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amba.vhd
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------------------------------------------------------------------------------
-- This file is a part of the GRLIB VHDL IP LIBRARY
-- Copyright (C) 2003 - 2008, Gaisler Research
-- Copyright (C) 2008 - 2010, Aeroflex Gaisler
--
-- 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 2 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
-----------------------------------------------------------------------------
-- Package: amba
-- File: amba.vhd
-- Author: Jiri Gaisler, Gaisler Research
-- Modified by: Jan Andersson, Aeroflex Gaisler
-- Description: AMBA 2.0 bus signal definitions + support for plug&play
------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
-- pragma translate_off
use std.textio.all;
-- pragma translate_on
library grlib;
use grlib.config.all;
use grlib.stdlib.all;
package amba is
-------------------------------------------------------------------------------
-- AMBA configuration
-------------------------------------------------------------------------------
-- AHBDW - AHB data with
--
-- Valid values are 32, 64, 128 and 256
--
-- The value here sets the width of the AMBA AHB data vectors for all
-- cores in the library.
--
constant AHBDW : integer := CFG_AHBDW;
-- CORE_ACDM - Enable AMBA Compliant Data Muxing in cores
--
-- Valid values are 0 and 1
--
-- 0: All GRLIB cores that use the ahbread* programs defined in this package
-- will read their data from the low part of the AHB data vector.
--
-- 1: All GRLIB cores that use the ahbread* programs defined in this package
-- will select valid data, as defined in the AMBA AHB standard, from the
-- AHB data vectors based on the address input. If a core uses a function
-- that does not have the address input, a failure will be asserted.
--
constant CORE_ACDM : integer := CFG_AHB_ACDM;
constant NAHBMST : integer := 16; -- maximum AHB masters
constant NAHBSLV : integer := 16; -- maximum AHB slaves
constant NAPBSLV : integer := 16; -- maximum APB slaves
constant NAHBIRQ : integer := 32; -- maximum interrupts
constant NAHBAMR : integer := 4; -- maximum address mapping registers
constant NAHBIR : integer := 4; -- maximum AHB identification registers
constant NAHBCFG : integer := NAHBIR + NAHBAMR; -- words in AHB config block
constant NAPBIR : integer := 1; -- maximum APB configuration words
constant NAPBAMR : integer := 1; -- maximum APB configuration words
constant NAPBCFG : integer := NAPBIR + NAPBAMR; -- words in APB config block
constant NBUS : integer := 4;
-------------------------------------------------------------------------------
-- AMBA interface type declarations and constant
-------------------------------------------------------------------------------
subtype amba_config_word is std_logic_vector(31 downto 0);
type ahb_config_type is array (0 to NAHBCFG-1) of amba_config_word;
type apb_config_type is array (0 to NAPBCFG-1) of amba_config_word;
-- AHB master inputs
type ahb_mst_in_type is record
hgrant : std_logic_vector(0 to NAHBMST-1); -- bus grant
hready : std_ulogic; -- transfer done
hresp : std_logic_vector(1 downto 0); -- response type
hrdata : std_logic_vector(AHBDW-1 downto 0); -- read data bus
hcache : std_ulogic; -- cacheable
hirq : std_logic_vector(NAHBIRQ-1 downto 0); -- interrupt result bus
testen : std_ulogic; -- scan test enable
testrst : std_ulogic; -- scan test reset
scanen : std_ulogic; -- scan enable
testoen : std_ulogic; -- test output enable
end record;
-- AHB master outputs
type ahb_mst_out_type is record
hbusreq : std_ulogic; -- bus request
hlock : std_ulogic; -- lock request
htrans : std_logic_vector(1 downto 0); -- transfer type
haddr : std_logic_vector(31 downto 0); -- address bus (byte)
hwrite : std_ulogic; -- read/write
hsize : std_logic_vector(2 downto 0); -- transfer size
hburst : std_logic_vector(2 downto 0); -- burst type
hprot : std_logic_vector(3 downto 0); -- protection control
hwdata : std_logic_vector(AHBDW-1 downto 0); -- write data bus
hirq : std_logic_vector(NAHBIRQ-1 downto 0); -- interrupt bus
hconfig : ahb_config_type; -- memory access reg.
hindex : integer range 0 to NAHBMST-1; -- diagnostic use only
end record;
-- AHB slave inputs
type ahb_slv_in_type is record
hsel : std_logic_vector(0 to NAHBSLV-1); -- slave select
haddr : std_logic_vector(31 downto 0); -- address bus (byte)
hwrite : std_ulogic; -- read/write
htrans : std_logic_vector(1 downto 0); -- transfer type
hsize : std_logic_vector(2 downto 0); -- transfer size
hburst : std_logic_vector(2 downto 0); -- burst type
hwdata : std_logic_vector(AHBDW-1 downto 0); -- write data bus
hprot : std_logic_vector(3 downto 0); -- protection control
hready : std_ulogic; -- transfer done
hmaster : std_logic_vector(3 downto 0); -- current master
hmastlock : std_ulogic; -- locked access
hmbsel : std_logic_vector(0 to NAHBAMR-1); -- memory bank select
hcache : std_ulogic; -- cacheable
hirq : std_logic_vector(NAHBIRQ-1 downto 0); -- interrupt result bus
testen : std_ulogic; -- scan test enable
testrst : std_ulogic; -- scan test reset
scanen : std_ulogic; -- scan enable
testoen : std_ulogic; -- test output enable
end record;
-- AHB slave outputs
type ahb_slv_out_type is record
hready : std_ulogic; -- transfer done
hresp : std_logic_vector(1 downto 0); -- response type
hrdata : std_logic_vector(AHBDW-1 downto 0); -- read data bus
hsplit : std_logic_vector(15 downto 0); -- split completion
hcache : std_ulogic; -- cacheable
hirq : std_logic_vector(NAHBIRQ-1 downto 0); -- interrupt bus
hconfig : ahb_config_type; -- memory access reg.
