arch/risc-v: Add support for SOPHGO SG2000 SoC (T-Head C906)

This PR adds support for the SOPHGO SG2000 SoC, based on T-Head C906 64-bit RISC-V Core. This will be used by the upcoming port of NuttX for Milk-V Duo S SBC. Most of the code was derived from NuttX for Ox64 BL808. The source files are explained in the articles here: https://github.com/lupyuen/nuttx-sg2000 Modified Files in arch/risc-v: `Kconfig`: Added ARCH_CHIP_SG2000 for SG2000 SoC New Files in arch/risc-v: `include/sg2000/chip.h`: SG2000 Definitions `include/sg2000/irq.h`: External Interrupts `src/sg2000/chip.h`: Interrupt Stack Macro `src/sg2000/sg2000_allocateheap.c`: Kernel Heap `src/sg2000/sg2000_head.S`: Linux Header and Boot Code `src/sg2000/sg2000_irq.c`: Configure Interrupts `src/sg2000/sg2000_irq_dispatch.c`: Dispatch Interrupts `src/sg2000/sg2000_memorymap.h`: Memory Map `src/sg2000/sg2000_mm_init.c`, `sg2000_mm_init.h`: Memory Mgmt `src/sg2000/sg2000_pgalloc.c`: Page Allocator `src/sg2000/sg2000_start.c`: Startup Code `src/sg2000/sg2000_timerisr.c`: Timer Interrupt `src/sg2000/hardware/sg2000_memorymap.h`: PLIC and UART Base Address `src/sg2000/hardware/sg2000_plic.h`: PLIC Register Addresses `src/sg2000/Kconfig`: SG2000 Config `src/sg2000/Make.defs`: Makefile
yf13 · Jun 17, 2024 · 8e30c13 · 8e30c13
1 parent 16d1421
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diff --git a/arch/risc-v/Kconfig b/arch/risc-v/Kconfig
@@ -322,6 +322,25 @@ config ARCH_CHIP_K230
 	---help---
 		Kendryte K230 SoC (RV64GCV and RV64GCVX C908 cores).
 
+config ARCH_CHIP_SG2000
+	bool "SOPHGO SG2000"
+	select ARCH_RV64
+	select ARCH_RV_ISA_M
+	select ARCH_RV_ISA_A
+	select ARCH_RV_ISA_C
+	select ARCH_HAVE_FPU
+	select ARCH_HAVE_DPFPU
+	select ARCH_HAVE_MULTICPU
+	select ARCH_HAVE_MPU
+	select ARCH_MMU_TYPE_SV39
+	select ARCH_HAVE_ADDRENV
+	select ARCH_NEED_ADDRENV_MAPPING
+	select ARCH_HAVE_S_MODE
+	select ONESHOT
+	select ALARM_ARCH
+	---help---
+		SOPHGO SG2000 SoC.
+
 config ARCH_CHIP_RISCV_CUSTOM
 	bool "Custom RISC-V chip"
 	select ARCH_CHIP_CUSTOM
@@ -452,6 +471,7 @@ config ARCH_CHIP
 	default "jh7110"                if ARCH_CHIP_JH7110
 	default "bl808"                 if ARCH_CHIP_BL808
 	default "k230"                  if ARCH_CHIP_K230
+	default "sg2000"                if ARCH_CHIP_SG2000
 
 config ARCH_RISCV_INTXCPT_EXTENSIONS
 	bool "RISC-V Integer Context Extensions"
@@ -658,4 +678,7 @@ endif
 if ARCH_CHIP_K230
 source "arch/risc-v/src/k230/Kconfig"
 endif
+if ARCH_CHIP_SG2000
+source "arch/risc-v/src/sg2000/Kconfig"
+endif
 endif # ARCH_RISCV
diff --git a/arch/risc-v/include/sg2000/chip.h b/arch/risc-v/include/sg2000/chip.h
@@ -0,0 +1,24 @@
+/****************************************************************************
+ * arch/risc-v/include/sg2000/chip.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_RISCV_INCLUDE_SG2000_CHIP_H
+#define __ARCH_RISCV_INCLUDE_SG2000_CHIP_H
+
+#endif /* __ARCH_RISCV_INCLUDE_SG2000_CHIP_H */
diff --git a/arch/risc-v/include/sg2000/irq.h b/arch/risc-v/include/sg2000/irq.h
@@ -0,0 +1,36 @@
+/****************************************************************************
+ * arch/risc-v/include/sg2000/irq.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_RISCV_INCLUDE_SG2000_IRQ_H
