Entity: otp_ctrl_part_buf

• File: otp_ctrl_part_buf.sv

Diagram

Description

Generics

Generic name	Type	Value	Description
Info	part_info_t	PartInfoDefault	Partition information.
Info	logic [Info.size*8-1:0]	'0

Ports

Port name	Direction	Type	Description
clk_i	input
rst_ni	input
init_req_i	input		Pulse to start partition initialisation (required once per power cycle).
init_done_o	output
integ_chk_req_i	input		Integrity check requests
integ_chk_ack_o	output
cnsty_chk_req_i	input		Consistency check requests
cnsty_chk_ack_o	output
escalate_en_i	input		Escalation input. This moves the FSM into a terminal state and locks down the partition.
check_byp_en_i	input		Check bypass enable. This bypasses integrity and consistency checks and acknowledges all incoming check requests (only used by life cycle).
error_o	output	otp_err_e	Output error state of partition, to be consumed by OTP error/alert logic. Note that most errors are not recoverable and move the partition FSM into a terminal error state.
access_i	input	part_access_t	runtime lock from CSRs
access_o	output	part_access_t
digest_o	output	[ScrmblBlockWidth-1:0]	Buffered 64bit digest output.
data_o	output	[Info.size*8-1:0]
otp_req_o	output		OTP interface
otp_cmd_o	output
otp_size_o	output	[OtpSizeWidth-1:0]
otp_wdata_o	output	[OtpIfWidth-1:0]
otp_addr_o	output	[OtpAddrWidth-1:0]
otp_gnt_i	input
otp_rvalid_i	input
otp_rdata_i	input	[ScrmblBlockWidth-1:0]
otp_err_i	input
scrmbl_mtx_req_o	output		Scrambling mutex request
scrmbl_mtx_gnt_i	input
scrmbl_cmd_o	output	otp_scrmbl_cmd_e	Scrambling datapath interface
scrmbl_mode_o	output	digest_mode_e
scrmbl_sel_o	output	[ConstSelWidth-1:0]
scrmbl_data_o	output	[ScrmblBlockWidth-1:0]
scrmbl_valid_o	output
scrmbl_ready_i	input
scrmbl_valid_i	input
scrmbl_data_i	input	[ScrmblBlockWidth-1:0]

Signals

Name	Type	Description
state_d	state_e
state_q	state_e
error_d	otp_err_e
error_q	otp_err_e
data_sel	data_sel_e
base_sel	base_sel_e
dout_gate_d	access_e
dout_gate_q	access_e
cnt_d	logic [CntWidth-1:0]
cnt_q	logic [CntWidth-1:0]
cnt_en	logic
cnt_clr	logic
ecc_err	logic
buffer_reg_en	logic
data_mux	logic [ScrmblBlockWidth-1:0]
addr_base	logic [OtpByteAddrWidth-1:0]
addr_calc	logic [OtpByteAddrWidth-1:0]	Note that OTP works on halfword (16bit) addresses, hence need to shift the addresses appropriately.
data	logic [Info.size*8-1:0]
access	part_access_t	////////////////////// DAI Access Control // //////////////////////
access_in	logic [$bits(part_access_t)-1:0]	Make sure there is a hand-picked buffer on each bit to prevent the synthesis tool from optimizing the multibit signal.
access_out	logic [$bits(part_access_t)-1:0]	Make sure there is a hand-picked buffer on each bit to prevent the synthesis tool from optimizing the multibit signal.
state_raw_q	logic [StateWidth-1:0]	///////////// Registers // ///////////// This primitive is used to place a size-only constraint on the flops in order to prevent FSM state encoding optimizations.

Constants

Name	Type	Value	Description
DigestOffsetInt	int unsigned	(int'(Info.offset) +
NumScrmblBlocks	int	int'(Info.size)
CntWidth	int	vbits(NumScrmblBlocks)
DigestOffset	bit [OtpByteAddrWidth-1:0]	undefined
LastScrmblBlockInt	int unsigned	NumScrmblBlocks - 1
PenultimateScrmblBlockInt	int unsigned	NumScrmblBlocks - 2
LastScrmblBlock	bit [CntWidth-1:0]	undefined
PenultimateScrmblBlock	bit [CntWidth-1:0]	undefined
StateWidth	int	12	///////////////////// OTP Partition FSM // ///////////////////// Encoding generated with ./sparse-fsm-encode.py -d 5 -m 16 -n 12 -s 3370657881 Hamming distance histogram: 0: -- 1: -- 2: -- 3: -- 4: -- 5:

Types

Name	Type	Description
state_e	enum logic [StateWidth-1:0] { ResetSt = 12'b001001101010, InitSt = 12'b110100100111, InitWaitSt = 12'b001110110001, InitDescrSt = 12'b110010000100, InitDescrWaitSt = 12'b101000011100, IdleSt = 12'b100110101000, IntegScrSt = 12'b010101001101, IntegScrWaitSt = 12'b110101011010, IntegDigClrSt = 12'b011000011011, IntegDigSt = 12'b101001000001, IntegDigPadSt = 12'b101111010111, IntegDigFinSt = 12'b011011100101, IntegDigWaitSt = 12'b100011110010, CnstyReadSt = 12'b111111101110, CnstyReadWaitSt = 12'b001100000110, ErrorSt = 12'b000011011001 }
data_sel_e	enum logic { ScrmblData, OtpData }
base_sel_e	enum logic { PartOffset, DigOffset }

Processes

• p_fsm: ( )

• p_regs: ( @(posedge clk_i or negedge rst_ni) )

Instantiations

• u_otp_ctrl_ecc_reg: otp_ctrl_ecc_reg

• u_state_regs: prim_flop