hindex : integer range 0 to NAHBSLV-1; -- diagnostic use only
end record;
-- array types
type ahb_mst_out_vector_type is array (natural range <>) of ahb_mst_out_type;
type ahb_mst_in_vector_type is array (natural range <>) of ahb_mst_in_type;
type ahb_slv_out_vector_type is array (natural range <>) of ahb_slv_out_type;
type ahb_slv_in_vector_type is array (natural range <>) of ahb_slv_in_type;
subtype ahb_mst_out_vector is ahb_mst_out_vector_type(NAHBMST-1 downto 0);
subtype ahb_slv_out_vector is ahb_slv_out_vector_type(NAHBSLV-1 downto 0);
type ahb_mst_out_bus_vector is array (0 to NBUS-1) of ahb_mst_out_vector;
type ahb_slv_out_bus_vector is array (0 to NBUS-1) of ahb_slv_out_vector;
-- constants
constant HTRANS_IDLE: std_logic_vector(1 downto 0) := "00";
constant HTRANS_BUSY: std_logic_vector(1 downto 0) := "01";
constant HTRANS_NONSEQ: std_logic_vector(1 downto 0) := "10";
constant HTRANS_SEQ: std_logic_vector(1 downto 0) := "11";
constant HBURST_SINGLE: std_logic_vector(2 downto 0) := "000";
constant HBURST_INCR: std_logic_vector(2 downto 0) := "001";
constant HBURST_WRAP4: std_logic_vector(2 downto 0) := "010";
constant HBURST_INCR4: std_logic_vector(2 downto 0) := "011";
constant HBURST_WRAP8: std_logic_vector(2 downto 0) := "100";
constant HBURST_INCR8: std_logic_vector(2 downto 0) := "101";
constant HBURST_WRAP16: std_logic_vector(2 downto 0) := "110";
constant HBURST_INCR16: std_logic_vector(2 downto 0) := "111";
constant HSIZE_BYTE: std_logic_vector(2 downto 0) := "000";
constant HSIZE_HWORD: std_logic_vector(2 downto 0) := "001";
constant HSIZE_WORD: std_logic_vector(2 downto 0) := "010";
constant HSIZE_DWORD: std_logic_vector(2 downto 0) := "011";
constant HSIZE_4WORD: std_logic_vector(2 downto 0) := "100";
constant HSIZE_8WORD: std_logic_vector(2 downto 0) := "101";
constant HSIZE_16WORD: std_logic_vector(2 downto 0) := "110";
constant HSIZE_32WORD: std_logic_vector(2 downto 0) := "111";
constant HRESP_OKAY: std_logic_vector(1 downto 0) := "00";
constant HRESP_ERROR: std_logic_vector(1 downto 0) := "01";
constant HRESP_RETRY: std_logic_vector(1 downto 0) := "10";
constant HRESP_SPLIT: std_logic_vector(1 downto 0) := "11";
-- APB slave inputs
type apb_slv_in_type is record
psel : std_logic_vector(0 to NAPBSLV-1); -- slave select
penable : std_ulogic; -- strobe
paddr : std_logic_vector(31 downto 0); -- address bus (byte)
pwrite : std_ulogic; -- write
pwdata : std_logic_vector(31 downto 0); -- write data bus
pirq : std_logic_vector(NAHBIRQ-1 downto 0); -- interrupt result bus
testen : std_ulogic; -- scan test enable
testrst : std_ulogic; -- scan test reset
scanen : std_ulogic; -- scan enable
testoen : std_ulogic; -- test output enable
end record;
-- APB slave outputs
type apb_slv_out_type is record
prdata : std_logic_vector(31 downto 0); -- read data bus
pirq : std_logic_vector(NAHBIRQ-1 downto 0); -- interrupt bus
pconfig : apb_config_type; -- memory access reg.
