X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/6601e61aa18bf4f09af135ff61fc7f4771d23b06..0c530ab8987f0ae6a1a3d9284f40182b88852816:/osfmk/i386/commpage/commpage.c diff --git a/osfmk/i386/commpage/commpage.c b/osfmk/i386/commpage/commpage.c index 6a729039d..5e347ac29 100644 --- a/osfmk/i386/commpage/commpage.c +++ b/osfmk/i386/commpage/commpage.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2003 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2003-2006 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * @@ -23,18 +23,18 @@ /* * Here's what to do if you want to add a new routine to the comm page: * - * 1. Add a definition for it's address in osfmk/ppc/cpu_capabilities.h, + * 1. Add a definition for it's address in osfmk/i386/cpu_capabilities.h, * being careful to reserve room for future expansion. * * 2. Write one or more versions of the routine, each with it's own * commpage_descriptor. The tricky part is getting the "special", * "musthave", and "canthave" fields right, so that exactly one * version of the routine is selected for every machine. - * The source files should be in osfmk/ppc/commpage/. + * The source files should be in osfmk/i386/commpage/. * * 3. Add a ptr to your new commpage_descriptor(s) in the "routines" - * array in commpage_populate(). Of course, you'll also have to - * declare them "extern" in commpage_populate(). + * array in osfmk/i386/commpage/commpage_asm.s. There are two + * arrays, one for the 32-bit and one for the 64-bit commpage. * * 4. Write the code in Libc to use the new routine. */ @@ -43,6 +43,7 @@ #include #include #include +#include #include #include #include @@ -50,16 +51,34 @@ #include #include +#include -extern vm_map_t com_region_map32; // the shared submap, set up in vm init +/* the lists of commpage routines are in commpage_asm.s */ +extern commpage_descriptor* commpage_32_routines[]; +extern commpage_descriptor* commpage_64_routines[]; -static uintptr_t next = 0; // next available byte in comm page -static int cur_routine = 0; // comm page address of "current" routine -static int matched; // true if we've found a match for "current" routine +/* translated commpage descriptors from commpage_sigs.c */ +extern commpage_descriptor sigdata_descriptor; +extern commpage_descriptor *ba_descriptors[]; + +extern vm_map_t com_region_map32; // the shared submap, set up in vm init +extern vm_map_t com_region_map64; // the shared submap, set up in vm init +char *commPagePtr32 = NULL; // virtual addr in kernel map of 32-bit commpage +char *commPagePtr64 = NULL; // ...and of 64-bit commpage int _cpu_capabilities = 0; // define the capability vector -char *commPagePtr = NULL; // virtual address of comm page in kernel map +int noVMX = 0; /* if true, do not set kHasAltivec in ppc _cpu_capabilities */ + +void* dsmos_blobs[3]; /* ptrs to the system integrity data in each commpage */ +int dsmos_blob_count = 0; + +static uintptr_t next; // next available byte in comm page +static int cur_routine; // comm page address of "current" routine +static int matched; // true if we've found a match for "current" routine + +static char *commPagePtr; // virtual addr in kernel map of commpage we are working on +static size_t commPageBaseOffset; // add to 32-bit runtime address to get offset in commpage /* Allocate the commpage and add to the shared submap created by vm: * 1. allocate a page in the kernel map (RW) @@ -69,59 +88,61 @@ char *commPagePtr = NULL; // virtual address of comm page in kerne */ static void* -commpage_allocate( void ) +commpage_allocate( + vm_map_t submap, // com_region_map32 or com_region_map64 + size_t area_used ) // _COMM_PAGE32_AREA_USED or _COMM_PAGE64_AREA_USED { - vm_offset_t kernel_addr; // address of commpage in kernel map - vm_offset_t zero = 0; - vm_size_t size = _COMM_PAGE_AREA_LENGTH; - vm_map_entry_t entry; - ipc_port_t handle; - - if (com_region_map32 == NULL) - panic("commpage map is null"); - - if (vm_allocate(kernel_map,&kernel_addr,_COMM_PAGE_AREA_LENGTH,VM_FLAGS_ANYWHERE)) - panic("cannot allocate commpage"); - - if (vm_map_wire(kernel_map,kernel_addr,kernel_addr+_COMM_PAGE_AREA_LENGTH,VM_PROT_DEFAULT,FALSE)) - panic("cannot wire commpage"); - - /* - * Now that the object is created and wired into the kernel map, mark it so that no delay - * copy-on-write will ever be performed on it as a result of mapping it into user-space. - * If such a delayed copy ever occurred, we could remove the kernel's wired mapping - and - * that would be a real disaster. - * - * JMM - What we really need is a way to create it like this in the first place. - */ - if (!vm_map_lookup_entry( kernel_map, vm_map_trunc_page(kernel_addr), &entry) || entry->is_sub_map) - panic("cannot find commpage entry"); - entry->object.vm_object->copy_strategy = MEMORY_OBJECT_COPY_NONE; - - if (mach_make_memory_entry( kernel_map, // target map - &size, // size - kernel_addr, // offset (address in kernel map) - VM_PROT_DEFAULT, // map it RW - &handle, // this is the object handle we get - NULL )) // parent_entry (what is this?) - panic("cannot make entry for commpage"); - - if (vm_map_64( com_region_map32, // target map (shared submap) - &zero, // address (map into 1st page in submap) - _COMM_PAGE_AREA_LENGTH, // size - 0, // mask - VM_FLAGS_FIXED, // flags (it must be 1st page in submap) - handle, // port is the memory entry we just made - 0, // offset (map 1st page in memory entry) - FALSE, // copy - VM_PROT_READ, // cur_protection (R-only in user map) - VM_PROT_READ, // max_protection - VM_INHERIT_SHARE )) // inheritance - panic("cannot map commpage"); - - ipc_port_release(handle); - - return (void*) kernel_addr; // return address in kernel map + vm_offset_t kernel_addr; // address of commpage in kernel map + vm_offset_t zero = 0; + vm_size_t size = area_used; // size actually populated + vm_map_entry_t entry; + ipc_port_t handle; + + if (submap == NULL) + panic("commpage submap is null"); + + if (vm_allocate(kernel_map,&kernel_addr,area_used,VM_FLAGS_ANYWHERE)) + panic("cannot allocate commpage"); + + if (vm_map_wire(kernel_map,kernel_addr,kernel_addr+area_used,VM_PROT_DEFAULT,FALSE)) + panic("cannot wire commpage"); + + /* + * Now that the object is created and wired into the kernel map, mark it so that no delay + * copy-on-write will ever be performed on it as a result of mapping it into user-space. + * If such a delayed copy ever occurred, we could remove the kernel's wired mapping - and + * that would be a real disaster. + * + * JMM - What we really need is a way to create it like this in the first place. + */ + if (!vm_map_lookup_entry( kernel_map, vm_map_trunc_page(kernel_addr), &entry) || entry->is_sub_map) + panic("cannot find commpage entry"); + entry->object.vm_object->copy_strategy = MEMORY_OBJECT_COPY_NONE; + + if (mach_make_memory_entry( kernel_map, // target map + &size, // size + kernel_addr, // offset (address in kernel map) + VM_PROT_DEFAULT, // map it RW + &handle, // this is the object handle we get + NULL )) // parent_entry (what is this?) + panic("cannot make entry for commpage"); + + if (vm_map_64( submap, // target