diff options
Diffstat (limited to 'chip/host/system.c')
| -rw-r--r-- | chip/host/system.c | 282 |
1 files changed, 0 insertions, 282 deletions
diff --git a/chip/host/system.c b/chip/host/system.c deleted file mode 100644 index 60d765deab..0000000000 --- a/chip/host/system.c +++ /dev/null @@ -1,282 +0,0 @@ -/* Copyright 2013 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. - */ - -/* System module for emulator */ - -#include "common.h" -#include "ec_commands.h" -#include "host_test.h" -#include "panic.h" -#include "persistence.h" -#include "reboot.h" -#include "system.h" -#include "timer.h" -#include "util.h" - -// Forward declaration from <stdlib.h> to avoid declaration conflicts. -void exit(int); - -#define SHARED_MEM_SIZE 0x2000 /* bytes */ -#define RAM_DATA_SIZE (sizeof(struct panic_data) + 512) /* bytes */ -uint8_t __shared_mem_buf[SHARED_MEM_SIZE + RAM_DATA_SIZE]; - -static char *__ram_data = __shared_mem_buf + SHARED_MEM_SIZE; - -static enum ec_image __running_copy; - -static void ramdata_set_persistent(void) -{ - FILE *f = get_persistent_storage("ramdata", "wb"); - int sz; - - ASSERT(f != NULL); - - sz = fwrite(__ram_data, RAM_DATA_SIZE, 1, f); - ASSERT(sz == 1); - - release_persistent_storage(f); -} - -static void ramdata_get_persistent(void) -{ - FILE *f = get_persistent_storage("ramdata", "rb"); - - if ((f == NULL) || (fread(__ram_data, RAM_DATA_SIZE, 1, f) != 1)) { - fprintf(stderr, - "No RAM data found. Initializing to 0x00.\n"); - memset(__ram_data, 0, RAM_DATA_SIZE); - return; - } - - release_persistent_storage(f); - - /* - * Assumes RAM data doesn't preserve across reboot except for sysjump. - * Clear persistent data once it's read. - */ - remove_persistent_storage("ramdata"); -} - -static void set_image_copy(uint32_t copy) -{ - FILE *f = get_persistent_storage("image_copy", "wb"); - - ASSERT(f != NULL); - ASSERT(fwrite(©, sizeof(copy), 1, f) == 1); - - release_persistent_storage(f); -} - -static uint32_t get_image_copy(void) -{ - FILE *f = get_persistent_storage("image_copy", "rb"); - uint32_t ret; - - if ((f == NULL) || (fread(&ret, sizeof(ret), 1, f) != 1)) - return EC_IMAGE_UNKNOWN; - release_persistent_storage(f); - remove_persistent_storage("image_copy"); - - return ret; -} - -static void save_reset_flags(uint32_t flags) -{ - FILE *f = get_persistent_storage("reset_flags", "wb"); - - ASSERT(f != NULL); - ASSERT(fwrite(&flags, sizeof(flags), 1, f) == 1); - - release_persistent_storage(f); -} - -static uint32_t load_reset_flags(void) -{ - FILE *f = get_persistent_storage("reset_flags", "rb"); - uint32_t ret; - - if ((f == NULL) || (fread(&ret, sizeof(ret), 1, f) != 1)) - return EC_RESET_FLAG_POWER_ON; - release_persistent_storage(f); - remove_persistent_storage("reset_flags"); - - return ret; -} - -static void save_time(timestamp_t t) -{ - FILE *f = get_persistent_storage("time", "wb"); - - ASSERT(f != NULL); - ASSERT(fwrite(&t, sizeof(t), 1, f) == 1); - - release_persistent_storage(f); -} - -static int load_time(timestamp_t *t) -{ - FILE *f = get_persistent_storage("time", "rb"); - - if ((f == NULL) || (fread(t, sizeof(*t), 1, f) != 1)) - return 