pindex : integer range 0 to NAPBSLV -1; -- diag use only
end record;
-- array types
type apb_slv_out_vector is array (0 to NAPBSLV-1) of apb_slv_out_type;
-- support for plug&play configuration
constant AMBA_CONFIG_VER0 : std_logic_vector(1 downto 0) := "00";
subtype amba_vendor_type is integer range 0 to 16#ff#;
subtype amba_device_type is integer range 0 to 16#3ff#;
subtype amba_version_type is integer range 0 to 16#3f#;
subtype amba_cfgver_type is integer range 0 to 3;
subtype amba_irq_type is integer range 0 to NAHBIRQ-1;
subtype ahb_addr_type is integer range 0 to 16#fff#;
constant zx : std_logic_vector(31 downto 0) := (others => '0');
constant zahbdw : std_logic_vector(AHBDW-1 downto 0) := (others => '0');
constant zxirq : std_logic_vector(NAHBIRQ-1 downto 0) := (others => '0');
constant zy : std_logic_vector(0 to 31) := (others => '0');
constant apb_none : apb_slv_out_type :=
(zx, zxirq(NAHBIRQ-1 downto 0), (others => zx), 0);
constant ahbm_none : ahb_mst_out_type := ( '0', '0', "00", zx,
'0', "000", "000", "0000", zahbdw, zxirq(NAHBIRQ-1 downto 0), (others => zx), 0);
constant ahbm_in_none : ahb_mst_in_type := ((others => '0'), '0', (others => '0'),
zahbdw, '0', zxirq(NAHBIRQ-1 downto 0), '0', '0', '0', '0');
constant ahbs_none : ahb_slv_out_type := (
'1', "00", zahbdw, zx(15 downto 0), '0', zxirq(NAHBIRQ-1 downto 0), (others => zx), 0);
constant ahbs_in_none : ahb_slv_in_type := (
zy(0 to NAHBSLV-1), zx, '0', "00", "000", "000", zahbdw,
"0000", '1', "0000", '0', zy(0 to NAHBAMR-1), '0', zxirq(NAHBIRQ-1 downto 0),
'0', '0', '0', '0');
constant ahbsv_none : ahb_slv_out_vector := (others => ahbs_none);
constant apb_slv_in_none : apb_slv_in_type := ((others => '0'), '0', (others => '0'),
'0', (others => '0'), (others => '0'),
'0', '0', '0', '0');
-------------------------------------------------------------------------------
-- Subprograms
-------------------------------------------------------------------------------
function ahb_device_reg(vendor : amba_vendor_type; device : amba_device_type;
cfgver : amba_cfgver_type; version : amba_version_type;
interrupt : amba_irq_type)
return std_logic_vector;
function ahb_membar(memaddr : ahb_addr_type; prefetch, cache : std_ulogic;
addrmask : ahb_addr_type)
return std_logic_vector;
function ahb_membar_opt(memaddr : ahb_addr_type; prefetch, cache : std_ulogic;
addrmask : ahb_addr_type; enable : integer)
return std_logic_vector;
function ahb_iobar(memaddr : ahb_addr_type; addrmask : ahb_addr_type)
return std_logic_vector;
function apb_iobar(memaddr : ahb_addr_type; addrmask : ahb_addr_type)
return std_logic_vector;
function ahb_slv_dec_cache(haddr : std_logic_vector(31 downto 0);
ahbso : ahb_slv_out_vector; cached : integer)
return std_ulogic;
function ahb_slv_dec_pfetch(haddr : std_logic_vector(31 downto 0);
ahbso : ahb_slv_out_vector)
return std_ulogic;
function ahb_membar_size (addrmask : ahb_addr_type) return integer;
function ahb_iobar_size (addrmask : ahb_addr_type) return integer;
function ahbdrivedata (hdata : std_logic_vector) return std_logic_vector;
function ahbselectdata (hdata : std_logic_vector(AHBDW-1 downto 0);
haddr : std_logic_vector(4 downto 2); hsize : std_logic_vector(2 downto 0))
return std_logic_vector;
function ahbreadword (
hdata : std_logic_vector(AHBDW-1 downto 0);
haddr : std_logic_vector(4 downto 2))
return std_logic_vector;
procedure ahbreadword (
hdata : in std_logic_vector(AHBDW-1 downto 0);
haddr : in std_logic_vector(4 downto 2);
data : out std_logic_vector(31 downto 0));
function ahbreadword (
hdata : std_logic_vector(AHBDW-1 downto 0))
return std_logic_vector;
procedure ahbreadword (
hdata : in std_logic_vector(AHBDW-1 downto 0);
data : out std_logic_vector(31 downto 0));
function ahbreaddword (
hdata : std_logic_vector(AHBDW-1 downto 0);
haddr : std_logic_vector(4 downto 2))
return std_logic_vector;
procedure ahbreaddword (
hdata : in std_logic_vector(AHBDW-1 downto 0);
haddr : in std_logic_vector(4 downto 2);
data : out std_logic_vector(63 downto 0));
function ahbreaddword (
hdata : std_logic_vector(AHBDW-1 downto 0))
return std_logic_vector;
procedure ahbreaddword (
hdata : in std_logic_vector(AHBDW-1 downto 0);
data : out std_logic_vector(63 downto 0));
function ahbread4word (
hdata : std_logic_vector(AHBDW-1 downto 0);
haddr : std_logic_vector(4 downto 2))
return std_logic_vector;
procedure ahbread4word (
hdata : in std_logic_vector(AHBDW-1 downto 0);
haddr : in std_logic_vector(4 downto 2);
data : out std_logic_vector(127 downto 0));
function ahbread4word (
hdata : std_logic_vector(AHBDW-1 downto 0))
return std_logic_vector;
procedure ahbread4word (
hdata : in std_logic_vector(AHBDW-1 downto 0);
data : out std_logic_vector(127 downto 0));
function ahbread8word (
hdata : std_logic_vector(AHBDW-1 downto 0);
haddr : std_logic_vector(4 downto 2))
return std_logic_vector;
procedure ahbread8word (
hdata : in std_logic_vector(AHBDW-1 downto 0);
haddr : in std_logic_vector(4 downto 2);
data : out std_logic_vector(255 downto 0));
function ahbread8word (
hdata : std_logic_vector(AHBDW-1 downto 0))
return std_logic_vector;
procedure ahbread8word (
hdata : in std_logic_vector(AHBDW-1 downto 0);
data : out std_logic_vector(255 downto 0));
function ahbreaddata (
hdata : std_logic_vector(AHBDW-1 downto 0);
haddr : std_logic_vector(4 downto 2);
hsize : std_logic_vector(2 downto 0))
return std_logic_vector;
function ahbreaddata (
hdata : std_logic_vector(AHBDW-1 downto 0);
hsize : std_logic_vector(2 downto 0))
return std_logic_vector;
