X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=Kernel%2Farch%2Fx86%2Fmm_virt.c;h=7cdf5cd8a4e8443e307d9f14c89d8009dd2bc1d2;hb=4b80e9762374558077e28e321d75029645529a45;hp=02bc9ac958eb0f93460f0400657aca6b323f2bd1;hpb=1e7db40300bc594cf708bb6082a6e05a268da946;p=tpg%2Facess2.git diff --git a/Kernel/arch/x86/mm_virt.c b/Kernel/arch/x86/mm_virt.c index 02bc9ac9..7cdf5cd8 100644 --- a/Kernel/arch/x86/mm_virt.c +++ b/Kernel/arch/x86/mm_virt.c @@ -9,29 +9,48 @@ * 0xFE - Unused * 0xFF - System Calls / Kernel's User Code */ -#define DEBUG 1 -#include +#define DEBUG 0 +#define SANITY 1 +#include +#include #include #include +#if USE_PAE +# define TAB 21 +# define DIR 30 +#else +# define TAB 22 +#endif + #define KERNEL_STACKS 0xF0000000 #define KERNEL_STACK_SIZE 0x00008000 -#define KERNEL_STACKS_END 0xFD000000 +#define KERNEL_STACKS_END 0xFC000000 #define WORKER_STACKS 0x00100000 // Thread0 Only! #define WORKER_STACK_SIZE KERNEL_STACK_SIZE #define WORKER_STACKS_END 0xB0000000 #define NUM_WORKER_STACKS ((WORKER_STACKS_END-WORKER_STACKS)/WORKER_STACK_SIZE) -#define PAGE_TABLE_ADDR 0xFD000000 -#define PAGE_DIR_ADDR 0xFD3F4000 -#define PAGE_CR3_ADDR 0xFD3F4FD0 -#define TMP_CR3_ADDR 0xFD3F4FD4 // Part of core instead of temp -#define TMP_DIR_ADDR 0xFD3F5000 // Same -#define TMP_TABLE_ADDR 0xFD400000 -#define HW_MAP_ADDR 0xFD800000 -#define HW_MAP_MAX 0xFEFF0000 + +#define PAE_PAGE_TABLE_ADDR 0xFC000000 // 16 MiB +#define PAE_PAGE_DIR_ADDR 0xFCFC0000 // 16 KiB +#define PAE_PAGE_PDPT_ADDR 0xFCFC3F00 // 32 bytes +#define PAE_TMP_PDPT_ADDR 0xFCFC3F20 // 32 bytes +#define PAE_TMP_DIR_ADDR 0xFCFE0000 // 16 KiB +#define PAE_TMP_TABLE_ADDR 0xFD000000 // 16 MiB + +#define PAGE_TABLE_ADDR 0xFC000000 +#define PAGE_DIR_ADDR 0xFC3F0000 +#define PAGE_CR3_ADDR 0xFC3F0FC0 +#define TMP_CR3_ADDR 0xFC3F0FC4 // Part of core instead of temp +#define TMP_DIR_ADDR 0xFC3F1000 // Same +#define TMP_TABLE_ADDR 0xFC400000 + +#define HW_MAP_ADDR 0xFE000000 +#define HW_MAP_MAX 0xFFEF0000 #define NUM_HW_PAGES ((HW_MAP_MAX-HW_MAP_ADDR)/0x1000) -#define TEMP_MAP_ADDR 0xFEFF0000 // Allows 16 "temp" pages +#define TEMP_MAP_ADDR 0xFFEF0000 // Allows 16 "temp" pages #define NUM_TEMP_PAGES 16 +#define LAST_BLOCK_ADDR 0xFFFF0000 // Free space for kernel provided user code/ *(-1) protection #define PF_PRESENT 0x1 #define PF_WRITE 0x2 @@ -41,26 +60,41 @@ #define INVLPG(addr) __asm__ __volatile__ ("invlpg (%0)"::"r"(addr)) +#if USE_PAE +typedef Uint64 tTabEnt; +#else +typedef Uint32 tTabEnt; +#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); // === GLOBALS === -tPAddr *gaPageTable = (void*)PAGE_TABLE_ADDR; -tPAddr *gaPageDir = (void*)PAGE_DIR_ADDR; -tPAddr *gaPageCR3 = (void*)PAGE_CR3_ADDR; -tPAddr *gaTmpTable = (void*)TMP_TABLE_ADDR; -tPAddr *gaTmpDir = (void*)TMP_DIR_ADDR; -tPAddr *gTmpCR3 = (void*)TMP_CR3_ADDR; +#define gaPageTable ((tTabEnt*)PAGE_TABLE_ADDR) +#define gaPageDir ((tTabEnt*)PAGE_DIR_ADDR) +#define gaTmpTable ((tTabEnt*)TMP_TABLE_ADDR) +#define gaTmpDir ((tTabEnt*)TMP_DIR_ADDR) +#define gpPageCR3 ((tTabEnt*)PAGE_CR3_ADDR) +#define gpTmpCR3 ((tTabEnt*)TMP_CR3_ADDR) + +#define gaPAE_PageTable ((tTabEnt*)PAE_PAGE_TABLE_ADDR) +#define gaPAE_PageDir ((tTabEnt*)PAE_PAGE_DIR_ADDR) +#define gaPAE_MainPDPT ((tTabEnt*)PAE_PAGE_PDPT_ADDR) +#define gaPAE_TmpTable ((tTabEnt*)PAE_TMP_DIR_ADDR) +#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; Uint32 gWorkerStacks[(NUM_WORKER_STACKS+31)/32]; @@ -68,23 +102,44 @@ Uint32 gWorkerStacks[(NUM_WORKER_STACKS+31)/32]; // === CODE === /** - * \fn void MM_PreinitVirtual() + * \fn void MM_PreinitVirtual(void) * \brief Maps the fractal mappings */ -void MM_PreinitVirtual() +void MM_PreinitVirtual(void) { - gaInitPageDir[ 0 ] = 0; - gaInitPageDir[ PAGE_TABLE_ADDR >> 22 ] = ((Uint)&gaInitPageDir - KERNEL_BASE) | 3; + #if USE_PAE + gaInitPageDir[ ((PAGE_TABLE_ADDR >> TAB)-3*512+3)*2 ] = ((tTabEnt)&gaInitPageDir - KERNEL_BASE) | 3; + #else + gaInitPageDir[ PAGE_TABLE_ADDR >> 22 ] = ((tTabEnt)&gaInitPageDir - KERNEL_BASE) | 3; + #endif + INVLPG( PAGE_TABLE_ADDR ); } /** - * \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; + #if USE_PAE + // --- Pre-Allocate kernel tables + for( i = KERNEL_BASE >> TAB; i < 1024*4; i ++ ) + { + if( gaPAE_PageDir[ i ] ) continue; + + // Skip stack tables, they are process unique + if( i > KERNEL_STACKS >> TAB && i < KERNEL_STACKS_END >> TAB) { + gaPAE_PageDir[ i ] = 0; + continue; + } + // Preallocate table + gaPAE_PageDir[ i ] = MM_AllocPhys() | 3; + INVLPG( &gaPAE_PageTable[i*512] ); + memset( &gaPAE_PageTable[i*512], 0, 0x1000 ); + } + #else // --- Pre-Allocate kernel tables for( i = KERNEL_BASE>>22; i < 1024; i ++ ) { @@ -99,6 +154,25 @@ void MM_InstallVirtual() INVLPG( &gaPageTable[i*1024] ); memset( &gaPageTable[i*1024], 0, 0x1000 ); } + #endif + + // Unset kernel on the User Text pages + for( i = ((tVAddr)&_UsertextEnd-(tVAddr)&_UsertextBase+0xFFF)/4096; i--; ) { + Log("MM_SetFlags( 0x%08x, 0, MM_PFLAG_KERNEL)", (tVAddr)&_UsertextBase + i*4096); + MM_SetFlags( (tVAddr)&_UsertextBase + i*4096, 0, MM_PFLAG_KERNEL ); + } +} + +/** + * \brief Cleans up the SMP required mappings + */ +void MM_FinishVirtualInit(void) +{ + #if USE_PAE + gaInitPDPT[ 0 ] = 0; + #else + gaInitPageDir[ 0 ] = 0; + #endif } /** @@ -122,6 +196,7 @@ void MM_PageFault(tVAddr Addr, Uint ErrorCode, tRegs *Regs) } else { + //Log("MM_PageFault: COW - MM_DuplicatePage(0x%x)", Addr); paddr = MM_DuplicatePage( Addr ); MM_DerefPhys( gaPageTable[Addr>>12] & ~0xFFF ); gaPageTable[Addr>>12] &= PF_USER; @@ -141,12 +216,14 @@ void MM_PageFault(tVAddr Addr, Uint ErrorCode, tRegs *Regs) (ErrorCode&1?"bad/locked":"non-present"), (ErrorCode&16?" (Instruction Fetch)":"") ); - Warning("User Pagefault: Instruction at %p accessed %p", Regs->eip, Addr); + Warning("User Pagefault: Instruction at %04x:%08x accessed %p", Regs->cs, Regs->eip, Addr); __asm__ __volatile__ ("sti"); // Restart IRQs Threads_SegFault(Addr); return ; } + Debug_KernelPanic(); + // -- Check Error Code -- if(ErrorCode & 8) Warning("Reserved Bits Trashed!"); @@ -253,13 +330,17 @@ void