#define DEBUG 0
#define SANITY 1
#include <acess.h>
+#include <mm_virt.h>
#include <mm_phys.h>
#include <proc.h>
#endif
// === IMPORTS ===
+extern void _UsertextEnd, _UsertextBase;
extern Uint32 gaInitPageDir[1024];
extern Uint32 gaInitPageTable[1024];
extern void Threads_SegFault(tVAddr Addr);
extern void Error_Backtrace(Uint eip, Uint ebp);
// === PROTOTYPES ===
-void MM_PreinitVirtual();
-void MM_InstallVirtual();
+void MM_PreinitVirtual(void);
+void MM_InstallVirtual(void);
void MM_PageFault(tVAddr Addr, Uint ErrorCode, tRegs *Regs);
void MM_DumpTables(tVAddr Start, tVAddr End);
tPAddr MM_DuplicatePage(tVAddr VAddr);
#define gaPAE_TmpDir ((tTabEnt*)PAE_TMP_DIR_ADDR)
#define gaPAE_TmpPDPT ((tTabEnt*)PAE_TMP_PDPT_ADDR)
int gbUsePAE = 0;
- int gilTempMappings = 0;
- int gilTempFractal = 0;
+tMutex glTempMappings;
+tMutex glTempFractal;
Uint32 gWorkerStacks[(NUM_WORKER_STACKS+31)/32];
int giLastUsedWorker = 0;
// === CODE ===
/**
- * \fn void MM_PreinitVirtual()
+ * \fn void MM_PreinitVirtual(void)
* \brief Maps the fractal mappings
*/
-void MM_PreinitVirtual()
+void MM_PreinitVirtual(void)
{
#if USE_PAE
gaInitPageDir[ ((PAGE_TABLE_ADDR >> TAB)-3*512+3)*2 ] = ((tTabEnt)&gaInitPageDir - KERNEL_BASE) | 3;
}
/**
- * \fn void MM_InstallVirtual()
+ * \fn void MM_InstallVirtual(void)
* \brief Sets up the constant page mappings
*/
-void MM_InstallVirtual()
+void MM_InstallVirtual(void)
{
int i;
memset( &gaPageTable[i*1024], 0, 0x1000 );
}
#endif
+
+ // Unset kernel on the User Text pages
+ for( i = ((tVAddr)&_UsertextEnd-(tVAddr)&_UsertextBase+0xFFF)/4096; i--; ) {
+ MM_SetFlags( (tVAddr)&_UsertextBase + i*4096, 0, MM_PFLAG_KERNEL );
+ }
}
/**
* \brief Cleans up the SMP required mappings
*/
-void MM_FinishVirtualInit()
+void MM_FinishVirtualInit(void)
{
#if USE_PAE
gaInitPDPT[ 0 ] = 0;
return ;
}
+ Debug_KernelPanic();
+
// -- Check Error Code --
if(ErrorCode & 8)
Warning("Reserved Bits Trashed!");
//MM_DumpTables(0, -1);
+ // Register Dump
+ Log("EAX %08x ECX %08x EDX %08x EBX %08x", Regs->eax, Regs->ecx, Regs->edx, Regs->ebx);
+ Log("ESP %08x EBP %08x ESI %08x EDI %08x", Regs->esp, Regs->ebp, Regs->esi, Regs->edi);
+ //Log("SS:ESP %04x:%08x", Regs->ss, Regs->esp);
+ Log("CS:EIP %04x:%08x", Regs->cs, Regs->eip);
+ Log("DS %04x ES %04x FS %04x GS %04x", Regs->ds, Regs->es, Regs->fs, Regs->gs);
+ {
+ Uint dr0, dr1;
+ __ASM__ ("mov %%dr0, %0":"=r"(dr0):);
+ __ASM__ ("mov %%dr1, %0":"=r"(dr1):);
+ Log("DR0 %08x DR1 %08x", dr0, dr1);
+ }
+
Panic("Page Fault at 0x%x (Accessed 0x%x)", Regs->eip, Addr);
}
return (gaPageTable[Addr >> 12] & ~0xFFF) | (Addr & 0xFFF);
}
-
-/**
- * \fn int MM_IsUser(tVAddr VAddr)
- * \brief Checks if a page is user accessable
- */
-int MM_IsUser(tVAddr VAddr)
-{
- if( !(gaPageDir[VAddr >> 22] & 1) )
- return 0;
- if( !(gaPageTable[VAddr >> 12] & 1) )
- return 0;
- if( !(gaPageTable[VAddr >> 12] & PF_USER) )
- return 0;
- return 1;
-}
-
/**
- * \fn void MM_SetCR3(tPAddr CR3)
+ * \fn void MM_SetCR3(Uint CR3)
* \brief Sets the current process space
*/
-void MM_SetCR3(tPAddr CR3)
+void MM_SetCR3(Uint CR3)
{
__asm__ __volatile__ ("mov %0, %%cr3"::"r"(CR3));
}
* \fn tVAddr MM_ClearUser()
* \brief Clear user's address space
*/
-tVAddr MM_ClearUser()
+tVAddr MM_ClearUser(void)
{