procedure ahbmomux (
signal ai : in ahb_mst_out_type;
signal ao : out ahb_mst_out_type;
signal en : in std_ulogic);
procedure ahbsomux (
signal ai : in ahb_slv_out_type;
signal ao : out ahb_slv_out_type;
signal en : in std_ulogic);
procedure apbsomux (
signal ai : in apb_slv_out_type;
signal ao : out apb_slv_out_type;
signal en : in std_ulogic);
-------------------------------------------------------------------------------
-- Components
-------------------------------------------------------------------------------
component ahbctrl
generic (
defmast : integer := 0; -- default master
split : integer := 0; -- split support
rrobin : integer := 0; -- round-robin arbitration
timeout : integer range 0 to 255 := 0; -- HREADY timeout
ioaddr : ahb_addr_type := 16#fff#; -- I/O area MSB address
iomask : ahb_addr_type := 16#fff#; -- I/O area address mask
cfgaddr : ahb_addr_type := 16#ff0#; -- config area MSB address
cfgmask : ahb_addr_type := 16#ff0#; -- config area address mask
nahbm : integer range 1 to NAHBMST := NAHBMST; -- number of masters
nahbs : integer range 1 to NAHBSLV := NAHBSLV; -- number of slaves
ioen : integer range 0 to 15 := 1; -- enable I/O area
disirq : integer range 0 to 1 := 0; -- disable interrupt routing
fixbrst : integer range 0 to 1 := 0; -- support fix-length bursts
debug : integer range 0 to 2 := 2; -- print config to console
fpnpen : integer range 0 to 1 := 0; -- full PnP configuration decoding
icheck : integer range 0 to 1 := 1;
devid : integer := 0; -- unique device ID
enbusmon : integer range 0 to 1 := 0; --enable bus monitor
assertwarn : integer range 0 to 1 := 0; --enable assertions for warnings
asserterr : integer range 0 to 1 := 0; --enable assertions for errors
hmstdisable : integer := 0; --disable master checks
hslvdisable : integer := 0; --disable slave checks
arbdisable : integer := 0; --disable arbiter checks
mprio : integer := 0; --master with highest priority
mcheck : integer := 1; --check memory map for intersects
ccheck : integer range 0 to 1 := 1; --perform sanity checks on pnp config
acdm : integer := 0; --AMBA compliant data muxing (for hsize > word)
index : integer := 0; --index for trace print-out
ahbtrace : integer := 0 --AHB trace enable
);
port (
rst : in std_ulogic;
clk : in std_ulogic;
msti : out ahb_mst_in_type;
msto : in ahb_mst_out_vector;
slvi : out ahb_slv_in_type;
slvo : in ahb_slv_out_vector;
testen : in std_ulogic := '0';
testrst : in std_ulogic := '1';
scanen : in std_ulogic := '0';
testoen : in std_ulogic := '1'
);
end component;
component apbctrl
generic (
hindex : integer := 0;
haddr : integer := 0;
hmask : integer := 16#fff#;
nslaves : integer range 1 to NAPBSLV := NAPBSLV;
debug : integer range 0 to 2 := 2; -- print config to console
icheck : integer range 0 to 1 := 1;
enbusmon : integer range 0 to 1 := 0;
asserterr : integer range 0 to 1 := 0;
assertwarn : integer range 0 to 1 := 0;
pslvdisable : integer := 0;
mcheck : integer range 0 to 1 := 1;
ccheck : integer range 0 to 1 := 1
);
port (
rst : in std_ulogic;
clk : in std_ulogic;
ahbi : in ahb_slv_in_type;
ahbo : out ahb_slv_out_type;
apbi : out apb_slv_in_type;
apbo : in apb_slv_out_vector
);
end component;
component ahbctrl_mb
generic (
defmast : integer := 0; -- default master
split : integer := 0; -- split support
rrobin : integer := 0; -- round-robin arbitration
timeout : integer range 0 to 255 := 0; -- HREADY timeout
ioaddr : ahb_addr_type := 16#fff#; -- I/O area MSB address
iomask : ahb_addr_type := 16#fff#; -- I/O area address mask
cfgaddr : ahb_addr_type := 16#ff0#; -- config area MSB address
cfgmask : ahb_addr_type := 16#ff0#; -- config area address mask
nahbm : integer range 1 to NAHBMST := NAHBMST; -- number of masters
nahbs : integer range 1 to NAHBSLV := NAHBSLV; -- number of slaves
ioen : integer range 0 to 15 := 1; -- enable I/O area
disirq : integer range 0 to 1 := 0; -- disable interrupt routing
fixbrst : integer range 0 to 1 := 0; -- support fix-length bursts
debug : integer range 0 to 2 := 2; -- report cores to console
fpnpen : integer range 0 to 1 := 0; -- full PnP configuration decoding
busndx : integer range 0 to 3 := 0;
icheck : integer range 0 to 1 := 1;
devid : integer := 0; -- unique device ID
enbusmon : integer range 0 to 1 := 0; --enable bus monitor
assertwarn : integer range 0 to 1 := 0; --enable assertions for warnings
asserterr : integer range 0 to 1 := 0; --enable assertions for errors
hmstdisable : integer := 0; --disable master checks
hslvdisable : integer := 0; --disable slave checks
arbdisable : integer := 0; --disable arbiter checks
mprio : integer := 0; --master with highest priority
mcheck : integer := 1; --check memory map for intersect
ccheck : integer range 0 to 1 := 1; --perform sanity checks on pnp config
acdm : integer := 0 --AMBA compliant data muxing (for hsize > word)
);
port (
rst : in std_ulogic;
clk : in std_ulogic;
msti : out ahb_mst_in_type;
msto : in ahb_mst_out_bus_vector;
slvi : out ahb_slv_in_type;
slvo : in ahb_slv_out_bus_vector;
testen : in std_ulogic := '0';
testrst : in std_ulogic := '1';
scanen : in std_ulogic := '0';
testoen : in std_ulogic := '1'
);
end component;
component ahbdefmst
generic ( hindex : integer range 0 to NAHBMST-1 := 0);
port ( ahbmo : out ahb_mst_out_type);
end component;
-- pragma translate_off
component ahbmon is
generic(
asserterr : integer range 0 to 1 := 1;
assertwarn : integer range 0 to 1 := 1;
hmstdisable : integer := 0;
hslvdisable : integer := 0;
arbdisable : integer := 0;
nahbm : integer range 0 to NAHBMST := NAHBMST;
