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vhdl/projects/vga_ctrl/src/main_irom_ld.vhdl
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jens 0a2abde8bf - added 
git-svn-id: http://moon:8086/svn/vhdl/trunk@1418 cc03376c-175c-47c8-b038-4cd826a8556b
2021-03-21 11:05:13 +00:00

1182 lines
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VHDL
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-------------------------------------------------------------------------
-- Project: JCPU, a portable 8-bit RISC CPU written in VHDL
-- This file: loadable ROM
--
-- Copyright (C) 2007 J. Ahrensfeld
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program. If not, see <http://www.gnu.org/licenses/>.
--
-- For questions and ideas, please contact the author at jens@jayfield.org
--
--------------------------------------------------------------------------
LIBRARY ieee;
use IEEE.STD_LOGIC_1164.ALL;
USE ieee.numeric_std.ALL;
library UNISIM;
use UNISIM.VComponents.all;
library work;
use work.cpu_pkg.all;
ENTITY irom IS
Port (
clk : in STD_LOGIC;
ce : in STD_LOGIC;
addr : in inst_addr_t;
dout : out inst_t
);
END irom;
ARCHITECTURE loadable OF irom IS
-- JASM_ROM_INSERT_HERE
-- Assembled from main.jsm
type imem_rom_t is array (0 to 1023) of inst_t;
signal imem_rom : imem_rom_t :=
(
"110000" & X"002", -- 0x000: JMP 0x002
"111111" & X"000", -- 0x001: RETI
"101000" & X"0B0", -- 0x002: XIN R00, (0x0B)
"100100" & X"010", -- 0x003: XOUT (0x01), R00
"011001" & X"010", -- 0x004: AND R00, 0x01
"110001" & X"002", -- 0x005: JZ 0x002
"101000" & X"0B0", -- 0x006: XIN R00, (0x0B)
"100100" & X"010", -- 0x007: XOUT (0x01), R00
"111011" & X"06E", -- 0x008: CALL 0x06E
"111011" & X"055", -- 0x009: CALL 0x055
"000011" & X"000", -- 0x00A: MOV R00, 0x00
"000011" & X"001", -- 0x00B: MOV R01, 0x00
"111011" & X"05A", -- 0x00C: CALL 0x05A
"111011" & X"074", -- 0x00D: CALL 0x074
"000011" & X"030", -- 0x00E: MOV R00, 0x03
"111011" & X"06B", -- 0x00F: CALL 0x06B
"101001" & X"000", -- 0x010: CIN R00, (0x00)
"010001" & X"300", -- 0x011: ADD R00, 0x30
"111011" & X"05E", -- 0x012: CALL 0x05E
"000011" & X"000", -- 0x013: MOV R00, 0x00
"111011" & X"061", -- 0x014: CALL 0x061
"111011" & X"074", -- 0x015: CALL 0x074
"111011" & X"074", -- 0x016: CALL 0x074
"000011" & X"0D0", -- 0x017: MOV R00, 0x0D
"111011" & X"06B", -- 0x018: CALL 0x06B
"111011" & X"07B", -- 0x019: CALL 0x07B
"000011" & X"000", -- 0x01A: MOV R00, 0x00
"000011" & X"031", -- 0x01B: MOV R01, 0x03
"111011" & X"05A", -- 0x01C: CALL 0x05A
"000011" & X"160", -- 0x01D: MOV R00, 0x16
"111011" & X"06B", -- 0x01E: CALL 0x06B
"111011" & X"074", -- 0x01F: CALL 0x074
"000011" & X"000", -- 0x020: MOV R00, 0x00
"000011" & X"0A1", -- 0x021: MOV R01, 0x0A
"111011" & X"05A", -- 0x022: CALL 0x05A
