311552045 lab3

.vscode/settings.json

@@ -6,6 +6,36 @@
         "utility": "c",
         "typeinfo": "c",
         "stdlib.h": "c",
-        "mini_uart.h": "c"
-    }
+        "mini_uart.h": "c",
+        "gpio.h": "c",
+        "base.h": "c",
+        "stddef.h": "c",
+        "deque": "c",
+        "forward_list": "c",
+        "list": "c",
+        "vector": "c",
+        "math.h": "c",
+        "functional": "c",
+        "istream": "c",
+        "ostream": "c",
+        "tuple": "c",
+        "type_traits": "c",
+        "dynamic_alloc.h": "c",
+        "page_alloc.h": "c",
+        "stdint.h": "c",
+        "device_tree.h": "c",
+        "list.h": "c",
+        "thread.h": "c",
+        "signal.h": "c",
+        "limits": "c",
+        "mbox.h": "c",
+        "virtual_mem.h": "c",
+        "string.h": "c",
+        "tmpfs.h": "c",
+        "vfs.h": "c",
+        "string": "c",
+        "fat32.h": "c",
+        "random": "c"
+    },
+    "C_Cpp.errorSquiggles": "enabled"
 }

Lab3/Makefile

@@ -0,0 +1,58 @@
+ARMGNU ?= aarch64-linux-gnu
+
+COPS = -Wall -nostdlib -nostartfiles -ffreestanding -Iinclude -g -mgeneral-regs-only
+ASMOPS = -Iinclude 
+
+BUILD_DIR = build
+SRC_DIR = src
+
+all : kernel8.img bootloader.img userprogram.img
+
+clean :
+	rm -rf $(BUILD_DIR) *.img 
+
+$(BUILD_DIR)/%_c.o: $(SRC_DIR)/%.c
+	@mkdir -p $(@D)
+	$(ARMGNU)-gcc $(COPS) -MMD -c $< -o $@
+
+$(BUILD_DIR)/%_s.o: $(SRC_DIR)/%.S
+	@mkdir -p $(@D)
+	$(ARMGNU)-gcc $(ASMOPS) -MMD -c $< -o $@
+
+C_FILES = $(wildcard $(SRC_DIR)/*/*.c)
+ASM_FILES = $(wildcard $(SRC_DIR)/*/*.S)
+OBJ_FILES = $(C_FILES:$(SRC_DIR)/%.c=$(BUILD_DIR)/%_c.o)
+OBJ_FILES += $(ASM_FILES:$(SRC_DIR)/%.S=$(BUILD_DIR)/%_s.o)
+
+DEP_FILES = $(OBJ_FILES:%.o=%.d)
+-include $(DEP_FILES)
+
+kernel8.img: $(SRC_DIR)/kernel/link.ld $(OBJ_FILES)
+	$(ARMGNU)-ld -T $(SRC_DIR)/kernel/link.ld -o $(BUILD_DIR)/kernel/kernel8.elf   $(filter $(BUILD_DIR)/kernel/%_c.o $(BUILD_DIR)/kernel/%_s.o $(BUILD_DIR)/lib/%_c.o $(BUILD_DIR)/lib/%_s.o, $(OBJ_FILES))
+	$(ARMGNU)-objcopy $(BUILD_DIR)/kernel/kernel8.elf -O binary kernel8.img
+
+run:
+	qemu-system-aarch64 -M raspi3 -kernel kernel8.img -serial null -serial stdio -display none -initrd initramfs.cpio -dtb bcm2710-rpi-3-b-plus.dtb -d int
+
+debug:
+	qemu-system-aarch64 -M raspi3 -kernel kernel8.img -serial null -serial stdio -display none -s -S -initrd initramfs.cpio -dtb bcm2710-rpi-3-b-plus.dtb -d int
+
+bootloader.img: $(SRC_DIR)/bootloader/link.ld $(OBJ_FILES)
+	$(ARMGNU)-ld -T $(SRC_DIR)/bootloader/link.ld -o $(BUILD_DIR)/bootloader/bootloader.elf  $(filter $(BUILD_DIR)/bootloader/%_c.o $(BUILD_DIR)/bootloader/%_s.o $(BUILD_DIR)/lib/%_c.o $(BUILD_DIR)/lib/%_s.o, $(OBJ_FILES))
+	$(ARMGNU)-objcopy -O binary $(BUILD_DIR)/bootloader/bootloader.elf bootloader.img
+
+userprogram.img: $(SRC_DIR)/userprogram/link.ld $(OBJ_FILES)
+	$(ARMGNU)-ld -T $(SRC_DIR)/userprogram/link.ld -o $(BUILD_DIR)/userprogram/userprogram.elf  $(filter $(BUILD_DIR)/userprogram/%_c.o $(BUILD_DIR)/userprogram/%_s.o $(BUILD_DIR)/lib/%_c.o $(BUILD_DIR)/lib/%_s.o, $(OBJ_FILES))
+	$(ARMGNU)-objcopy -O binary $(BUILD_DIR)/userprogram/userprogram.elf userprogram.img
+
+test:
+	@echo Hello
+
+pseudoTTY:
+	qemu-system-aarch64 -M raspi3 -kernel bootloader.img -serial null -serial pty -display none -initrd initramfs.cpio -dtb bcm2710-rpi-3-b-plus.dtb
+
+debug_boot:
+	qemu-system-aarch64 -M raspi3 -kernel bootloader.img -serial null -serial pty -display none -initrd initramfs.cpio -dtb bcm2710-rpi-3-b-plus.dtb -s -S
+
+no_int_qemu:
+	qemu-system-aarch64 -M raspi3 -kernel kernel8.img -serial null -serial stdio -display none -initrd initramfs.cpio -dtb bcm2710-rpi-3-b-plus.dtb

