+
+extern void *gPEEFIRuntimeServices;
+extern void *gPEEFISystemTable;
+
+/*-
+ * COPYRIGHT (C) 1986 Gary S. Brown. You may use this program, or
+ * code or tables extracted from it, as desired without restriction.
+ *
+ * First, the polynomial itself and its table of feedback terms. The
+ * polynomial is
+ * X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0
+ *
+ * Note that we take it "backwards" and put the highest-order term in
+ * the lowest-order bit. The X^32 term is "implied"; the LSB is the
+ * X^31 term, etc. The X^0 term (usually shown as "+1") results in
+ * the MSB being 1
+ *
+ * Note that the usual hardware shift register implementation, which
+ * is what we're using (we're merely optimizing it by doing eight-bit
+ * chunks at a time) shifts bits into the lowest-order term. In our
+ * implementation, that means shifting towards the right. Why do we
+ * do it this way? Because the calculated CRC must be transmitted in
+ * order from highest-order term to lowest-order term. UARTs transmit
+ * characters in order from LSB to MSB. By storing the CRC this way
+ * we hand it to the UART in the order low-byte to high-byte; the UART
+ * sends each low-bit to hight-bit; and the result is transmission bit
+ * by bit from highest- to lowest-order term without requiring any bit
+ * shuffling on our part. Reception works similarly
+ *
+ * The feedback terms table consists of 256, 32-bit entries. Notes
+ *
+ * The table can be generated at runtime if desired; code to do so
+ * is shown later. It might not be obvious, but the feedback
+ * terms simply represent the results of eight shift/xor opera
+ * tions for all combinations of data and CRC register values
+ *
+ * The values must be right-shifted by eight bits by the "updcrc
+ * logic; the shift must be unsigned (bring in zeroes). On some
+ * hardware you could probably optimize the shift in assembler by
+ * using byte-swap instructions
+ * polynomial $edb88320
+ *
+ *
+ * CRC32 code derived from work by Gary S. Brown.
+ */
+
+static uint32_t crc32_tab[] = {
+ 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
+ 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
+ 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
+ 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
+ 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
+ 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
+ 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
+ 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
+ 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
+ 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
+ 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
+ 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
+ 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
+ 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
+ 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
+ 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
+ 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
+ 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
+ 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
+ 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+ 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
+ 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
+ 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
+ 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
+ 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
+ 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
+ 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
+ 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
+ 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
+ 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
+ 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
+ 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
+ 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
+ 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