+#define __ARCH_RISCV_INCLUDE_SG2000_IRQ_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Map RISC-V exception code to NuttX IRQ */
+
+#define NR_IRQS (RISCV_IRQ_SEXT + 57)
+
+#endif /* __ARCH_RISCV_INCLUDE_SG2000_IRQ_H */
diff --git a/arch/risc-v/src/sg2000/Kconfig b/arch/risc-v/src/sg2000/Kconfig
diff --git a/arch/risc-v/src/sg2000/Make.defs b/arch/risc-v/src/sg2000/Make.defs
@@ -0,0 +1,30 @@
+############################################################################
+# arch/risc-v/src/sg2000/Make.defs
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+include common/Make.defs
+
+# Specify our HEAD assembly file.  This will be linked as
+# the first object file, so it will appear at address 0
+HEAD_ASRC = sg2000_head.S
+
+# Specify our C code within this directory to be included
+CHIP_CSRCS  = sg2000_start.c sg2000_irq_dispatch.c sg2000_irq.c
+CHIP_CSRCS += sg2000_timerisr.c sg2000_allocateheap.c
+CHIP_CSRCS += sg2000_mm_init.c sg2000_pgalloc.c
diff --git a/arch/risc-v/src/sg2000/chip.h b/arch/risc-v/src/sg2000/chip.h
@@ -0,0 +1,75 @@
+/****************************************************************************
+ * arch/risc-v/src/sg2000/chip.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_RISCV_SRC_SG2000_CHIP_H
+#define __ARCH_RISCV_SRC_SG2000_CHIP_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+/* Include the chip capabilities file */
+
+#include <arch/sg2000/chip.h>
+
+#include "sg2000_memorymap.h"
+
+#include "hardware/sg2000_memorymap.h"
+#include "hardware/sg2000_plic.h"
+
+#include "riscv_internal.h"
+#include "riscv_percpu.h"
+
+/****************************************************************************
+ * Macro Definitions
+ ****************************************************************************/
+
+#ifdef __ASSEMBLY__
+
+/****************************************************************************
+ * Name: setintstack
+ *
+ * Description:
+ *   Set the current stack pointer to the  "top" the correct interrupt stack
+ *   for the current CPU.
+ *
+ ****************************************************************************/
+
+#if defined(CONFIG_SMP) && CONFIG_ARCH_INTERRUPTSTACK > 15
+.macro  setintstack tmp0, tmp1
+  riscv_mhartid \tmp0
+  li    \tmp1, STACK_ALIGN_DOWN(CONFIG_ARCH_INTERRUPTSTACK)
+  mul   \tmp1, \tmp0, \tmp1
+  la    \tmp0, g_intstacktop
+  sub   sp, \tmp0, \tmp1
+.endm
+#endif /* CONFIG_SMP && CONFIG_ARCH_INTERRUPTSTACK > 15 */
+
+#if CONFIG_ARCH_INTERRUPTSTACK > 15
+#if !defined(CONFIG_SMP) && defined(CONFIG_ARCH_USE_S_MODE)
+.macro  setintstack tmp0, tmp1
+  csrr    \tmp0, CSR_SCRATCH
+  REGLOAD sp, RISCV_PERCPU_IRQSTACK(\tmp0)
+.endm
+#endif /* !defined(CONFIG_SMP) && defined(CONFIG_ARCH_USE_S_MODE) */
+#endif /* CONFIG_ARCH_INTERRUPTSTACK > 15 */
+
+#endif /* __ASSEMBLY__  */
+#endif /* __ARCH_RISCV_SRC_SG2000_CHIP_H */
diff --git a/arch/risc-v/src/sg2000/hardware/sg2000_memorymap.h b/arch/risc-v/src/sg2000/hardware/sg2000_memorymap.h
@@ -0,0 +1,32 @@
+/****************************************************************************
+ * arch/risc-v/src/sg2000/hardware/sg2000_memorymap.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_RISCV_SRC_SG2000_HARDWARE_SG2000_MEMORYMAP_H
+#define __ARCH_RISCV_SRC_SG2000_HARDWARE_SG2000_MEMORYMAP_H
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Register Base Address ****************************************************/
