Merge branch 'next'

Merge all outstanding changes from the current next branch in now that
we have released.

16 files changed, 801 insertions, 103 deletions

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index ff8a9f8ddc..009a545fcf 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -20,6 +20,9 @@ config TARGET_QEMU_VIRT
 config TARGET_SIFIVE_FU540
 	bool "Support SiFive FU540 Board"
 
+config TARGET_SIPEED_MAIX
+	bool "Support Sipeed Maix Board"
+
 endchoice
 
 config SYS_ICACHE_OFF
@@ -53,6 +56,7 @@ source "board/AndesTech/ax25-ae350/Kconfig"
 source "board/emulation/qemu-riscv/Kconfig"
 source "board/microchip/mpfs_icicle/Kconfig"
 source "board/sifive/fu540/Kconfig"
+source "board/sipeed/maix/Kconfig"
 
 # platform-specific options below
 source "arch/riscv/cpu/ax25/Kconfig"
@@ -269,6 +273,16 @@ config XIP
 config SHOW_REGS
 	bool "Show registers on unhandled exception"
 
+config RISCV_PRIV_1_9
+	bool "Use version 1.9 of the RISC-V priviledged specification"
+	help
+	  Older versions of the RISC-V priviledged specification had
+	  separate counter enable CSRs for each privilege mode. Writing
+	  to the unified mcounteren CSR on a processor implementing the
+	  old specification will result in an illegal instruction
+	  exception. In addition to counter CSR changes, the way virtual
+	  memory is configured was also changed.
+
 config STACK_SIZE_SHIFT
 	int
 	default 14
diff --git a/arch/riscv/cpu/cpu.c b/arch/riscv/cpu/cpu.c
index 5804aa8e73..bbd6c15352 100644
--- a/arch/riscv/cpu/cpu.c
+++ b/arch/riscv/cpu/cpu.c
@@ -91,13 +91,28 @@ int arch_cpu_init_dm(void)
 		 * Enable perf counters for cycle, time,
 		 * and instret counters only
 		 */
+#ifdef CONFIG_RISCV_PRIV_1_9
+		csr_write(CSR_MSCOUNTEREN, GENMASK(2, 0));
+		csr_write(CSR_MUCOUNTEREN, GENMASK(2, 0));
+#else
 		csr_write(CSR_MCOUNTEREN, GENMASK(2, 0));
+#endif
 
 		/* Disable paging */
 		if (supports_extension('s'))
+#ifdef CONFIG_RISCV_PRIV_1_9
+			csr_read_clear(CSR_MSTATUS, SR_VM);
+#else
 			csr_write(CSR_SATP, 0);
+#endif
 	}
 
+#ifdef CONFIG_SMP
+	ret = riscv_init_ipi();
+	if (ret)
+		return ret;
+#endif
+
 	return 0;
 }
 
diff --git a/arch/riscv/cpu/start.S b/arch/riscv/cpu/start.S
index 5f1c220e0c..f408e41ab9 100644
--- a/arch/riscv/cpu/start.S
+++ b/arch/riscv/cpu/start.S
@@ -65,6 +65,8 @@ _start:
 #else
 	li	t0, SIE_SSIE
 #endif
+	/* Clear any pending IPIs */
+	csrc	MODE_PREFIX(ip), t0
 	csrs	MODE_PREFIX(ie), t0
 #endif
 
diff --git a/arch/riscv/dts/Makefile b/arch/riscv/dts/Makefile
index 4f30e6936f..3a6f96c67d 100644
--- a/arch/riscv/dts/Makefile
+++ b/arch/riscv/dts/Makefile
@@ -2,6 +2,7 @@
 
 dtb-$(CONFIG_TARGET_AX25_AE350) += ae350_32.dtb ae350_64.dtb
 dtb-$(CONFIG_TARGET_SIFIVE_FU540) += hifive-unleashed-a00.dtb
+dtb-$(CONFIG_TARGET_SIPEED_MAIX) += k210-maix-bit.dtb
 
 targets += $(dtb-y)
 
diff --git a/arch/riscv/dts/hifive-unleashed-a00-u-boot.dtsi b/arch/riscv/dts/hifive-unleashed-a00-u-boot.dtsi
index 303806454b..e037150520 100644
--- a/arch/riscv/dts/hifive-unleashed-a00-u-boot.dtsi
+++ b/arch/riscv/dts/hifive-unleashed-a00-u-boot.dtsi
@@ -8,6 +8,10 @@
 