nahbs : integer range 0 to NAHBSLV := NAHBSLV;
ebterm : integer range 0 to 1 := 0
);
port(
rst : in std_ulogic;
clk : in std_ulogic;
ahbmi : in ahb_mst_in_type;
ahbmo : in ahb_mst_out_vector;
ahbsi : in ahb_slv_in_type;
ahbso : in ahb_slv_out_vector;
err : out std_ulogic);
end component;
component apbmon is
generic(
asserterr : integer range 0 to 1 := 1;
assertwarn : integer range 0 to 1 := 1;
pslvdisable : integer := 0;
napb : integer range 0 to NAPBSLV := NAPBSLV
);
port(
rst : in std_ulogic;
clk : in std_ulogic;
apbi : in apb_slv_in_type;
apbo : in apb_slv_out_vector;
err : out std_ulogic);
end component;
component ambamon is
generic(
asserterr : integer range 0 to 1 := 1;
assertwarn : integer range 0 to 1 := 1;
hmstdisable : integer := 0;
hslvdisable : integer := 0;
pslvdisable : integer := 0;
arbdisable : integer := 0;
nahbm : integer range 0 to NAHBMST := NAHBMST;
nahbs : integer range 0 to NAHBSLV := NAHBSLV;
napb : integer range 0 to NAPBSLV := NAPBSLV;
ebterm : integer range 0 to 1 := 0
);
port(
rst : in std_ulogic;
clk : in std_ulogic;
ahbmi : in ahb_mst_in_type;
ahbmo : in ahb_mst_out_vector;
ahbsi : in ahb_slv_in_type;
ahbso : in ahb_slv_out_vector;
apbi : in apb_slv_in_type;
apbo : in apb_slv_out_vector;
err : out std_ulogic);
end component;
subtype vendor_description is string(1 to 24);
subtype device_description is string(1 to 31);
type device_table_type is array (0 to 1023) of device_description;
type vendor_library_type is record
vendorid : amba_vendor_type;
vendordesc : vendor_description;
device_table : device_table_type;
end record;
type device_array is array (0 to 255) of vendor_library_type;
-- pragma translate_on
end;
package body amba is
function ahb_device_reg(vendor : amba_vendor_type; device : amba_device_type;
cfgver : amba_cfgver_type; version : amba_version_type;
interrupt : amba_irq_type)
return std_logic_vector is
variable cfg : std_logic_vector(31 downto 0);
begin
case cfgver is
when 0 =>
cfg(31 downto 24) := std_logic_vector(to_unsigned(vendor, 8));
cfg(23 downto 12) := std_logic_vector(to_unsigned(device, 12));
cfg(11 downto 10) := std_logic_vector(to_unsigned(cfgver, 2));
cfg( 9 downto 5) := std_logic_vector(to_unsigned(version, 5));
cfg( 4 downto 0) := std_logic_vector(to_unsigned(interrupt, 5));
when others => cfg := (others => '0');
end case;
return(cfg);
end;
function ahb_membar(memaddr : ahb_addr_type; prefetch, cache : std_ulogic;
addrmask : ahb_addr_type)
return std_logic_vector is
variable cfg : std_logic_vector(31 downto 0);
begin
cfg(31 downto 20) := std_logic_vector(to_unsigned(memaddr, 12));
cfg(19 downto 16) := "00" & prefetch & cache;
cfg(15 downto 4) := std_logic_vector(to_unsigned(addrmask, 12));
cfg( 3 downto 0) := "0010";
return(cfg);
end;
function ahb_membar_opt(memaddr : ahb_addr_type; prefetch, cache : std_ulogic;
addrmask : ahb_addr_type; enable : integer)
return std_logic_vector is
variable cfg : std_logic_vector(31 downto 0);
begin
cfg := (others => '0');
if enable /= 0 then
return (ahb_membar(memaddr, prefetch, cache, addrmask));
else return(cfg); end if;
end;
function ahb_iobar(memaddr : ahb_addr_type; addrmask : ahb_addr_type)
return std_logic_vector is
variable cfg : std_logic_vector(31 downto 0);
begin
cfg(31 downto 20) := std_logic_vector(to_unsigned(memaddr, 12));
cfg(19 downto 16) := "0000";
cfg(15 downto 4) := std_logic_vector(to_unsigned(addrmask, 12));
cfg( 3 downto 0) := "0011";
return(cfg);
end;
function apb_iobar(memaddr : ahb_addr_type; addrmask : ahb_addr_type)
return std_logic_vector is
variable cfg : std_logic_vector(31 downto 0);
begin
cfg(31 downto 20) := std_logic_vector(to_unsigned(memaddr, 12));
cfg(19 downto 16) := "0000";
cfg(15 downto 4) := std_logic_vector(to_unsigned(addrmask, 12));
cfg( 3 downto 0) := "0001";
return(cfg);
end;
function ahb_slv_dec_cache(haddr : std_logic_vector(31 downto 0);
ahbso : ahb_slv_out_vector; cached : integer)
return std_ulogic is
variable hcache : std_ulogic;
variable ctbl : std_logic_vector(15 downto 0);
begin
hcache := '0'; ctbl := (others => '0');
if cached = 0 then
for i in 0 to NAHBSLV-1 loop
for j in NAHBAMR to NAHBCFG-1 loop
if (ahbso(i).hconfig(j)(16) = '1') and
(ahbso(i).hconfig(j)(15 downto 4) /= "000000000000")
then
if (haddr(31 downto 20) and ahbso(i).hconfig(j)(15 downto 4)) =
(ahbso(i).hconfig(j)(31 downto 20) and ahbso(i).hconfig(j)(15 downto 4)) then
hcache := '1';
end if;
end if;
end loop;
end loop;
else
ctbl := conv_std_logic_vector(cached, 16);
hcache := ctbl(conv_integer(haddr(31 downto 28)));
end if;
return(hcache);
end;
function ahb_slv_dec_pfetch(haddr : std_logic_vector(31 downto 0);
ahbso : ahb_slv_out_vector)
return std_ulogic is
variable pfetch : std_ulogic;
begin
pfetch := '0';
for i in 0 to NAHBSLV-1 loop
for j in NAHBAMR to NAHBCFG-1 loop
if ((ahbso(i).hconfig(j)(17) = '1') and
(ahbso(i).hconfig(j)(15 downto 4) /= "000000000000"))
then
if (haddr(31 downto 20) and ahbso(i).hconfig(j)(15 downto 4)) =
(ahbso(i).hconfig(j)(31 downto 20) and ahbso(i).hconfig(j)(15 downto 4)) then
pfetch := '1';
end if;
end if;
end loop;
end loop;
return(pfetch);
end;
function ahb_membar_size (addrmask : ahb_addr_type) return integer is
begin
if addrmask = 0 then return 0; end if;
return (4096 - addrmask) * 1024 * 1024;
end;
function ahb_iobar_size (addrmask : ahb_addr_type) return integer is
begin
return (4096 - addrmask) * 256;
end;
-- purpose: Duplicates 'hdata' to suite AHB data width. If the input vector's
-- length exceeds AHBDW the low part is returned.
