<ibex> Add support for ibex simple system platform

- Fixed elf.mk to print size when flash is absent
- Add support for rv32imc cpu
- Add platform drivers for ibex
- Add console driver for ibex family

mk/elf.mk

@@ -20,6 +20,10 @@ ELF		:= $(addprefix $(OUT)/,$(PROJECT).elf)
 LD_SCRIPT	:= $(addprefix $(OUT)/,$(LD_SCRIPT:.ld.sx=.ld))
 LD_SUPPLEMENT	:= $(addprefix $(OUT)/,$(LD_SUPPLEMENT:.ld.sx=.ld))
 
+ifneq ($(FLASH_START),)
+SIZE_ARGS	:= -m Flash $(FLASH_START) $(FLASH_SIZE)
+endif
+
 elf: $(ELF)
 
 .SECONDEXPANSION:
@@ -30,8 +34,7 @@ $(ELF): $(DEP_LIBS) $(DEP_OBJS) $(LD_SCRIPT) $(LD_SUPPLEMENT) | $$(SIZE)
 	$(OD) -Dx -h --wide $@ > $(@:.elf=.lst)
 	$(OC) -O binary $@ $(@:.elf=.bin)
 	$(OC) -O ihex $@ $(@:.elf=.hex)
-	@cd $(@D); $(SIZE) -f $(@F) -m Flash $(FLASH_START) $(FLASH_SIZE)	\
-	-m RAM $(RAM_START) $(RAM_SIZE) $(MEMSIZE_ARGS)
+	@cd $(@D); $(SIZE) -f $(@F) $(SIZE_ARGS) -m RAM $(RAM_START) $(RAM_SIZE) $(MEMSIZE_ARGS)
 	@echo ""
 
 $(OUT)/%.ld: %.ld.sx

projects/demo_ibex_ss/build.mk

@@ -0,0 +1,20 @@
+#
+# CYANCORE LICENSE
+# Copyrights (C) 2024, Cyancore Team
+#
+# File Name		: build.mk
+# Description		: This file builds and gathers project properties
+# Primary Author	: Akash Kollipara [[email protected]]
+# Organisation		: Cyancore Core-Team
+#
+
+PROJECT_DIR	:= $(GET_PATH)
+
+OPTIMIZATION	:= s
+
+EXE_MODE	:= terravisor
+
+include $(PROJECT_DIR)/config.mk
+
+DIR		:= $(PROJECT_DIR)
+include mk/obj.mk

projects/demo_ibex_ss/config.mk

@@ -0,0 +1,18 @@
+#
+# CYANCORE LICENSE
+# Copyrights (C) 2019, Cyancore Team
+#
+# File Name		: config.mk
+# Description		: This file consists of project config
+# Primary Author	: Akash Kollipara [[email protected]]
+# Organisation		: Cyancore Core-Team
+#
+
+COMPILER	:= gcc
+FAMILY		:= ibex
+PLATFORM	:= simple_system
+STDLOG_MEMBUF	:= 1
+BOOTMSGS        := 1
+EARLYCON_SERIAL	:= 1
+OBRDLED_ENABLE	:= 0
+TERRAKERN	:= 0

projects/demo_ibex_ss/project.c

@@ -0,0 +1,43 @@
+/*
+ * CYANCORE LICENSE
+ * Copyrights (C) 2022, Cyancore Team
+ *
+ * File Name		: project.c
+ * Description		: This file consists of project srouces
+ * Primary Author	: Akash Kollipara [[email protected]]
+ * Organisation		: Cyancore Core-Team
+ */
+
+#include <status.h>
+#include <stdio.h>
+#include <string.h>
+#include <terravisor/bootstrap.h>
+#include <driver.h>
+#include <time.h>
+
+void plug()
+{
+	bootstrap();
+	driver_setup_all();
+
+	printf("Demo Program!\n");
+	return;
+}
+
+
+void play()
+{
+	static unsigned char i = 0;
+	char progress[] = "-\\|/";
+	uint64_t time;
+	char c = progress[(i++) % strlen(progress)];
+	get_timestamp(&time);
+	time /= 1000U;
+
+	printf("[%012llu] Running Blinky ... [%c]", time, c);
+
+	mdelay(500);
+
+	printf("\r");
+	return;
+}

src/arch/riscv/32/i/terravisor/arch.c

@@ -62,7 +62,9 @@ void arch_early_setup()
 	arch_di_mei();
 	arch_di_mtime();
 	arch_di_msoftirq();
+#ifndef RV_VEC_MODE
 	riscv_update_vector();
+#endif
 	return;
 }
 

