Thanks for taking a look. Comments below.
On Mon, Mar 13, 2023 at 11:04 AM Gedare Bloom <ged...@rtems.org> wrote:
> On Thu, Mar 9, 2023 at 8:48 PM Alan Cudmore <alan.cudm...@gmail.com>
> wrote:
> >
> > This patch set adds support for the Kendryte K210 RISC-V BSP variant.
> > The SoC uses existing PLIC, Timer, and console UART. It only needs
> > SoC specific initalization and an embedded device tree binary similar
> > to the polarfire SoC BSP.
> >
> > Updates #4876
> > ---
> > bsps/riscv/riscv/config/kendrytek210.cfg | 9 +
> > bsps/riscv/riscv/console/console-config.c | 10 +-
> > bsps/riscv/riscv/console/fe310-uart.c | 2 +-
> > bsps/riscv/riscv/dts/kendryte-k210.dts | 216 ++++++++++++
> > bsps/riscv/riscv/include/bsp.h | 4 +
> > bsps/riscv/riscv/include/bsp/k210.h | 91 +++++
> > .../riscv/include/bsp/kendryte-k210-dtb.h | 315 ++++++++++++++++++
> > bsps/riscv/riscv/include/bsp/riscv.h | 4 +
> > bsps/riscv/riscv/start/bspstart.c | 42 +++
> > 9 files changed, 687 insertions(+), 6 deletions(-)
> > create mode 100644 bsps/riscv/riscv/config/kendrytek210.cfg
> > create mode 100644 bsps/riscv/riscv/dts/kendryte-k210.dts
> > create mode 100644 bsps/riscv/riscv/include/bsp/k210.h
> > create mode 100644 bsps/riscv/riscv/include/bsp/kendryte-k210-dtb.h
> >
> > diff --git a/bsps/riscv/riscv/config/kendrytek210.cfg
> b/bsps/riscv/riscv/config/kendrytek210.cfg
> > new file mode 100644
> > index 0000000000..b04e78b0e9
> > --- /dev/null
> > +++ b/bsps/riscv/riscv/config/kendrytek210.cfg
> > @@ -0,0 +1,9 @@
> > +include $(RTEMS_ROOT)/make/custom/default.cfg
> > +
> > +RTEMS_CPU = riscv
> > +
> > +CPU_CFLAGS = -march=rv64imafdc -mabi=lp64d -mcmodel=medany
> > +
> > +LDFLAGS = -Wl,--gc-sections
> > +
> > +CFLAGS_OPTIMIZE_V ?= -O2 -g -ffunction-sections -fdata-sections
> > diff --git a/bsps/riscv/riscv/console/console-config.c
> b/bsps/riscv/riscv/console/console-config.c
> > index 4916191e0b..72743fe9d5 100644
> > --- a/bsps/riscv/riscv/console/console-config.c
> > +++ b/bsps/riscv/riscv/console/console-config.c
> > @@ -55,7 +55,7 @@
> > #include <libfdt.h>
> > #include <string.h>
> >
> > -#if RISCV_ENABLE_FRDME310ARTY_SUPPORT != 0
> > +#if RISCV_ENABLE_SIFIVE_UART_SUPPORT != 0
> > #include <bsp/fe310-uart.h>
> > static fe310_uart_context fe310_uart_instance;
> > #endif
> > @@ -239,7 +239,7 @@ static void riscv_console_probe(void)
> > }
> > #endif
> >
> > -#if RISCV_ENABLE_FRDME310ARTY_SUPPORT != 0
> > +#if RISCV_ENABLE_SIFIVE_UART_SUPPORT != 0
> > if (fdt_stringlist_contains(compat, compat_len, "sifive,uart0")) {
> > fe310_uart_context *ctx;
> >
> > @@ -255,7 +255,7 @@ static void riscv_console_probe(void)
> > riscv_console.getchar = fe310_uart_read;
> > }
> >
> > - rtems_termios_device_context_initialize(&ctx->base, "FE310UART");
> > + rtems_termios_device_context_initialize(&ctx->base, "SIFIVEUART");
> > }
> > #endif
> >
> > @@ -290,7 +290,7 @@ rtems_status_code console_initialize(
> > size_t i;
> > #endif
> >
> > -#if RISCV_ENABLE_FRDME310ARTY_SUPPORT != 0
> > +#if RISCV_ENABLE_SIFIVE_UART_SUPPORT != 0
> > fe310_uart_context *ctx;