 / {
 	aliases {
+		cpu1 = &cpu1;
+		cpu2 = &cpu2;
+		cpu3 = &cpu3;
+		cpu4 = &cpu4;
 		spi0 = &qspi0;
 		spi2 = &qspi2;
 	};
diff --git a/arch/riscv/dts/k210-maix-bit.dts b/arch/riscv/dts/k210-maix-bit.dts
new file mode 100644
index 0000000000..5b32c5fd5f
--- /dev/null
+++ b/arch/riscv/dts/k210-maix-bit.dts
@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019-20 Sean Anderson <seanga2@gmail.com>
+ */
+
+/dts-v1/;
+
+#include "k210.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+	model = "Sipeed Maix Bit 2.0";
+	compatible = "sipeed,maix-bitm", "sipeed,maix-bit", "kendryte,k210";
+
+	chosen {
+		stdout-path = "serial0:115200";
+	};
+
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,format = "i2s";
+		status = "disabled";
+
+		simple-audio-card,cpu {
+			sound-dai = <&i2s0 0>;
+		};
+
+		simple-audio-card,codec {
+			sound-dai = <&mic>;
+		};
+	};
+
+	mic: mic {
+		#sound-dai-cells = <0>;
+		compatible = "memsensing,msm61s4030h0";
+		status = "disabled";
+	};
+};
+
+&uarths0 {
+	status = "okay";
+};
+
+&i2s0 {
+	#sound-dai-cells = <1>;
+};
diff --git a/arch/riscv/dts/k210.dtsi b/arch/riscv/dts/k210.dtsi
new file mode 100644
index 0000000000..2546c7d4e0
--- /dev/null
+++ b/arch/riscv/dts/k210.dtsi
@@ -0,0 +1,594 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019-20 Sean Anderson <seanga2@gmail.com>
+ */
+
+#include <dt-bindings/clock/k210-sysctl.h>
+#include <dt-bindings/mfd/k210-sysctl.h>
+#include <dt-bindings/reset/k210-sysctl.h>
+
+/ {
+	/*
+	 * Although the K210 is a 64-bit CPU, the address bus is only 32-bits
+	 * wide, and the upper half of all addresses is ignored.
+	 */
+	#address-cells = <1>;
+	#size-cells = <1>;
+	compatible = "kendryte,k210";
+
+	aliases {
+		dma0 = &dmac0;
+		gpio0 = &gpio0;
+		gpio1 = &gpio1_0;
+		i2c0 = &i2c0;
+		i2c1 = &i2c1;
+		i2c2 = &i2c2;
+		pinctrl0 = &fpioa;
+		serial0 = &uarths0;
+		serial1 = &uart1;
+		serial2 = &uart2;
+		serial3 = &uart3;
+		spi0 = &spi0;
+		spi1 = &spi1;
+		spi2 = &spi2;
+		spi3 = &spi3;
+		timer0 = &timer0;
+		timer1 = &timer1;
+		timer2 = &timer2;
+	};
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		timebase-frequency = <7800000>;
+		cpu0: cpu@0 {
+			device_type = "cpu";
+			compatible = "kendryte,k210", "sifive,rocket0", "riscv";
+			reg = <0>;
+			riscv,isa = "rv64imafdgc";
+			mmu-type = "sv39";
+			i-cache-block-size = <64>;
+			i-cache-size = <0x8000>;
+			d-cache-block-size = <64>;
+			d-cache-size = <0x8000>;
+			clocks = <&sysclk K210_CLK_CPU>;
+			cpu0_intc: interrupt-controller {
+				#interrupt-cells = <1>;
+				interrupt-controller;
+				compatible = "riscv,cpu-intc";
+			};
+		};
+		cpu1: cpu@1 {
+			device_type = "cpu";
+			compatible = "kendryte,k210", "sifive,rocket0", "riscv";
+			reg = <1>;
+			riscv,isa = "rv64imafdgc";
+			mmu-type = "sv39";
+			i-cache-block-size = <64>;
+			i-cache-size = <0x8000>;
+			d-cache-block-size = <64>;
+			d-cache-size = <0x8000>;
+			clocks = <&sysclk K210_CLK_CPU>;
+			cpu1_intc: interrupt-controller {
+				#interrupt-cells = <1>;
+				interrupt-controller;
+				compatible = "riscv,cpu-intc";
+			};
+		};
+	};
+
+	sram: memory@80000000 {
+		device_type = "memory";
+		compatible = "kendryte,k210-sram";
+		reg = <0x80000000 0x400000>,
+		      <0x80400000 0x200000>,
+		      <0x80600000 0x200000>;
+		reg-names = "sram0", "sram1", "airam";
+		clocks = <&sysclk K210_CLK_SRAM0>,
+			 <&sysclk K210_CLK_SRAM1>,
+			 <&sysclk K210_CLK_PLL1>;
+		clock-names = "sram0", "sram1", "airam";
+	};
+
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		ai_reserved: ai@80600000 {
+			reg = <0x80600000 0x200000>;
+			reusable;
+		};
+	};
+
+	clocks {
+		in0: osc {
+			compatible = "fixed-clock";
+			#clock-cells = <0>;
+			clock-frequency = <26000000>;
+		};
+	};
+
+	soc {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "kendryte,k210-soc", "simple-bus";
+		ranges;
+		interrupt-parent = <&plic0>;
+
+		debug0: debug@0 {
+			compatible = "kendryte,k210-debug", "riscv,debug";
+			reg = <0x0 0x1000>;
+		};
+
+		rom0: nvmem@1000 {
+			reg = <0x1000 0x1000>;
+			read-only;
+		};
+
+		clint0: interrupt-controller@2000000 {
+			#interrupt-cells = <1>;
+			compatible = "kendryte,k210-clint", "riscv,clint0";
+			reg = <0x2000000 0xC000>;
+			interrupt-controller;
+			interrupts-extended = <&cpu0_intc 3>, <&cpu0_intc 7>,
+					      <&cpu1_intc 3>, <&cpu1_intc 7>;
+			clocks = <&sysclk K210_CLK_CPU>;
+		};
+
+		plic0: interrupt-controller@C000000 {
+			#interrupt-cells = <1>;
+			compatible = "kendryte,k210-plic", "riscv,plic0";
+			reg = <0xC000000 0x4000000>;
+			interrupt-controller;
+			interrupts-extended = <&cpu0_intc 9>, <&cpu0_intc 11>,
+					      <&cpu1_intc 9>, <&cpu1_intc 11>;
+			riscv,ndev = <65>;
+			riscv,max-priority = <7>;
+		};
+
+		uarths0: serial@38000000 {
+			compatible = "kendryte,k210-uarths", "sifive,uart0";
+			reg = <0x38000000 0x1000>;
+			interrupts = <33>;
+			clocks = <&sysclk K210_CLK_CPU>;
+			status = "disabled";
+		};
+
+		gpio0: gpio-controller@38001000 {
+			#interrupt-cells = <2>;
+			#gpio-cells = <2>;
+			compatible = "kendryte,k210-gpiohs", "sifive,gpio0";
+			reg = <0x38001000 0x1000>;
+			interrupt-controller;
+			interrupts = <34 35 36 37 38 39 40 41
+				      42 43 44 45 46 47 48 49
+				      50 51 52 53 54 55 56 57
+				      58 59 60 61 62 63 64 65>;
+			gpio-controller;
+			ngpios = <32>;
+			status = "disabled";
+		};
+
+		kpu0: kpu@40800000 {
+			compatible = "kendryte,k210-kpu";
+			reg = <0x40800000 0xc00000>;
+			interrupts = <25>;
+			clocks = <&sysclk K210_CLK_AI>;
+			memory-region = <&ai_reserved>;
