Lab3 and lab4

Lab3/kernel/Makefile

@@ -0,0 +1,42 @@
+ARMGNU ?= aarch64-linux-gnu
+
+COPS = -Iinclude -Wall -ffreestanding -fno-stack-protector  -nostdlib -nostartfiles -mgeneral-regs-only
+ASMOPS = -Iinclude -ggdb
+
+BUILD_DIR = build
+SRC_DIR = src
+
+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)
+
+all : kernel8.img
+
+clean :
+	rm -rf $(BUILD_DIR)/* *.img 
+
+run :
+	qemu-system-aarch64 -M raspi3b -serial null -serial stdio -display none -kernel kernel8.img -initrd initramfs.cpio -dtb bcm2710-rpi-3-b-plus.dtb
+
+test :
+	qemu-system-aarch64 -M raspi3b -serial null -serial stdio -display none -initrd initramfs.cpio -dtb bcm2710-rpi-3-b-plus.dtb -kernel kernel8.img -S -s
+
+gdb :
+	aarch64-linux-gnu-gdb build/kernel8.elf
+
+$(BUILD_DIR)/%_c.o: $(SRC_DIR)/%.c
+	$(ARMGNU)-gcc $(COPS) -MMD -c $< -o $@
+
+$(BUILD_DIR)/%_s.o: $(SRC_DIR)/%.S
+	$(ARMGNU)-gcc $(ASMOPS) -MMD -c $< -o $@
+
+kernel8.img: $(SRC_DIR)/linker.ld $(OBJ_FILES)
+	$(ARMGNU)-ld -T $(SRC_DIR)/linker.ld -Map $(BUILD_DIR)/kernel8.map -o $(BUILD_DIR)/kernel8.elf  $(OBJ_FILES)
+	$(ARMGNU)-objcopy $(BUILD_DIR)/kernel8.elf -O binary kernel8.img
+
+#qemu-system-aarch64 -M raspi3b -kernel kernel8.img -nographic -serial null -chardev stdio,id=uart1 -serial chardev:uart1 -monitor none
+

Lab3/kernel/README.md

@@ -0,0 +1,31 @@
+# OSC2024
+
+| Github Account | Student ID | Name          |
+|----------------|------------|---------------|
+|    nien-zhu    | 312515040  |  Nien-Chu Yu  |
+
+## Requirements
+
+* cross-compiler: aarch64-linux-gnu-gcc
+* Emulator: qemu-system-aarch64
+
+## Build 
+
+```
+make
+```
+
+## Debug 
+
+```
+make test
+make gdb
+```
+
+## Test With QEMU
+
+```
+make run 
+(qemu-system-aarch64 -M raspi3b -serial null -serial stdio -display none -kernel kernel8.img)
+```
+

Lab3/kernel/config.txt

@@ -0,0 +1 @@
+initramfs initramfs.cpio 0x20000000

Lab3/kernel/include/allocator.h

@@ -0,0 +1 @@
+void* simple_malloc(unsigned long size);

Lab3/kernel/include/cpio.h

@@ -0,0 +1,39 @@
+
+extern char * cpio_addr;
+
+void cpio_ls();
+void cpio_cat(char* filename);
+int cpio_TRAILER_compare(const char* str1);
+void cpio_load_program(char *filename);
+
+struct new_cpio_header {
+    // uses 8-byte	hexadecimal fields for all numbers
+    char c_magic[6];    //determine whether this archive is written with little-endian or big-endian integers.
+    char c_ino[8];      //determine when two entries refer to the same file.
+    char c_mode[8];     //specifies	both the regular permissions and the file type.
+    char c_uid[8];      // numeric user id
+    char c_gid[8];      // numeric group id
+    char c_nlink[8];    // number of links to this file.
+    char c_mtime[8];    // Modification time of the file
+    char c_filesize[8]; // size of the file
+    char c_devmajor[8];
+    char c_devminor[8];
+    char c_rdevmajor[8];
+    char c_rdevminor[8];
+    char c_namesize[8]; // number of bytes in the pathname
+    char c_check[8];    // always set to zero by writers and ignored by	readers.
+};
+
+struct old_cpio_header {
+    char    c_magic[6];
+    char    c_dev[6];
+    char    c_ino[6];
+    char    c_mode[6];
+    char    c_uid[6];
+    char    c_gid[6];
+    char    c_nlink[6];
+    char    c_rdev[6];
+    char    c_mtime[11];
+    char    c_namesize[6];
+    char    c_filesize[11];
+};