+ 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
+ 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
+ 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
+ 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
+ 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
+ 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+ 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
+ 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
+ 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
+};
+
+static uint32_t
+crc32(uint32_t crc, const void *buf, size_t size)
+{
+ const uint8_t *p;
+
+ p = buf;
+ crc = crc ^ ~0U;
+
+ while (size--)
+ crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
+
+ return crc ^ ~0U;
+}
+
+static void
+efi_set_tables_64(EFI_SYSTEM_TABLE_64 * system_table)
+{
+ EFI_RUNTIME_SERVICES_64 *runtime;
+ uint32_t hdr_cksum;
+ uint32_t cksum;
+
+ kprintf("Processing 64-bit EFI tables at %p\n", system_table);
+ do {
+ if (system_table->Hdr.Signature != EFI_SYSTEM_TABLE_SIGNATURE) {
+ kprintf("Bad EFI system table signature\n");
+ break;
+ }
+ // Verify signature of the system table
+ hdr_cksum = system_table->Hdr.CRC32;
+ system_table->Hdr.CRC32 = 0;
+ cksum = crc32(0L, system_table, system_table->Hdr.HeaderSize);
+
+ //kprintf("System table calculated CRC32 = 0x%x, header = 0x%x\n", cksum, hdr_cksum);
+ system_table->Hdr.CRC32 = hdr_cksum;
+ if (cksum != hdr_cksum) {
+ kprintf("Bad EFI system table checksum\n");
+ break;
+ }
+
+ gPEEFISystemTable = system_table;
+
+ kprintf("RuntimeServices table at 0x%qx\n", system_table->RuntimeServices);
+ runtime = (EFI_RUNTIME_SERVICES_64 *) (uintptr_t)system_table->RuntimeServices; // XXX
+ kprintf("Checking runtime services table %p\n", runtime);
+ if (runtime->Hdr.Signature != EFI_RUNTIME_SERVICES_SIGNATURE) {
+ kprintf("Bad EFI runtime table signature\n");
+ break;
+ }
+
+ // Verify signature of runtime services table
+ hdr_cksum = runtime->Hdr.CRC32;
+ runtime->Hdr.CRC32 = 0;
+ cksum = crc32(0L, runtime, runtime->Hdr.HeaderSize);
+
+ //kprintf("Runtime table calculated CRC32 = 0x%x, header = 0x%x\n", cksum, hdr_cksum);
+ runtime->Hdr.CRC32 = hdr_cksum;
+ if (cksum != hdr_cksum) {
+ kprintf("Bad EFI runtime table checksum\n");
+ break;
+ }
+
+ gPEEFIRuntimeServices = runtime;
+ }
+ while (FALSE);
+}
+
+static void
+efi_set_tables_32(EFI_SYSTEM_TABLE * system_table)
+{
+ EFI_RUNTIME_SERVICES *runtime;
+ uint32_t hdr_cksum;
+ uint32_t cksum;
+
+ kprintf("Processing 32-bit EFI tables at %p\n", system_table);
+ do {
+ if (system_table->Hdr.Signature != EFI_SYSTEM_TABLE_SIGNATURE) {
+ kprintf("Bad EFI system table signature\n");
+ break;
+ }
+ // Verify signature of the system table
+ hdr_cksum = system_table->Hdr.CRC32;
+ system_table->Hdr.CRC32 = 0;
+ cksum = crc32(0L, system_table, system_table->Hdr.HeaderSize);
+
+ //kprintf("System table calculated CRC32 = 0x%x, header = 0x%x\n", cksum, hdr_cksum);
+ system_table->Hdr.CRC32 = hdr_cksum;
+ if (cksum != hdr_cksum) {
+ kprintf("Bad EFI system table checksum\n");
+ break;
+ }
+
+ gPEEFISystemTable = system_table;
+
+ kprintf("RuntimeServices table at %p\n", system_table->RuntimeServices);
+ runtime = (EFI_RUNTIME_SERVICES *) system_table->RuntimeServices;
+ if (runtime->Hdr.Signature != EFI_RUNTIME_SERVICES_SIGNATURE) {
+ kprintf("Bad EFI runtime table signature\n");
+ break;
+ }
+
+ // Verify signature of runtime services table
+ hdr_cksum = runtime->Hdr.CRC32;
+ runtime->Hdr.CRC32 = 0;
+ cksum = crc32(0L, runtime, runtime->Hdr.HeaderSize);
+
+ //kprintf("Runtime table calculated CRC32 = 0x%x, header = 0x%x\n", cksum, hdr_cksum);
+ runtime->Hdr.CRC32 = hdr_cksum;
+ if (cksum != hdr_cksum) {
+ kprintf("Bad EFI runtime table checksum\n");
+ break;
+ }
+
+ gPEEFIRuntimeServices = runtime;
+ }
+ while (FALSE);
+}
+
+
+/* Map in EFI runtime areas. */
+static void
+efi_init(void)
+{
+ boot_args *args = (boot_args *)PE_state.bootArgs;
+
+ kprintf("Initializing EFI runtime services\n");
+
+ do
+ {
+ vm_offset_t vm_size, vm_addr;