+			status = "disabled";
+		};
+
+		fft0: fft@42000000 {
+			compatible = "kendryte,k210-fft";
+			reg = <0x42000000 0x400000>;
+			interrupts = <26>;
+			clocks = <&sysclk K210_CLK_FFT>;
+			resets = <&sysrst K210_RST_FFT>;
+			status = "disabled";
+		};
+
+		dmac0: dma-controller@50000000 {
+			compatible = "kendryte,k210-dmac", "snps,axi-dma-1.01a";
+			reg = <0x50000000 0x1000>;
+			interrupts = <27 28 29 30 31 32>;
+			clocks = <&sysclk K210_CLK_DMA>, <&sysclk K210_CLK_DMA>;
+			clock-names = "core-clk", "cfgr-clk";
+			resets = <&sysrst K210_RST_DMA>;
+			dma-channels = <6>;
+			snps,dma-masters = <2>;
+			snps,data-width = <5>;
+			snps,block-size = <0x400000 0x400000 0x400000
+					   0x400000 0x400000 0x400000>;
+			snps,axi-max-burst-len = <256>;
+			status = "disabled";
+		};
+
+		apb0: bus@50200000 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "kendryte,k210-apb", "simple-pm-bus";
+			ranges;
+			clocks = <&sysclk K210_CLK_APB0>;
+
+			gpio1: gpio-controller@50200000 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				compatible = "kendryte,k210-gpio",
+					     "snps,dw-apb-gpio";
+				reg = <0x50200000 0x80>;
+				clocks = <&sysclk K210_CLK_GPIO>;
+				resets = <&sysrst K210_RST_GPIO>;
+				status = "disabled";
+
+				gpio1_0: gpio1@0 {
+					#gpio-cells = <2>;
+					#interrupt-cells = <2>;
+					compatible = "snps,dw-apb-gpio-port";
+					reg = <0>;
+					interrupt-controller;
+					interrupts = <23>;
+					gpio-controller;
+					snps,nr-gpios = <8>;
+				};
+			};
+
+			uart1: serial@50210000 {
+				compatible = "kendryte,k210-uart",
+					     "snps,dw-apb-uart";
+				reg = <0x50210000 0x100>;
+				interrupts = <11>;
+				clocks = <&sysclk K210_CLK_UART1>;
+				resets = <&sysrst K210_RST_UART1>;
+				reg-io-width = <4>;
+				reg-shift = <2>;
+				dcd-override;
+				dsr-override;
+				cts-override;
+				ri-override;
+				status = "disabled";
+			};
+
+			uart2: serial@50220000 {
+				compatible = "kendryte,k210-uart",
+					     "snps,dw-apb-uart";
+				reg = <0x50220000 0x100>;
+				interrupts = <12>;
+				clocks = <&sysclk K210_CLK_UART2>;
+				resets = <&sysrst K210_RST_UART2>;
+				reg-io-width = <4>;
+				reg-shift = <2>;
+				dcd-override;
+				dsr-override;
+				cts-override;
+				ri-override;
+				status = "disabled";
+			};
+
+			uart3: serial@50230000 {
+				compatible = "kendryte,k210-uart",
+					     "snps,dw-apb-uart";
+				reg = <0x50230000 0x100>;
+				interrupts = <13>;
+				clocks = <&sysclk K210_CLK_UART3>;
+				resets = <&sysrst K210_RST_UART3>;
+				reg-io-width = <4>;
+				reg-shift = <2>;
+				dcd-override;
+				dsr-override;
+				cts-override;
+				ri-override;
+				status = "disabled";
+			};
+
+			spi2: spi@50240000 {
+				compatible = "kendryte,k120-spislave",
+					     "snps,dw-apb-ssi";
+				spi-slave;
+				reg = <0x50240000 0x100>;
+				interrupts = <2>;
+				clocks = <&sysclk K210_CLK_SPI2>;
+				resets = <&sysrst K210_RST_SPI2>;
+				spi-max-frequency = <25000000>;
+				status = "disabled";
+			};
+
+			i2s0: i2s@50250000 {
+				compatible = "kendryte,k210-i2s",
+					     "snps,designware-i2s";
+				reg = <0x50250000 0x200>;
+				interrupts = <5>;
+				clocks = <&sysclk K210_CLK_I2S0>;
+				clock-names = "i2sclk";
+				resets = <&sysrst K210_RST_I2S0>;
+				status = "disabled";
+			};
+
+			apu0: sound@520250200 {
+				compatible = "kendryte,k210-apu";
+				reg = <0x50250200 0x200>;
+				status = "disabled";
+			};
+
+			i2s1: i2s@50260000 {
+				compatible = "kendryte,k210-i2s",
+					     "snps,designware-i2s";
+				reg = <0x50260000 0x200>;
+				interrupts = <6>;
+				clocks = <&sysclk K210_CLK_I2S1>;
+				clock-names = "i2sclk";
+				resets = <&sysrst K210_RST_I2S1>;
+				status = "disabled";
+			};
+
+			i2s2: i2s@50270000 {
+				compatible = "kendryte,k210-i2s",
+					     "snps,designware-i2s";
+				reg = <0x50270000 0x200>;
+				interrupts = <7>;
+				clocks = <&sysclk K210_CLK_I2S2>;
+				clock-names = "i2sclk";
+				resets = <&sysrst K210_RST_I2S2>;
+				status = "disabled";
+			};
+
+			i2c0: i2c@50280000 {
+				compatible = "kendryte,k210-i2c",
+					     "snps,designware-i2c";
+				reg = <0x50280000 0x100>;
+				interrupts = <8>;
+				clocks = <&sysclk K210_CLK_I2C0>;
+				resets = <&sysrst K210_RST_I2C0>;
+				status = "disabled";
+			};
+
+			i2c1: i2c@50290000 {
+				compatible = "kendryte,k210-i2c",
+					     "snps,designware-i2c";
+				reg = <0x50290000 0x100>;
+				interrupts = <9>;
+				clocks = <&sysclk K210_CLK_I2C1>;
+				resets = <&sysrst K210_RST_I2C1>;
+				status = "disabled";
+			};
+
+			i2c2: i2c@502A0000 {
+				compatible = "kendryte,k210-i2c",
+					     "snps,designware-i2c";
+				reg = <0x502A0000 0x100>;
+				interrupts = <10>;
+				clocks = <&sysclk K210_CLK_I2C2>;
+				resets = <&sysrst K210_RST_I2C2>;
+				status = "disabled";
+			};
+
+			fpioa: pinmux@502B0000 {
+				compatible = "kendryte,k210-fpioa";
+				reg = <0x502B0000 0x100>;
+				clocks = <&sysclk K210_CLK_FPIOA>;
+				resets = <&sysrst K210_RST_FPIOA>;
+				status = "disabled";
+			};
+
+			sha256: sha256@502C0000 {
+				compatible = "kendryte,k210-sha256";
+				reg = <0x502C0000 0x100>;
+				clocks = <&sysclk K210_CLK_SHA>;
+				resets = <&sysrst K210_RST_SHA>;
+				status = "disabled";
+			};
+
+			timer0: timer@502D0000 {
+				compatible = "kendryte,k210-timer",
+					     "snps,dw-apb-timer";
+				reg = <0x502D0000 0x100>;
+				interrupts = <14 15>;
+				clocks = <&sysclk K210_CLK_TIMER0>;
+				clock-names = "timer";
+				resets = <&sysrst K210_RST_TIMER0>;
+				status = "disabled";
