N-archive/suyu
1
0
Fork 0
mirror of https://git.suyu.dev/suyu/suyu.git synced 2024-11-23 15:22:45 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

dyncom: Remove unnecessary abort-related cruft

Browse source 
Both the MPCore and the ARM9 have the same data abort model (base restored), so differentiating isn't necessary.
This commit is contained in:
Lioncash 2015-07-25 21:31:47 -04:00
parent dfb424b6d1
commit 3257d797e1
2 changed files with 1 additions and 48 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
src/core/arm/dyncom/arm_dyncom.cpp
View file

@ -23,10 +23,7 @@ ARM_DynCom::ARM_DynCom(PrivilegeMode initial_mode) {
ARMul_NewState(state.get()); ARMul_NewState(state.get());
ARMul_SelectProcessor(state.get(), ARM_v6_Prop | ARM_v5_Prop | ARM_v5e_Prop); ARMul_SelectProcessor(state.get(), ARM_v6_Prop | ARM_v5_Prop | ARM_v5e_Prop);
state->abort_model = ABORT_BASE_RESTORED;
state->bigendSig = LOW; state->bigendSig = LOW;
state->lateabtSig = LOW;
state->NirqSig = HIGH; state->NirqSig = HIGH;
// Reset the core to initial state // Reset the core to initial state

46
src/core/arm/skyeye_common/armstate.h
View file

@ -37,13 +37,6 @@ enum {
INSTCACHE = 2, INSTCACHE = 2,
}; };
// Abort models
enum {
ABORT_BASE_RESTORED = 0,
ABORT_EARLY = 1,
ABORT_BASE_UPDATED = 2
};
#define VFP_REG_NUM 64 #define VFP_REG_NUM 64
struct ARMul_State struct ARMul_State
{ {
@ -96,50 +89,13 @@ struct ARMul_State
unsigned bigendSig; unsigned bigendSig;
unsigned syscallSig; unsigned syscallSig;
/* 2004-05-09 chy // For differentiating ARM core emulation.
----------------------------------------------------------
read ARM Architecture Reference Manual
2.6.5 Data Abort
There are three Abort Model in ARM arch.
Early Abort Model: used in some ARMv3 and earlier implementations. In this
model, base register wirteback occurred for LDC,LDM,STC,STM instructions, and
the base register was unchanged for all other instructions. (oldest)
Base Restored Abort Model: If a Data Abort occurs in an instruction which
specifies base register writeback, the value in the base register is
unchanged. (strongarm, xscale)
Base Updated Abort Model: If a Data Abort occurs in an instruction which
specifies base register writeback, the base register writeback still occurs.
(arm720T)
read PART B
chap2 The System Control Coprocessor CP15
2.4 Register1:control register
L(bit 6): in some ARMv3 and earlier implementations, the abort model of the
processor could be configured:
0=early Abort Model Selected(now obsolete)
1=Late Abort Model selceted(same as Base Updated Abort Model)
on later processors, this bit reads as 1 and ignores writes.
-------------------------------------------------------------
So, if lateabtSig=1, then it means Late Abort Model(Base Updated Abort Model)
if lateabtSig=0, then it means Base Restored Abort Model
*/
unsigned lateabtSig;
// For differentiating ARM core emulaiton.
bool is_v4; // Are we emulating a v4 architecture (or higher)? bool is_v4; // Are we emulating a v4 architecture (or higher)?
bool is_v5; // Are we emulating a v5 architecture? bool is_v5; // Are we emulating a v5 architecture?
bool is_v5e; // Are we emulating a v5e architecture? bool is_v5e; // Are we emulating a v5e architecture?
bool is_v6; // Are we emulating a v6 architecture? bool is_v6; // Are we emulating a v6 architecture?
bool is_v7; // Are we emulating a v7 architecture? bool is_v7; // Are we emulating a v7 architecture?
// ARM_ARM A2-18
// 0 Base Restored Abort Model, 1 the Early Abort Model, 2 Base Updated Abort Model
int abort_model;
// TODO(bunnei): Move this cache to a better place - it should be per codeset (likely per // TODO(bunnei): Move this cache to a better place - it should be per codeset (likely per
// process for our purposes), not per ARMul_State (which tracks CPU core state). // process for our purposes), not per ARMul_State (which tracks CPU core state).
std::unordered_map<u32, int> instruction_cache; std::unordered_map<u32, int> instruction_cache;