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scripts/adi_ip.pl: Infer register map range from address width 

Currently the register map range of a peripheral is hardcoded to 64k. Not
all peripherals need that much space though and reducing the size of the
address can reduce the amount of logic required, both in the interconnect
as well as in the peripheral.

Let adi_ip_properties() infer the size of the register map from the number
of bits of the address when creating the register map.

For backwards compatibility limit the register map size to 64k since
currently peripherals have a address width of 32 bits, event if they use
less.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
main
Lars-Peter Clausen 2017-03-24 18:25:47 +01:00
parent 77399ec7aa
commit 9f382d56c6
1 changed files with 16 additions and 1 deletions
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17
library/scripts/adi_ip.tcl
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@ -241,10 +241,25 @@ proc adi_ip_properties {ip_name} {
ipx::infer_bus_interface s_axi_aclk xilinx.com:signal:clock_rtl:1.0 [ipx::current_core]
ipx::infer_bus_interface s_axi_aresetn xilinx.com:signal:reset_rtl:1.0 [ipx::current_core]
set raddr_width [expr [get_property SIZE_LEFT [ipx::get_ports -nocase true s_axi_araddr -of_objects [ipx::current_core]]] + 1]
set waddr_width [expr [get_property SIZE_LEFT [ipx::get_ports -nocase true s_axi_awaddr -of_objects [ipx::current_core]]] + 1]
if {$raddr_width != $waddr_width} {
puts [format "WARNING: AXI address width mismatch for %s (r=%d, w=%d)" $ip_name $raddr_width, $waddr_width]
set range 65536
} else {
if {$raddr_width >= 16} {
set range 65536
} else {
set range [expr 1 << $raddr_width]
}
}
ipx::add_memory_map {s_axi} [ipx::current_core]
set_property slave_memory_map_ref {s_axi} [ipx::get_bus_interfaces s_axi -of_objects [ipx::current_core]]
ipx::add_address_block {axi_lite} [ipx::get_memory_maps s_axi -of_objects [ipx::current_core]]
set_property range {65536} [ipx::get_address_blocks axi_lite \
set_property range $range [ipx::get_address_blocks axi_lite \
-of_objects [ipx::get_memory_maps s_axi -of_objects [ipx::current_core]]]
ipx::add_bus_parameter ASSOCIATED_BUSIF [ipx::get_bus_interfaces s_axi_aclk \
-of_objects [ipx::current_core]]