+			};
+
+			timer1: timer@502E0000 {
+				compatible = "kendryte,k210-timer",
+					     "snps,dw-apb-timer";
+				reg = <0x502E0000 0x100>;
+				interrupts = <16 17>;
+				clocks = <&sysclk K210_CLK_TIMER1>;
+				clock-names = "timer";
+				resets = <&sysrst K210_RST_TIMER1>;
+				status = "disabled";
+			};
+
+			timer2: timer@502F0000 {
+				compatible = "kendryte,k210-timer",
+					     "snps,dw-apb-timer";
+				reg = <0x502F0000 0x100>;
+				interrupts = <18 19>;
+				clocks = <&sysclk K210_CLK_TIMER2>;
+				clock-names = "timer";
+				resets = <&sysrst K210_RST_TIMER2>;
+				status = "disabled";
+			};
+		};
+
+		apb1: bus@50400000 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "kendryte,k210-apb", "simple-pm-bus";
+			ranges;
+			clocks = <&sysclk K210_CLK_APB1>;
+
+			wdt0: watchdog@50400000 {
+				compatible = "kendryte,k210-wdt", "snps,dw-wdt";
+				reg = <0x50400000 0x100>;
+				interrupts = <21>;
+				clocks = <&sysclk K210_CLK_WDT0>;
+				resets = <&sysrst K210_RST_WDT0>;
+				status = "disabled";
+			};
+
+			wdt1: watchdog@50410000 {
+				compatible = "kendryte,k210-wdt", "snps,dw-wdt";
+				reg = <0x50410000 0x100>;
+				interrupts = <22>;
+				clocks = <&sysclk K210_CLK_WDT1>;
+				resets = <&sysrst K210_RST_WDT1>;
+				status = "disabled";
+			};
+
+			otp0: nvmem@50420000 {
+				#address-cells = <1>;
+				#size-cells = <1>;
+				compatible = "kendryte,k210-otp";
+				reg = <0x50420000 0x100>,
+				      <0x88000000 0x20000>;
+				reg-names = "reg", "mem";
+				clocks = <&sysclk K210_CLK_ROM>;
+				resets = <&sysrst K210_RST_ROM>;
+				read-only;
+				status = "disabled";
+
+				/* Bootloader */
+				firmware@00000 {
+					reg = <0x00000 0xC200>;
+				};
+
+				/*
+				 * config string as described in RISC-V
+				 * privileged spec 1.9
+				 */
+				config-1-9@1c000 {
+					reg = <0x1C000 0x1000>;
+				};
+
+				/*
+				 * Device tree containing only registers,
+				 * interrupts, and cpus
+				 */
+				fdt@1d000 {
+					reg = <0x1D000 0x2000>;
+				};
+
+				/* CPU/ROM credits */
+				credits@1f000 {
+					reg = <0x1F000 0x1000>;
+				};
+			};
+
+			dvp0: camera@50430000 {
+				compatible = "kendryte,k210-dvp";
+				reg = <0x50430000 0x100>;
+				interrupts = <24>;
+				clocks = <&sysclk K210_CLK_DVP>;
+				resets = <&sysrst K210_RST_DVP>;
+				status = "disabled";
+			};
+
+			sysctl: syscon@50440000 {
+				compatible = "kendryte,k210-sysctl",
+					     "syscon", "simple-mfd";
+				reg = <0x50440000 0x100>;
+				reg-io-width = <4>;
+
+				sysclk: clock-controller {
+					#clock-cells = <1>;
+					compatible = "kendryte,k210-clk";
+					clocks = <&in0>;
+				};
+
+				sysrst: reset-controller {
+					compatible = "kendryte,k210-rst",
+						     "syscon-reset";
+					#reset-cells = <1>;
+					regmap = <&sysctl>;
+					offset = <K210_SYSCTL_PERI_RESET>;
+					mask = <0x27FFFFFF>;
+					assert-high = <1>;
+				};
+
+				reboot {
+					compatible = "syscon-reboot";
+					regmap = <&sysctl>;
+					offset = <K210_SYSCTL_SOFT_RESET>;
+					mask = <1>;
+					value = <1>;
+				};
+			};
+
+			aes0: aes@50450000 {
+				compatible = "kendryte,k210-aes";
+				reg = <0x50450000 0x100>;
+				clocks = <&sysclk K210_CLK_AES>;
+				resets = <&sysrst K210_RST_AES>;
+				status = "disabled";
+			};
+
+			rtc: rtc@50460000 {
+				compatible = "kendryte,k210-rtc";
+				reg = <0x50460000 0x100>;
+				clocks = <&in0>;
+				resets = <&sysrst K210_RST_RTC>;
+				interrupts = <20>;
+				status = "disabled";
+			};
+		};
+
+		apb2: bus@52000000 {
+			#address-cells = <1>;
+			#size-cells = <1>;
+			compatible = "kendryte,k210-apb", "simple-pm-bus";
+			ranges;
+			clocks = <&sysclk K210_CLK_APB2>;
+
+			spi0: spi@52000000 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				compatible = "kendryte,k210-spi",
+					     "snps,dw-apb-ssi";
+				reg = <0x52000000 0x100>;
+				interrupts = <1>;
+				clocks = <&sysclk K210_CLK_SPI0>;
+				clock-names = "ssi_clk";
+				resets = <&sysrst K210_RST_SPI0>;
+				spi-max-frequency = <25000000>;
+				num-cs = <4>;
+				reg-io-width = <4>;
+				status = "disabled";
+			};
+
+			spi1: spi@53000000 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				compatible = "kendryte,k210-spi",
+					     "snps,dw-apb-ssi";
+				reg = <0x53000000 0x100>;
+				interrupts = <2>;
+				clocks = <&sysclk K210_CLK_SPI1>;
+				clock-names = "ssi_clk";
+				resets = <&sysrst K210_RST_SPI1>;
+				spi-max-frequency = <25000000>;
+				num-cs = <4>;
+				reg-io-width = <4>;
+				status = "disabled";
+			};
+
+			spi3: spi@54000000 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				compatible = "kendryte,k210-spi",
+					     "snps,dw-apb-ssi";
+				reg = <0x54000000 0x200>;
+				interrupts = <4>;
+				clocks = <&sysclk K210_CLK_SPI3>;
+				clock-names = "ssi_clk";
+				resets = <&sysrst K210_RST_SPI3>;
+				/* Could possibly go up to 200 MHz */
+				spi-max-frequency = <100000000>;
+				num-cs = <4>;
+				reg-io-width = <4>;
+				status = "disabled";
+			};
+		};
+	};
+};
diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h
index d1520743a2..1a15089cae 100644
--- a/arch/riscv/include/asm/csr.h
+++ b/arch/riscv/include/asm/csr.h
@@ -15,7 +15,11 @@
 #define SR_SIE		_AC(0x00000002, UL) /* Supervisor Interrupt Enable */
 #define SR_SPIE		_AC(0x00000020, UL) /* Previous Supervisor IE */
 #define SR_SPP		_AC(0x00000100, UL) /* Previously Supervisor */
+#ifdef CONFIG_RISCV_PRIV_1_9
+#define SR_PUM		_AC(0x00040000, UL) /* Protect User Memory Access */
+#else
 #define SR_SUM		_AC(0x00040000, UL) /* Supervisor User Memory Access */
+#endif
 
