tlbfunc.c File Reference

#include <kernel.h>
#include <stdio.h>

Include dependency graph for tlbfunc.c:

Go to the source code of this file.

Data Structures
struct	SyscallData
struct	TLBEntry
struct	TLBInfo

Macros
#define	kprintf(args...)
#define	TLB_NUM_KERNEL_ENTRIES   0x0D
#define	TLB_NUM_DEFAULT_ENTRIES   0x12
#define	TLB_NUM_EXTENDED_ENTRIES   0x08

Functions
static int	InitTLB32MB (void)
void *	GetEntryAddress (int syscall)
void	setup (int syscall, void *function)
void	InitTLBFunctions (void)
void	InitTLB (void)

Variables
static const struct SyscallData	SysEntry []
char **	_kExecArg
unsigned char	tlbsrc []
unsigned int	size_tlbsrc
static const struct TLBEntry	kernelTLB [TLB_NUM_KERNEL_ENTRIES]
static const struct TLBEntry	defaultTLB [TLB_NUM_DEFAULT_ENTRIES]
static const struct TLBEntry	extendTLB [TLB_NUM_EXTENDED_ENTRIES]
static struct TLBInfo	TLBInfo ={TLB_NUM_KERNEL_ENTRIES, TLB_NUM_DEFAULT_ENTRIES, TLB_NUM_EXTENDED_ENTRIES, 0, kernelTLB, defaultTLB, extendTLB}

Macro Definition Documentation

kprintf

#define kprintf

(

args...

)

Definition at line 13 of file tlbfunc.c.

TLB_NUM_DEFAULT_ENTRIES

#define TLB_NUM_DEFAULT_ENTRIES   0x12

Definition at line 84 of file tlbfunc.c.

TLB_NUM_EXTENDED_ENTRIES

#define TLB_NUM_EXTENDED_ENTRIES   0x08

Definition at line 85 of file tlbfunc.c.

TLB_NUM_KERNEL_ENTRIES

#define TLB_NUM_KERNEL_ENTRIES   0x0D

Definition at line 83 of file tlbfunc.c.

Function Documentation

GetEntryAddress()

void* GetEntryAddress

(

int

syscall

)

Referenced by InitTLBFunctions().

InitTLB()

void InitTLB

(

void

)

Definition at line 57 of file tlbfunc.c.

                  {
        if(GetMemorySize()==0x2000000){
                InitTLB32MB();
        }
        else{
                _InitTLB();
        }
}

InitTLB32MB()

static int InitTLB32MB ( void  )

static

Definition at line 142 of file tlbfunc.c.

                            {
        unsigned int i, NumTlbEntries, value, TlbEndIndex;
        const struct TLBEntry *TLBEntry;
 
        kprintf("# TLB spad=0 kernel=1:%d default=%d:%d extended=%d:%d\n", TLBInfo.NumKernelTLBEntries-1, TLBInfo.NumKernelTLBEntries, TLBInfo.NumKernelTLBEntries+TLBInfo.NumDefaultTLBEntries-1, TLBInfo.NumKernelTLBEntries+TLBInfo.NumDefaultTLBEntries, TLBInfo.NumKernelTLBEntries+TLBInfo.NumDefaultTLBEntries+TLBInfo.NumExtendedTLBEntries-1);
 
        __asm volatile( "mtc0 $zero, $6\n"
                        "sync.p\n");
 
        if(TLBInfo.NumKernelTLBEntries>=0x31){
                kprintf("# TLB over flow (1)");
                Exit(1);
        }
 
        for(i=0,TLBEntry=TLBInfo.kernelTLB; i<TLBInfo.NumKernelTLBEntries; i++,TLBEntry++){
                _SetTLBEntry(i, TLBEntry->PageMask, TLBEntry->EntryHi, TLBEntry->EntryLo0, TLBEntry->EntryLo1);
        }
 
        if(TLBInfo.NumDefaultTLBEntries+i>=0x31){
                kprintf("# TLB over flow (2)");
                Exit(1);
        }
 
        for(TLBEntry=TLBInfo.defaultTLB,TlbEndIndex=TLBInfo.NumDefaultTLBEntries+i; i<TlbEndIndex; i++,TLBEntry++){
                _SetTLBEntry(i, TLBEntry->PageMask, TLBEntry->EntryHi, TLBEntry->EntryLo0, TLBEntry->EntryLo1);
        }
 