function ahbdrivedata (
hdata : std_logic_vector)
return std_logic_vector is
variable data : std_logic_vector(AHBDW-1 downto 0);
begin -- ahbdrivedata
if AHBDW < hdata'length then
data := hdata(AHBDW+hdata'low-1 downto hdata'low);
else
for i in 0 to AHBDW/hdata'length-1 loop
data(hdata'length-1+hdata'length*i downto hdata'length*i) := hdata;
end loop;
end if;
return data;
end ahbdrivedata;
-- Takes in AHB data vector 'hdata' and returns valid data on the full
-- data vector output based on 'haddr' and 'hsize' inputs together with
-- GRLIB AHB bus width. The function works down to word granularity.
function ahbselectdata (
hdata : std_logic_vector(AHBDW-1 downto 0);
haddr : std_logic_vector(4 downto 2);
hsize : std_logic_vector(2 downto 0))
return std_logic_vector is
variable ret : std_logic_vector(AHBDW-1 downto 0);
begin -- ahbselectdata
case hsize is
when HSIZE_8WORD =>
if AHBDW = 256 then ret := hdata; end if;
when HSIZE_4WORD =>
if AHBDW = 256 then
if haddr(4) = '0' then ret := ahbdrivedata(hdata(AHBDW-1 downto AHBDW/2));
else ret := ahbdrivedata(hdata(AHBDW/2-1 downto 0)); end if;
elsif AHBDW = 128 then
ret := hdata;
end if;
when HSIZE_DWORD =>
if AHBDW = 256 then
case haddr(4 downto 3) is
when "00" => ret := ahbdrivedata(hdata(4*(AHBDW/4)-1 downto 3*(AHBDW/4)));
when "01" => ret := ahbdrivedata(hdata(3*(AHBDW/4)-1 downto 2*(AHBDW/4)));
when "10" => ret := ahbdrivedata(hdata(2*(AHBDW/4)-1 downto 1*(AHBDW/4)));
when others => ret := ahbdrivedata(hdata(1*(AHBDW/4)-1 downto 0*(AHBDW/4)));
end case;
elsif AHBDW = 128 then
if haddr(3) = '0' then ret := ahbdrivedata(hdata(AHBDW-1 downto AHBDW/2));
else ret := ahbdrivedata(hdata(AHBDW/2-1 downto 0)); end if;
elsif AHBDW = 64 then
ret := hdata;
end if;
when others =>
if AHBDW = 256 then
case haddr(4 downto 2) is
when "000" => ret := ahbdrivedata(hdata(8*(AHBDW/8)-1 downto 7*(AHBDW/8)));
when "001" => ret := ahbdrivedata(hdata(7*(AHBDW/8)-1 downto 6*(AHBDW/8)));
when "010" => ret := ahbdrivedata(hdata(6*(AHBDW/8)-1 downto 5*(AHBDW/8)));
when "011" => ret := ahbdrivedata(hdata(5*(AHBDW/8)-1 downto 4*(AHBDW/8)));
when "100" => ret := ahbdrivedata(hdata(4*(AHBDW/8)-1 downto 3*(AHBDW/8)));
when "101" => ret := ahbdrivedata(hdata(3*(AHBDW/8)-1 downto 2*(AHBDW/8)));
when "110" => ret := ahbdrivedata(hdata(2*(AHBDW/8)-1 downto 1*(AHBDW/8)));
when others => ret := ahbdrivedata(hdata(1*(AHBDW/8)-1 downto 0*(AHBDW/8)));
end case;
elsif AHBDW = 128 then
case haddr(3 downto 2) is
when "00" => ret := ahbdrivedata(hdata(4*(AHBDW/4)-1 downto 3*(AHBDW/4)));
when "01" => ret := ahbdrivedata(hdata(3*(AHBDW/4)-1 downto 2*(AHBDW/4)));
when "10" => ret := ahbdrivedata(hdata(2*(AHBDW/4)-1 downto 1*(AHBDW/4)));
when others => ret := ahbdrivedata(hdata(1*(AHBDW/4)-1 downto 0*(AHBDW/4)));
end case;
elsif AHBDW = 64 then
if haddr(2) = '0' then ret := ahbdrivedata(hdata(AHBDW-1 downto AHBDW/2));
else ret := ahbdrivedata(hdata(AHBDW/2-1 downto 0)); end if;
else
ret := hdata;
end if;
end case;
return ret;
end ahbselectdata;
-- Description of ahbread* functions and procedures.