map (shared submap) + &zero, // address (map into 1st page in submap) + area_used, // size + 0, // mask + VM_FLAGS_FIXED, // flags (it must be 1st page in submap) + handle, // port is the memory entry we just made + 0, // offset (map 1st page in memory entry) + FALSE, // copy + VM_PROT_READ, // cur_protection (R-only in user map) + VM_PROT_READ, // max_protection + VM_INHERIT_SHARE )) // inheritance + panic("cannot map commpage"); + + ipc_port_release(handle); + + return (void*) kernel_addr; // return address in kernel map } /* Get address (in kernel map) of a commpage field. */ @@ -130,7 +151,7 @@ static void* commpage_addr_of( int addr_at_runtime ) { - return (void*) ((uintptr_t)commPagePtr + addr_at_runtime - _COMM_PAGE_BASE_ADDRESS); + return (void*) ((uintptr_t)commPagePtr + addr_at_runtime - commPageBaseOffset); } /* Determine number of CPUs on this system. We cannot rely on @@ -164,6 +185,9 @@ commpage_init_cpu_capabilities( void ) ml_cpu_get_info(&cpu_info); switch (cpu_info.vector_unit) { + case 6: + bits |= kHasSupplementalSSE3; + /* fall thru */ case 5: bits |= kHasSSE3; /* fall thru */ @@ -200,15 +224,24 @@ commpage_init_cpu_capabilities( void ) bits |= kFastThreadLocalStorage; // we use %gs for TLS + if (cpu_mode_is64bit()) // k64Bit means processor is 64-bit capable + bits |= k64Bit; + _cpu_capabilities = bits; // set kernel version for use by drivers etc } +int +_get_cpu_capabilities() +{ + return _cpu_capabilities; +} + /* Copy data into commpage. */ static void commpage_stuff( int address, - void *source, + const void *source, int length ) { void *dest = commpage_addr_of(address); @@ -221,13 +254,38 @@ commpage_stuff( next = ((uintptr_t)dest + length); } +static void +commpage_stuff_swap( + int address, + void *source, + int length, + int legacy ) +{ + if ( legacy ) { + void *dest = commpage_addr_of(address); + dest = (void *)((uintptr_t) dest + _COMM_PAGE_SIGS_OFFSET); + switch (length) { + case 2: + OSWriteSwapInt16(dest, 0, *(uint16_t *)source); + break; + case 4: + OSWriteSwapInt32(dest, 0, *(uint32_t *)source); + break; + case 8: + OSWriteSwapInt64(dest, 0, *(uint64_t *)source); + break; + } + } +} static void commpage_stuff2( - int address, - void *source, - int length ) + int address, + void *source, + int length, + int legacy ) { + commpage_stuff_swap(address, source, length, legacy); commpage_stuff(address, source, length); } @@ -241,7 +299,7 @@ commpage_stuff_routine( if (rd->commpage_address != cur_routine) { if ((cur_routine!=0) && (matched==0)) - panic("commpage no match"); + panic("commpage no match for last, next address %08x", rd->commpage_address); cur_routine = rd->commpage_address; matched = 0; } @@ -251,100 +309,60 @@ commpage_stuff_routine( if ((must == rd->musthave) && (cant == 0)) { if (matched) - panic("commpage duplicate matches"); + panic("commpage multiple matches for address %08x", rd->commpage_address); matched = 1; commpage_stuff(rd->commpage_address,rd->code_address,rd->code_length); } } - -#define COMMPAGE_DESC(name) commpage_ ## name -#define EXTERN_COMMPAGE_DESC(name) \ - extern commpage_descriptor