Lab3/bootloader.py

@@ -0,0 +1,25 @@
+import os
+import time
+
+file_size = os.path.getsize('kernel8.img')
+print("File Size is :", file_size, "bytes")
+
+# with open('/dev/pts/35', "wb", buffering=0) as tty:
+with open('/dev/ttyUSB0', "wb", buffering=0) as tty:
+    # send Start
+    tty.write(b"Start")
+    time.sleep(1)
+
+    # send kernel size 
+    tty.write(file_size.to_bytes(4, 'little'))
+    time.sleep(1)
+
+    # send kernel
+    with open('kernel8.img', 'rb') as kernel_file:
+        while True:
+            data = kernel_file.read()
+            if not data:
+                break
+            tty.write(data)
+            time.sleep(1)
+

Lab3/debug.log

@@ -0,0 +1,9 @@
+qemu-system-aarch64 -M raspi3 -kernel kernel8.img -serial null -serial stdio -display none -initrd initramfs.cpio -dtb bcm2710-rpi-3-b-plus.dtb -d int
+Board model: 00000000
+Board revision: 00A02082
+Serial number: 0000000000000000
+ARM memory base address: 00000000
+ARM memory size: 3C000000
+initramfs_addr at 0000000008000000
+Starting shell...
+# 

Lab3/include/device_tree.h

@@ -0,0 +1,9 @@
+#ifndef _DEVICE_TREE_H
+#define _DEVICE_TREE_H
+
+typedef int (*fdt_callback)(void *);
+int initramfs_callback(void *dtb);
+int dtb_parser(void *dtb);
+void fdt_traverse(fdt_callback cb, char *dtb);
+
+#endif /*_DEVICE_TREE_H */

Lab3/include/load_kernel.h

@@ -0,0 +1,7 @@
+#ifndef _LOAD_KERNEL_H
+#define _LOAD_KERNEL_H
+
+void load_kernel(char *dest);
+void relocate(char *from_dest, char *to_dest);
+
+#endif /*_LOAD_KERNEL_H */

Lab3/include/mbox.h

@@ -0,0 +1,6 @@
+#ifndef _MBOX_H
+#define _MBOX_H
+
+void mbox_main();
+
+#endif /*_MBOX_H */

Lab3/include/mbox_call.h

@@ -0,0 +1,9 @@
+#ifndef _MBOX_CALL_H
+#define _MBOX_CALL_H
+
+/* a properly aligned buffer */
+extern volatile unsigned int mbox[36];
+
+int mbox_call(unsigned char ch);
+
+#endif /*_MBOX_CALL_H */

