working with pmu_interrupts

.gitignore

@@ -0,0 +1,10 @@
+bao-baremetal-guest/build/
+bao-hypervisor/build/
+bao-hypervisor/bin/
+bao-hypervisor/.git/
+bao-hypervisor/.vscode/
+opensbi/build/
+opensbi/.git/
+bitstream/
+linux/
+linux_image/

README.md

@@ -0,0 +1,51 @@
+# Prologue
+Follow the same prologue as [here](https://github.com/ninolomata/bao-cva6-guide).
+
+# Linux
+Build the Linux image + dtb blob:
+```
+    make ARCH=rv64 IMAGE=../../linux_image/Image DTB=../occamy_bao.dtb TARGET=linux-rv64-alsaqr
+```
+# Bao-Hypervisor
+```
+    git clone https://github.com/ninolomata/bao-hypervisor.git
+    git checkout openpiton-temp
+    cp -r ../bao/configs/* ./configs
+    cp -r ../bao/platform/* ./src/platform
+    make PLATFORM=alsaqr CONFIG=alsaqr-linux CONFIG_BUILTIN=y
+```
+# Opensbi
+```
+    git clone https://github.com/AlSaqr-platform/opensbi.git
+    make PLATFORM=fpga/alsaqr FW_PAYLOAD=y FW_PAYLOAD_PATH=../bao-hypervisor/bin/alsaqr/builtin-configs/alsaqr-linux/bao.bin FW_FDT_PATH=../linux/occamy.dtb
+```
+
+# Running code 
+
+As of now, to interface with Alsaqr on FPGA we use [openocd](https://github.com/riscv/riscv-openocd). The debugger we use is [this one](https://www.olimex.com/Products/ARM/JTAG/ARM-USB-OCD-H/).
+
+ * Open the hw manager and load the bitstream  **alsaqr_xilinx_llc_pc.bit**  (pre-built available on the folder **bitstream**)
+
+ * Open 3 terminals:
+
+### Terminal 1
+
+```
+openocd -f zcu-102-ariane.cfg
+```
+### Terminal 2
+
+```
+screen -L /dev/ttyUSBi 115200
+```
+### Terminal 3
+
+```
+riscv64-unknown-elf-gdb <path-to-compiled-elf>
+from gdb terminal
+(a) target remote :3333
+(b) monitor reset halt
+(c) load
+(d) c
+```
+At this point you are supposed to see the uart prints on the screen.

bao-baremetal-guest/.gitignore

@@ -0,0 +1,4 @@
+build/*
+*.o
+*.d
+*.elf

bao-baremetal-guest/.vscode/settings.json

@@ -0,0 +1,6 @@
+{
+    "files.associations": {
+        "uart.h": "c",
+        "irq.h": "c"
+    }
+}