        TLBInfo.NumWiredEntries=NumTlbEntries=i;
        __asm volatile( "mtc0 %0, $6\n"
                        "sync.p\n" ::"r"(NumTlbEntries));
 
        if(TLBInfo.NumExtendedTLBEntries>0){
                if(TLBInfo.NumExtendedTLBEntries+i>=0x31){
                        kprintf("# TLB over flow (3)");
                        Exit(1);
                }
 
                for(TLBEntry=TLBInfo.extendedTLB,TlbEndIndex=TLBInfo.NumExtendedTLBEntries+i; i<TlbEndIndex; i++,TLBEntry++,NumTlbEntries++){
                        _SetTLBEntry(i, TLBEntry->PageMask, TLBEntry->EntryHi, TLBEntry->EntryLo0, TLBEntry->EntryLo1);
                }
        }
 
        for(value=0xE0000000+(NumTlbEntries<<13); i<0x30; i++,value+=0x2000){
                _SetTLBEntry(i, 0, value, 0, 0);
        }
 
        return NumTlbEntries;
}

References _SetTLBEntry(), TLBInfo::defaultTLB, TLBEntry::EntryHi, TLBEntry::EntryLo0, TLBEntry::EntryLo1, Exit(), TLBInfo::extendedTLB, TLBInfo::kernelTLB, kprintf, TLBInfo::NumDefaultTLBEntries, TLBInfo::NumExtendedTLBEntries, TLBInfo::NumKernelTLBEntries, TLBInfo::NumWiredEntries, and TLBEntry::PageMask.

InitTLBFunctions()

void InitTLBFunctions

(

void

)

Definition at line 41 of file tlbfunc.c.

                           {
        int i;
 
        setup(SysEntry[0].syscall, SysEntry[0].function);
        Copy((void*)0x80075000, tlbsrc, size_tlbsrc);
        FlushCache(0);
        FlushCache(2);
        setup(SysEntry[1].syscall, SysEntry[1].function);
 
        for(i=3; i<8; i++){
                setup(SysEntry[i].syscall, GetEntryAddress(SysEntry[i].syscall));
        }
 
        _kExecArg = GetEntryAddress(3);
}

References _kExecArg, Copy(), FlushCache(), GetEntryAddress(), setup(), size_tlbsrc, SyscallData::syscall, SysEntry, and tlbsrc.

setup()

void setup	(	int	syscall,
		void *	function
	)

Referenced by InitTLBFunctions().

Variable Documentation

_kExecArg

char** _kExecArg

extern

Definition at line 26 of file tlbsrc.c.

Referenced by InitTLBFunctions().

defaultTLB

const struct TLBEntry defaultTLB[TLB_NUM_DEFAULT_ENTRIES]

static

Initial value:

