE_MASK;
exclusive_state = true;
}
void UnsetExclusiveMemoryAddress() {
exclusive_tag = 0xFFFFFFFF;
exclusive_state = false;
}
// Whether or not the given CPU is in big endian mode (E bit is set)
bool InBigEndianMode() const {
return (Cpsr & (1 << 9)) != 0;
@ -203,9 +216,6 @@ public:
u32 Mode; // The current mode
u32 Bank; // The current register bank
u32 exclusive_tag; // The address for which the local monitor is in exclusive access mode
u32 exclusive_state;
u32 exclusive_result;
u32 NFlag, ZFlag, CFlag, VFlag, IFFlags; // Dummy flags for speed
unsigned int shifter_carry_out;
@ -230,4 +240,13 @@ public:
private:
void ResetMPCoreCP15Registers();
// Defines a reservation granule of 2 words, which protects the first 2 words starting at the tag.
// This is the smallest granule allowed by the v7 spec, and is coincidentally just large enough to
// support LDR/STREXD.
static const u32 RESERVATION_GRANULE_MASK = 0xFFFFFFF8;
u32 exclusive_tag; // The address for which the local monitor is in exclusive access mode
u32 exclusive_result;
bool exclusive_state;
};