bao-baremetal-guest/Makefile

@@ -0,0 +1,134 @@
+# 
+# Bao, a Lightweight Static Partitioning Hypervisor 
+#
+# Copyright (c) Bao Project (www.bao-project.org), 2019-
+#
+# Authors:
+#      Jose Martins <[email protected]>
+#      Sandro Pinto <[email protected]>
+#
+# Bao is free software; you can redistribute it and/or modify it under the
+# terms of the GNU General Public License version 2 as published by the Free
+# Software Foundation, with a special exception exempting guest code from such
+# license. See the COPYING file in the top-level directory for details. 
+#
+#
+
+
+NAME := baremetal
+OPT_LEVEL = 2
+DEBUG_LEVEL = 3
+
+
+ifneq ($(MAKECMDGOALS), clean)
+ifeq ($(PLATFORM),)
+$(error Undefined platform)
+endif
+endif
+
+SRC_DIR:=./src
+BUILD_DIR:=build/$(PLATFORM)
+TARGET:=$(BUILD_DIR)/$(NAME)
+CORE_DIR:=$(SRC_DIR)/core
+PLATFORM_DIR:=$(SRC_DIR)/platform/$(PLATFORM)
+DRIVERS_DIR:=$(SRC_DIR)/drivers
+SRC_DIRS:=$(SRC_DIR) $(CORE_DIR) $(PLATFORM_DIR)
+INC_DIRS:=$(addsuffix /inc, $(SRC_DIRS))
+
+ifeq ($(wildcard $(PLATFORM_DIR)),)
+$(error unsupported platform $(PLATFORM))
+endif
+
+-include $(SRC_DIR)/sources.mk
+C_SRC+=$(addprefix $(SRC_DIR)/, $(src_c_srcs))
+
+-include $(CORE_DIR)/sources.mk
+C_SRC+=$(addprefix $(CORE_DIR)/, $(core_c_srcs))
+
+-include $(PLATFORM_DIR)/plat.mk
+-include $(PLATFORM_DIR)/sources.mk
+C_SRC+=$(addprefix $(PLATFORM_DIR)/, $(plat_c_srcs))
+ASM_SRC+=$(addprefix $(PLATFORM_DIR)/, $(plat_s_srcs))
+
+SRC_DIRS+= $(foreach driver, $(drivers), $(DRIVERS_DIR)/$(driver))
+INC_DIRS+= $(foreach driver, $(drivers), $(DRIVERS_DIR)/$(driver)/inc)
+-include $(foreach driver, $(drivers), $(DRIVERS_DIR)/$(driver)/sources.mk)
+C_SRC+=$(addprefix $(DRIVERS_DIR)/, $(driver_c_srcs))
+ASM_SRC+=$(addprefix $(DRIVERS_DIR)/, $(driver_s_srcs))
+
+ARCH_DIR:= $(SRC_DIR)/arch/$(ARCH)
+SRC_DIRS+= $(ARCH_DIR)
+INC_DIRS+= $(ARCH_DIR)/inc
+-include $(ARCH_DIR)/arch.mk
+-include $(ARCH_DIR)/sources.mk
+C_SRC+=$(addprefix $(ARCH_DIR)/, $(arch_c_srcs))
+ASM_SRC+=$(addprefix $(ARCH_DIR)/, $(arch_s_srcs))
+
+LD_FILE:= $(SRC_DIR)/linker.ld
+GEN_LD_FILE:= $(BUILD_DIR)/linker.ld
+#C_SRC = $(foreach src_dir, $(SRC_DIRS), $(wildcard $(src_dir)/*.c))
+#ASM_SRC = $(foreach src_dir, $(SRC_DIRS), $(wildcard $(src_dir)/*.S))
+OBJS = $(C_SRC:$(SRC_DIR)/%.c=$(BUILD_DIR)/%.o) $(ASM_SRC:$(SRC_DIR)/%.S=$(BUILD_DIR)/%.o)
+DEPS = $(OBJS:%=%.d) $(GEN_LD_FILE).d
+DIRS:=$(sort $(dir $(OBJS) $(DEPS)))
+
+CC=$(CROSS_COMPILE)gcc
+AS=$(CROSS_COMPILE)as
+LD=$(CROSS_COMPILE)ld
+OBJCOPY=$(CROSS_COMPILE)objcopy
+OBJDUMP=$(CROSS_COMPILE)objdump
+
+GENERIC_FLAGS = $(ARCH_GENERIC_FLAGS) -O$(OPT_LEVEL) -g$(DEBUG_LEVEL) -static
+ASFLAGS = $(GENERIC_FLAGS) $(ARCH_ASFLAGS) 
+CFLAGS = $(GENERIC_FLAGS) $(ARCH_CFLAGS) 
+CPPFLAGS =	$(ARCH_CPPFLAGS) $(addprefix -I, $(INC_DIRS)) -MD -MF $@.d
+ifneq ($(SINGLE_CORE),)
+CPPFLAGS+=-DSINGLE_CORE=y
+endif
+LDFLAGS = $(GENERIC_FLAGS) $(ARCH_LDFLAGS) -nostartfiles
+all: $(TARGET).bin
+
+ifneq ($(MAKECMDGOALS), clean)
+-include $(DEPS)
+endif
+
+$(TARGET).bin: $(TARGET).elf
+	$(OBJCOPY) -O binary $< $@
+
+$(TARGET).elf: $(OBJS) $(GEN_LD_FILE)
+	$(CC) $(LDFLAGS) -T$(GEN_LD_FILE) $(OBJS) -o $@
+	$(OBJDUMP) -S $@ > $(TARGET).asm
+	$(OBJDUMP) -x -d --wide $@ > $(TARGET).lst
+
+$(BUILD_DIR):
+	mkdir -p $@
+
+$(OBJS): | $(BUILD_DIR)
+
+$(BUILD_DIR)/%.o: $(SRC_DIR)/%.c
+	$(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@
+
+$(BUILD_DIR)/%.o: $(SRC_DIR)/%.S
+	$(CC) $(ASFLAGS) $(CPPFLAGS) -c $< -o $@
+
+$(GEN_LD_FILE): $(LD_FILE)
+	$(CC) $(CPPFLAGS) -E -x assembler-with-cpp $< | grep "^[^#;]" > $@
+
+.SECONDEXPANSION:
+
+$(OBJS) $(DEPS): | $$(@D)/
+
+$(DIRS):
+	mkdir -p $@
+
+
+clean:
+	@rm -rf build
+	@rm -f *.elf
+	@rm -f *.bin	
+	@rm -f *.asm
+	@rm -f *.lst
+
+
+
+.PHONY: all clean