> > char fe310_path[] = "/dev/ttyS0";
> > #endif
> > @@ -326,7 +326,7 @@ rtems_status_code console_initialize(
> > }
> > #endif
> >
> > -#if RISCV_ENABLE_FRDME310ARTY_SUPPORT != 0
> > +#if RISCV_ENABLE_SIFIVE_UART_SUPPORT != 0
> > ctx = &fe310_uart_instance;
> > rtems_termios_device_install(
> > fe310_path,
> > diff --git a/bsps/riscv/riscv/console/fe310-uart.c
> b/bsps/riscv/riscv/console/fe310-uart.c
> > index 506521add0..ddabcff4c8 100644
> > --- a/bsps/riscv/riscv/console/fe310-uart.c
> > +++ b/bsps/riscv/riscv/console/fe310-uart.c
> > @@ -53,7 +53,7 @@ static void fe310_uart_write (
> > fe310_uart_context * ctx = (fe310_uart_context*) base;
> > size_t i;
> >
> > - ctx->regs->div = riscv_get_core_frequency() / 115200 - 1;
> > + ctx->regs->div = (riscv_get_core_frequency() / 115200 - 1) & 0xFFFF;
> > ctx->regs->txctrl |= 1;
> > ctx->regs->rxctrl |= 1;
> >
> > diff --git a/bsps/riscv/riscv/dts/kendryte-k210.dts
> b/bsps/riscv/riscv/dts/kendryte-k210.dts
> > new file mode 100644
> > index 0000000000..379aaf01a3
> > --- /dev/null
> > +++ b/bsps/riscv/riscv/dts/kendryte-k210.dts
> > @@ -0,0 +1,216 @@
> > +/* SPDX-License-Identifier: BSD-2-Clause */
> > +
> > +/*
> > + * Copyright (C) Alan Cudmore
> > + * Copyright (C) Padmarao Begari
> > + * Copyright (C) 2022 Microchip Technology Inc.
> > + *
> > + * Redistribution and use in source and binary forms, with or without
> > + * modification, are permitted provided that the following conditions
> > + * are met:
> > + * 1. Redistributions of source code must retain the above copyright
> > + * notice, this list of conditions and the following disclaimer.
> > + * 2. Redistributions in binary form must reproduce the above copyright
> > + * notice, this list of conditions and the following disclaimer in
> the
> > + * documentation and/or other materials provided with the
> distribution.
> > + *
> > + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> "AS IS"
> > + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
> TO, THE
> > + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
> PURPOSE
> > + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
> CONTRIBUTORS BE
> > + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> > + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
> > + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
> BUSINESS
> > + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
> IN
> > + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
> OTHERWISE)
> > + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
> OF THE
> > + * POSSIBILITY OF SUCH DAMAGE.
> > + */
> > +
> > + /* This is a device tree for the Kendryte K210 SoC. It is a simplified
> tree
> > + * to support the current RTEMS BSP, but it is not sufficient enough
> for
> > + * full linux or u-boot support.
> > + * The file structure is based on the device tree source for the
> > + * Polarfire SoC created by Padmaro Begari. The K210 device trees from
> > + * u-boot were originally used to bring up the RTEMS BSP and were
> > + * referenced to develop this file.