"000011" & X"A0F", -- 0x023: MOV R15, 0xA0
"001111" & X"00F", -- 0x024: TST R15
"110001" & X"02F", -- 0x025: JZ 0x02F
"010101" & X"01F", -- 0x026: DEC R15
"000011" & X"301", -- 0x027: MOV R01, 0x30
"001111" & X"3A1", -- 0x028: CMP R01, 0x3A
"111001" & X"02E", -- 0x029: JEQ 0x02E
"000010" & X"010", -- 0x02A: MOV R00, R01
"010001" & X"011", -- 0x02B: INC R01
"111011" & X"05E", -- 0x02C: CALL 0x05E
"110000" & X"028", -- 0x02D: JMP 0x028
"110000" & X"024", -- 0x02E: JMP 0x024
"111011" & X"074", -- 0x02F: CALL 0x074
"000011" & X"000", -- 0x030: MOV R00, 0x00
"000011" & X"0C1", -- 0x031: MOV R01, 0x0C
"111011" & X"05A", -- 0x032: CALL 0x05A
"111011" & X"050", -- 0x033: CALL 0x050
"000011" & X"000", -- 0x034: MOV R00, 0x00
"000011" & X"1E1", -- 0x035: MOV R01, 0x1E
"111011" & X"05A", -- 0x036: CALL 0x05A
"000011" & X"0D0", -- 0x037: MOV R00, 0x0D
"111011" & X"06B", -- 0x038: CALL 0x06B
"111011" & X"07B", -- 0x039: CALL 0x07B
"000011" & X"0D0", -- 0x03A: MOV R00, 0x0D
"111011" & X"06B", -- 0x03B: CALL 0x06B
"111011" & X"07B", -- 0x03C: CALL 0x07B
"000011" & X"0D0", -- 0x03D: MOV R00, 0x0D
"111011" & X"06B", -- 0x03E: CALL 0x06B
"111011" & X"07B", -- 0x03F: CALL 0x07B
"000011" & X"0D0", -- 0x040: MOV R00, 0x0D
"111011" & X"06B", -- 0x041: CALL 0x06B
"111011" & X"07B", -- 0x042: CALL 0x07B
"000011" & X"0D0", -- 0x043: MOV R00, 0x0D
"111011" & X"06B", -- 0x044: CALL 0x06B
"111011" & X"07B", -- 0x045: CALL 0x07B
"000011" & X"0D0", -- 0x046: MOV R00, 0x0D
"111011" & X"06B", -- 0x047: CALL 0x06B
"111011" & X"07B", -- 0x048: CALL 0x07B
"000011" & X"0D0", -- 0x049: MOV R00, 0x0D
"111011" & X"06B", -- 0x04A: CALL 0x06B
"111011" & X"07B", -- 0x04B: CALL 0x07B
"000011" & X"0D0", -- 0x04C: MOV R00, 0x0D
"111011" & X"06B", -- 0x04D: CALL 0x06B
"111011" & X"074", -- 0x04E: CALL 0x074
"110000" & X"008", -- 0x04F: JMP 0x008
"111100" & X"000", -- 0x050: PUSH R00
"000011" & X"020", -- 0x051: MOV R00, 0x02
"100100" & X"0B0", -- 0x052: XOUT (0x0B), R00
"111101" & X"000", -- 0x053: POP R00
"111110" & X"000", -- 0x054: RET
"111100" & X"000", -- 0x055: PUSH R00
"000011" & X"010", -- 0x056: MOV R00, 0x01
"100100" & X"0B0", -- 0x057: XOUT (0x0B), R00
"111101" & X"000", -- 0x058: POP R00
"111110" & X"000", -- 0x059: RET
"111011" & X"06E", -- 0x05A: CALL 0x06E
"100100" & X"091", -- 0x05B: XOUT (0x09), R01
"100100" & X"080", -- 0x05C: XOUT (0x08), R00
"111110" & X"000", -- 0x05D: RET
"111011" & X"06E", -- 0x05E: CALL 0x06E
"100100" & X"0A0", -- 0x05F: XOUT (0x0A), R00
"111110" & X"000", -- 0x060: RET
"111100" & X"001", -- 0x061: PUSH R01
"000010" & X"001", -- 0x062: MOV R01, R00
"000100" & X"010", -- 0x063: MOVX R00, (R01)
"010001" & X"011", -- 0x064: INC R01
"001111" & X"000", -- 0x065: TST R00
"110001" & X"069", -- 0x066: JZ 0x069
"111011" & X"05E", -- 0x067: CALL 0x05E
