DR1V90 is a FPSoC from Anlogic, which features a RISC-V core as the PS
part and 94,464 LUTs for the PL part.
The PS part integrates a Nuclei UX900 RISC-V core with 32KB L1 icache
and 32KB L1 dcache. It also provides two "snps,dw-apb-uart" compatible
UART controllers.
Currently, a "no4lvl" bootarg is required to force the kernel to use
3-level paging for successful boot. The DR1V90 hangs if SATP is set to
4/5-level paging modes during early boot, as detected in
set_satp_mode().
Some basic information of the processor can be obtained by running a
simple application from nuclei-sdk [1]:
-----Nuclei RISC-V CPU Configuration Information-----
MARCHID: 0xc900
MIMPID: 0x20300
ISA: RV64 A B C D F I M P S U
MCFG: TEE ECC ECLIC PLIC PPI ILM DLM ICACHE DCACHE IREGION No-Safety-Mechanism DLEN=VLEN/2
ILM: 256 KB has-ecc
DLM: 256 KB has-ecc
ICACHE: 32 KB(set=256,way=2,lsize=64,ecc=1)
DCACHE: 32 KB(set=256,way=2,lsize=64,ecc=1)
TLB: MainTLB(set=32,way=2,entry=1,ecc=1) ITLB(entry=8) DTLB(entry=8)
IREGION: 0x68000000 128 MB
Unit Size Address
INFO 64KB 0x68000000
DEBUG 64KB 0x68010000
ECLIC 64KB 0x68020000
TIMER 64KB 0x68030000
PLIC 64MB 0x6c000000
INFO-Detail:
mpasize : 0
PPI: 0xf8000000 128 MB
-----End of Nuclei CPU INFO-----
Link: https://github.com/Nuclei-Software/nuclei-sdk/blob/master/application/baremetal/cpuinfo/main.c [1]
Signed-off-by: Junhui Liu <junhui.liu@pigmoral.tech>
---
arch/riscv/boot/dts/anlogic/dr1v90.dtsi | 86 +++++++++++++++++++++++++++++++++
1 file changed, 86 insertions(+)
diff --git a/arch/riscv/boot/dts/anlogic/dr1v90.dtsi b/arch/riscv/boot/dts/anlogic/dr1v90.dtsi
new file mode 100644
index 0000000000000000000000000000000000000000..e1e3f6b72e56abce5a35e6d7571c91a64b0fecff
--- /dev/null
+++ b/arch/riscv/boot/dts/anlogic/dr1v90.dtsi
@@ -0,0 +1,86 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2025 Junhui Liu <junhui.liu@pigmoral.tech>
+ */
+
+/dts-v1/;
+/ {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ model = "Anlogic DR1V90";
+ compatible = "anlogic,dr1v90";
+
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ timebase-frequency = <800000000>;
+
+ cpu@0 {
+ compatible = "nuclei,ux900", "riscv";
+ device_type = "cpu";
+ reg = <0>;
+ riscv,isa = "rv64imafdc";
+ riscv,isa-base = "rv64i";
+ riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "zba", "zbb", "zbc",
+ "zbkc", "zbs", "zicntr", "zicsr", "zifencei",
+ "zihintpause", "zihpm";
+ i-cache-block-size = <64>;
+ i-cache-size = <32768>;
+ i-cache-sets = <256>;
+ d-cache-block-size = <64>;
+ d-cache-size = <32768>;
+ d-cache-sets = <256>;
+ mmu-type = "riscv,sv39";
+
+ cpu0_intc: interrupt-controller {
+ compatible = "riscv,cpu-intc";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
+ };
+ };
+
+ soc {
+ compatible = "simple-bus";
+ interrupt-parent = <&plic>;
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ clint: timer@68030000 {
+ compatible = "anlogic,dr1v90-clint", "sifive,clint0";
+ reg = <0x0 0x68030000 0x0 0x10000>;
+ interrupts-extended = <&cpu0_intc 3>, <&cpu0_intc 7>;
+ };
+
+ plic: interrupt-controller@6c000000 {
+ compatible = "anlogic,dr1v90-plic", "sifive,plic-1.0.0";
+ reg = <0x0 0x6c000000 0x0 0x4000000>;
+ interrupts-extended = <&cpu0_intc 11>, <&cpu0_intc 9>;
+ interrupt-controller;
+ #address-cells = <0>;
+ #interrupt-cells = <1>;
+ riscv,ndev = <150>;
+ };
+
+ uart0: serial@f8400000 {
+ compatible = "anlogic,dr1v90-uart", "snps,dw-apb-uart";
+ reg = <0x0 0xf8400000 0x0 0x1000>;
+ interrupts = <71>;
+ clock-frequency = <50000000>;
+ reg-shift = <2>;
+ reg-io-width = <4>;
+ status = "disabled";
+ };
+
+ uart1: serial@f8401000 {
+ compatible = "anlogic,dr1v90-uart", "snps,dw-apb-uart";
+ reg = <0x0 0xf8401000 0x0 0x1000>;
+ interrupts = <72>;
+ clock-frequency = <50000000>;
+ reg-shift = <2>;
+ reg-io-width = <4>;
+ status = "disabled";
+ };
+ };
+};
--
2.50.1