> > + */
> > +
> > +/dts-v1/;
> > +
> > +/ {
> > + /* 32 bit address bus - upper 32 bits are ignored */
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > +
> > + model = "Kendtryte K210 generic";
> > + compatible = "canaan,kendryte-k210";
> > +
> > + aliases {
> > + serial0 = &uarths0;
> > + serial1 = &uart1;
> > + /* serial2 = &uart2; */
> > + /* serial3 = &uart3; */
> > + };
> > +
> > + chosen {
> > + stdout-path = "serial0";
> > + };
> > +
> > + cpus {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > +
> > + timebase-frequency = <7800000>;
> > +
> > + cpu0: cpu@0 {
> > + compatible = "canaan,k210", "riscv";
> > + device_type = "cpu";
> > + reg = <0>;
> > + riscv,isa = "rv64imafdc";
> > + i-cache-block-size = <64>;
> > + i-cache-size = <0x8000>;
> > + d-cache-block-size = <64>;
> > + d-cache-size = <0x8000>;
> > + cpu0_intc: interrupt-controller {
> > + #interrupt-cells = <1>;
> > + compatible = "riscv,cpu-intc";
> > + interrupt-controller;
> > + };
> > + };
> > + cpu1: cpu@1 {
> > + compatible = "canaan,k210", "riscv";
> > + device_type = "cpu";
> > + reg = <1>;
> > + riscv,isa = "rv64imafdc";
> > + i-cache-block-size = <64>;
> > + i-cache-size = <0x8000>;
> > + d-cache-block-size = <64>;
> > + d-cache-size = <0x8000>;
> > + cpu1_intc: interrupt-controller {
> > + #interrupt-cells = <1>;
> > + compatible = "riscv,cpu-intc";
> > + interrupt-controller;
> > + };
> > + };
> > +
> > + };
> > +
> > + clocks {
> > + in0: oscillator {
> > + compatible = "fixed-clock";
> > + #clock-cells = <0>;
> > + clock-frequency = <26000000>;
> > + };
> > + };
> > +
> > + sram: memory@80000000 {
> > + device_type = "memory";
> > + compatible = "canaan,k210-sram";
> > + reg = <0x80000000 0x400000>,
> > + <0x80400000 0x200000>,
> > + <0x80600000 0x200000>;
> > + reg-names = "sram0",
> > + "sram1",
> > + "aisram";
> > +
> > + };
> > +
> > + soc: soc {
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + compatible = "simple-bus";
> > + ranges;
> > + interrupt-parent = <&plic0>;
> > +
> > + rom0: nvmem@1000 {
> > + reg = <0x1000 0x1000>;
> > + read-only;
> > + };
> > +
> > + clint0: timer@2000000 {
> > + compatible = "riscv,clint0","sifive,clint0";
> > + reg = <0x2000000 0xC000>;
> > + interrupts-extended = <&cpu0_intc 3>,<&cpu0_intc
> 7>,
> > + <&cpu1_intc 3>,<&cpu1_intc
> 7>;
> > + };
> > +
> > + plic0: interrupt-controller@c000000 {
> > + #interrupt-cells = <1>;
> > + #address-cells = <0>;
> > + compatible = "riscv,plic0","sifive,plic-1.0.0";
> > + reg = <0xC000000 0x4000000>;
> > + riscv,ndev = <65>;
> > + interrupt-controller;
> > + interrupts-extended =
> > + <&cpu0_intc 11>, <&cpu0_intc 9>,
> > + <&cpu1_intc 11>, <&cpu1_intc 9>;
> > + };
> > +
> > + uarths0: serial@38000000 {
> > + compatible = "canaan,k210-uarths","sifive,uart0";
> > + reg = <0x38000000 0x1000>;
> > + interrupts = <33>;
> > + clocks = <&sysclk 0>;
> > +
> > + };
> > +
> > + /* apb0 has gpio1 and additional uarts */
> > + apb0: bus@50200000 {
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + compatible = "simple-pm-bus";
> > + ranges;
> > + clocks = <&sysclk 8>;
> > +
> > + uart1: serial@50210000 {
> > + compatible = "snps,dw-apb-uart";
> > + reg = <0x50210000 0x100>;
> > + interrupts = <11>;
> > + clocks = <&sysclk 30>,
> > + <&sysclk 8>;
> > + clock-namees = "baudclk", "abp_pclk";
> > + resets = <&sysrst 16>;
> > + reg-io-width = <4>;
> > + reg-shift = <2>;
> > + dcd-override;
> > + dsr-override;
> > + cts-override;
> > + ri-override;
> > + };
> > + };
> > +
> > + apb1: bus@50400000 {
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + compatible = "simple-pm-bus";
> > + ranges;
> > + clocks = <&sysclk 9>;
> > +
> > + sysctl: syscon@50440000 {
> > + compatible =
> "canaan,k210-sysctl","syscon",
> > + "simple-mfd";
> > + reg = <0x50440000 0x100>;
> > + clocks = <&sysclk 9>;
> > + clock-names = "pclk";
> > + sysclk: clock-controller {
> > + #clock-cells = <1>;
> > + compatible = "canaan,k210-rst";
> > + clock = <&in0>;
> > + };
> > + sysrst: reset-coontroller {
> > + compatible = "canaan,k210-rst";
> > + #reset-cells = <1>;
> > + };
> > + reboot: syscon-reboot {
> > + compatible = "syscon-reboot";
> > + regmap = <&sysctl>;
> > + offset = <48>;
> > + mask = <1>;
> > + value = <1>;
> > + };
> > + };
> > + };
> > +
> > + };
> > +};
> > diff --git a/bsps/riscv/riscv/include/bsp.h
> b/bsps/riscv/riscv/include/bsp.h
> > index 911b85f4a3..c33de42aa7 100644
> > --- a/bsps/riscv/riscv/include/bsp.h
> > +++ b/bsps/riscv/riscv/include/bsp.h
> > @@ -60,6 +60,10 @@
> >
> > #include <rtems/devnull.h>
> >
> > +#if RISCV_ENABLE_KENDRYTE_K210_SUPPORT != 0
> > + #include <bsp/k210.h>
> > +#endif
> > +
> > #ifdef __cplusplus
> > extern "C" {
> > #endif
> > diff --git a/bsps/riscv/riscv/include/bsp/k210.h
> b/bsps/riscv/riscv/include/bsp/k210.h
> > new file mode 100644
> > index 0000000000..558502cd11
> > --- /dev/null
> > +++ b/bsps/riscv/riscv/include/bsp/k210.h
> > @@ -0,0 +1,91 @@
> > +/* SPDX-License-Identifier: BSD-2-Clause */
> > +
> > +/**
> > + * @file
> > + *
> > + * @ingroup k210_regs
> > + *
> > + * @brief k210 RISC-V CPU defines.