Lab3/include/mini_uart.h

@@ -0,0 +1,17 @@
+#ifndef _MINI_UART_H
+#define _MINI_UART_H
+
+void uart_init(void);
+char uart_recv(void);
+void uart_send(char c);
+void uart_send_string(char *str);
+void uart_send_string_of_size(char *str, int size);
+void uart_hex(unsigned int d);
+void uart_send_space(int size);
+
+void asyn_read();
+void asyn_write();
+void uart_rx_handler();
+void uart_tx_handler();
+
+#endif /*_MINI_UART_H */

Lab3/include/mm.h

@@ -0,0 +1,19 @@
+#ifndef _MM_H
+#define _MM_H
+
+#define PAGE_SHIFT 12
+#define TABLE_SHIFT 9
+#define SECTION_SHIFT (PAGE_SHIFT + TABLE_SHIFT)
+
+#define PAGE_SIZE (1 << PAGE_SHIFT)
+#define SECTION_SIZE (1 << SECTION_SHIFT)
+
+#define LOW_MEMORY (2 * SECTION_SIZE)
+
+#ifndef __ASSEMBLER__
+
+void memzero(unsigned long src, unsigned long n);
+
+#endif
+
+#endif /*_MM_H */

Lab3/include/peripherals/base.h

@@ -0,0 +1,6 @@
+#ifndef	_P_BASE_H
+#define	_P_BASE_H
+
+#define PBASE 0x3F000000
+
+#endif  /*_P_BASE_H */

Lab3/include/peripherals/device_tree.h

@@ -0,0 +1,16 @@
+#ifndef _P_DEVICE_TREE_H
+#define _P_DEVICE_TREE_H
+
+#define FDT_MAGIC 0xD00DFEED
+#define FDT_VERSION 0x00000011
+#define FDT_TK_NULL 0X00000000
+
+#define FDT_BEGIN_NODE 0X00000001
+#define FDT_END_NODE 0X00000002
+#define FDT_PROP 0X00000003
+#define FDT_NOP 0X00000004
+#define FDT_END 0X00000009
+
+#define FDT_CPIO_INITRAMFS_PROPNAME "linux,initrd-start"
+
+#endif /*_P_DEVICE_TREE_H */

Lab3/include/peripherals/gpio.h

@@ -0,0 +1,25 @@
+#ifndef _P_GPIO_H
+#define _P_GPIO_H
+
+#include "peripherals/base.h"
+
+#define GPFSEL0 (PBASE + 0x00200000)
+#define GPFSEL1 (PBASE + 0x00200004)
+#define GPFSEL2 (PBASE + 0x00200008)
+#define GPFSEL3 (PBASE + 0x0020000C)
+#define GPFSEL4 (PBASE + 0x00200010)
+#define GPFSEL5 (PBASE + 0x00200014)
+#define GPSET0 (PBASE + 0x0020001C)
+#define GPSET1 (PBASE + 0x00200020)
+#define GPCLR0 (PBASE + 0x00200028)
+#define GPLEV0 (PBASE + 0x00200034)
+#define GPLEV1 (PBASE + 0x00200038)
+#define GPEDS0 (PBASE + 0x00200040)
+#define GPEDS1 (PBASE + 0x00200044)
+#define GPHEN0 (PBASE + 0x00200064)
+#define GPHEN1 (PBASE + 0x00200068)
+#define GPPUD (PBASE + 0x00200094)
+#define GPPUDCLK0 (PBASE + 0x00200098)
+#define GPPUDCLK1 (PBASE + 0x0020009C)
+
+#endif /*_P_GPIO_H */

Lab3/include/peripherals/irq.h

@@ -0,0 +1,27 @@
+#ifndef _P_IRQ_H
+#define _P_IRQ_H
+
+#include "peripherals/base.h"
+
+#define IRQ_BASIC_PENDING (PBASE + 0x0000B200)
+#define IRQ_PENDING_1 (PBASE + 0x0000B204)
+#define IRQ_PENDING_2 (PBASE + 0x0000B208)
+#define FIQ_CONTROL (PBASE + 0x0000B20C)
+#define ENABLE_IRQS_1 (PBASE + 0x0000B210)
+#define ENABLE_IRQS_2 (PBASE + 0x0000B214)
+#define ENABLE_BASIC_IRQS (PBASE + 0x0000B218)
+#define DISABLE_IRQS_1 (PBASE + 0x0000B21C)
+#define DISABLE_IRQS_2 (PBASE + 0x0000B220)
+#define DISABLE_BASIC_IRQS (PBASE + 0x0000B224)
+
+#define SYSTEM_TIMER_IRQ_0 (1 << 0)
+#define SYSTEM_TIMER_IRQ_1 (1 << 1)
+#define SYSTEM_TIMER_IRQ_2 (1 << 2)
+#define SYSTEM_TIMER_IRQ_3 (1 << 3)
+
+#define CORE0_INTR_SRC 0x40000060
+#define CORE1_INTR_SRC 0x40000064
+#define CORE2_INTR_SRC 0x40000068
+#define CORE3_INTR_SRC 0x4000006C
+
+#endif /*_P_IRQ_H */