 #define SR_FS		_AC(0x00006000, UL) /* Floating-point Status */
 #define SR_FS_OFF	_AC(0x00000000, UL)
@@ -29,6 +33,22 @@
 #define SR_XS_CLEAN	_AC(0x00010000, UL)
 #define SR_XS_DIRTY	_AC(0x00018000, UL)
 
+#ifdef CONFIG_RISCV_PRIV_1_9
+#define SR_VM		_AC(0x1F000000, UL) /* Virtualization Management */
+#define SR_VM_MODE_BARE	_AC(0x00000000, UL) /* No translation or protection */
+#define SR_VM_MODE_BB	_AC(0x01000000, UL) /* Single base-and-bound */
+/* Separate instruction and data base-and-bound */
+#define SR_VM_MODE_BBID	_AC(0x02000000, UL)
+#ifndef CONFIG_64BIT
+#define SR_VM_MODE_32	_AC(0x08000000, UL)
+#define SR_VM_MODE	SR_VM_MODE_32
+#else
+#define SR_VM_MODE_39	_AC(0x09000000, UL)
+#define SR_VM_MODE_48	_AC(0x0A000000, UL)
+#define SR_VM_MODE	SR_VM_MODE_39
+#endif
+#endif
+
 #ifndef CONFIG_64BIT
 #define SR_SD		_AC(0x80000000, UL) /* FS/XS dirty */
 #else
@@ -36,6 +56,7 @@
 #endif
 