> > + */
> > +
> > +/*
> > + *
> > + * Copyright (c) 2022 Alan Cudmore
> > + *
> > + * The license and distribution terms for this file may be
> > + * found in the file LICENSE in this distribution or at
> > + *
> > + * http://www.rtems.org/license/LICENSE
>
>
OK - I'll update this
> Please use the 2-BSD boilerplate consistent with the SPDX above.
>
> > + *
> > + */
> > +
> > +#ifndef LIBBSP_RISCV_RISCV_K210_H
> > +#define LIBBSP_RISCV_RISCV_K210_H
> > +
> > +#include <bspopts.h>
> > +#include <stdint.h>
> > +#include <bsp/utility.h>
> > +
> > +/**
> > + * @defgroup K210 RISC V Register Definitions
> > + *
> > + * @ingroup RTEMSBSPsriscv
> > + *
> > + * @brief Register Definitions
> > + *
> > + * @{
> > + */
> > +
> > +#ifdef __cplusplus
> > +extern "C" {
> > +#endif
> > +
> > +/* For PLL / Clocks */
> > +#define K210_SYSCTL_BASE 0x50440000
> > +
> > +#define PLL_CLK_R(n) (n & 0x00000F)
> Usually good practice to put parens around CPP macro arguments, e.g.,
> ((n) & 0x00000F)
>
> > +#define PLL_CLK_F(n) ((n & 0x0003F0) >> 4)
> > +#define PLL_CLK_OD(n) ((n & 0x003C00) >> 10)
> > +#define CLKSEL0_ACLK_SEL(n) (n & 0x00000001)
> > +
> > +typedef struct {
> > + uint32_t git_id;
> > + uint32_t clk_freq;
> > + uint32_t pll0;
> > + uint32_t pll1;
> > + uint32_t pll2;
> > + uint32_t resv5;
> > + uint32_t pll_lock;
> > + uint32_t rom_error;
> > + uint32_t clk_sel0;
> > + uint32_t clk_sel1;
> > + uint32_t clk_en_cent;
> > + uint32_t clk_en_peri;
> > + uint32_t soft_reset;
> > + uint32_t peri_reset;
> > + uint32_t clk_th0;
> > + uint32_t clk_th1;
> > + uint32_t clk_th2;
> > + uint32_t clk_th3;
> > + uint32_t clk_th4;
> > + uint32_t clk_th5;
> > + uint32_t clk_th6;
> > + uint32_t misc;
> > + uint32_t peri;
> > + uint32_t spi_sleep;
> > + uint32_t reset_status;
> > + uint32_t dma_sel0;
> > + uint32_t dma_sel1;
> > + uint32_t power_sel;
> > + uint32_t resv28;
> > + uint32_t resv29;
> > + uint32_t resv30;
> > + uint32_t resv31;
> > +} k210_sysctl_t;
> > +
> > +#ifdef __cplusplus
> > +}
> > +#endif
> > +
> > +/** @} */
> > +#endif /* LIBBSP_RISCV_RISCV_K210_H */
> > diff --git a/bsps/riscv/riscv/include/bsp/kendryte-k210-dtb.h
> b/bsps/riscv/riscv/include/bsp/kendryte-k210-dtb.h
> > new file mode 100644
> > index 0000000000..ad13aefdbf
> > --- /dev/null
> > +++ b/bsps/riscv/riscv/include/bsp/kendryte-k210-dtb.h
> > @@ -0,0 +1,315 @@
> > +/* SPDX-License-Identifier: BSD-2-Clause */
> > +
> > +/*
> > + * Declarations for C structure representing binary file system.dtb
> > + *
> > + * WARNING: Automatically generated -- do not edit!