"110000" & X"063", -- 0x068: JMP 0x063
"111101" & X"001", -- 0x069: POP R01
"111110" & X"000", -- 0x06A: RET
"111011" & X"050", -- 0x06B: CALL 0x050
"111011" & X"061", -- 0x06C: CALL 0x061
"111110" & X"000", -- 0x06D: RET
"111100" & X"000", -- 0x06E: PUSH R00
"101000" & X"0B0", -- 0x06F: XIN R00, (0x0B)
"011001" & X"020", -- 0x070: AND R00, 0x02
"110001" & X"06F", -- 0x071: JZ 0x06F
"111101" & X"000", -- 0x072: POP R00
"111110" & X"000", -- 0x073: RET
"111100" & X"00F", -- 0x074: PUSH R15
"000011" & X"0AF", -- 0x075: MOV R15, 0x0A
"111011" & X"07B", -- 0x076: CALL 0x07B
"010101" & X"01F", -- 0x077: DEC R15
"110010" & X"076", -- 0x078: JNZ 0x076
"111101" & X"00F", -- 0x079: POP R15
"111110" & X"000", -- 0x07A: RET
"111100" & X"00F", -- 0x07B: PUSH R15
"000011" & X"0AF", -- 0x07C: MOV R15, 0x0A
"111011" & X"082", -- 0x07D: CALL 0x082
"010101" & X"01F", -- 0x07E: DEC R15
"110010" & X"07D", -- 0x07F: JNZ 0x07D
"111101" & X"00F", -- 0x080: POP R15
"111110" & X"000", -- 0x081: RET
"111100" & X"00F", -- 0x082: PUSH R15
"000011" & X"0AF", -- 0x083: MOV R15, 0x0A
"111011" & X"089", -- 0x084: CALL 0x089
"010101" & X"01F", -- 0x085: DEC R15
"110010" & X"084", -- 0x086: JNZ 0x084
"111101" & X"00F", -- 0x087: POP R15
"111110" & X"000", -- 0x088: RET
"111100" & X"00F", -- 0x089: PUSH R15
"000011" & X"0AF", -- 0x08A: MOV R15, 0x0A
"111011" & X"090", -- 0x08B: CALL 0x090
"010101" & X"01F", -- 0x08C: DEC R15
"110010" & X"08B", -- 0x08D: JNZ 0x08B
"111101" & X"00F", -- 0x08E: POP R15
"111110" & X"000", -- 0x08F: RET
"111100" & X"00F", -- 0x090: PUSH R15
"000011" & X"0AF", -- 0x091: MOV R15, 0x0A
"111011" & X"097", -- 0x092: CALL 0x097
"010101" & X"01F", -- 0x093: DEC R15
"110010" & X"092", -- 0x094: JNZ 0x092
"111101" & X"00F", -- 0x095: POP R15
"111110" & X"000", -- 0x096: RET
"111100" & X"00F", -- 0x097: PUSH R15
"000011" & X"63F", -- 0x098: MOV R15, 0x63
"000000" & X"000", -- 0x099: NOP
"000000" & X"000", -- 0x09A: NOP
"000000" & X"000", -- 0x09B: NOP
"010101" & X"01F", -- 0x09C: DEC R15
"110010" & X"099", -- 0x09D: JNZ 0x099
"111101" & X"00F", -- 0x09E: POP R15
"111110" & X"000", -- 0x09F: RET
"111100" & X"00F", -- 0x0A0: PUSH R15
"000011" & X"09F", -- 0x0A1: MOV R15, 0x09
"000000" & X"000", -- 0x0A2: NOP
"000000" & X"000", -- 0x0A3: NOP
"000000" & X"000", -- 0x0A4: NOP
"010101" & X"01F", -- 0x0A5: DEC R15
"110010" & X"0A2", -- 0x0A6: JNZ 0x0A2
"111101" & X"00F", -- 0x0A7: POP R15
"111110" & X"000", -- 0x0A8: RET
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
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"000000" & X"000",
"000000" & X"000",
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"000000" & X"000",
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"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000",
"000000" & X"000"