0; - release_persistent_storage(f); - remove_persistent_storage("time"); - - return 1; -} - -test_mockable struct panic_data *panic_get_data(void) -{ - return (struct panic_data *) - (__ram_data + RAM_DATA_SIZE - sizeof(struct panic_data)); -} - -test_mockable uintptr_t get_panic_data_start() -{ - return (uintptr_t) - (__ram_data + RAM_DATA_SIZE - sizeof(struct panic_data)); -} - -test_mockable void system_reset(int flags) -{ - uint32_t save_flags = 0; - if (flags & SYSTEM_RESET_PRESERVE_FLAGS) - save_flags = system_get_reset_flags() | EC_RESET_FLAG_PRESERVED; - if (flags & SYSTEM_RESET_LEAVE_AP_OFF) - save_flags |= EC_RESET_FLAG_AP_OFF; - if (flags & SYSTEM_RESET_HARD) - save_flags |= EC_RESET_FLAG_HARD; - if (save_flags) - save_reset_flags(save_flags); - emulator_reboot(); -} - -test_mockable void system_hibernate(uint32_t seconds, uint32_t microseconds) -{ - uint32_t i; - - if (board_hibernate) - board_hibernate(); - - save_reset_flags(EC_RESET_FLAG_HIBERNATE); - - if (!seconds && !microseconds) - exit(EXIT_CODE_HIBERNATE); - - for (i = 0; i < seconds; ++i) - udelay(SECOND); - udelay(microseconds); - emulator_reboot(); -} - -test_mockable int system_is_locked(void) -{ - return 0; -} - -#ifdef TEST_FUZZ -/* When fuzzing, do not allow sysjumps. */ -int system_run_image_copy(enum ec_image copy) -{ - ccprints("Emulator would sysjump here. Fuzzing: doing nothing."); - return EC_ERROR_UNKNOWN; -} -#endif - -const char *system_get_chip_vendor(void) -{ - return "chromeos"; -} - -const char *system_get_chip_name(void) -{ - return "emu"; -} - -const char *system_get_chip_revision(void) -{ - return ""; -} - -int system_get_bbram(enum system_bbram_idx idx, uint8_t *value) -{ - return EC_ERROR_UNIMPLEMENTED; -} - -int system_set_bbram(enum system_bbram_idx idx, uint8_t value) -{ - return EC_ERROR_UNIMPLEMENTED; -} - -enum ec_image system_get_image_copy(void) -{ - return __running_copy; -} - -int system_set_scratchpad(uint32_t value) -{ - FILE *f = get_persistent_storage("scratchpad", "w"); - - fprintf(f, "%u", value); - release_persistent_storage(f); - - return EC_SUCCESS; -} - -int system_get_scratchpad(uint32_t *value) -{ - FILE *f = get_persistent_storage("scratchpad", "r"); - int success; - - if (f == NULL) - return EC_ERROR_UNKNOWN; - - success = fscanf(f, "%u", value); - release_persistent_storage(f); - - if (success) - return EC_SUCCESS; - else - return EC_ERROR_UNKNOWN; -} - -static void __jump_resetvec(void) -{ - save_time(get_time()); - ramdata_set_persistent(); - emulator_reboot(); -} - -static void __ro_jump_resetvec(void) -{ - set_image_copy(EC_IMAGE_RO); - __jump_resetvec(); -} - -static void __rw_jump_resetvec(void) -{ - set_image_copy(EC_IMAGE_RW); - __jump_resetvec(); -} - -void system_pre_init(void) -{ - timestamp_t t; - - if (load_time(&t)) - force_time(t); - - ramdata_get_persistent(); - __running_copy = get_image_copy(); - if (__running_copy == EC_IMAGE_UNKNOWN) { - __running_copy = EC_IMAGE_RO; - system_set_reset_flags(load_reset_flags()); - } - - *(uintptr_t *)(__host_flash + CONFIG_RO_MEM_OFF + 4) = - (uintptr_t)__ro_jump_resetvec; - *(uintptr_t *)(__host_flash + CONFIG_RW_MEM_OFF + 4) = - (uintptr_t)__rw_jump_resetvec; -} |