Uint i, j;
}
/**
- * \fn tPAddr MM_Clone()
+ * \fn tPAddr MM_Clone(void)
* \brief Clone the current address space
*/
-tPAddr MM_Clone()
+tPAddr MM_Clone(void)
{
Uint i, j;
tVAddr ret;
tVAddr kStackBase = Proc_GetCurThread()->KernelStack - KERNEL_STACK_SIZE;
void *tmp;
- LOCK( &gilTempFractal );
+ Mutex_Acquire( &glTempFractal );
// Create Directory Table
*gpTmpCR3 = MM_AllocPhys() | 3;
//LOG("Allocated Directory (%x)", *gpTmpCR3);
memsetd( gaTmpDir, 0, 1024 );
- // Copy Tables
- for( i = 0; i < 768; i ++)
- {
- // Check if table is allocated
- if( !(gaPageDir[i] & PF_PRESENT) ) {
- gaTmpDir[i] = 0;
- page += 1024;
- continue;
- }
-
- // Allocate new table
- gaTmpDir[i] = MM_AllocPhys() | (gaPageDir[i] & 7);
- INVLPG( &gaTmpTable[page] );
- // Fill
- for( j = 0; j < 1024; j ++, page++ )
+ if( Threads_GetPID() != 0 )
+ {
+ // Copy Tables
+ for( i = 0; i < 768; i ++)
{
- if( !(gaPageTable[page] & PF_PRESENT) ) {
- gaTmpTable[page] = 0;
+ // Check if table is allocated
+ if( !(gaPageDir[i] & PF_PRESENT) ) {
+ gaTmpDir[i] = 0;
+ page += 1024;
continue;
}
- // Refrence old page
- MM_RefPhys( gaPageTable[page] & ~0xFFF );
- // Add to new table
- if(gaPageTable[page] & PF_WRITE) {
- gaTmpTable[page] = (gaPageTable[page] & ~PF_WRITE) | PF_COW;
- gaPageTable[page] = (gaPageTable[page] & ~PF_WRITE) | PF_COW;
- INVLPG( page << 12 );
+ // Allocate new table
+ gaTmpDir[i] = MM_AllocPhys() | (gaPageDir[i] & 7);
+ INVLPG( &gaTmpTable[page] );
+ // Fill
+ for( j = 0; j < 1024; j ++, page++ )
+ {
+ if( !(gaPageTable[page] & PF_PRESENT) ) {
+ gaTmpTable[page] = 0;
+ continue;
+ }
+
+ // Refrence old page
+ MM_RefPhys( gaPageTable[page] & ~0xFFF );
+ // Add to new table
+ if(gaPageTable[page] & PF_WRITE) {
+ gaTmpTable[page] = (gaPageTable[page] & ~PF_WRITE) | PF_COW;
+ gaPageTable[page] = (gaPageTable[page] & ~PF_WRITE) | PF_COW;
+ INVLPG( page << 12 );
+ }
+ else
+ gaTmpTable[page] = gaPageTable[page];
}
- else
- gaTmpTable[page] = gaPageTable[page];
}
}
}
ret = *gpTmpCR3 & ~0xFFF;
- RELEASE( &gilTempFractal );
+ Mutex_Release( &glTempFractal );
//LEAVE('x', ret);
return ret;
}
/**
- * \fn tVAddr MM_NewKStack()
+ * \fn tVAddr MM_NewKStack(void)
* \brief Create a new kernel stack
*/
-tVAddr MM_NewKStack()
+tVAddr MM_NewKStack(void)
{
- tVAddr base = KERNEL_STACKS;
+ tVAddr base;
Uint i;
- for(;base<KERNEL_STACKS_END;base+=KERNEL_STACK_SIZE)
+ for(base = KERNEL_STACKS; base < KERNEL_STACKS_END; base += KERNEL_STACK_SIZE)
{
if(MM_GetPhysAddr(base) != 0) continue;
- for(i=0;i<KERNEL_STACK_SIZE;i+=0x1000) {
+ for(i = 0; i < KERNEL_STACK_SIZE; i += 0x1000) {
MM_Allocate(base+i);
}
+ Log("MM_NewKStack - Allocated %p", base + KERNEL_STACK_SIZE);
return base+KERNEL_STACK_SIZE;
}
Warning("MM_NewKStack - No address space left\n");
__asm__ __volatile__ ("mov %%esp, %0": "=r"(esp));
__asm__ __volatile__ ("mov %%ebp, %0": "=r"(ebp));
+ // TODO: Thread safety
// Find a free worker stack address
for(base = giLastUsedWorker; base < NUM_WORKER_STACKS; base++)
{
//Log(" MM_NewWorkerStack: base = 0x%x", base);
// Acquire the lock for the temp fractal mappings
- LOCK(&gilTempFractal);
+ Mutex_Acquire(&glTempFractal);
// Set the temp fractals to TID0's address space
*gpTmpCR3 = ((Uint)gaInitPageDir - KERNEL_BASE) | 3;
// Mapping Time!