MM_DumpTables(tVAddr Start, tVAddr End) tPAddr MM_Allocate(tVAddr VAddr) { tPAddr paddr; + //ENTER("xVAddr", VAddr); + //__asm__ __volatile__ ("xchg %bx,%bx"); // Check if the directory is mapped if( gaPageDir[ VAddr >> 22 ] == 0 ) { // Allocate directory paddr = MM_AllocPhys(); + //LOG("paddr = 0x%llx (new table)", paddr); if( paddr == 0 ) { Warning("MM_Allocate - Out of Memory (Called by %p)", __builtin_return_address(0)); + //LEAVE('i',0); return 0; } // Map @@ -268,19 +349,23 @@ tPAddr MM_Allocate(tVAddr VAddr) if(VAddr < MM_USER_MAX) gaPageDir[ VAddr >> 22 ] |= PF_USER; INVLPG( &gaPageDir[ VAddr >> 22 ] ); + //LOG("Clearing new table"); memsetd( &gaPageTable[ (VAddr >> 12) & ~0x3FF ], 0, 1024 ); } // Check if the page is already allocated else if( gaPageTable[ VAddr >> 12 ] != 0 ) { Warning("MM_Allocate - Allocating to used address (%p)", VAddr); + //LEAVE('X', gaPageTable[ VAddr >> 12 ] & ~0xFFF); return gaPageTable[ VAddr >> 12 ] & ~0xFFF; } // Allocate paddr = MM_AllocPhys(); + //LOG("paddr = 0x%llx", paddr); if( paddr == 0 ) { Warning("MM_Allocate - Out of Memory when allocating at %p (Called by %p)", VAddr, __builtin_return_address(0)); + //LEAVE('i',0); return 0; } // Map @@ -290,6 +375,7 @@ tPAddr MM_Allocate(tVAddr VAddr) // Invalidate Cache for address INVLPG( VAddr & ~0xFFF ); + //LEAVE('X', paddr); return paddr; } @@ -327,27 +413,11 @@ tPAddr MM_GetPhysAddr(tVAddr 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)); } @@ -409,7 +479,7 @@ int MM_Map(tVAddr VAddr, tPAddr PAddr) * \fn tVAddr MM_ClearUser() * \brief Clear user's address space */ -tVAddr MM_ClearUser() +tVAddr MM_ClearUser(void) { Uint i, j; @@ -436,14 +506,14 @@ tVAddr MM_ClearUser() } INVLPG( gaPageDir ); - return *gaPageCR3; + return *gpPageCR3; } /** - * \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; @@ -454,13 +524,13 @@ tPAddr MM_Clone() LOCK( &gilTempFractal ); // Create Directory Table - *gTmpCR3 = MM_AllocPhys() | 3; + *gpTmpCR3 = MM_AllocPhys() | 3; INVLPG( gaTmpDir ); - //LOG("Allocated Directory (%x)", *gTmpCR3); + //LOG("Allocated Directory (%x)", *gpTmpCR3); memsetd( gaTmpDir, 0, 1024 ); // Copy Tables - for(i=0;i<768;i++) + for( i = 0; i < 768; i ++) { // Check if table is allocated if( !(gaPageDir[i] & PF_PRESENT) ) { @@ -498,7 +568,7 @@ tPAddr MM_Clone() { // Fractal if( i == (PAGE_TABLE_ADDR >> 22) ) { - gaTmpDir[ PAGE_TABLE_ADDR >> 22 ] = *gTmpCR3; + gaTmpDir[ PAGE_TABLE_ADDR >> 22 ] = *gpTmpCR3; continue; } @@ -558,7 +628,7 @@ tPAddr MM_Clone() } } - ret = *gTmpCR3 & ~0xFFF; + ret = *gpTmpCR3 & ~0xFFF; RELEASE( &gilTempFractal ); //LEAVE('x', ret); @@ -566,10 +636,10 @@ tPAddr MM_Clone() } /** - * \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; Uint i; @@ -634,8 +704,8 @@ tVAddr MM_NewWorkerStack() LOCK(&gilTempFractal); // Set the temp fractals to TID0's address space - *gTmpCR3 = ((Uint)gaInitPageDir - KERNEL_BASE) | 3; - //Log(" MM_NewWorkerStack: *gTmpCR3 = 0x%x", *gTmpCR3); + *gpTmpCR3 = ((Uint)gaInitPageDir - KERNEL_BASE) | 3; + //Log(" MM_NewWorkerStack: *gpTmpCR3 = 0x%x", *gpTmpCR3); INVLPG( gaTmpDir ); @@ -653,7 +723,7 @@ tVAddr MM_NewWorkerStack() pages[ addr >> 12 ] = MM_AllocPhys(); gaTmpTable[ (base + addr) >> 12 ] = pages[addr>>12] | 3; } - *gTmpCR3 = 0; + *gpTmpCR3 = 0; // Release the temp mapping lock RELEASE(&gilTempFractal); @@ -694,7 +764,7 @@ tVAddr MM_NewWorkerStack() */ void MM_SetFlags(tVAddr VAddr, Uint Flags, Uint Mask) { - tPAddr *ent; + tTabEnt *ent; if( !