Lab3/kernel/include/dtb.h

@@ -0,0 +1,43 @@
+#include <stddef.h>
+#include <stdint.h>
+
+
+#define FDT_BEGIN_NODE (0x00000001)
+#define FDT_END_NODE (0x00000002)
+#define FDT_PROP (0x00000003)
+#define FDT_NOP (0x00000004)
+#define FDT_END (0x00000009)
+
+typedef void (*fdt_callback)(int node,const char* name,const void* data,uint32_t size);
+
+uint32_t fdt_u32_le2be (const void *addr);
+int fdt_traverse(fdt_callback cb, void* _dtb);
+int struct_parse(fdt_callback cb, uintptr_t cur_ptr, uintptr_t strings_ptr,uint32_t totalsize);
+void get_cpio_addr(int token,const char* name,const void* data,uint32_t size);
+void print_dtb(int token, const char* name, const void* data, uint32_t size);
+void data_parse(const char* name, const void* data, uint32_t len);
+
+
+
+struct fdt_header {
+    uint32_t magic;
+    uint32_t totalsize;
+    uint32_t off_dt_struct;
+    uint32_t off_dt_strings;
+    uint32_t off_mem_rsvmap;
+    uint32_t version;
+    uint32_t last_comp_version;
+    uint32_t boot_cpuid_phys;
+    uint32_t size_dt_strings;
+    uint32_t size_dt_struct;
+};
+
+struct fdt_reserve_entry {
+    uint64_t address;
+    uint64_t size;
+};
+
+struct fdt_property{
+    uint32_t len;
+    uint32_t nameoff;
+};

Lab3/kernel/include/except_c.h

@@ -0,0 +1,4 @@
+void exception_entry();
+void core_timer_exception_entry();
+void irq_exception_entry();
+void test_entry();

Lab3/kernel/include/gpio.h

@@ -0,0 +1,38 @@
+#ifndef GPIO_H
+#define GPIO_H
+
+#include <stdint.h>
+
+#define MMIO_BASE       0x3F000000
+
+#define GPFSEL0         ((volatile unsigned int*)(MMIO_BASE+0x00200000))
+#define GPFSEL1         ((volatile unsigned int*)(MMIO_BASE+0x00200004))
+#define GPFSEL2         ((volatile unsigned int*)(MMIO_BASE+0x00200008))
+#define GPFSEL3         ((volatile unsigned int*)(MMIO_BASE+0x0020000C))
+#define GPFSEL4         ((volatile unsigned int*)(MMIO_BASE+0x00200010))
+#define GPFSEL5         ((volatile unsigned int*)(MMIO_BASE+0x00200014))
+#define GPSET0          ((volatile unsigned int*)(MMIO_BASE+0x0020001C))
+#define GPSET1          ((volatile unsigned int*)(MMIO_BASE+0x00200020))
+#define GPCLR0          ((volatile unsigned int*)(MMIO_BASE+0x00200028))
+#define GPLEV0          ((volatile unsigned int*)(MMIO_BASE+0x00200034))
+#define GPLEV1          ((volatile unsigned int*)(MMIO_BASE+0x00200038))
+#define GPEDS0          ((volatile unsigned int*)(MMIO_BASE+0x00200040))
+#define GPEDS1          ((volatile unsigned int*)(MMIO_BASE+0x00200044))
+#define GPHEN0          ((volatile unsigned int*)(MMIO_BASE+0x00200064))
+#define GPHEN1          ((volatile unsigned int*)(MMIO_BASE+0x00200068))
+#define GPPUD           ((volatile unsigned int*)(MMIO_BASE+0x00200094))
+#define GPPUDCLK0       ((volatile unsigned int*)(MMIO_BASE+0x00200098))
+#define GPPUDCLK1       ((volatile unsigned int*)(MMIO_BASE+0x0020009C))
+
+// Helper function to write data to a memory-mapped I/O address
+static inline void mmio_write(volatile uint32_t* reg, uint32_t data) {
+    *reg = data;
+}
+
+// Helper function to read data from a memory-mapped I/O address
+static inline uint32_t mmio_read(volatile uint32_t* reg) {
+    return *reg;
+}
+
+
+#endif

Lab3/kernel/include/interrupt.h

@@ -0,0 +1,21 @@
+#include "gpio.h"
+
+
+#define IRQ_BASIC_PENDING		((volatile unsigned int*)(MMIO_BASE+0x0000B200))
+#define IRQ_PENDING_1		((volatile unsigned int*)(MMIO_BASE+0x0000B204))
+#define IRQ_PENDING_2		((volatile unsigned int*)(MMIO_BASE+0x0000B208))
+#define FIQ_CONTROL		((volatile unsigned int*)(MMIO_BASE+0x0000B20C))
+#define ENABLE_IRQS_1		((volatile unsigned int*)(MMIO_BASE+0x0000B210))
+#define ENABLE_IRQS_2		((volatile unsigned int*)(MMIO_BASE+0x0000B214))
+#define ENABLE_BASIC_IRQS		((volatile unsigned int*)(MMIO_BASE+0x0000B218))
+#define DISABLE_IRQS_1		((volatile unsigned int*)(MMIO_BASE+0x0000B21C))
+#define DISABLE_IRQS_2		((volatile unsigned int*)(MMIO_BASE+0x0000B220))
+#define DISABLE_BASIC_IRQS		((volatile unsigned int*)(MMIO_BASE+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)
+
+void enable_interrupt();
+void disable_interrupt();

