mtk-lk/platform/mt6580/dm_verity_status.c

/* Copyright Statement:
 *
 * This software/firmware and related documentation ("MediaTek Software") are
 * protected under relevant copyright laws. The information contained herein
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 */
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 *
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 * THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
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#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <sys/types.h>
#include <dm_verity_status.h>

#include <platform/mt_typedefs.h>
#include <platform/mt_reg_base.h>
#include <pal_typedefs.h>
#include <pal_log.h>

#define MISC_LOCK_KEY_MAGIC (0x0000ad98)

#define BOOT_MISC2_IDX      (2)
#define RSA_CON_BIT(idx)    (0x1 << idx)

#define BOOT_MISC2          (INFRACFG_AO_BASE + 0x820)
#define MISC_LOCK_KEY       (INFRACFG_AO_BASE + 0x838)
#define RST_CON             (INFRACFG_AO_BASE + 0x840)

#define BOOT_MISC2_DM_VERITY_ERR (0x1 << 0)

#define UNIT_TEST (0)

void get_dm_verity_status(uint32_t *status)
{
	uint32_t dm_verity_state_reg = DM_VERITY_STATUS_OK;

	if (status == NULL)
		return;

	*status = DM_VERITY_STATUS_OK;

#ifdef MTK_SECURITY_SW_SUPPORT
	if (DRV_Reg32(BOOT_MISC2) & BOOT_MISC2_DM_VERITY_ERR) {
		dm_verity_state_reg = DM_VERITY_GENERAL_ERROR;
		*status = DM_VERITY_GENERAL_ERROR;
	}

#if UNIT_TEST
	/* this part should be implemented in kernel, it's here
	 * for UT purpose
	 */
	DRV_WriteReg32(MISC_LOCK_KEY, MISC_LOCK_KEY_MAGIC);
	DRV_WriteReg32(RST_CON, DRV_Reg32(RST_CON) |
			RSA_CON_BIT(BOOT_MISC2_IDX));
	DRV_WriteReg32(MISC_LOCK_KEY, 0);

	DRV_WriteReg32(BOOT_MISC2, DRV_Reg32(BOOT_MISC2) |
			BOOT_MISC2_DM_VERITY_ERR);
#endif
#endif

	return;
}

void clear_dm_verity_status(void)
{
	uint32_t reg_val = 0;

	reg_val = DRV_Reg32(BOOT_MISC2);
	reg_val &= ~BOOT_MISC2_DM_VERITY_ERR;
	DRV_WriteReg32(BOOT_MISC2, reg_val);

	return;
}