COMMPAGE_DESC(name) - -EXTERN_COMMPAGE_DESC(compare_and_swap32_mp); -EXTERN_COMMPAGE_DESC(compare_and_swap32_up); -EXTERN_COMMPAGE_DESC(compare_and_swap64_mp); -EXTERN_COMMPAGE_DESC(compare_and_swap64_up); -EXTERN_COMMPAGE_DESC(atomic_add32_mp); -EXTERN_COMMPAGE_DESC(atomic_add32_up); -EXTERN_COMMPAGE_DESC(mach_absolute_time); -EXTERN_COMMPAGE_DESC(spin_lock_try_mp); -EXTERN_COMMPAGE_DESC(spin_lock_try_up); -EXTERN_COMMPAGE_DESC(spin_lock_mp); -EXTERN_COMMPAGE_DESC(spin_lock_up); -EXTERN_COMMPAGE_DESC(spin_unlock); -EXTERN_COMMPAGE_DESC(pthread_getspecific); -EXTERN_COMMPAGE_DESC(gettimeofday); -EXTERN_COMMPAGE_DESC(sys_flush_dcache); -EXTERN_COMMPAGE_DESC(sys_icache_invalidate); -EXTERN_COMMPAGE_DESC(pthread_self); -EXTERN_COMMPAGE_DESC(relinquish); -EXTERN_COMMPAGE_DESC(bit_test_and_set_mp); -EXTERN_COMMPAGE_DESC(bit_test_and_set_up); -EXTERN_COMMPAGE_DESC(bit_test_and_clear_mp); -EXTERN_COMMPAGE_DESC(bit_test_and_clear_up); -EXTERN_COMMPAGE_DESC(bzero_scalar); -EXTERN_COMMPAGE_DESC(bcopy_scalar); -EXTERN_COMMPAGE_DESC(nanotime); - -static commpage_descriptor *routines[] = { - &COMMPAGE_DESC(compare_and_swap32_mp), - &COMMPAGE_DESC(compare_and_swap32_up), - &COMMPAGE_DESC(compare_and_swap64_mp), - &COMMPAGE_DESC(compare_and_swap64_up), - &COMMPAGE_DESC(atomic_add32_mp), - &COMMPAGE_DESC(atomic_add32_up), - &COMMPAGE_DESC(mach_absolute_time), - &COMMPAGE_DESC(spin_lock_try_mp), - &COMMPAGE_DESC(spin_lock_try_up), - &COMMPAGE_DESC(spin_lock_mp), - &COMMPAGE_DESC(spin_lock_up), - &COMMPAGE_DESC(spin_unlock), - &COMMPAGE_DESC(pthread_getspecific), - &COMMPAGE_DESC(gettimeofday), - &COMMPAGE_DESC(sys_flush_dcache), - &COMMPAGE_DESC(sys_icache_invalidate), - &COMMPAGE_DESC(pthread_self), - &COMMPAGE_DESC(relinquish), - &COMMPAGE_DESC(bit_test_and_set_mp), - &COMMPAGE_DESC(bit_test_and_set_up), - &COMMPAGE_DESC(bit_test_and_clear_mp), - &COMMPAGE_DESC(bit_test_and_clear_up), - &COMMPAGE_DESC(bzero_scalar), - &COMMPAGE_DESC(bcopy_scalar), - &COMMPAGE_DESC(nanotime), - NULL -}; - - -/* Fill in commpage: called once, during kernel initialization, from the - * startup thread before user-mode code is running. - * See the top of this file for a list of what you have to do to add - * a new routine to the commpage. +/* Fill in the 32- or 64-bit commpage. Called once for each. + * The 32-bit ("legacy") commpage has a bunch of stuff added to it + * for translated processes, some of which is byte-swapped. */ -void -commpage_populate( void ) +static void +commpage_populate_one( + vm_map_t submap, // com_region_map32 or com_region_map64 + char ** kernAddressPtr, // &commPagePtr32 or &commPagePtr64 + size_t area_used, // _COMM_PAGE32_AREA_USED or _COMM_PAGE64_AREA_USED + size_t base_offset, // will become commPageBaseOffset + commpage_descriptor** commpage_routines, // list of routine ptrs for this commpage + boolean_t legacy, // true if 32-bit commpage + const char* signature ) // "commpage 32-bit" or "commpage 64-bit" { short c2; static double two52 = 1048576.0 * 1048576.0 * 4096.0; // 2**52 static double ten6 = 1000000.0; // 10**6 commpage_descriptor **rd; short version = _COMM_PAGE_THIS_VERSION; + int swapcaps; - commPagePtr = (char *)commpage_allocate(); - - commpage_init_cpu_capabilities(); + next = (uintptr_t) NULL; + cur_routine = 0; + commPagePtr = (char *)commpage_allocate( submap, (vm_size_t) area_used ); + *kernAddressPtr = commPagePtr; // save address either in commPagePtr32 or 64 + commPageBaseOffset = base_offset; /* Stuff in the constants. We move things into the comm page in strictly * ascending order, so we can check for overlap and panic if so. */ - - commpage_stuff2(_COMM_PAGE_VERSION,&version,sizeof(short)); - commpage_stuff(_COMM_PAGE_CPU_CAPABILITIES,&_cpu_capabilities, - sizeof(int)); + commpage_stuff(_COMM_PAGE_SIGNATURE,signature,strlen(signature)); + commpage_stuff2(_COMM_PAGE_VERSION,&version,sizeof(short),legacy); + commpage_stuff(_COMM_PAGE_CPU_CAPABILITIES,&_cpu_capabilities,sizeof(int)); + + /* excuse