src/arch/riscv/32/i/terravisor/asm.S

@@ -69,9 +69,16 @@ function exception_handler_base
 	EPILOGUE
 	mret
 
+#ifndef RV_VEC_MODE
 function riscv_update_vector
 	la	a0, exception_handler_base
 	csrw	mtvec, a0
 	mv	a0, zero
 	fence.i
 	ret
+#else
+vectors vtors
+.rept 32
+	j	exception_handler_base
+.endr
+#endif

src/arch/riscv/32/imc/README.md

@@ -0,0 +1,9 @@
+# RV32 IMC-Extension
+
+#### Supported Extensions
+* RV32I baseline
+* M - Hardware multiplication
+* C - Compressed instructions
+
+#### Supported execution level
+* Terravisor

src/arch/riscv/32/imc/terravisor/README.md

@@ -0,0 +1,7 @@
+# RV32 IMAC [Terravisor]
+
+Home directory for RV32imac Terravisor
+
+For terravisor documentation please read [Terravisor README](../../../../../visor/terravisor/README.md)
+
+Please refer [README.md](../../i/terravisor/README.md) in i/terravisor  directory.

src/arch/riscv/32/imc/terravisor/build.mk

@@ -0,0 +1,16 @@
+#
+# CYANCORE LICENSE
+# Copyrights (C) 2024, Cyancore Team
+#
+# File Name		: build.mk
+# Description		: Build script for this directory.
+# Primary Authod	: Akash Kollipara [[email protected]]
+# Organisation		: Cyancore Core-Team
+#
+
+RV32IMC_T_ARCH_DIR	:= $(GET_PATH)
+
+include $(RV32IMC_T_ARCH_DIR)/../../i/terravisor/build.mk
+
+DIR		:= $(RV32IMC_T_ARCH_DIR)
+include mk/obj.mk

src/driver/console/con_serial_ibex/build.mk

@@ -0,0 +1,20 @@
+#
+# CYANCORE LICENSE
+# Copyrights (C) 2019, Cyancore Team
+#
+# File Name		: build.mk
+# Description		: This file accumulates sources of console serial
+# Primary Author	: Akash Kollipara [[email protected]]
+# Organisation		: Cyancore Core-Team
+#
+
+DIR		:= $(GET_PATH)
+
+EARLYCON_SERIAL	?= 0
+CONSOLE_SERIAL	:= 0
+
+$(eval $(call add_define,EARLYCON_SERIAL))
+
+ifeq ($(filter $(CONSOLE_SERIAL) $(EARLYCON_SERIAL),1),1)
+include mk/obj.mk
+endif

src/driver/console/con_serial_ibex/earlycon_serial.c

@@ -0,0 +1,92 @@
+/*
+ * CYANCORE LICENSE
+ * Copyrights (C) 2019, Cyancore Team
+ *
+ * File Name		: earlycon_serial.c
+ * Description		: This file contains sources of uart earlycon
+ * Primary Author	: Akash Kollipara [[email protected]]
+ * Organisation		: Cyancore Core-Team
+ */
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include <status.h>
+#include <stdlib.h>
+#include <syslog.h>
+#include <lock/spinlock.h>
+#include <resource.h>
+#include <visor_call.h>
+#include <arch.h>
+#include <driver.h>
+#include <interrupt.h>
+#include <hal/uart.h>
+#include <driver/console.h>
+#include <driver/sysclk.h>
+
+static uart_port_t *earlycon_port;
+
+static status_t earlycon_serial_setup()
+{
+	uart_get_properties(earlycon_port, console_uart);
+
+	sysdbg2("UART engine @ %p\n", earlycon_port->baddr);
+	/*
+	 * If memory mapping is applicable,
+	 * put it in mmu supported guide.
+	 */
+	return success;
+}
+
+static status_t earlycon_serial_write(const char c)
+{
+	status_t ret;
+	ret = uart_tx(earlycon_port, c);
+	return ret;
+}
+
+static console_t *earlycon_serial_driver;
+
+status_t earlycon_serial_driver_exit()
+{
+	status_t ret;
+	ret = console_release_device();
+	free(earlycon_port);
+	free(earlycon_serial_driver);
+	return ret;
+}
+
+status_t earlycon_serial_driver_setup()
+{
+	status_t ret;
+
+	earlycon_port = (uart_port_t *)malloc(sizeof(uart_port_t));
+	if(!earlycon_port)
+	{
+		ret = error_memory_low;
+		goto cleanup_1;
+	}
+
+	earlycon_serial_driver = (console_t *)malloc(sizeof(console_t));
+	if(!earlycon_serial_driver)
+	{
+		ret = error_memory_low;
+		goto cleanup_1;
+	}
+	earlycon_serial_driver->write = &earlycon_serial_write;
+
+	ret = earlycon_serial_setup();
+	if(ret)
+		goto cleanup_1;
+	ret = console_attach_device(ret, earlycon_serial_driver);
+	if(!ret)
+		goto exit;
+cleanup_1:
+	earlycon_serial_driver_exit();
+exit:
+	return ret;
+}
+
+#if EARLYCON_SERIAL==1
+INCLUDE_DRIVER(earlycon, earlycon_serial_driver_setup, earlycon_serial_driver_exit, 0, 2, 2);
+#endif