for( addr = 0; addr < WORKER_STACK_SIZE; addr += 0x1000 )
+ //for( addr = WORKER_STACK_SIZE; addr; addr -= 0x1000 )
{
pages[ addr >> 12 ] = MM_AllocPhys();
gaTmpTable[ (base + addr) >> 12 ] = pages[addr>>12] | 3;
}
*gpTmpCR3 = 0;
// Release the temp mapping lock
- RELEASE(&gilTempFractal);
+ Mutex_Release(&glTempFractal);
// Copy the old stack
oldstack = (esp + KERNEL_STACK_SIZE-1) & ~(KERNEL_STACK_SIZE-1);
// Read-Only
if( Mask & MM_PFLAG_RO )
{
- if( Flags & MM_PFLAG_RO ) *ent &= ~PF_WRITE;
- else *ent |= PF_WRITE;
+ if( Flags & MM_PFLAG_RO ) {
+ *ent &= ~PF_WRITE;
+ }
+ else {
+ gaPageDir[VAddr >> 22] |= PF_WRITE;
+ *ent |= PF_WRITE;
+ }
}
// Kernel
if( Mask & MM_PFLAG_KERNEL )
{
- if( Flags & MM_PFLAG_KERNEL ) *ent &= ~PF_USER;
- else *ent |= PF_USER;
+ if( Flags & MM_PFLAG_KERNEL ) {
+ *ent &= ~PF_USER;
+ }
+ else {
+ gaPageDir[VAddr >> 22] |= PF_USER;
+ *ent |= PF_USER;
+ }
}
// Copy-On-Write
*ent |= PF_WRITE;
}
}
+
+ //Log("MM_SetFlags: *ent = 0x%08x, gaPageDir[%i] = 0x%08x",
+ // *ent, VAddr >> 22, gaPageDir[VAddr >> 22]);
+}
+
+/**
+ * \brief Get the flags on a page
+ */
+Uint MM_GetFlags(tVAddr VAddr)
+{
+ tTabEnt *ent;
+ Uint ret = 0;
+
+ // Validity Check
+ if( !(gaPageDir[VAddr >> 22] & 1) ) return 0;
+ if( !(gaPageTable[VAddr >> 12] & 1) ) return 0;
+
+ ent = &gaPageTable[VAddr >> 12];
+
+ // Read-Only
+ if( !(*ent & PF_WRITE) ) ret |= MM_PFLAG_RO;
+ // Kernel
+ if( !(*ent & PF_USER) ) ret |= MM_PFLAG_KERNEL;
+ // Copy-On-Write
+ if( *ent & PF_COW ) ret |= MM_PFLAG_COW;
+
+ return ret;
}
/**
PAddr &= ~0xFFF;
- //LOG("gilTempMappings = %i", gilTempMappings);
+ //LOG("glTempMappings = %i", glTempMappings);
for(;;)
{
- LOCK( &gilTempMappings );
+ Mutex_Acquire( &glTempMappings );
for( i = 0; i < NUM_TEMP_PAGES; i ++ )
{
gaPageTable[ (TEMP_MAP_ADDR >> 12) + i ] = PAddr | 3;
INVLPG( TEMP_MAP_ADDR + (i << 12) );
//LEAVE('p', TEMP_MAP_ADDR + (i << 12));
- RELEASE( &gilTempMappings );
+ Mutex_Release( &glTempMappings );
return TEMP_MAP_ADDR + (i << 12);
}
- RELEASE( &gilTempMappings );
- Threads_Yield();
+ Mutex_Release( &glTempMappings );
+ Threads_Yield(); // TODO: Use a sleep queue here instead
}
}
void MM_UnmapHWPages(tVAddr VAddr, Uint Number)
{
int i, j;
+
+ //Log_Debug("VirtMem", "MM_UnmapHWPages: (VAddr=0x%08x, Number=%i)", VAddr, Number);
+
// Sanity Check
- if(VAddr < HW_MAP_ADDR || VAddr-Number*0x1000 > HW_MAP_MAX) return;
+ if(VAddr < HW_MAP_ADDR || VAddr+Number*0x1000 > HW_MAP_MAX) return;
i = VAddr >> 12;
- LOCK( &gilTempMappings ); // Temp and HW share a directory, so they share a lock
+ Mutex_Acquire( &glTempMappings ); // Temp and HW share a directory, so they share a lock
for( j = 0; j < Number; j++ )
{
- MM_DerefPhys( gaPageTable[ (HW_MAP_ADDR >> 12) + i + j ] );
- gaPageTable[ (HW_MAP_ADDR >> 12) + i + j ] = 0;
+ MM_DerefPhys( gaPageTable[ i + j ] & ~0xFFF );
+ gaPageTable[ i + j ] = 0;
}
- RELEASE( &gilTempMappings );
+ Mutex_Release( &glTempMappings );
}
// --- EXPORTS ---
git.ucc.asn.au / tpg / acess2.git / blobdiff
UCC git Repository :: git.ucc.asn.au