> > + */
> > +
> > +/*
> > + * Copyright (C) Alan Cudmore
> > + *
> > + * Redistribution and use in source and binary forms, with or without
> > + * modification, are permitted provided that the following conditions
> > + * are met:
> > + * 1. Redistributions of source code must retain the above copyright
> > + * notice, this list of conditions and the following disclaimer.
> > + * 2. Redistributions in binary form must reproduce the above copyright
> > + * notice, this list of conditions and the following disclaimer in
> the
> > + * documentation and/or other materials provided with the
> distribution.
> > + *
> > + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> "AS IS"
> > + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
> TO, THE
> > + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
> PURPOSE
> > + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
> CONTRIBUTORS BE
> > + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> > + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
> > + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
> BUSINESS
> > + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
> IN
> > + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
> OTHERWISE)
> > + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
> OF THE
> > + * POSSIBILITY OF SUCH DAMAGE.
> > + */
> > +
> > +#ifndef __kendryte_k210_dtb_h
> > +#define __kendryte_k210_dtb_h
> > +
> > +#include <rtems/score/basedefs.h>
> > +#include <sys/types.h>
> > +
> > +const unsigned char system_dtb[] RTEMS_ALIGNED(8) = {
> > + 0xd0, 0x0d, 0xfe, 0xed, 0x00, 0x00, 0x0c, 0xa7, 0x00, 0x00, 0x00,
> 0x38,
> > + 0x00, 0x00, 0x0a, 0xb4, 0x00, 0x00, 0x00, 0x28, 0x00, 0x00, 0x00,
> 0x11,
> > + 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
> 0xf3,
> > + 0x00, 0x00, 0x0a, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00,
> > + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x01,
> > + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00,
> 0x04,
> > + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
> 0x03,
> > + 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x0f, 0x00, 0x00, 0x00,
> 0x01,
> > + 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x17, 0x00, 0x00, 0x00,
> 0x1b,
> > + 0x4b, 0x65, 0x6e, 0x64, 0x74, 0x72, 0x79, 0x74, 0x65, 0x20, 0x4b,
> 0x32,
> > + 0x31, 0x30, 0x20, 0x67, 0x65, 0x6e, 0x65, 0x72, 0x69, 0x63, 0x00,
> 0x00,
> > + 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x15, 0x00, 0x00, 0x00,
> 0x21,
> > + 0x63, 0x61, 0x6e, 0x61, 0x61, 0x6e, 0x2c, 0x6b, 0x65, 0x6e, 0x64,
> 0x72,
> > + 0x79, 0x74, 0x65, 0x2d, 0x6b, 0x32, 0x31, 0x30, 0x00, 0x00, 0x00,
> 0x00,
> > + 0x00, 0x00, 0x00, 0x01, 0x61, 0x6c, 0x69, 0x61, 0x73, 0x65, 0x73,
> 0x00,
> > + 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x15, 0x00, 0x00, 0x00,
> 0x2c,
> > + 0x2f, 0x73, 0x6f, 0x63, 0x2f, 0x73, 0x65, 0x72, 0x69, 0x61, 0x6c,
> 0x40,
> > + 0x33, 0x38, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x00, 0x00, 0x00,
> 0x00,
> > + 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x22, 0x00, 0x00, 0x00,
> 0x34,
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> 0x69,
> > + 0x64, 0x65, 0x00, 0x63, 0x6c, 0x6f, 0x63, 0x6b, 0x2d, 0x6e, 0x61,
> 0x6d,
> > + 0x65, 0x73, 0x00, 0x63, 0x6c, 0x6f, 0x63, 0x6b, 0x00, 0x23, 0x72,