+ vm_map_offset_t phys_addr;
+ EfiMemoryRange *mptr;
+ unsigned int msize, mcount;
+ unsigned int i;
+
+ msize = args->MemoryMapDescriptorSize;
+ mcount = args->MemoryMapSize / msize;
+
+ mptr = (EfiMemoryRange *)args->MemoryMap;
+ for (i=0; i < mcount; i++, mptr = (EfiMemoryRange *)(((vm_offset_t)mptr) + msize)) {
+ if (((mptr->Attribute & EFI_MEMORY_RUNTIME) == EFI_MEMORY_RUNTIME) ) {
+ vm_size = i386_ptob((uint32_t)mptr->NumberOfPages);
+ vm_addr = (vm_offset_t) mptr->VirtualStart;
+ phys_addr = (vm_map_offset_t) mptr->PhysicalStart;
+ pmap_map(vm_addr, phys_addr, phys_addr + round_page(vm_size),
+ (mptr->Type == kEfiRuntimeServicesCode) ? VM_PROT_READ | VM_PROT_EXECUTE : VM_PROT_READ|VM_PROT_WRITE,
+ (mptr->Type == EfiMemoryMappedIO) ? VM_WIMG_IO : VM_WIMG_USE_DEFAULT);
+ }
+ }
+
+ if (args->Version > 1)
+ panic("Incompatible boot args version %d\n", args->Version);
+
+ kprintf("Boot args version %d revision %d mode %d\n", args->Version, args->Revision, args->efiMode);
+ if (args->Revision >= 4 && args->efiMode == kBootArgsEfiMode64) {
+ efi_set_tables_64((EFI_SYSTEM_TABLE_64 *) args->efiSystemTable);
+ } else {
+ efi_set_tables_32((EFI_SYSTEM_TABLE *) args->efiSystemTable);
+ }
+ }
+ while (FALSE);
+
+ return;
+}
+
+/* Remap EFI runtime areas. */
+void
+hibernate_newruntime_map(void * map, vm_size_t map_size, uint32_t system_table_offset)
+{
+ boot_args *args = (boot_args *)PE_state.bootArgs;
+
+ kprintf("Reinitializing EFI runtime services\n");
+
+ if (args->Revision < 3)
+ return;
+ do
+ {
+ vm_offset_t vm_size, vm_addr;
+ vm_map_offset_t phys_addr;
+ EfiMemoryRange *mptr;
+ unsigned int msize, mcount;
+ unsigned int i;
+
+ gPEEFISystemTable = 0;
+ gPEEFIRuntimeServices = 0;
+
+ system_table_offset += ptoa_32(args->efiRuntimeServicesPageStart);
+
+ kprintf("Old system table 0x%x, new 0x%x\n",
+ (uint32_t)args->efiSystemTable, system_table_offset);
+
+ args->efiSystemTable = system_table_offset;
+
+ kprintf("Old map:\n");
+ msize = args->MemoryMapDescriptorSize;
+ mcount = args->MemoryMapSize / msize;
+ mptr = (EfiMemoryRange *)args->MemoryMap;
+ for (i=0; i < mcount; i++, mptr = (EfiMemoryRange *)(((vm_offset_t)mptr) + msize)) {
+ if ((mptr->Attribute & EFI_MEMORY_RUNTIME) == EFI_MEMORY_RUNTIME) {
+
+ vm_size = i386_ptob((uint32_t)mptr->NumberOfPages);
+ vm_addr = (vm_offset_t) mptr->VirtualStart;
+ phys_addr = (vm_map_offset_t) mptr->PhysicalStart;
+
+ kprintf("mapping[%u] %qx @ %x, %llu\n", mptr->Type, phys_addr, vm_addr, mptr->NumberOfPages);
+ }
+ }
+
+ pmap_remove(kernel_pmap, i386_ptob(args->efiRuntimeServicesPageStart),
+ i386_ptob(args->efiRuntimeServicesPageStart + args->efiRuntimeServicesPageCount));
+
+ kprintf("New map:\n");
+ msize = args->MemoryMapDescriptorSize;
+ mcount = map_size / msize;
+ mptr = map;
+ for (i=0; i < mcount; i++, mptr = (EfiMemoryRange *)(((vm_offset_t)mptr) + msize)) {
+ if ((mptr->Attribute & EFI_MEMORY_RUNTIME) == EFI_MEMORY_RUNTIME) {
+
+ vm_size = i386_ptob((uint32_t)mptr->NumberOfPages);
+ vm_addr = (vm_offset_t) mptr->VirtualStart;
+ phys_addr = (vm_map_offset_t) mptr->PhysicalStart;
+
+ kprintf("mapping[%u] %qx @ %x, %llu\n", mptr->Type, phys_addr, vm_addr, mptr->NumberOfPages);
+
+ pmap_map(vm_addr, phys_addr, phys_addr + round_page(vm_size),
+ (mptr->Type == kEfiRuntimeServicesCode) ? VM_PROT_READ | VM_PROT_EXECUTE : VM_PROT_READ|VM_PROT_WRITE,
+ (mptr->Type == EfiMemoryMappedIO) ? VM_WIMG_IO : VM_WIMG_USE_DEFAULT);
+ }
+ }
+
+ if (args->Version > 1)
+ panic("Incompatible boot args version %d\n", args->Version);
+
+ kprintf("Boot args version %d revision %d mode %d\n", args->Version, args->Revision, args->efiMode);
+ if (args->Revision >= 4 && args->efiMode == kBootArgsEfiMode64) {
+ efi_set_tables_64((EFI_SYSTEM_TABLE_64 *) args->efiSystemTable);
+ } else {
+ efi_set_tables_32((EFI_SYSTEM_TABLE *) args->efiSystemTable);
+ }
+ }
+ while (FALSE);
+
+ kprintf("Done reinitializing EFI runtime services\n");
+
+ return;
+}
+
projects / apple / xnu.git / blobdiff