Lab3/kernel/include/mailbox.h

@@ -0,0 +1,42 @@
+#include "gpio.h"
+
+extern volatile unsigned int mailbox[36];
+
+
+
+/* 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_GETBOARD  0x00010002
+#define MBOX_REQUEST       0x00000000
+#define MBOX_TAG_GETSERIAL 0x00010004
+#define TAG_REQUEST_CODE   0x00000000
+#define MBOX_TAG_GETARMMEM 0x00010005
+#define MBOX_TAG_LAST      0x00000000
+#define END_TAG            0x00000000
+
+int mailbox_call();
+void get_board_revision();
+void get_arm_mem();
+
+#define VIDEOCORE_MBOX  (MMIO_BASE+0xB880)
+#define MBOX_READ       ((volatile unsigned int*)(VIDEOCORE_MBOX+0x0))
+#define MBOX_POLL       ((volatile unsigned int*)(VIDEOCORE_MBOX+0x10))
+#define MBOX_SENDER     ((volatile unsigned int*)(VIDEOCORE_MBOX+0x14))
+#define MBOX_STATUS     ((volatile unsigned int*)(VIDEOCORE_MBOX+0x18))
+#define MBOX_CONFIG     ((volatile unsigned int*)(VIDEOCORE_MBOX+0x1C))
+#define MBOX_WRITE      ((volatile unsigned int*)(VIDEOCORE_MBOX+0x20))
+#define MBOX_RESPONSE   0x80000000
+#define MBOX_FULL       0x80000000
+#define MBOX_EMPTY      0x40000000
+#define REQUEST_SUCCEED     0x80000000
+#define REQUEST_FAILED      0x80000001

Lab3/kernel/include/printf.h

@@ -0,0 +1,106 @@
+/*
+File: printf.h
+
+Copyright (C) 2004  Kustaa Nyholm
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+See the GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+This library is realy just two files: 'printf.h' and 'printf.c'.
+
+They provide a simple and small (+200 loc) printf functionality to
+be used in embedded systems.
+
+I've found them so usefull in debugging that I do not bother with a
+debugger at all.
+
+They are distributed in source form, so to use them, just compile them
+into your project.
+
+Two printf variants are provided: printf and sprintf.
+
+The formats supported by this implementation are: 'd' 'u' 'c' 's' 'x' 'X'.
+
+Zero padding and field width are also supported.
+
+If the library is compiled with 'PRINTF_SUPPORT_LONG' defined then the
+long specifier is also
+supported. Note that this will pull in some long math routines (pun intended!)
+and thus make your executable noticably longer.
+
+The memory foot print of course depends on the target cpu, compiler and
+compiler options, but a rough guestimate (based on a H8S target) is about
+1.4 kB for code and some twenty 'int's and 'char's, say 60 bytes of stack space.
+Not too bad. Your milage may vary. By hacking the source code you can
+get rid of some hunred bytes, I'm sure, but personally I feel the balance of
+functionality and flexibility versus  code size is close to optimal for
+many embedded systems.
+
+To use the printf you need to supply your own character output function,
+something like :
+
+	void putc ( void* p, char c)
+		{
+		while (!SERIAL_PORT_EMPTY) ;
+		SERIAL_PORT_TX_REGISTER = c;
+		}
+
+Before you can call printf you need to initialize it to use your
+character output function with something like:
+
+	init_printf(NULL,putc);
+
+Notice the 'NULL' in 'init_printf' and the parameter 'void* p' in 'putc',
+the NULL (or any pointer) you pass into the 'init_printf' will eventually be
+passed to your 'putc' routine. This allows you to pass some storage space (or
+anything realy) to the character output function, if necessary.
+This is not often needed but it was implemented like that because it made
+implementing the sprintf function so neat (look at the source code).
+
+The code is re-entrant, except for the 'init_printf' function, so it
+is safe to call it from interupts too, although this may result in mixed output.
+If you rely on re-entrancy, take care that your 'putc' function is re-entrant!
+
+The printf and sprintf functions are actually macros that translate to
+'tfp_printf' and 'tfp_sprintf'. This makes it possible
+to use them along with 'stdio.h' printf's in a single source file.
+You just need to undef the names before you include the 'stdio.h'.
+Note that these are not function like macros, so if you have variables
+or struct members with these names, things will explode in your face.
+Without variadic macros this is the best we can do to wrap these
+fucnction. If it is a problem just give up the macros and use the
+functions directly or rename them.
+
+For further details see source code.
+
+regs Kusti, 23.10.2004
+*/
+
+
+#ifndef __TFP_PRINTF__
+#define __TFP_PRINTF__
+
+#include <stdarg.h>
+
+void init_printf(void* putp,void (*putf) (void*,char));
+
+void tfp_printf(char *fmt, ...);
+void tfp_sprintf(char* s,char *fmt, ...);
+
+void tfp_format(void* putp,void (*putf) (void*,char),char *fmt, va_list va);
+
+#define printf tfp_printf
+#define sprintf tfp_sprintf
+
+#endif

Lab3/kernel/include/reboot.h

@@ -0,0 +1,7 @@
+#define PM_PASSWORD 0x5a000000
+#define PM_RSTC 0x3F10001c
+#define PM_WDOG 0x3F100024
+
+void set(long addr, unsigned int value);
+void reset(int tick);
+void cancel_reset();

Lab3/kernel/include/shell.h

@@ -0,0 +1 @@
+void shell();