ps2sdk  1.1
A collection of Open Source libraries used for developing applications on Sony's PlayStation 2® (PS2).
Data Structures | Functions | Variables
tlbsrc.c File Reference
#include <kernel.h>
#include <ee_cop0_defs.h>
+ Include dependency graph for tlbsrc.c:

Go to the source code of this file.

Data Structures

struct  SyscallPatchData
 

Functions

int PutTLBEntry (unsigned int PageMask, unsigned int EntryHi, unsigned int EntryLo0, unsigned int EntryLo1)
 
int SetTLBEntry (unsigned int index, unsigned int PageMask, unsigned int EntryHi, unsigned int EntryLo0, unsigned int EntryLo1)
 
int GetTLBEntry (unsigned int index, unsigned int *PageMask, unsigned int *EntryHi, unsigned int *EntryLo0, unsigned int *EntryLo1)
 
int ProbeTLBEntry (unsigned int EntryHi, unsigned int *PageMask, unsigned int *EntryLo0, unsigned int *EntryLo1)
 
int ExpandScratchPad (unsigned int page)
 
int _start (int syscall)
 

Variables

char * _kExecArg [] = {NULL}
 
static const struct SyscallPatchData SyscallPatchData []
 

Function Documentation

◆ _start()

int _start ( int  syscall)

Definition at line 48 of file tlbsrc.c.

48  {
49  unsigned int i;
50 
51  for(i=0; i<6; i++){
52  if(SyscallPatchData[i].syscall==syscall){
53  return((unsigned int)SyscallPatchData[i].function);
54  }
55  }
56 
57  return 0;
58 }

References SyscallPatchData::syscall.

◆ ExpandScratchPad()

int ExpandScratchPad ( unsigned int  page)

Definition at line 163 of file tlbsrc.c.

163  {
164  int result, index;
165  unsigned int PageMask, EntryHi, EntryLo0, EntryLo1;
166 
167  if(!(page&0xFFF)){
168  if(0xFFFFE<page-1){
169  if((index=ProbeTLBEntry(0x70004000, &PageMask, &EntryLo0, &EntryLo1))>=0){
170  if(page==0){
171  EntryHi=0xE0010000+((index-1)<<13);
172 
173  __asm volatile( "mfc0 $v0, $6\n"
174  "addiu $v0, $v0, 0xFFFF\n"
175  "mtc0 $v0, $6\n"
176  "mtc0 %0, $0\n"
177  "mtc0 $zero, $5\n"
178  "mtc0 %1, $10\n"
179  "mtc0 $zero, $2\n"
180  "mtc0 $zero, $3\n"
181  "sync.p\n"
182  "tlbwi\n"
183  "sync.p\n" ::"r"(index),"r"(EntryHi));
184  }
185  else{
186  __asm volatile( "mfc0 %0, $6\n"
187  "addiu $v0, %0, 1\n"
188  "mtc0 $v0, $6\n" ::"r"(index));
189  }
190  }
191 
192  if(page!=0){
193  /* Not sure why this code saves the EntryLo0 and EntryLo1 values on the stack, and sets a word on the stack to zero, but does not use them:
194 
195  0($sp)=0
196  4($sp)=$v0=(page+0x1000&0xFFFFF000)>>6|0x1F
197  8($sp)=$a0=(page&0xFFFFF000)>>6|0x1F */
198 
199  EntryHi=0x70004000;
200  EntryLo0=((page+0x1000)&0xFFFFF000)>>6|0x1F;
201  EntryLo1=(page&0xFFFFF000)>>6|0x1F;
202 
203  __asm volatile( "mtc0 %0, $0\n"
204  "daddu $v1, $zero, $zero\n"
205  "mtc0 $v1, $5\n"
206  "mtc0 %1, $10\n"
207  "mtc0 %2, $2\n"
208  "mtc0 %3, $3\n"
209  "sync.p\n"
210  "tlbwi\n"
211  "sync.p\n" ::"r"(index),"r"(EntryHi),"r"(EntryLo0),"r"(EntryLo1));
212 
213  result=index;
214  }
215  else result=0;
216  }
217  else result=-1;
218  }
219  else result=-1;
220 
221  return result;
222 }
index
s32 index
Definition: libpad.c:194
result
s32 result
Definition: rpc_client.c:23
ProbeTLBEntry
int ProbeTLBEntry(unsigned int EntryHi, unsigned int *PageMask, unsigned int *EntryLo0, unsigned int *EntryLo1)
Definition: tlbsrc.c:136

References index, ProbeTLBEntry(), and result.

◆ GetTLBEntry()

int GetTLBEntry ( unsigned int  index,
unsigned int *  PageMask,
unsigned int *  EntryHi,
unsigned int *  EntryLo0,
unsigned int *  EntryLo1 
)

Definition at line 111 of file tlbsrc.c.

