lpp_bootloader.vhd
145 lines
| 4.9 KiB
| text/x-vhdl
|
VhdlLexer
pellion
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r110 | ------------------------------------------------------------------------------ | ||
-- This file is a part of the LPP VHDL IP LIBRARY | ||||
-- Copyright (C) 2009 - 2010, Laboratory of Plasmas Physic - CNRS | ||||
-- | ||||
-- 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, write to the Free Software | ||||
-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||||
------------------------------------------------------------------------------- | ||||
-- Author : Jean-christophe Pellion | ||||
-- Mail : jean-christophe.pellion@lpp.polytechnique.fr | ||||
-- jean-christophe.pellion@easii-ic.com | ||||
---------------------------------------------------------------------------- | ||||
LIBRARY ieee; | ||||
USE ieee.std_logic_1164.ALL; | ||||
LIBRARY grlib; | ||||
USE grlib.amba.ALL; | ||||
USE grlib.stdlib.ALL; | ||||
USE grlib.devices.ALL; | ||||
LIBRARY lpp; | ||||
USE lpp.lpp_bootloader_pkg.ALL; | ||||
USE lpp.apb_devices_list.ALL; | ||||
ENTITY lpp_bootloader IS | ||||
GENERIC ( | ||||
pindex : INTEGER := 1; | ||||
paddr : INTEGER := 1; | ||||
pmask : INTEGER := 16#fff#; | ||||
hindex : INTEGER := 0; | ||||
haddr : INTEGER := 0; | ||||
hmask : INTEGER := 16#fff# | ||||
); | ||||
PORT ( | ||||
-- AMBA AHB system signals | ||||
HCLK : IN STD_ULOGIC; | ||||
HRESETn : IN STD_ULOGIC; | ||||
-- AMBA APB Slave Interface | ||||
apbi : IN apb_slv_in_type; | ||||
apbo : OUT apb_slv_out_type; | ||||
-- AMBA AHB Slave Interface | ||||
ahbsi : IN ahb_slv_in_type; | ||||
ahbso : OUT ahb_slv_out_type | ||||
); | ||||
END lpp_bootloader; | ||||
ARCHITECTURE Beh OF lpp_bootloader IS | ||||
CONSTANT REVISION : INTEGER := 1; | ||||
CONSTANT pconfig : apb_config_type := ( | ||||
0 => ahb_device_reg (VENDOR_LPP, LPP_BOOTLOADER_TYPE, 0, REVISION, 0), | ||||
1 => apb_iobar(paddr, pmask)); | ||||
TYPE lpp_bootloader_regs IS RECORD | ||||
config_wait_on_boot : STD_LOGIC; | ||||
config_start_execution : STD_LOGIC; | ||||
addr_start_execution : STD_LOGIC_VECTOR(31 DOWNTO 0); | ||||
addr_fp : STD_LOGIC_VECTOR(31 DOWNTO 0); | ||||
END RECORD; | ||||
SIGNAL reg : lpp_bootloader_regs; | ||||
SIGNAL prdata : STD_LOGIC_VECTOR(31 DOWNTO 0); | ||||
BEGIN -- Beh | ||||
----------------------------------------------------------------------------- | ||||
-- AHBROM | ||||
----------------------------------------------------------------------------- | ||||
ahbrom_1 : ahbrom | ||||
GENERIC MAP ( | ||||
hindex => hindex, | ||||
haddr => haddr, | ||||
hmask => hmask, | ||||
pipe => 0, | ||||
tech => 0, | ||||
kbytes => 1) | ||||
PORT MAP ( | ||||
rst => HRESETn, | ||||
clk => HCLK, | ||||
ahbsi => ahbsi, | ||||
ahbso => ahbso); | ||||
----------------------------------------------------------------------------- | ||||
-- APB REG | ||||
----------------------------------------------------------------------------- | ||||
lpp_bootloader_apbreg : PROCESS (HCLK, HRESETn) | ||||
VARIABLE paddr : STD_LOGIC_VECTOR(7 DOWNTO 2); | ||||
BEGIN -- PROCESS lpp_dma_top | ||||
IF HRESETn = '0' THEN -- asynchronous reset (active low) | ||||
reg.config_wait_on_boot <= '1'; | ||||
reg.config_start_execution <= '0'; | ||||
reg.addr_start_execution <= X"40000000"; | ||||
prdata <= (OTHERS => '0'); | ||||
ELSIF HCLK'EVENT AND HCLK = '1' THEN -- rising clock edge | ||||
paddr := "000000"; | ||||
paddr(7 DOWNTO 2) := apbi.paddr(7 DOWNTO 2); | ||||
prdata <= (OTHERS => '0'); | ||||
IF apbi.psel(pindex) = '1' THEN | ||||
-- APB DMA READ -- | ||||
CASE paddr(7 DOWNTO 2) IS | ||||
WHEN "000000" => prdata(0) <= reg.config_wait_on_boot; | ||||
prdata(31 DOWNTO 1) <= (OTHERS => '0'); | ||||
WHEN "000001" => prdata(0) <= reg.config_start_execution; | ||||
prdata(31 DOWNTO 1) <= (OTHERS => '0'); | ||||
WHEN "000010" => prdata <= reg.addr_start_execution; | ||||
WHEN OTHERS => NULL; | ||||
END CASE; | ||||
IF (apbi.pwrite AND apbi.penable) = '1' THEN | ||||
-- APB DMA WRITE -- | ||||
CASE paddr(7 DOWNTO 2) IS | ||||
WHEN "000000" => reg.config_wait_on_boot <= apbi.pwdata(0); | ||||
WHEN "000001" => reg.config_start_execution <= apbi.pwdata(0); | ||||
WHEN "000010" => reg.addr_start_execution <= apbi.pwdata; | ||||
WHEN OTHERS => NULL; | ||||
END CASE; | ||||
END IF; | ||||
END IF; | ||||
END IF; | ||||
END PROCESS lpp_bootloader_apbreg; | ||||
apbo.pirq <= (OTHERS => '0'); | ||||
apbo.pindex <= pindex; | ||||
apbo.pconfig <= pconfig; | ||||
apbo.prdata <= prdata; | ||||
END Beh; | ||||