diff options
Diffstat (limited to 'rom_access_library/library/rom/src/ss_sm_ram_access.cpp')
| -rw-r--r-- | rom_access_library/library/rom/src/ss_sm_ram_access.cpp | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/rom_access_library/library/rom/src/ss_sm_ram_access.cpp b/rom_access_library/library/rom/src/ss_sm_ram_access.cpp new file mode 100644 index 00000000..f101fb4b --- /dev/null +++ b/rom_access_library/library/rom/src/ss_sm_ram_access.cpp @@ -0,0 +1,215 @@ +/* + * @copyright Copyright (c) 2016-2019 TOYOTA MOTOR CORPORATION. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "system_service/ss_sm_ram_access.h" +#include <stdio.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <native_service/cl_lock.h> +#include <native_service/cl_lockid.h> +//#include <stub/el_mem.h> +#include "system_service/ss_sm_boot_access.h" +#include "ss_rom_access_if_romaccesslibrarylog.h" +#include "ss_sm_checksum.h" +#include "ss_rom_access_define.h" + + + +#define RAM_PATH "/nv/romaccess/ramdata.dat" +#define RAM_OLD_PATH RAM_PATH".old" +static const uint8_t kSigNature[] = { 0xDE, 0xAD, 0xBE, 0xEF }; +static const uint8_t kMagic[] = { 0xDE, 0xAD, 0xBE, 0xEF }; + +void* RAM_AccessIf::g_m_plock = NULL; +void* RAM_AccessIf::g_m_bakup_map = MAP_FAILED; +bool RAM_AccessIf::g_m_is_first_access = false; + +typedef struct { + char magic_in[4]; + RAM_SM_INFO_t data0; + uint32_t checksum0; + RAM_SM_INFO_t data1; + uint32_t checksum1; + char magic_out[4]; +} RAM_SM_DRAM_INFO_t; + +void RAM_AccessIf::initRamBackupEnable(RAM_WAKEUP_STATE wupState) { + RAM_SM_DRAM_INFO_t* p_buf; + CSMChecksum l_checksum; + + ROM_ACCESS_STATIC_ASERT(sizeof(RAM_SM_DRAM_INFO_t) <= SS_SYS_AREA_RAM_MAX_SIZE); + // Checking sizes because checksum calculations expect 4 bytes alignments + ROM_ACCESS_STATIC_ASERT((sizeof(RAM_SM_DRAM_INFO_t) % sizeof(UI_32)) == 0); + + if (g_m_bakup_map == MAP_FAILED) { +// g_m_bakup_map = EL_mem_exram_mmap( // LCOV_EXCL_BR_LINE 11:unexpected branch +// EL_MEM_TYPE_REGION_SYS, +// EL_mem_getOffset(EL_MEM_ID_SYS_BOOT) + SS_SYS_AREA_RAM_OFFSET, // LCOV_EXCL_BR_LINE 11:unexpected branch +// SS_SYS_AREA_RAM_MAX_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, +// EL_MEM_CACHE_INVALID); + // LCOV_EXCL_BR_START 6:impossible to confirm because g_m_bakup_map can not be changed + if (g_m_bakup_map == MAP_FAILED) { + // LCOV_EXCL_BR_STOP + AGL_ASSERT_NOT_TESTED(); // LCOV_EXCL_LINE 200: test assert + ROM_ACCESS_ERRNO(0); // LCOV_EXCL_LINE 6:impossible to confirm because g_m_bakup_map can not be changed + return; // LCOV_EXCL_LINE 6:impossible to confirm because g_m_bakup_map can not be changed + } + } + p_buf = static_cast<RAM_SM_DRAM_INFO_t*>(g_m_bakup_map); + + // LCOV_EXCL_BR_START 6:impossible to confirm because wupState can not be changed + if ((RAM_WAKEUP_STATE_BACKUP_NG == wupState) || + (RAM_WAKEUP_STATE_BATTERY_DOWN == wupState) || + (memcmp(p_buf->magic_out, kMagic, sizeof(kMagic)) != 0) || + (memcmp(p_buf->magic_in, p_buf->magic_out, sizeof(p_buf->magic_in)) != 0)) { + // LCOV_EXCL_BR_STOP + // BACKUP NG + g_m_is_first_access = false; + bzero(p_buf, sizeof(RAM_SM_DRAM_INFO_t)); + } + + if (!g_m_is_first_access) { + // LCOV_EXCL_BR_START 11:unexpected branch + if ((memcmp(p_buf->data0.signature_in, kSigNature, sizeof(kSigNature)) == 0) + && (memcmp(p_buf->data0.signature_out, kSigNature, + sizeof(kSigNature)) == 0) + && (l_checksum.cal_checksum(&(p_buf->data0), sizeof(p_buf->data0)) == p_buf->checksum0)) { + // LCOV_EXCL_BR_STOP + // Use data0 content + memcpy(&(p_buf->data1), &(p_buf->data0), sizeof(p_buf->data1)); + p_buf->checksum1 = p_buf->checksum0; + // LCOV_EXCL_BR_START 11:unexpected branch + } else if ((memcmp(p_buf->data1.signature_in, kSigNature, sizeof(kSigNature)) == 0) + && (memcmp(p_buf->data1.signature_out, kSigNature, + sizeof(kSigNature)) == 0) + && (l_checksum.cal_checksum(&(p_buf->data1), sizeof(p_buf->data1)) == p_buf->checksum1)) { + // LCOV_EXCL_BR_STOP + // Use data1 content + memcpy(&(p_buf->data0), &(p_buf->data1), sizeof(p_buf->data0)); + p_buf->checksum0 = p_buf->checksum1; + } else { + // BACKUP NG or SIGNATURE CHECK or CHECK SUM NG + bzero(p_buf, sizeof(RAM_SM_DRAM_INFO_t)); + memcpy(p_buf->magic_in, kMagic, sizeof(kMagic)); + // data0 + memcpy(p_buf->data0.signature_in, kSigNature, sizeof(kSigNature)); + memcpy(p_buf->data0.signature_out, kSigNature, sizeof(kSigNature)); + p_buf->checksum0 = + l_checksum.cal_checksum(&(p_buf->data0), sizeof(p_buf->data0)); // LCOV_EXCL_BR_LINE 11:unexpected branch + // data1 + memcpy(p_buf->data1.signature_in, kSigNature, sizeof(kSigNature)); + memcpy(p_buf->data1.signature_out, kSigNature, sizeof(kSigNature)); + p_buf->checksum1 = + l_checksum.cal_checksum(&(p_buf->data1), sizeof(p_buf->data1)); // LCOV_EXCL_BR_LINE 11:unexpected branch + memcpy(p_buf->magic_out, kMagic, sizeof(kMagic)); + } + } + memcpy(&m_buf, &(p_buf->data0), sizeof(p_buf->data0)); +} + +void RAM_AccessIf::finalRamBackupEnable(void) { + RAM_SM_DRAM_INFO_t* p_buf; + CSMChecksum l_checksum; + // LCOV_EXCL_BR_START 6:impossible to confirm because g_m_bakup_map can not be changed + if (g_m_bakup_map == MAP_FAILED) { + // LCOV_EXCL_BR_STOP + AGL_ASSERT_NOT_TESTED(); // LCOV_EXCL_LINE 200: test assert + ROM_ACCESS_ASERT(0); // LCOV_EXCL_LINE 6:impossible to confirm because g_m_bakup_map can not be changed + return; // LCOV_EXCL_LINE 6:impossible to confirm because g_m_bakup_map can not be changed + } + + p_buf = static_cast<RAM_SM_DRAM_INFO_t*>(g_m_bakup_map); + + // kSigNature is cleared during writing + bzero(m_buf.signature_in, sizeof(kSigNature)); + + // data0 + memcpy(&(p_buf->data0), &m_buf, sizeof(p_buf->data0)); + memcpy(p_buf->data0.signature_in, kSigNature, sizeof(kSigNature)); + p_buf->checksum0 = l_checksum.cal_checksum(&(p_buf->data0), // LCOV_EXCL_BR_LINE 11:unexpected branch + sizeof(p_buf->data0)); + + // data1 + memcpy(&(p_buf->data1), &m_buf, sizeof(p_buf->data1)); + memcpy(p_buf->data1.signature_in, kSigNature, sizeof(kSigNature)); + p_buf->checksum1 = l_checksum.cal_checksum(&(p_buf->data1), // LCOV_EXCL_BR_LINE 11:unexpected branch + sizeof(p_buf->data1)); + + // Set kSigNature + memcpy(m_buf.signature_in, kSigNature, + sizeof(kSigNature)); +} + +RAM_AccessIf::RAM_AccessIf( + RAM_WAKEUP_STATE wupState /* = RAM_WAKEUP_STATE_DONT_CARE */) + : m_buf(), + m_dirty(false) { + + if (g_m_plock == NULL) { // LCOV_EXCL_BR_LINE 6:impossible to confirm because g_m_plock can not be changed + g_m_plock = CL_LockMap(LOCK_RAM_ACCESS_IF); + if (g_m_plock == MAP_FAILED) { + ROM_ACCESS_ASERT(0); // LCOV_EXCL_BR_LINE 6:impossible to confirm because g_m_plock can not be changed + // LCOV_EXCL_BR_START 6:impossible to confirm because g_m_plock can not be changed + FRAMEWORKUNIFIEDLOG( + ZONE_ERR, __FUNCTION__, + "CL_LockMap Error, please check whether you call CL_LockProcessInit"); + // LCOV_EXCL_BR_STOP + g_m_plock = NULL; + } + } + if (g_m_plock) { + if (0 != CL_LockGet(g_m_plock)) { + ROM_ACCESS_ASERT(0); + } + } + + if (RAM_WAKEUP_STATE_BATTERY_DOWN == wupState) { // LCOV_EXCL_BR_LINE 13: + // Models without DRAM backups are initialized when +B is down. + // Deletes files because models with DRAM backups are also backwards compatible + AGL_ASSERT_NOT_TESTED(); // LCOV_EXCL_LINE 200: test assert + unlink(RAM_PATH); // LCOV_EXCL_LINE 13: + unlink(RAM_OLD_PATH); // LCOV_EXCL_LINE 13: + } + + initRamBackupEnable(wupState); + g_m_is_first_access = true; +} + +RAM_AccessIf::~RAM_AccessIf() { + if (m_dirty) { + finalRamBackupEnable(); + } + if (g_m_plock) { + ROM_ACCESS_ASERT(0 == CL_LockRelease(g_m_plock)); + } + + return; +} + +EFrameworkunifiedStatus RAM_AccessIf::getRamInfo(RAM_SM_INFO_t* p_bootInfo) { + *p_bootInfo = m_buf; + return eFrameworkunifiedStatusOK; +} + +EFrameworkunifiedStatus RAM_AccessIf::setRamInfo(RAM_SM_INFO_t* p_bootInfo) { + if (0 != memcmp(&m_buf, p_bootInfo, sizeof(m_buf))) { // LCOV_EXCL_BR_LINE 11:unexpected branch + m_buf = *p_bootInfo; + m_dirty = true; + } + + return eFrameworkunifiedStatusOK; +} |