(gaPageDir[VAddr >> 22] & 1) ) return ; if( !(gaPageTable[VAddr >> 12] & 1) ) return ; @@ -703,15 +773,25 @@ void MM_SetFlags(tVAddr VAddr, Uint Flags, Uint Mask) // 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 @@ -726,6 +806,33 @@ void MM_SetFlags(tVAddr VAddr, Uint Flags, Uint Mask) *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; } /** @@ -738,6 +845,8 @@ tPAddr MM_DuplicatePage(tVAddr VAddr) Uint temp; int wasRO = 0; + //ENTER("xVAddr", VAddr); + // Check if mapped if( !(gaPageDir [VAddr >> 22] & PF_PRESENT) ) return 0; if( !(gaPageTable[VAddr >> 12] & PF_PRESENT) ) return 0; @@ -762,6 +871,7 @@ tPAddr MM_DuplicatePage(tVAddr VAddr) if(!wasRO) gaPageTable[VAddr >> 12] |= PF_WRITE; INVLPG(VAddr); + //LEAVE('X', ret); return ret; } @@ -816,10 +926,10 @@ void MM_FreeTemp(tVAddr VAddr) } /** - * \fn tVAddr MM_MapHWPage(tPAddr PAddr, Uint Number) + * \fn tVAddr MM_MapHWPages(tPAddr PAddr, Uint Number) * \brief Allocates a contigous number of pages */ -tVAddr MM_MapHWPage(tPAddr PAddr, Uint Number) +tVAddr MM_MapHWPages(tPAddr PAddr, Uint Number) { int i, j; @@ -883,7 +993,7 @@ tVAddr MM_AllocDMA(int Pages, int MaxBits, tPAddr *PhysAddr) { phys = MM_AllocPhys(); *PhysAddr = phys; - ret = MM_MapHWPage(phys, 1); + ret = MM_MapHWPages(phys, 1); if(ret == 0) { MM_DerefPhys(phys); LEAVE('i', 0); @@ -894,24 +1004,15 @@ tVAddr MM_AllocDMA(int Pages, int MaxBits, tPAddr *PhysAddr) } // Slow Allocate - phys = MM_AllocPhysRange(Pages); + phys = MM_AllocPhysRange(Pages, MaxBits); // - Was it allocated? if(phys == 0) { LEAVE('i', 0); return 0; } - // - Check if the memory is OK - if(phys + (Pages-1)*0x1000 > maxCheck) - { - // Deallocate and return 0 - for(;Pages--;phys+=0x1000) - MM_DerefPhys(phys); - LEAVE('i', 0); - return 0; - } // Allocated successfully, now map - ret = MM_MapHWPage(phys, Pages); + ret = MM_MapHWPages(phys, Pages); if( ret == 0 ) { // If it didn't map, free then return 0 for(;Pages--;phys+=0x1000) @@ -926,23 +1027,27 @@ tVAddr MM_AllocDMA(int Pages, int MaxBits, tPAddr *PhysAddr) } /** - * \fn void MM_UnmapHWPage(tVAddr VAddr, Uint Number) + * \fn void MM_UnmapHWPages(tVAddr VAddr, Uint Number) * \brief Unmap a hardware page */ -void MM_UnmapHWPage(tVAddr VAddr, Uint Number) +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 + 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 ); @@ -952,6 +1057,6 @@ void MM_UnmapHWPage(tVAddr VAddr, Uint Number) EXPORT(MM_GetPhysAddr); EXPORT(MM_Map); //EXPORT(MM_Unmap); -EXPORT(MM_MapHWPage); +EXPORT(MM_MapHWPages); EXPORT(MM_AllocDMA); -EXPORT(MM_UnmapHWPage); +EXPORT(MM_UnmapHWPages);