 /* SATP flags */
+#ifndef CONFIG_RISCV_PRIV_1_9
 #ifndef CONFIG_64BIT
 #define SATP_PPN	_AC(0x003FFFFF, UL)
 #define SATP_MODE_32	_AC(0x80000000, UL)
@@ -45,6 +66,7 @@
 #define SATP_MODE_39	_AC(0x8000000000000000, UL)
 #define SATP_MODE	SATP_MODE_39
 #endif
+#endif
 
 /* SCAUSE */
 #define SCAUSE_IRQ_FLAG		(_AC(1, UL) << (__riscv_xlen - 1))
@@ -88,17 +110,35 @@
 #define CSR_SCAUSE		0x142
 #define CSR_STVAL		0x143
 #define CSR_SIP			0x144
+#ifdef CONFIG_RISCV_PRIV_1_9
+#define CSR_SPTBR		0x180
+#else
 #define CSR_SATP		0x180
+#endif
 #define CSR_MSTATUS		0x300
 #define CSR_MISA		0x301
 #define CSR_MIE			0x304
 #define CSR_MTVEC		0x305
+#ifdef CONFIG_RISCV_PRIV_1_9
+#define CSR_MUCOUNTEREN         0x320
+#define CSR_MSCOUNTEREN         0x321
+#define CSR_MHCOUNTEREN         0x322
+#else
 #define CSR_MCOUNTEREN		0x306
+#endif
 #define CSR_MSCRATCH		0x340
 #define CSR_MEPC		0x341
 #define CSR_MCAUSE		0x342
 #define CSR_MTVAL		0x343
 #define CSR_MIP			0x344
+#ifdef CONFIG_RISCV_PRIV_1_9
+#define CSR_MBASE		0x380
+#define CSR_MBOUND		0x381
+#define CSR_MIBASE		0x382
+#define CSR_MIBOUND		0x383
+#define CSR_MDBASE		0x384
+#define CSR_MDBOUND		0x385
+#endif
 #define CSR_CYCLEH		0xc80
 #define CSR_TIMEH		0xc81
 #define CSR_INSTRETH		0xc82
diff --git a/arch/riscv/include/asm/global_data.h b/arch/riscv/include/asm/global_data.h
index 6c50149218..2eb14815bc 100644
--- a/arch/riscv/include/asm/global_data.h
+++ b/arch/riscv/include/asm/global_data.h
@@ -11,6 +11,8 @@
 #define __ASM_GBL_DATA_H
 
 #include <asm/smp.h>
+#include <asm/u-boot.h>
+#include <compiler.h>
 
 /* Architecture-specific global data */
 struct arch_global_data {
diff --git a/arch/riscv/include/asm/smp.h b/arch/riscv/include/asm/smp.h
index 74de92ed13..1b428856b2 100644
--- a/arch/riscv/include/asm/smp.h
+++ b/arch/riscv/include/asm/smp.h
@@ -51,4 +51,47 @@ void handle_ipi(ulong hart);
  */
 int smp_call_function(ulong addr, ulong arg0, ulong arg1, int wait);
 