bao-baremetal-guest/src/arch/armv8/arch.mk

@@ -0,0 +1,7 @@
+CROSS_COMPILE ?=aarch64-none-elf-
+
+ARCH_GENERIC_FLAGS = -march=armv8-a -DGIC_VERSION=$(GIC_VERSION) #-mtls-dialect=trad
+ARCH_ASFLAGS = 
+ARCH_CFLAGS = 
+ARCH_CPPFLAGS =	
+ARCH_LDFLAGS = 

bao-baremetal-guest/src/arch/armv8/exceptions.S

@@ -0,0 +1,127 @@
+/** 
+ * Bao, a Lightweight Static Partitioning Hypervisor 
+ *
+ * Copyright (c) Bao Project (www.bao-project.org), 2019-
+ *
+ * Authors:
+ *      Jose Martins <[email protected]>
+ *      Sandro Pinto <[email protected]>
+ *
+ * Bao is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License version 2 as published by the Free
+ * Software Foundation, with a special exception exempting guest code from such
+ * license. See the COPYING file in the top-level directory for details. 
+ *
+ */
+
+#define ENTRY_SIZE   (0x80)
+
+.macro SAVE_REGS
+
+    sub sp, sp, #(22 * 8)
+
+    stp x0, x1,   [sp, #(8*0)]
+    stp x2, x3,   [sp, #(8*2)]
+    stp x4, x5,   [sp, #(8*4)]
+    stp x6, x7,   [sp, #(8*6)]
+    stp x8, x9,   [sp, #(8*8)]
+    stp x10, x11, [sp, #(8*10)]
+    stp x12, x13, [sp, #(8*12)]
+    stp x14, x15, [sp, #(8*14)]
+    stp x16, x17, [sp, #(8*16)]
+    stp x18, x19, [sp, #(8*18)]
+    stp x29, x30, [sp, #(8*28)]
+.endm
+
+.macro RESTORE_REGS
+    ldp x0, x1,   [sp, #(8*0)]
+    ldp x2, x3,   [sp, #(8*2)]
+    ldp x4, x5,   [sp, #(8*4)]
+    ldp x6, x7,   [sp, #(8*6)]
+    ldp x8, x9,   [sp, #(8*8)]
+    ldp x10, x11, [sp, #(8*10)]
+    ldp x12, x13, [sp, #(8*12)]
+    ldp x14, x15, [sp, #(8*14)]
+    ldp x16, x17, [sp, #(8*16)]
+    ldp x18, x19, [sp, #(8*18)]
+    ldp x29, x30, [sp, #(8*28)]
+
+    add sp, sp, #(22 * 8)
+.endm
+
+.balign 0x800
+.global _exception_vector
+_exception_vector:
+/* 
+ * EL1 with SP0
+ */  
+.balign ENTRY_SIZE
+curr_el_sp0_sync:        
+    b	.
+.balign ENTRY_SIZE
+curr_el_sp0_irq:  
+    b   .
+.balign ENTRY_SIZE
+curr_el_sp0_fiq:         
+    b	.
+.balign ENTRY_SIZE
+curr_el_sp0_serror:      
+    b	.
+
+
+/* 
+ * EL1 with SPx
+ */  
+.balign ENTRY_SIZE  
+curr_el_spx_sync:        
+    b	.
+.balign ENTRY_SIZE
+curr_el_spx_irq:       
+    SAVE_REGS
+    bl	gic_handle
+    RESTORE_REGS
+    eret
+.balign ENTRY_SIZE
+curr_el_spx_fiq:         
+    SAVE_REGS
+    bl	gic_handle
+    RESTORE_REGS
+    eret
+.balign ENTRY_SIZE
+curr_el_spx_serror:      
+    b	.         
+
+/* 
+ * Lower EL using AArch64
+ */  
+
+.balign ENTRY_SIZE
+lower_el_aarch64_sync:
+    b .
+.balign ENTRY_SIZE
+lower_el_aarch64_irq:    
+    b .
+.balign ENTRY_SIZE
+lower_el_aarch64_fiq:    
+    b	.
+.balign ENTRY_SIZE
+lower_el_aarch64_serror: 
+    b	.          
+
+/* 
+ * Lower EL using AArch32
+ */  
+.balign ENTRY_SIZE   
+lower_el_aarch32_sync:   
+    b	.
+.balign ENTRY_SIZE
+lower_el_aarch32_irq:    
+    b	.
+.balign ENTRY_SIZE
+lower_el_aarch32_fiq:    
+    b	.
+.balign ENTRY_SIZE
+lower_el_aarch32_serror: 
+    b	.
+
+.balign ENTRY_SIZE