111  {
112  int result;
113 
114  if(index<0x30){
115  __asm volatile( "mtc0 %0, $0\n"
116  "sync.p\n"
117  "tlbr\n"
118  "sync.p\n"
119  "mfc0 $v0, $5\n"
120  "sw $v0, (%1)\n"
121  "mfc0 $v0, $10\n"
122  "sw $v0, (%2)\n"
123  "mfc0 $v0, $2\n"
124  "sw $v0, (%3)\n"
125  "mfc0 $v0, $3\n"
126  "sw $v0, (%4)\n" ::"r"(index),"r"(PageMask),"r"(EntryHi),"r"(EntryLo0),"r"(EntryLo1));
127 
128  result=index;
129  }
130  else result=-1;
131 
132  return result;
133 }

References index, and result.

◆ ProbeTLBEntry()

int ProbeTLBEntry ( unsigned int  EntryHi,
unsigned int *  PageMask,
unsigned int *  EntryLo0,
unsigned int *  EntryLo1 
)

Definition at line 136 of file tlbsrc.c.

136  {
137  int result, index;
138 
139  __asm volatile( "mtc0 %1, $10\n"
140  "sync.p\n"
141  "tlbp\n"
142  "sync.p\n"
143  "mfc0 %0, $0\n" :"=r"(index):"r"(EntryHi));
144 
145  if(index>=0){
146  __asm volatile( "tlbr\n"
147  "sync.p\n"
148  "mfc0 $v0, $5\n"
149  "sw $v0, (%0)\n"
150  "mfc0 $v1, $2\n"
151  "sw $v1, (%1)\n"
152  "mfc0 $v0, $3\n"
153  "sw $v0, (%2)\n" ::"r"(PageMask),"r"(EntryLo0),"r"(EntryLo1));
154 
155  result=index;
156  }
157  else result=-1;
158 
159  return result;
160 }

References index, and result.

Referenced by ExpandScratchPad().

◆ PutTLBEntry()

int PutTLBEntry ( unsigned int  PageMask,
unsigned int  EntryHi,
unsigned int  EntryLo0,
unsigned int  EntryLo1 
)

Definition at line 61 of file tlbsrc.c.

61  {
62  int result;
63 
64  switch(EntryHi>>24){
65  case 0x40:
66  case 0x30:
67  case 0x20:
68  case 0x00:
69  __asm volatile( "mtc0 %1, $5\n"
70  "mtc0 %2, $10\n"
71  "mtc0 %3, $2\n"
72  "mtc0 %4, $3\n"
73  "sync.p\n"
74  "tlbwr\n"
75  "sync.p\n"
76  "tlbp\n"
77  "sync.p\n"
78  "mfc0 %0, $0\n" :"=r"(result):"r"(PageMask),"r"(EntryHi),"r"(EntryLo0),"r"(EntryLo1));
79  break;
80  case 0x50:
81  case 0x10:
82  default: //SP193: I don't remember seeing a default case. Anyway... Keeping Compilers Happy (TM).
83  result=-1;
84  }
85 
86  return result;
87 }

References result.

◆ SetTLBEntry()

int SetTLBEntry ( unsigned int  index,
unsigned int  PageMask,
unsigned int  EntryHi,
unsigned int  EntryLo0,
unsigned int  EntryLo1 
)

Definition at line 90 of file tlbsrc.c.

90  {
91  int result;
92 
93  if(index<0x30){
94  __asm volatile( "mtc0 %0, $0\n"
95  "mtc0 %1, $5\n"
96  "mtc0 %2, $10\n"
97  "mtc0 %3, $2\n"
98  "mtc0 %4, $3\n"
99  "sync.p\n"
100  "tlbwi\n"
101  "sync.p\n" ::"r"(index),"r"(PageMask),"r"(EntryHi),"r"(EntryLo0),"r"(EntryLo1));
102 
103  result=index;
104  }
105  else result=-1;
106 
107  return result;
108 }

References index, and result.

Variable Documentation

◆ _kExecArg

char* _kExecArg[] = {NULL}

Definition at line 26 of file tlbsrc.c.

Referenced by InitTLBFunctions().

◆ SyscallPatchData

const struct SyscallPatchData SyscallPatchData[]
static
Initial value:
={
{ 0x55, &PutTLBEntry},
{ 0x56, &SetTLBEntry},
{ 0x57, &GetTLBEntry},
{ 0x58, &ProbeTLBEntry},
{ 0x59, &ExpandScratchPad},
{ 0x03, &_kExecArg},
}
GetTLBEntry
int GetTLBEntry(unsigned int index, unsigned int *PageMask, unsigned int *EntryHi, unsigned int *EntryLo0, unsigned int *EntryLo1)
Definition: tlbsrc.c:111
_kExecArg
char * _kExecArg[]
Definition: tlbsrc.c:26
PutTLBEntry
int PutTLBEntry(unsigned int PageMask, unsigned int EntryHi, unsigned int EntryLo0, unsigned int EntryLo1)
Definition: tlbsrc.c:61
SetTLBEntry
int SetTLBEntry(unsigned int index, unsigned int PageMask, unsigned int EntryHi, unsigned int EntryLo0, unsigned int EntryLo1)
Definition: tlbsrc.c:90
ExpandScratchPad
int ExpandScratchPad(unsigned int page)
Definition: tlbsrc.c:163

Definition at line 34 of file tlbsrc.c.