+
+#define SG2000_PLIC_BASE    0x70000000ul
+
+#endif /* __ARCH_RISCV_SRC_SG2000_HARDWARE_SG2000_MEMORYMAP_H */
diff --git a/arch/risc-v/src/sg2000/hardware/sg2000_plic.h b/arch/risc-v/src/sg2000/hardware/sg2000_plic.h
@@ -0,0 +1,51 @@
+/****************************************************************************
+ * arch/risc-v/src/sg2000/hardware/sg2000_plic.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_RISCV_SRC_SG2000_HARDWARE_SG2000_PLIC_H
+#define __ARCH_RISCV_SRC_SG2000_HARDWARE_SG2000_PLIC_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Interrupt Priority */
+
+#define SG2000_PLIC_PRIORITY  (SG2000_PLIC_BASE + 0x000000)
+
+/* Hart 0 S-Mode Interrupt Enable */
+
+#define SG2000_PLIC_ENABLE1   (SG2000_PLIC_BASE + 0x002080)
+#define SG2000_PLIC_ENABLE2   (SG2000_PLIC_BASE + 0x002084)
+
+/* Hart 0 S-Mode Priority Threshold */
+
+#define SG2000_PLIC_THRESHOLD (SG2000_PLIC_BASE + 0x201000)
+
+/* Hart 0 S-Mode Claim / Complete */
+
+#define SG2000_PLIC_CLAIM     (SG2000_PLIC_BASE + 0x201004)
+
+#endif /* __ARCH_RISCV_SRC_SG2000_HARDWARE_SG2000_PLIC_H */
diff --git a/arch/risc-v/src/sg2000/sg2000_allocateheap.c b/arch/risc-v/src/sg2000/sg2000_allocateheap.c
@@ -0,0 +1,85 @@
+/****************************************************************************
+ * arch/risc-v/src/sg2000/sg2000_allocateheap.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/kmalloc.h>
+#include <nuttx/userspace.h>
+#include <nuttx/arch.h>
+#include <arch/board/board_memorymap.h>
+#include "riscv_internal.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define KRAM_END    KSRAM_END
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_allocate_heap
+ *
+ * Description:
+ *   This function will be called to dynamically set aside the heap region.
+ *
+ *   For the kernel build (CONFIG_BUILD_PROTECTED=y) with both kernel- and
+ *   user-space heaps (CONFIG_MM_KERNEL_HEAP=y), this function provides the
+ *   size of the unprotected, user-space heap.
+ *
+ *   If a protected kernel-space heap is provided, the kernel heap must be
+ *   allocated (and protected) by an analogous up_allocate_kheap().
+ *
+ *   The following memory map is assumed for the flat build:
+ *
+ *   .data region.  Size determined at link time.
+ *   .bss  region  Size determined at link time.
+ *   IDLE thread stack.  Size determined by CONFIG_IDLETHREAD_STACKSIZE.
+ *   Heap.  Extends to the end of User SRAM.
+ *
+ *   The following memory map is assumed for the protect build.
+ *   The kernel and user space have it's own dedicated heap space.
+ *
+ *   User .data region         Size determined at link time
+ *   User .bss region          Size determined at link time
+ *   User heap                 Extends to the end of User SRAM
+ *   Kernel .data region       Size determined at link time
+ *   Kernel .bss  region       Size determined at link time
+ *   Kernel IDLE thread stack  Size determined by CONFIG_IDLETHREAD_STACKSIZE
+ *   Kernel heap               Size determined by CONFIG_MM_KERNEL_HEAPSIZE
+ *
+ ****************************************************************************/
+
+void up_allocate_kheap(void **heap_start, size_t *heap_size)
+{
+  /* Return the heap settings */
+
+  *heap_start = (void *)g_idle_topstack;
+  *heap_size = KRAM_END - g_idle_topstack;
+}