+/**
+ * riscv_init_ipi() - Initialize inter-process interrupt (IPI) driver
+ *
+ * Platform code must provide this function. This function is called once after
+ * the cpu driver is initialized. No other riscv_*_ipi() calls will be made
+ * before this function is called.
+ *
+ * @return 0 if OK, -ve on error
+ */
+int riscv_init_ipi(void);
+
+/**
+ * riscv_send_ipi() - Send inter-processor interrupt (IPI)
+ *
+ * Platform code must provide this function.
+ *
+ * @hart: Hart ID of receiving hart
+ * @return 0 if OK, -ve on error
+ */
+int riscv_send_ipi(int hart);
+
+/**
+ * riscv_clear_ipi() - Clear inter-processor interrupt (IPI)
+ *
+ * Platform code must provide this function.
+ *
+ * @hart: Hart ID of hart to be cleared
+ * @return 0 if OK, -ve on error
+ */
+int riscv_clear_ipi(int hart);
+
+/**
+ * riscv_get_ipi() - Get status of inter-processor interrupt (IPI)
+ *
+ * Platform code must provide this function.
+ *
+ * @hart: Hart ID of hart to be checked
+ * @pending: Pointer to variable with result of the check,
+ *           1 if IPI is pending, 0 otherwise
+ * @return 0 if OK, -ve on error
+ */
+int riscv_get_ipi(int hart, int *pending);
+
 #endif
diff --git a/arch/riscv/include/asm/u-boot.h b/arch/riscv/include/asm/u-boot.h
index 5ba8e77812..d5e1d5f323 100644
--- a/arch/riscv/include/asm/u-boot.h
+++ b/arch/riscv/include/asm/u-boot.h
@@ -18,25 +18,10 @@
 #ifndef _U_BOOT_H_
 #define _U_BOOT_H_	1
 
+/* Use the generic board which requires a unified bd_info */
+#include <asm-generic/u-boot.h>
 #include <asm/u-boot-riscv.h>
 
-
-typedef struct bd_info {
-	unsigned long	bi_boot_params;	/* where this board expects params */
-	unsigned long	bi_memstart;	/* start of DRAM memory */
-	unsigned long	bi_memsize;	/* size	 of DRAM memory in bytes */
-	unsigned long	bi_flashstart;	/* start of FLASH memory */
-	unsigned long	bi_flashsize;	/* size	 of FLASH memory */
-	unsigned long	bi_flashoffset; /* reserved area for startup monitor */
-	unsigned char	bi_enetaddr[6];
-
-	struct				/* RAM configuration */
-	{
-		unsigned long start;
-		unsigned long size;
-	} bi_dram[CONFIG_NR_DRAM_BANKS];
-} bd_t;
-
 /* For image.h:image_check_target_arch() */
 #define IH_ARCH_DEFAULT IH_ARCH_RISCV
 
diff --git a/arch/riscv/lib/andes_plic.c b/arch/riscv/lib/andes_plic.c
index 20529ab3eb..5cf29df670 100644
--- a/arch/riscv/lib/andes_plic.c
+++ b/arch/riscv/lib/andes_plic.c
@@ -30,20 +30,6 @@
 #define SEND_IPI_TO_HART(hart)  (0x80 >> (hart))
 
 DECLARE_GLOBAL_DATA_PTR;
-static int init_plic(void);
-
-#define PLIC_BASE_GET(void)						\
-	do {								\
-		long *ret;						\
-									\
-		if (!gd->arch.plic) {					\
-			ret = syscon_get_first_range(RISCV_SYSCON_PLIC); \
-			if (IS_ERR(ret))				\
-				return PTR_ERR(ret);			\
-			gd->arch.plic = ret;				\
-			init_plic();					\
-		}							\
-	} while (0)
 
 static int enable_ipi(int hart)
 {
@@ -93,13 +79,21 @@ static int init_plic(void)
 	return -ENODEV;
 }
 
-int riscv_send_ipi(int hart)
+int riscv_init_ipi(void)
 {
-	unsigned int ipi;
+	long *ret = syscon_get_first_range(RISCV_SYSCON_PLIC);
+
+	if (IS_ERR(ret))
+		return PTR_ERR(ret);
+	gd->arch.plic = ret;
+
+	return init_plic();
+}
 
-	PLIC_BASE_GET();
+int riscv_send_ipi(int hart)
+{
+	unsigned int ipi = (SEND_IPI_TO_HART(hart) << (8 * gd->arch.boot_hart));
 
-	ipi = (SEND_IPI_TO_HART(hart) << (8 * gd->arch.boot_hart));
 	writel(ipi, (void __iomem *)PENDING_REG(gd->arch.plic,
 				gd->arch.boot_hart));
 
@@ -110,8 +104,6 @@ int riscv_clear_ipi(int hart)
 {
 	u32 source_id;
 
-	PLIC_BASE_GET();
-
 	source_id = readl((void __iomem *)CLAIM_REG(gd->arch.plic, hart));
 	writel(source_id, (void __iomem *)CLAIM_REG(gd->arch.plic, hart));
 
@@ -120,8 +112,6 @@ int riscv_clear_ipi(int hart)
 
 int riscv_get_ipi(int hart, int *pending)
 {
-	PLIC_BASE_GET();
-
 	*pending = readl((void __iomem *)PENDING_REG(gd->arch.plic,
 						     gd->arch.boot_hart));
 	*pending = !!(*pending & SEND_IPI_TO_HART(hart));
diff --git a/arch/riscv/lib/reset.c b/arch/riscv/lib/reset.c
index 8779c619cc..6008bbe78e 100644
--- a/arch/riscv/lib/reset.c
+++ b/arch/riscv/lib/reset.c
@@ -7,6 +7,7 @@
 #include <command.h>
 #include <hang.h>
 
