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Diffstat (limited to '')
| -rw-r--r-- | plat/imx/imx8m/imx_hab.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/plat/imx/imx8m/imx_hab.c b/plat/imx/imx8m/imx_hab.c new file mode 100644 index 0000000..222046f --- /dev/null +++ b/plat/imx/imx8m/imx_hab.c @@ -0,0 +1,124 @@ +/* + * Copyright 2017-2020 NXP + * Copyright 2022 Leica Geosystems AG + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <common/runtime_svc.h> +#include <imx_sip_svc.h> + +#define HAB_CID_ATF U(2) /* TF-A Caller ID */ + +/* HAB Status definitions */ +enum hab_status { + HAB_STS_ANY = 0x00, /* Match any status in report_event() */ + HAB_FAILURE = 0x33, /* Operation failed */ + HAB_WARNING = 0x69, /* Operation completed with warning */ + HAB_SUCCESS = 0xf0 /* Operation completed successfully */ +}; + +/* HAB Configuration definitions */ +enum hab_config { + HAB_CFG_RETURN = 0x33, /* Field Return IC */ + HAB_CFG_OPEN = 0xf0, /* Non-secure IC */ + HAB_CFG_CLOSED = 0xcc /* Secure IC */ +}; + +/* HAB State definitions */ +enum hab_state { + HAB_STATE_INITIAL = 0x33, /* Initializing state (transitory) */ + HAB_STATE_CHECK = 0x55, /* Check state (non-secure) */ + HAB_STATE_NONSECURE = 0x66, /* Non-secure state */ + HAB_STATE_TRUSTED = 0x99, /* Trusted state */ + HAB_STATE_SECURE = 0xaa, /* Secure state */ + HAB_STATE_FAIL_SOFT = 0xcc, /* Soft fail state */ + HAB_STATE_FAIL_HARD = 0xff, /* Hard fail state (terminal) */ + HAB_STATE_NONE = 0xf0 /* No security state machine */ +}; + +/* HAB Verification Target definitions */ +enum hab_target { + HAB_TGT_MEMORY = 0x0f, /* Check memory allowed list */ + HAB_TGT_PERIPHERAL = 0xf0, /* Check peripheral allowed list */ + HAB_TGT_ANY = 0x55 /* Check memory & peripheral allowed list */ +}; + +/* Authenticate Image Loader Callback prototype */ +typedef enum hab_status hab_loader_callback_f_t(void **, size_t *, const void *); + +/* + * HAB Rom VectorTable (RVT) structure. + * This table provides function pointers into the HAB library in ROM for + * use by post-ROM boot sequence components. + * Functions are ordered in the structure below based on the offsets in ROM + * image, and shall not be changed! + * Details on API allocation offsets and function description could be + * found in following documents from NXP: + * - High Assurance Boot Version 4 Application Programming Interface + * Reference Manual (available in CST package) + * - HABv4 RVT Guidelines and Recommendations (AN12263) + */ +struct hab_rvt_api { + uint64_t hdr; + enum hab_status (*entry)(void); + enum hab_status (*exit)(void); + enum hab_status (*check_target)(enum hab_target type, const void *start, size_t bytes); + void* (*authenticate_image)(uint8_t cid, long ivt_offset, void **start, + size_t *bytes, hab_loader_callback_f_t loader); + enum hab_status (*run_dcd)(const uint8_t *dcd); + enum hab_status (*run_csf)(const uint8_t *csf, uint8_t cid, uint32_t srkmask); + enum hab_status (*assert)(long type, const void *data, uint32_t count); + enum hab_status (*report_event)(enum hab_status status, uint32_t index, + uint8_t *event, size_t *bytes); + enum hab_status (*report_status)(enum hab_config *config, enum hab_state *state); + void (*failsafe)(void); + void* (*authenticate_image_no_dcd)(uint8_t cid, long ivt_offset, void **start, + size_t *bytes, hab_loader_callback_f_t loader); + uint32_t (*get_version)(void); + enum hab_status (*authenticate_container)(uint8_t cid, long ivt_offset, void **start, + size_t *bytes, hab_loader_callback_f_t loader, uint32_t srkmask, int skip_dcd); +}; + +struct hab_rvt_api *g_hab_rvt_api = (struct hab_rvt_api *)HAB_RVT_BASE; + +/******************************************************************************* + * Handler for servicing HAB SMC calls + ******************************************************************************/ +int imx_hab_handler(uint32_t smc_fid, + u_register_t x1, + u_register_t x2, + u_register_t x3, + u_register_t x4) +{ + switch (x1) { + case IMX_SIP_HAB_ENTRY: + return g_hab_rvt_api->entry(); + case IMX_SIP_HAB_EXIT: + return g_hab_rvt_api->exit(); + case IMX_SIP_HAB_CHECK_TARGET: + return g_hab_rvt_api->check_target((enum hab_target)x2, + (const void *)x3, (size_t)x4); + case IMX_SIP_HAB_AUTH_IMG: + return (unsigned long)g_hab_rvt_api->authenticate_image(HAB_CID_ATF, + x2, (void **)x3, (size_t *)x4, NULL); + case IMX_SIP_HAB_REPORT_EVENT: + return g_hab_rvt_api->report_event(HAB_FAILURE, + (uint32_t)x2, (uint8_t *)x3, (size_t *)x4); + case IMX_SIP_HAB_REPORT_STATUS: + return g_hab_rvt_api->report_status((enum hab_config *)x2, + (enum hab_state *)x3); + case IMX_SIP_HAB_FAILSAFE: + g_hab_rvt_api->failsafe(); + break; + case IMX_SIP_HAB_AUTH_IMG_NO_DCD: + return (unsigned long)g_hab_rvt_api->authenticate_image_no_dcd( + HAB_CID_ATF, x2, (void **)x3, (size_t *)x4, NULL); + case IMX_SIP_HAB_GET_VERSION: + return g_hab_rvt_api->get_version(); + default: + return SMC_UNK; + }; + + return SMC_OK; +} |