Lab3/include/peripherals/mbox_call.h

@@ -0,0 +1,40 @@
+#ifndef _P_MBOX_CALL_H
+#define _P_MBOX_CALL_H
+
+#include "peripherals/base.h"
+
+#define VIDEOCORE_MBOX (PBASE + 0x0000B880)
+#define MBOX_READ (VIDEOCORE_MBOX + 0x0)
+#define MBOX_POLL (VIDEOCORE_MBOX + 0x10)
+#define MBOX_SENDER (VIDEOCORE_MBOX + 0x14)
+#define MBOX_STATUS (VIDEOCORE_MBOX + 0x18)
+#define MBOX_CONFIG (VIDEOCORE_MBOX + 0x1C)
+#define MBOX_WRITE (VIDEOCORE_MBOX + 0x20)
+#define MBOX_RESPONSE 0x80000000
+#define MBOX_FULL 0x80000000
+#define MBOX_EMPTY 0x40000000
+
+#define MBOX_REQUEST 0
+
+/* channels */
+#define MBOX_CH_POWER 0
+#define MBOX_CH_FB 1
+#define MBOX_CH_VUART 2
+#define MBOX_CH_VCHIQ 3
+#define MBOX_CH_LEDS 4
+#define MBOX_CH_BTNS 5
+#define MBOX_CH_TOUCH 6
+#define MBOX_CH_COUNT 7
+#define MBOX_CH_PROP 8
+
+/* tags */
+#define MBOX_TAG_MODEL 0x10001
+#define MBOX_TAG_REVISION 0x10002
+#define MBOX_TAG_MAC_ADDRESS 0x10003
+#define MBOX_TAG_GETSERIAL 0x10004
+#define MBOX_TAG_ARM_MEMORY 0x10005
+#define MBOX_TAG_VC_MEMORY 0x10006
+#define MBOX_TAG_CLOCKS 0x10007
+#define MBOX_TAG_LAST 0
+
+#endif /* _P_MBOX_CALL_H */

Lab3/include/peripherals/mini_uart.h

@@ -0,0 +1,19 @@
+#ifndef _P_MINI_UART_H
+#define _P_MINI_UART_H
+
+#include "peripherals/base.h"
+
+#define AUX_ENABLES (PBASE + 0x00215004)
+#define AUX_MU_IO_REG (PBASE + 0x00215040)
+#define AUX_MU_IER_REG (PBASE + 0x00215044)
+#define AUX_MU_IIR_REG (PBASE + 0x00215048)
+#define AUX_MU_LCR_REG (PBASE + 0x0021504C)
+#define AUX_MU_MCR_REG (PBASE + 0x00215050)
+#define AUX_MU_LSR_REG (PBASE + 0x00215054)
+#define AUX_MU_MSR_REG (PBASE + 0x00215058)
+#define AUX_MU_SCRATCH (PBASE + 0x0021505C)
+#define AUX_MU_CNTL_REG (PBASE + 0x00215060)
+#define AUX_MU_STAT_REG (PBASE + 0x00215064)
+#define AUX_MU_BAUD_REG (PBASE + 0x00215068)
+
+#endif /*_P_MINI_UART_H */

Lab3/include/peripherals/reboot.h

@@ -0,0 +1,8 @@
+#ifndef _P_REBOOT_H
+#define _P_REBOOT_H
+
+#define PM_PASSWORD 0x5a000000
+#define PM_RSTC 0x3F10001c
+#define PM_WDOG 0x3F100024
+
+#endif /*_P_REBOOT_H */