> 0x65,
> > + 0x73, 0x65, 0x74, 0x2d, 0x63, 0x65, 0x6c, 0x6c, 0x73, 0x00, 0x72,
> 0x65,
> > + 0x67, 0x6d, 0x61, 0x70, 0x00, 0x6f, 0x66, 0x66, 0x73, 0x65, 0x74,
> 0x00,
> > + 0x6d, 0x61, 0x73, 0x6b, 0x00, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x00,
> > +};
> > +
> > +const size_t system_dtb_size = sizeof(system_dtb);
> > +
> > +#endif /* __kendryte_k210_dtb_h */
> > diff --git a/bsps/riscv/riscv/include/bsp/riscv.h
> b/bsps/riscv/riscv/include/bsp/riscv.h
> > index bbaaa246c1..d294f1ae58 100644
> > --- a/bsps/riscv/riscv/include/bsp/riscv.h
> > +++ b/bsps/riscv/riscv/include/bsp/riscv.h
> > @@ -56,6 +56,10 @@ uint32_t riscv_get_hart_index_by_phandle(uint32_t
> phandle);
> > void htif_poweroff(void);
> > #endif
> >
> > +#if RISCV_ENABLE_KENDRYTE_K210_SUPPORT != 0
> > +uint32_t k210_get_frequency(void);
> > +#endif
> > +
> > #ifdef __cplusplus
> > }
> > #endif
> > diff --git a/bsps/riscv/riscv/start/bspstart.c
> b/bsps/riscv/riscv/start/bspstart.c
> > index 30d479ce88..a0b6e683f6 100644
> > --- a/bsps/riscv/riscv/start/bspstart.c
> > +++ b/bsps/riscv/riscv/start/bspstart.c
> > @@ -201,6 +201,14 @@ static uint32_t get_core_frequency(void)
> > return fdt32_to_cpu(*val);
> > }
> > #endif
> > +
> > +#if RISCV_ENABLE_KENDRYTE_K210_SUPPORT != 0
> > + uint32_t cpu_clock;
> > +
> > + cpu_clock = k210_get_frequency();
> > + return cpu_clock;
> > +#endif
> > +
> > return 0;
>
When you choose the kendrtyek210 BSP variant, the
RISCV_ENABLE_KENDRYTE_K210_SUPPORT is set to true enabling the code that is
needed for frequency calculation in this file. I tried to follow the same
pattern for the MPFS and FRDME310ARTY variants here.
The K210, FRME310ARTY, and MPFS options could probably use refactoring, but
I was reluctant to change existing code for the MPFS and 310ARTY since I do
not have a way of testing them.
This code is unreachable if RISCV_ENABLE_KENDRYTE_K210_SUPPORT != 0.
>
> > }
> >
> > @@ -215,6 +223,40 @@ uint32_t bsp_fdt_map_intr(const uint32_t *intr,
> size_t icells)
> > return RISCV_INTERRUPT_VECTOR_EXTERNAL(intr[0]);
> > }
> >
> > +#if RISCV_ENABLE_KENDRYTE_K210_SUPPORT != 0
> > +uint32_t k210_get_frequency(void)
> > +{
> > + k210_sysctl_t *sysctl = (k210_sysctl_t *)K210_SYSCTL_BASE;
> > + uint32_t cpu_clock = 0;
> > + uint32_t clk_freq;
> > + uint32_t pll0, nr, nf, od;
> > + uint32_t node;
> > + const char *fdt;
> > + const fdt32_t *val;
> > + int len;
> > +
> > + fdt = bsp_fdt_get();
> > + node = fdt_node_offset_by_compatible(fdt, -1,"fixed-clock");
> > + val = fdt_getprop(fdt, node, "clock-frequency", &len);
> > + if (val != NULL && len == 4) {
> > + clk_freq = fdt32_to_cpu(*val);
> > +
> > + if (CLKSEL0_ACLK_SEL(sysctl->clk_sel0) == 1) {
> > + /* PLL0 selected */
> > + pll0 = sysctl->pll0;
> > + nr = PLL_CLK_R(pll0) + 1;
> > + nf = PLL_CLK_F(pll0) + 1;
> > + od = PLL_CLK_OD(pll0) + 1;
> > + cpu_clock = (clk_freq / nr * nf / od)/2;
> > + } else {
> > + /* OSC selected */
> > + cpu_clock = clk_freq;
> > + }
> > + }
> > + return cpu_clock;
> > +}
> > +#endif
> > +
> > void bsp_start(void)
> > {
> > riscv_find_harts();
> > --
> > 2.25.1
> >
> > _______________________________________________
> > devel mailing list
> > devel@rtems.org
> > http://lists.rtems.org/mailman/listinfo/devel
>
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