our magic constants, we cannot include ppc/cpu_capabilities.h */ + /* always set kCache32 and kDcbaAvailable */ + swapcaps = 0x44; + if ( _cpu_capabilities & kUP ) + swapcaps |= (kUP + (1 << kNumCPUsShift)); + else + swapcaps |= 2 << kNumCPUsShift; /* limit #cpus to 2 */ + if ( ! noVMX ) /* if rosetta will be emulating altivec... */ + swapcaps |= 0x101; /* ...then set kHasAltivec and kDataStreamsAvailable too */ + commpage_stuff_swap(_COMM_PAGE_CPU_CAPABILITIES, &swapcaps, sizeof(int), legacy); + c2 = 32; + commpage_stuff_swap(_COMM_PAGE_CACHE_LINESIZE,&c2,2,legacy); if (_cpu_capabilities & kCache32) c2 = 32; @@ -354,13 +372,12 @@ commpage_populate( void ) c2 = 128; commpage_stuff(_COMM_PAGE_CACHE_LINESIZE,&c2,2); - c2 = 32; - - commpage_stuff2(_COMM_PAGE_2_TO_52,&two52,8); - - commpage_stuff2(_COMM_PAGE_10_TO_6,&ten6,8); + if ( legacy ) { + commpage_stuff2(_COMM_PAGE_2_TO_52,&two52,8,legacy); + commpage_stuff2(_COMM_PAGE_10_TO_6,&ten6,8,legacy); + } - for( rd = routines; *rd != NULL ; rd++ ) + for( rd = commpage_routines; *rd != NULL ; rd++ ) commpage_stuff_routine(*rd); if (!matched) @@ -369,35 +386,54 @@ commpage_populate( void ) if (next > (uintptr_t)_COMM_PAGE_END) panic("commpage overflow: next = 0x%08x, commPagePtr = 0x%08x", next, (uintptr_t)commPagePtr); + if ( legacy ) { + next = (uintptr_t) NULL; + for( rd = ba_descriptors; *rd != NULL ; rd++ ) + commpage_stuff_routine(*rd); + + next = (uintptr_t) NULL; + commpage_stuff_routine(&sigdata_descriptor); + } - pmap_commpage_init((vm_offset_t) commPagePtr, _COMM_PAGE_BASE_ADDRESS, - _COMM_PAGE_AREA_LENGTH/INTEL_PGBYTES); + /* salt away a ptr to the system integrity data in this commpage */ + dsmos_blobs[dsmos_blob_count++] = + commpage_addr_of( _COMM_PAGE_SYSTEM_INTEGRITY ); } -/* - * This macro prevents compiler instruction scheduling: - */ -#define NO_REORDERING asm volatile("" : : : "memory") + +/* Fill in commpages: called once, during kernel initialization, from the + * startup thread before user-mode code is running. + * + * See the top of this file for a list of what you have to do to add + * a new routine to the commpage. + */ void -commpage_set_nanotime(commpage_nanotime_t *newp) +commpage_populate( void ) { - commpage_nanotime_t *cnp; - - /* Nop if commpage not set up yet */ - if (commPagePtr == NULL) - return; - - cnp = (commpage_nanotime_t *)commpage_addr_of(_COMM_PAGE_NANOTIME_INFO); + commpage_init_cpu_capabilities(); + + commpage_populate_one( com_region_map32, + &commPagePtr32, + _COMM_PAGE32_AREA_USED, + _COMM_PAGE32_BASE_ADDRESS, + commpage_32_routines, + TRUE, /* legacy (32-bit) commpage */ + "commpage 32-bit"); + pmap_commpage32_init((vm_offset_t) commPagePtr32, _COMM_PAGE32_BASE_ADDRESS, + _COMM_PAGE32_AREA_USED/INTEL_PGBYTES); + + if (_cpu_capabilities & k64Bit) { + commpage_populate_one( com_region_map64, + &commPagePtr64, + _COMM_PAGE64_AREA_USED, + _COMM_PAGE32_START_ADDRESS, /* because kernel is built 32-bit */ + commpage_64_routines, + FALSE, /* not a legacy commpage */ + "commpage 64-bit"); + pmap_commpage64_init((vm_offset_t) commPagePtr64, _COMM_PAGE64_BASE_ADDRESS, + _COMM_PAGE64_AREA_USED/INTEL_PGBYTES); + } - /* - * Update in reverse order: - * check_tsc first - it's read and compared with base_tsc last. - */ - cnp->nt_check_tsc = newp->nt_base_tsc; NO_REORDERING; - cnp->nt_shift = newp->nt_shift; NO_REORDERING; - cnp->nt_scale = newp->nt_scale; NO_REORDERING; - cnp->nt_base_ns = newp->nt_base_ns; NO_REORDERING; - cnp->nt_base_tsc = newp->nt_base_tsc; + rtc_nanotime_init_commpage(); } -