);
signal jtag_ld_clk : STD_LOGIC;
signal jtag_ld_we : STD_LOGIC;
signal jtag_ld_addr : inst_addr_t;
signal jtag_ld_dout : inst_t;
signal jtag_ld_din : inst_t;
signal bs_rst, bs_sel, bs_shift, bs_tdi, bs_tdo : std_logic;
signal bs_capture, bs_clk0, bs_clk1, bs_update0, bs_update1 : std_logic;
signal user_regi, user_rego : unsigned (31 downto 0);
constant id : unsigned (31 downto 0) := X"BABE" & X"BEEF";
begin
--------------------------------------------------------------------------
-- Virtex-4: JTAG Loader
--------------------------------------------------------------------------
i00_BUFG : BUFG
port map
(
O => bs_clk1,
I => bs_clk0
);
i01_BUFG : BUFG
port map
(
O => bs_update1,
I => bs_update0
);
BSCAN_VIRTEX4_inst1 : BSCAN_VIRTEX4
generic map
(
JTAG_CHAIN => 1 -- Value to set BSCAN site of device. Possible values: (1,2,3 or 4)
)
port map
(
CAPTURE => bs_capture, -- CAPTURE output from TAP controller
DRCK => bs_clk0, -- Data register output for USER functions
RESET => bs_rst, -- Reset output from TAP controller
SEL => bs_sel, -- USER active output
SHIFT => bs_shift, -- SHIFT output from TAP controller
TDI => bs_tdi, -- TDI output from TAP controller
UPDATE => bs_update0, -- UPDATE output from TAP controller
TDO => bs_tdo -- Data input for USER function
);
jtag_ld_addr <= user_regi(user_regi'left downto user_regi'left-inst_addr_t'length+1);
jtag_ld_din <= user_regi(inst_t'length-1 downto 0);
jtag_ld_clk <= bs_update1;
jtag_ld_we <= bs_sel;
sipo:
process (bs_rst, bs_clk1, bs_tdi, bs_shift)
begin
if bs_rst = '1' then
user_regi <= (others => '0');
elsif rising_edge(bs_clk1) then
if bs_shift = '1' then
user_regi <= bs_tdi & user_regi(user_regi'left downto 1);
end if;
end if;
end process;
piso:
process (bs_rst, bs_clk1, bs_shift, user_rego)
begin
bs_tdo <= user_rego(0);
if bs_rst = '1' then
user_rego <= (others => '0');
elsif rising_edge(bs_clk1) then
if bs_shift = '1' then
user_rego <= user_rego(0) & user_rego(user_rego'left downto 1);
else
user_rego <= (user_rego'left downto inst_t'length => '0') & jtag_ld_dout;
-- user_rego <= id;
end if;
end if;
end process;
--------------------------------------------------------------------------
-- ROM Read/Write
--------------------------------------------------------------------------
PROM_READ:
process(clk, ce)
begin
if rising_edge(clk) and ce = '1' then
dout <= imem_rom(to_integer(addr));
end if;
end process;
PROM_WRITE:
process(jtag_ld_clk, jtag_ld_we)
begin
if rising_edge(jtag_ld_clk) then
if jtag_ld_we = '1' then
imem_rom(to_integer(jtag_ld_addr)) <= jtag_ld_din;
else
jtag_ld_dout <= imem_rom(to_integer(jtag_ld_addr));
end if;
end if;
end process;
--------------------------------------------------------------------------
end loadable;
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