Add structs for TPM NV simplification

firmware/lib/tpm_lite/tlcl.c

 /* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /* A lightweight TPM command library.
  *
  * The general idea is that TPM commands are array of bytes whose
  * fields are mostly compile-time constant.  The goal is to build much
  * of the commands at compile time (or build time) and change some of
@@ skipping 103 matching lines @@
 uint32_t TlclDefineSpace(uint32_t index, uint32_t perm, uint32_t size) {
   struct s_tpm_nv_definespace_cmd cmd;
   VBDEBUG(("TPM: TlclDefineSpace(0x%x, 0x%x, %d)\n", index, perm, size));
   Memcpy(&cmd, &tpm_nv_definespace_cmd, sizeof(cmd));
   ToTpmUint32(cmd.buffer + tpm_nv_definespace_cmd.index, index);
   ToTpmUint32(cmd.buffer + tpm_nv_definespace_cmd.perm, perm);
   ToTpmUint32(cmd.buffer + tpm_nv_definespace_cmd.size, size);
   return Send(cmd.buffer);
 }
 
-uint32_t TlclWrite(uint32_t index, uint8_t* data, uint32_t length) {
+uint32_t TlclWrite(uint32_t index, const void* data, uint32_t length) {
   struct s_tpm_nv_write_cmd cmd;
   uint8_t response[TPM_LARGE_ENOUGH_COMMAND_SIZE];
   const int total_length =
     kTpmRequestHeaderLength + kWriteInfoLength + length;
 
   VBDEBUG(("TPM: TlclWrite(0x%x, %d)\n", index, length));
   Memcpy(&cmd, &tpm_nv_write_cmd, sizeof(cmd));
   assert(total_length <= TPM_LARGE_ENOUGH_COMMAND_SIZE);
   SetTpmCommandSize(cmd.buffer, total_length);
 
   ToTpmUint32(cmd.buffer + tpm_nv_write_cmd.index, index);
   ToTpmUint32(cmd.buffer + tpm_nv_write_cmd.length, length);
   Memcpy(cmd.buffer + tpm_nv_write_cmd.data, data, length);
 
   return TlclSendReceive(cmd.buffer, response, sizeof(response));
 }
 
-uint32_t TlclRead(uint32_t index, uint8_t* data, uint32_t length) {
+uint32_t TlclRead(uint32_t index, void* data, uint32_t length) {
   struct s_tpm_nv_read_cmd cmd;
   uint8_t response[TPM_LARGE_ENOUGH_COMMAND_SIZE];
   uint32_t result_length;
   uint32_t result;
 
   VBDEBUG(("TPM: TlclRead(0x%x, %d)\n", index, length));
   Memcpy(&cmd, &tpm_nv_read_cmd, sizeof(cmd));
   ToTpmUint32(cmd.buffer + tpm_nv_read_cmd.index, index);
   ToTpmUint32(cmd.buffer + tpm_nv_read_cmd.length, length);
 
@@ skipping 127 matching lines @@
   Memcpy(&cmd, &tpm_getpermissions_cmd, sizeof(cmd));
   ToTpmUint32(cmd.buffer + tpm_getpermissions_cmd.index, index);
   result = TlclSendReceive(cmd.buffer, response, sizeof(response));
   if (result != TPM_SUCCESS)
     return result;
 
   nvdata = response + kTpmResponseHeaderLength + sizeof(size);
   FromTpmUint32(nvdata + kNvDataPublicPermissionsOffset, permissions);
   return result;
 }