={
        {0x0007E000, 0x00080000, 0x0000201F, 0x0000301F},
        {0x0007E000, 0x00100000, 0x0000401F, 0x0000501F},
        {0x0007E000, 0x00180000, 0x0000601F, 0x0000701F},
        {0x001FE000, 0x00200000, 0x0000801F, 0x0000C01F},
        {0x001FE000, 0x00400000, 0x0001001F, 0x0001401F},
        {0x001FE000, 0x00600000, 0x0001801F, 0x0001C01F},
        {0x007FE000, 0x00800000, 0x0002001F, 0x0003001F},
        {0x007FE000, 0x01000000, 0x0004001F, 0x0005001F},
        {0x007FE000, 0x01800000, 0x0006001F, 0x0007001F},
        {0x0007E000, 0x20080000, 0x00002017, 0x00003017},
        {0x0007E000, 0x20100000, 0x00004017, 0x00005017},
        {0x0007E000, 0x20180000, 0x00006017, 0x00007017},
        {0x001FE000, 0x20200000, 0x00008017, 0x0000C017},
        {0x001FE000, 0x20400000, 0x00010017, 0x00014017},
        {0x001FE000, 0x20600000, 0x00018017, 0x0001C017},
        {0x007FE000, 0x20800000, 0x00020017, 0x00030017},
        {0x007FE000, 0x21000000, 0x00040017, 0x00050017},
        {0x007FE000, 0x21800000, 0x00060017, 0x00070017}
}

Definition at line 57 of file tlbfunc.c.

extendTLB

const struct TLBEntry extendTLB[TLB_NUM_EXTENDED_ENTRIES]

static

Initial value:

={
        {0x0007E000, 0x30100000, 0x0000403F, 0x0000503F},
        {0x0007E000, 0x30180000, 0x0000603F, 0x0000703F},
        {0x001FE000, 0x30200000, 0x0000803F, 0x0000C03F},
        {0x001FE000, 0x30400000, 0x0001003F, 0x0001403F},
        {0x001FE000, 0x30600000, 0x0001803F, 0x0001C03F},
        {0x007FE000, 0x30800000, 0x0002003F, 0x0003003F},
        {0x007FE000, 0x31000000, 0x0004003F, 0x0005003F},
        {0x007FE000, 0x31800000, 0x0006003F, 0x0007003F}
}

Definition at line 57 of file tlbfunc.c.

kernelTLB

const struct TLBEntry kernelTLB[TLB_NUM_KERNEL_ENTRIES]

static

Initial value:

={
        {0x00000000, 0x70000000, 0x80000007, 0x00000007},
        {0x00006000, 0xFFFF8000, 0x00001E1F, 0x00001F1F},
        {0x00000000, 0x10000000, 0x00400017, 0x00400053},
        {0x00000000, 0x10002000, 0x00400097, 0x004000D7},
        {0x00000000, 0x10004000, 0x00400117, 0x00400157},
        {0x00000000, 0x10006000, 0x00400197, 0x004001D7},
        {0x00000000, 0x10008000, 0x00400217, 0x00400257},
        {0x00000000, 0x1000A000, 0x00400297, 0x004002D7},
        {0x00000000, 0x1000C000, 0x00400313, 0x00400357},
        {0x00000000, 0x1000E000, 0x00400397, 0x004003D7},
        {0x0001E000, 0x11000000, 0x00440017, 0x00440415},
        {0x0001E000, 0x12000000, 0x00480017, 0x00480415},
        {0x01FFE000, 0x1E000000, 0x00780017, 0x007C0017}
}

Definition at line 57 of file tlbfunc.c.

size_tlbsrc

unsigned int size_tlbsrc

extern

Referenced by InitTLBFunctions().

SysEntry

const struct SyscallData SysEntry[]

static

Initial value:

={
        {0x5A, &kCopy},
        {0x5B, (void*)0x80075000},
        {0x54, NULL},   
        {0x55, NULL},   
        {0x56, NULL},   
        {0x57, NULL},   
        {0x58, NULL},   
        {0x59, NULL},   
}

Definition at line 15 of file tlbfunc.c.

Referenced by InitTLBFunctions().

TLBInfo

struct TLBInfo TLBInfo ={TLB_NUM_KERNEL_ENTRIES, TLB_NUM_DEFAULT_ENTRIES, TLB_NUM_EXTENDED_ENTRIES, 0, kernelTLB, defaultTLB, extendTLB}

static

Definition at line 57 of file tlbfunc.c.

tlbsrc

unsigned char tlbsrc[]

extern

Referenced by InitTLBFunctions().