src/platform/ibex/simple_system/arch/build.mk

@@ -0,0 +1,14 @@
+#
+# CYANCORE LICENSE
+# Copyrights (C) 2019, Cyancore Team
+#
+# File Name		: build.mk
+# Description		: This file accumulates the build fe310 series
+#			  platform arch sources
+# Primary Author	: Akash Kollipara [[email protected]]
+# Organisation		: Cyancore Core-Team
+#
+
+DIR		:= $(GET_PATH)
+
+include mk/obj.mk

src/platform/ibex/simple_system/arch/panic.S

@@ -0,0 +1,15 @@
+/*
+ * CYANCORE LICENSE
+ * Copyrights (C) 2019, Cyancore Team
+ *
+ * File Name		: panic.S
+ * Description		: This file contains platform panic handler
+ * Primary Author	: Akash Kollipara [[email protected]]
+ * Organisation		: Cyancore Core-Team
+ */
+
+#include <asm.inc>
+
+function plat_panic_handler
+	wfi
+	j	plat_panic_handler

src/platform/ibex/simple_system/arch/platform_cpu.c

@@ -0,0 +1,16 @@
+#include <stdint.h>
+#include <status.h>
+#include <syslog.h>
+#include <arch.h>
+#include <platform.h>
+
+void platform_print_cpu_info()
+{
+	unsigned int core_id = arch_core_index(),
+		     isa = arch_core_isa(),
+		     arch_id = arch_core_archid(),
+		     imp_id = arch_core_impid(),
+		     vendor_id = arch_core_vendor();
+
+	syslog(info, "CPU Info: ID = %u\n-------------------------------\nISA\t\t: 0x%x\nArch ID\t\t: 0x%x\nImp ID\t\t: 0x%x\nVendor ID\t: 0x%x\n\n", core_id, isa, arch_id, imp_id, vendor_id);
+};

src/platform/ibex/simple_system/arch/platform_mem.c

@@ -0,0 +1,13 @@
+#include <stdint.h>
+#include <status.h>
+#include <string.h>
+#include <platform.h>
+
+extern uintptr_t _bss_start, _bss_size;
+
+status_t platform_bss_clear()
+{
+	memset(&_bss_start, 0, (size_t)&_bss_size);
+	return success;
+}
+

src/platform/ibex/simple_system/build.mk

@@ -0,0 +1,35 @@
+#
+# CYANCORE LICENSE
+# Copyrights (C) 2024, Cyancore Team
+#
+# File Name		: build.mk
+# Description		: This file provides and accumulates configs
+#			  and sources for simple system by ibex
+# Primary Author	: Akash Kollipara [[email protected]]
+# Organisation		: Cyancore Core-Team
+#
+
+SIMSYS_DIR	:= $(GET_PATH)
+
+ARCH		:= riscv
+BIT		:= 32
+ARCH_VARIANT	:= imc
+ARCH_ABI	:= ilp32
+TARGET_FLAGS	+= -march=rv32imc -mabi=$(ARCH_ABI)
+PLAT_INCLUDE	+= $(SIMSYS_DIR)/include
+OUTPUT_FORMAT	:= elf32-littleriscv
+
+
+LD_SCRIPT       := $(SIMSYS_DIR)/sections.ld.sx
+PLAT_INCLUDE	+= $(SIMSYS_DIR)/include
+LINT_FLAGS	+= --platform=unix32
+
+USE_DEFAULT_RESOURCES	:= 1
+LOCAL_INTERRUPT_DEVICE	:= 1
+PLAT_INTERRUPT_DEVICE	:= 0
+
+include $(SIMSYS_DIR)/config.mk
+include $(SIMSYS_DIR)/arch/build.mk
+include $(SIMSYS_DIR)/hal/build.mk
+include $(SIMSYS_DIR)/platform/build.mk
+$(eval $(call check_and_include,USE_DEFAULT_RESOURCES,$(SIMSYS_DIR)/resources/build.mk))