+#ifndef CONFIG_SYSRESET
 int do_reset(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 {
 	printf("resetting ...\n");
@@ -16,3 +17,4 @@ int do_reset(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 
 	return 0;
 }
+#endif
diff --git a/arch/riscv/lib/sbi_ipi.c b/arch/riscv/lib/sbi_ipi.c
index abafca9e5c..d02e2b4c48 100644
--- a/arch/riscv/lib/sbi_ipi.c
+++ b/arch/riscv/lib/sbi_ipi.c
@@ -8,6 +8,11 @@
 #include <asm/encoding.h>
 #include <asm/sbi.h>
 
+int riscv_init_ipi(void)
+{
+	return 0;
+}
+
 int riscv_send_ipi(int hart)
 {
 	ulong mask;
diff --git a/arch/riscv/lib/sifive_clint.c b/arch/riscv/lib/sifive_clint.c
index 5e0d25720b..78fc6c868d 100644
--- a/arch/riscv/lib/sifive_clint.c
+++ b/arch/riscv/lib/sifive_clint.c
@@ -24,22 +24,8 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-#define CLINT_BASE_GET(void)						\
-	do {								\
-		long *ret;						\
-									\
-		if (!gd->arch.clint) {					\
-			ret = syscon_get_first_range(RISCV_SYSCON_CLINT); \
-			if (IS_ERR(ret))				\
-				return PTR_ERR(ret);			\
-			gd->arch.clint = ret;				\
-		}							\
-	} while (0)
-
 int riscv_get_time(u64 *time)
 {
-	CLINT_BASE_GET();
-
 	*time = readq((void __iomem *)MTIME_REG(gd->arch.clint));
 
 	return 0;
@@ -47,17 +33,24 @@ int riscv_get_time(u64 *time)
 
 int riscv_set_timecmp(int hart, u64 cmp)
 {
-	CLINT_BASE_GET();
-
 	writeq(cmp, (void __iomem *)MTIMECMP_REG(gd->arch.clint, hart));
 
 	return 0;
 }
 
-int riscv_send_ipi(int hart)
+int riscv_init_ipi(void)
 {
-	CLINT_BASE_GET();
+	long *ret = syscon_get_first_range(RISCV_SYSCON_CLINT);
+
+	if (IS_ERR(ret))
+		return PTR_ERR(ret);
+	gd->arch.clint = ret;
+
+	return 0;
+}
 
+int riscv_send_ipi(int hart)
+{
 	writel(1, (void __iomem *)MSIP_REG(gd->arch.clint, hart));
 
 	return 0;
@@ -65,8 +58,6 @@ int riscv_send_ipi(int hart)
 
 int riscv_clear_ipi(int hart)
 {
-	CLINT_BASE_GET();
-
 	writel(0, (void __iomem *)MSIP_REG(gd->arch.clint, hart));
 
 	return 0;
@@ -74,8 +65,6 @@ int riscv_clear_ipi(int hart)
 
 int riscv_get_ipi(int hart, int *pending)
 {
-	CLINT_BASE_GET();
-
 	*pending = readl((void __iomem *)MSIP_REG(gd->arch.clint, hart));
 
 	return 0;
diff --git a/arch/riscv/lib/smp.c b/arch/riscv/lib/smp.c
index 17adb35730..ac22136314 100644
--- a/arch/riscv/lib/smp.c
+++ b/arch/riscv/lib/smp.c
@@ -12,38 +12,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-/**
- * riscv_send_ipi() - Send inter-processor interrupt (IPI)
- *
- * Platform code must provide this function.
- *
- * @hart: Hart ID of receiving hart
- * @return 0 if OK, -ve on error
- */
-extern int riscv_send_ipi(int hart);
-
-/**
- * riscv_clear_ipi() - Clear inter-processor interrupt (IPI)
- *
- * Platform code must provide this function.
- *
- * @hart: Hart ID of hart to be cleared
- * @return 0 if OK, -ve on error
- */
-extern int riscv_clear_ipi(int hart);
-
-/**
- * riscv_get_ipi() - Get status of inter-processor interrupt (IPI)
- *
- * Platform code must provide this function.
- *
- * @hart: Hart ID of hart to be checked
- * @pending: Pointer to variable with result of the check,
- *           1 if IPI is pending, 0 otherwise
- * @return 0 if OK, -ve on error
- */
-extern int riscv_get_ipi(int hart, int *pending);
-
 static int send_ipi_many(struct ipi_data *ipi, int wait)
 {
 	ofnode node, cpus;
@@ -124,7 +92,7 @@ void handle_ipi(ulong hart)
 	 */
 	ret = riscv_clear_ipi(hart);
 	if (ret) {
-		pr_err("Cannot clear IPI of hart %ld\n", hart);
+		pr_err("Cannot clear IPI of hart %ld (error %d)\n", hart, ret);
 		return;
 	}
 
@@ -133,14 +101,11 @@ void handle_ipi(ulong hart)
 
 int smp_call_function(ulong addr, ulong arg0, ulong arg1, int wait)
 {
-	int ret = 0;
-	struct ipi_data ipi;
-
-	ipi.addr = addr;
-	ipi.arg0 = arg0;
-	ipi.arg1 = arg1;
-
-	ret = send_ipi_many(&ipi, wait);
+	struct ipi_data ipi = {
+		.addr = addr,
+		.arg0 = arg0,
+		.arg1 = arg1,
+	};
 
-	return ret;
+	return send_ipi_many(&ipi, wait);
 }