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Merge pull request s-matyukevich#172 from stefanJi/feat/stefanji_lesson01_2
feat: implement lesson01-2
2 parents 4b151a2 + c3f4b0f commit 4f7c9bf

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‎exercises/lesson01/2/stefanji/Makefile‎

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ARMGNU ?= aarch64-linux-gnu
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COPS = -Wall -nostdlib -nostartfiles -ffreestanding -Iinclude -mgeneral-regs-only
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ASMOPS = -Iinclude
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BUILD_DIR = build
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SRC_DIR = src
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all : kernel8.img
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clean :
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rm -rf $(BUILD_DIR) *.img
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$(BUILD_DIR)/%_c.o: $(SRC_DIR)/%.c
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mkdir -p $(@D)
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$(ARMGNU)-gcc $(COPS) -MMD -c $< -o $@
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$(BUILD_DIR)/%_s.o: $(SRC_DIR)/%.S
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$(ARMGNU)-gcc $(ASMOPS) -MMD -c $< -o $@
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C_FILES = $(wildcard $(SRC_DIR)/*.c)
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ASM_FILES = $(wildcard $(SRC_DIR)/*.S)
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OBJ_FILES = $(C_FILES:$(SRC_DIR)/%.c=$(BUILD_DIR)/%_c.o)
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OBJ_FILES += $(ASM_FILES:$(SRC_DIR)/%.S=$(BUILD_DIR)/%_s.o)
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DEP_FILES = $(OBJ_FILES:%.o=%.d)
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-include $(DEP_FILES)
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kernel8.img: $(SRC_DIR)/linker.ld $(OBJ_FILES)
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$(ARMGNU)-ld -T $(SRC_DIR)/linker.ld -o $(BUILD_DIR)/kernel8.elf $(OBJ_FILES)
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$(ARMGNU)-objcopy $(BUILD_DIR)/kernel8.elf -O binary kernel8.img

‎exercises/lesson01/2/stefanji/build.bat‎

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docker run --rm -v %cd%:/app -w /app smatyukevich/raspberry-pi-os-builder make %1

‎exercises/lesson01/2/stefanji/build.sh‎

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#!/bin/bash
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docker run --rm -v $(pwd):/app -w /app smatyukevich/raspberry-pi-os-builder make $1

‎exercises/lesson01/2/stefanji/include/mm.h‎

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

‎exercises/lesson01/2/stefanji/include/peripherals/base.h‎

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#ifndef _P_BASE_H
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#define _P_BASE_H
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#define PBASE 0x3F000000
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#endif /*_P_BASE_H */

‎exercises/lesson01/2/stefanji/include/peripherals/gpio.h‎

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#ifndef _P_GPIO_H
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#define _P_GPIO_H
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#include "peripherals/base.h"
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#define GPFSEL1 (PBASE+0x00200004)
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#define GPSET0 (PBASE+0x0020001C)
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#define GPCLR0 (PBASE+0x00200028)
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#define GPPUD (PBASE+0x00200094)
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#define GPPUDCLK0 (PBASE+0x00200098)
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#endif /*_P_GPIO_H */

‎exercises/lesson01/2/stefanji/include/peripherals/uart_pl011.h‎

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#ifndef _P_UART_PL011_H
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#define _P_UART_PL011_H
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#include "base.h"
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#define PL011_BASE (PBASE+0x00201000)
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#define PL011_DR (PL011_BASE+0x00)
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#define PL011_RSRECR (PL011_BASE+0x04)
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#define PL011_FR (PL011_BASE+0x18)
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#define PL011_ILPR (PL011_BASE+0x20)
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#define PL011_IBRD (PL011_BASE+0x24)
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#define PL011_FBRD (PL011_BASE+0x28)
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#define PL011_LCRH (PL011_BASE+0x2c)
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#define PL011_CR (PL011_BASE+0x30)
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#define PL011_IFLS (PL011_BASE+0x34)
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#define PL011_IMSC (PL011_BASE+0x38)
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#define PL011_RIS (PL011_BASE+0x3c)
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#define PL011_MIS (PL011_BASE+0x40)
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#define PL011_ICR (PL011_BASE+0x44)
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#define PL011_DMACR (PL011_BASE+0x48)
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#define PL011_ITCR (PL011_BASE+0x80)
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#define PL011_ITIP (PL011_BASE+0x84)
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#define PL011_ITOP (PL011_BASE+0x88)
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#define PL011_TDR (PL011_BASE+0x8c)
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#endif
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‎exercises/lesson01/2/stefanji/include/pl011_uart.h‎

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#ifndef _MINI_UART_H
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#define _MINI_UART_H
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void uart_init ( void );
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char uart_recv ( void );
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void uart_send ( char c );
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void uart_send_string(char* str);
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#endif /*_MINI_UART_H */

‎exercises/lesson01/2/stefanji/include/utils.h‎

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#ifndef _BOOT_H
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#define _BOOT_H
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extern void delay ( unsigned long);
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extern void put32 ( unsigned long, unsigned int );
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extern unsigned int get32 ( unsigned long );
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#endif /*_BOOT_H */

‎exercises/lesson01/2/stefanji/src/boot.S‎

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#include "mm.h"
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.section ".text.boot"
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.globl _start
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_start:
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mrs x0, mpidr_el1
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and x0, x0,#0xFF // Check processor id
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cbz x0, master // Hang for all non-primary CPU
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b proc_hang
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proc_hang:
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b proc_hang
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master:
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adr x0, bss_begin
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adr x1, bss_end
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sub x1, x1, x0
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bl memzero
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mov sp, #LOW_MEMORY
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bl kernel_main
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b proc_hang // should never come here

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