--
-- The ahbread* subprograms with an 'haddr' input selects the valid slice of
-- data from the AHB data vector, 'hdata', based on the 'haddr' input if
-- CORE_ACDM is set to 1 (see top of this package). Otherwise the low part of
-- the AHB data vector will be returned.
--
-- The ahbread* subprograms that do not have a 'haddr' input will always
-- return the low slice of the 'hdata' input. These subprograms will assert a
-- failure if CORE_ACDM is set to 1.
--
function ahbreadword (
hdata : std_logic_vector(AHBDW-1 downto 0);
haddr : std_logic_vector(4 downto 2))
return std_logic_vector is
variable data : std_logic_vector(31 downto 0);
begin
if CORE_ACDM = 1 then data := ahbselectdata(hdata, haddr, HSIZE_WORD)(31 downto 0);
else data := hdata(31 downto 0); end if;
return data;
end ahbreadword;
procedure ahbreadword (
hdata : in std_logic_vector(AHBDW-1 downto 0);
haddr : in std_logic_vector(4 downto 2);
data : out std_logic_vector(31 downto 0)) is
begin
data := ahbreadword(hdata, haddr);
end ahbreadword;
function ahbreadword (
hdata : std_logic_vector(AHBDW-1 downto 0))
return std_logic_vector is
variable data : std_logic_vector(31 downto 0);
begin
-- pragma translate_off
assert CORE_ACDM = 0
report "ahbreadword without address input used when CORE_ACDM /= 0"
severity failure;
-- pragma translate_on
data := hdata(31 downto 0);
return data;
end ahbreadword;
procedure ahbreadword (
hdata : in std_logic_vector(AHBDW-1 downto 0);
data : out std_logic_vector(31 downto 0)) is
begin
data := ahbreadword(hdata);
end ahbreadword;
function ahbreaddword (
hdata : std_logic_vector(AHBDW-1 downto 0);
haddr : std_logic_vector(4 downto 2))
return std_logic_vector is
variable data : std_logic_vector(255 downto 0);
begin
-- pragma translate_off
assert AHBDW > 32
report "ahbreaddword can not be used in system with AHB data width < 64"
severity failure;
-- pragma translate_on
if AHBDW = 256 then
if CORE_ACDM = 1 then
data(AHBDW/4-1 downto 0) :=
ahbselectdata(hdata, haddr, HSIZE_DWORD)(AHBDW/4-1 downto 0);
else
data(AHBDW/4-1 downto 0) := hdata(AHBDW/4-1 downto 0);
end if;
elsif AHBDW = 128 then
if CORE_ACDM = 1 then
data(AHBDW/2-1 downto 0) :=
ahbselectdata(hdata, haddr, HSIZE_DWORD)(AHBDW/2-1 downto 0);
else
data(AHBDW/2-1 downto 0) := hdata(AHBDW/2-1 downto 0);
end if;
elsif AHBDW = 64 then
if CORE_ACDM = 1 then
data(AHBDW-1 downto 0) :=
ahbselectdata(hdata, haddr, HSIZE_DWORD)(AHBDW-1 downto 0);
else
data(AHBDW-1 downto 0) := hdata(AHBDW-1 downto 0);
end if;
end if;
return data(63 downto 0);
end ahbreaddword;
procedure ahbreaddword (
hdata : in std_logic_vector(AHBDW-1 downto 0);
haddr : in std_logic_vector(4 downto 2);
data : out std_logic_vector(63 downto 0)) is
begin
data := ahbreaddword(hdata, haddr);
end ahbreaddword;
function ahbreaddword (
hdata : std_logic_vector(AHBDW-1 downto 0))
return std_logic_vector is
variable data : std_logic_vector(255 downto 0);
begin
-- pragma translate_off
assert AHBDW > 32
report "ahbreaddword can not be used in system with AHB data width < 64"
severity failure;
assert CORE_ACDM = 0
report "ahbreaddword without address input used when CORE_ACDM /= 0"
severity failure;
-- pragma translate_on
if AHBDW = 256 then
data(AHBDW/4-1 downto 0) := hdata(AHBDW/4-1 downto 0);
elsif AHBDW = 128 then
data(AHBDW/2-1 downto 0) := hdata(AHBDW/2-1 downto 0);
elsif AHBDW = 64 then
data(AHBDW-1 downto 0) := hdata(AHBDW-1 downto 0);
end if;
return data(63 downto 0);
end ahbreaddword;
procedure ahbreaddword (
hdata : in std_logic_vector(AHBDW-1 downto 0);
data : out std_logic_vector(63 downto 0)) is
begin
data := ahbreaddword(hdata);
end ahbreaddword;
function ahbread4word (
hdata : std_logic_vector(AHBDW-1 downto 0);
haddr : std_logic_vector(4 downto 2))
return std_logic_vector is
variable data : std_logic_vector(255 downto 0);
begin
-- pragma translate_off
assert AHBDW > 64
report "ahbread4word can not be used in system with AHB data width < 128 bits"
severity failure;
-- pragma translate_on
if AHBDW = 256 then
if CORE_ACDM = 1 then
data(AHBDW/2-1 downto 0) :=
ahbselectdata(hdata, haddr, HSIZE_4WORD)(AHBDW/2-1 downto 0);
else
data(AHBDW/2-1 downto 0) := hdata(AHBDW/2-1 downto 0);
end if;
elsif AHBDW = 128 then
if CORE_ACDM = 1 then
data(AHBDW-1 downto 0) :=
ahbselectdata(hdata, haddr, HSIZE_4WORD)(AHBDW-1 downto 0);
else
data(AHBDW-1 downto 0) := hdata(AHBDW-1 downto 0);
end if;
end if;
return data(127 downto 0);
end ahbread4word;
procedure ahbread4word (
hdata : in std_logic_vector(AHBDW-1 downto 0);
haddr : in std_logic_vector(4 downto 2);
data : out std_logic_vector(127 downto 0)) is
begin
data := ahbread4word(hdata, haddr);
end ahbread4word;
function ahbread4word (
hdata : std_logic_vector(AHBDW-1 downto 0))
return std_logic_vector is
variable data : std_logic_vector(255 downto 0);
begin
-- pragma translate_off
assert AHBDW > 64
report "ahbread4word can not be used in system with AHB data width < 128 bits"
severity failure;
assert CORE_ACDM = 0
report "ahbread4word without address input used when CORE_ACDM /= 0"
severity failure;
-- pragma translate_on
if AHBDW = 256 then
data(AHBDW/2-1 downto 0) := hdata(AHBDW/2-1 downto 0);
elsif AHBDW = 128 then
data(AHBDW-1 downto 0) := hdata(AHBDW-1 downto 0);
end if;
return data(127 downto 0);
end ahbread4word;
procedure ahbread4word (
hdata : in std_logic_vector(AHBDW-1 downto 0);
data : out std_logic_vector(127 downto 0)) is
begin
data := ahbread4word(hdata);
end ahbread4word;
function ahbread8word (
hdata : std_logic_vector(AHBDW-1 downto 0);
haddr : std_logic_vector(4 downto 2))
return std_logic_vector is
variable data : std_logic_vector(AHBDW-1 downto 0);
begin
-- pragma translate_off
assert AHBDW > 128
report "ahbread8word can not be used in system with AHB data width < 256 bits"
severity failure;
-- pragma translate_on
if CORE_ACDM = 1 then
data(AHBDW-1 downto 0) := ahbselectdata(hdata, haddr, HSIZE_8WORD)(AHBDW-1 downto 0);
else
data(AHBDW-1 downto 0) := hdata(AHBDW-1 downto 0);
end if;
return data;
end ahbread8word;
procedure ahbread8word (
hdata : in std_logic_vector(AHBDW-1 downto 0);
haddr : in std_logic_vector(4 downto 2);
data : out std_logic_vector(255 downto 0)) is
begin
data := ahbread8word(hdata, haddr);
end ahbread8word;
function ahbread8word (
hdata : std_logic_vector(AHBDW-1 downto 0))
return std_logic_vector is
variable data : std_logic_vector(AHBDW-1 downto 0);
begin
-- pragma translate_off
assert AHBDW > 128
report "ahbread8word can not be used in system with AHB data width < 256 bits"
severity failure;
assert CORE_ACDM = 0
report "ahbread8word without address input used when CORE_ACDM /= 0"
severity failure;
-- pragma translate_on
data(AHBDW-1 downto 0) := hdata(AHBDW-1 downto 0);
return data;
end ahbread8word;
procedure ahbread8word (
hdata : in std_logic_vector(AHBDW-1 downto 0);
data : out std_logic_vector(255 downto 0)) is
begin
data := ahbread8word(hdata);
end ahbread8word;
function ahbreaddata (
hdata : std_logic_vector(AHBDW-1 downto 0);
haddr : std_logic_vector(4 downto 2);
hsize : std_logic_vector(2 downto 0))
return std_logic_vector is
begin
case hsize is
when HSIZE_8WORD =>
return ahbread8word(hdata, haddr);
when HSIZE_4WORD =>
return ahbread4word(hdata, haddr);
when HSIZE_DWORD =>
return ahbreaddword(hdata, haddr);
when others => null;
end case;
return ahbreadword(hdata, haddr);
end ahbreaddata;
function ahbreaddata (
hdata : std_logic_vector(AHBDW-1 downto 0);
hsize : std_logic_vector(2 downto 0))
return std_logic_vector is
begin
case hsize is
when HSIZE_8WORD =>
return ahbread8word(hdata);
when HSIZE_4WORD =>
return ahbread4word(hdata);
when HSIZE_DWORD =>
return ahbreaddword(hdata);
when others => null;
end case;
return ahbreadword(hdata);
end ahbreaddata;
-- a*mux below drives their amba output records with the amba input record if
-- the en input is '1'. Otherwise the amba output record is driven to an idle
-- state. Plug'n'play information is kept constant.
procedure ahbmomux (
signal ai : in ahb_mst_out_type;
signal ao : out ahb_mst_out_type;
signal en : in std_ulogic) is
begin
if en = '1' then ao <= ai;
else ao <= ahbm_none; end if;
ao.hconfig <= ai.hconfig;
ao.hindex <= ai.hindex;
end ahbmomux;
procedure ahbsomux (
signal ai : in ahb_slv_out_type;
signal ao : out ahb_slv_out_type;
signal en : in std_ulogic) is
begin
if en = '1' then ao <= ai;
else ao <= ahbs_none; end if;
ao.hconfig <= ai.hconfig;
ao.hindex <= ai.hindex;
end ahbsomux;
procedure apbsomux (
signal ai : in apb_slv_out_type;
signal ao : out apb_slv_out_type;
signal en : in std_ulogic) is
begin
if en = '1' then ao <= ai;
else ao <= apb_none; end if;
ao.pconfig <= ai.pconfig;
ao.pindex <= ai.pindex;
end apbsomux;
end;