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Potentially a valid zero stage boot loader based on cva6.

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This commit is contained in:
Ross Thompson 2022-11-03 17:35:57 -05:00
parent 03f68a4cf5
commit 34cfc01d1c
11 changed files with 683 additions and 0 deletions
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112
tests/testsBP/zsbl/Makefile Normal file
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CEXT := c
CPPEXT := cpp
AEXT := s
SEXT := S
SRCEXT := \([$(CEXT)$(AEXT)$(SEXT)]\|$(CPPEXT)\)
OBJEXT := o
DEPEXT := d
SRCDIR := .
BUILDDIR := OBJ
SOURCES ?= $(shell find $(SRCDIR) -type f -regex ".*\.$(SRCEXT)" | sort)
OBJECTS := $(SOURCES:.$(CEXT)=.$(OBJEXT))
OBJECTS := $(OBJECTS:.$(AEXT)=.$(OBJEXT))
OBJECTS := $(OBJECTS:.$(SEXT)=.$(OBJEXT))
OBJECTS := $(OBJECTS:.$(CPPEXT)=.$(OBJEXT))
OBJECTS := $(patsubst $(SRCDIR)/%,$(BUILDDIR)/%,$(OBJECTS))
TARGETDIR := bin
TARGET := $(TARGETDIR)/fpga-test-sdc
ROOT := ..
LIBRARY_DIRS :=
LIBRARY_FILES :=
MARCH :=-march=rv64imfdc
MABI :=-mabi=lp64d
LINK_FLAGS :=$(MARCH) $(MABI) -nostartfiles
LINKER :=$(ROOT)/linker1000.x
AFLAGS =$(MARCH) $(MABI) -W
CFLAGS =$(MARCH) $(MABI) -mcmodel=medany -O2
AS=riscv64-unknown-elf-as
CC=riscv64-unknown-elf-gcc
AR=riscv64-unknown-elf-ar
#Default Make
all: directories $(TARGET).memfile
#Remake
remake: clean all
#Make the Directories
directories:
@mkdir -p $(TARGETDIR)
@mkdir -p $(BUILDDIR)
clean:
rm -rf $(BUILDDIR) $(TARGETDIR) *.memfile *.objdump
#Needed for building additional library projects
ifdef LIBRARY_DIRS
LIBS+=${LIBRARY_DIRS:%=-L%} ${LIBRARY_FILES:%=-l%}
INC+=${LIBRARY_DIRS:%=-I%}
${LIBRARY_DIRS}:
make -C $@ -j 1
.PHONY: $(LIBRARY_DIRS) $(TARGET)
endif
#Pull in dependency info for *existing* .o files
-include $(OBJECTS:.$(OBJEXT)=.$(DEPEXT))
#Link
$(TARGET): $(OBJECTS) $(LIBRARY_DIRS)
$(CC) $(LINK_FLAGS) -g -o $(TARGET) $(OBJECTS) ${LIBS} -T ${LINKER}
#Compile
$(BUILDDIR)/%.$(OBJEXT): $(SRCDIR)/%.$(CEXT)
@mkdir -p $(dir $@)
$(CC) $(CFLAGS) $(INC) -c -o $@ $< > $(BUILDDIR)/$*.list
@$(CC) $(CFLAGS) $(INC) -MM $(SRCDIR)/$*.$(CEXT) > $(BUILDDIR)/$*.$(DEPEXT)
@cp -f $(BUILDDIR)/$*.$(DEPEXT) $(BUILDDIR)/$*.$(DEPEXT).tmp
@sed -e 's|.*:|$(BUILDDIR)/$*.$(OBJEXT):|' < $(BUILDDIR)/$*.$(DEPEXT).tmp > $(BUILDDIR)/$*.$(DEPEXT)
@sed -e 's/.*://' -e 's/\\$$//' < $(BUILDDIR)/$*.$(DEPEXT).tmp | fmt -1 | sed -e 's/^ *//' -e 's/$$/:/' >> $(BUILDDIR)/$*.$(DEPEXT)
@rm -f $(BUILDDIR)/$*.$(DEPEXT).tmp
# gcc won't output dependencies for assembly files for some reason
# most asm files don't have dependencies so the echo will work for now.
$(BUILDDIR)/%.$(OBJEXT): $(SRCDIR)/%.$(AEXT)
@mkdir -p $(dir $@)
$(CC) $(CFLAGS) -c -o $@ $< > $(BUILDDIR)/$*.list
@echo $@: $< > $(BUILDDIR)/$*.$(DEPEXT)
$(BUILDDIR)/%.$(OBJEXT): $(SRCDIR)/%.$(SEXT)
@mkdir -p $(dir $@)
$(CC) $(CFLAGS) $(INC) -c -o $@ $< > $(BUILDDIR)/$*.list
@echo $@: $< > $(BUILDDIR)/$*.$(DEPEXT)
# C++
$(BUILDDIR)/%.$(OBJEXT): $(SRCDIR)/%.$(CPPEXT)
@mkdir -p $(dir $@)
$(CC) $(CFLAGS) $(INC) -c -o $@ $< > $(BUILDDIR)/$*.list
@$(CC) $(CFLAGS) $(INC) -MM $(SRCDIR)/$*.$(CPPEXT) > $(BUILDDIR)/$*.$(DEPEXT)
@cp -f $(BUILDDIR)/$*.$(DEPEXT) $(BUILDDIR)/$*.$(DEPEXT).tmp
@sed -e 's|.*:|$(BUILDDIR)/$*.$(OBJEXT):|' < $(BUILDDIR)/$*.$(DEPEXT).tmp > $(BUILDDIR)/$*.$(DEPEXT)
@sed -e 's/.*://' -e 's/\\$$//' < $(BUILDDIR)/$*.$(DEPEXT).tmp | fmt -1 | sed -e 's/^ *//' -e 's/$$/:/' >> $(BUILDDIR)/$*.$(DEPEXT)
@rm -f $(BUILDDIR)/$*.$(DEPEXT).tmp
# convert to hex
$(TARGET).memfile: $(TARGET)
@echo 'Making object dump file.'
@riscv64-unknown-elf-objdump -D $< > $<.objdump
@echo 'Making memory file'
riscv64-unknown-elf-elf2hex --bit-width 64 --input $^ --output $@
extractFunctionRadix.sh $<.objdump
mkdir -p ../../imperas-riscv-tests/work/rv64BP/
cp -f $(TARGETDIR)/* ../../imperas-riscv-tests/work/rv64BP/

98
tests/testsBP/zsbl/bios.s Normal file
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PERIOD = 11000000
#PERIOD = 20
.section .init
.global _start
.type _start, @function
_start:
# Initialize global pointer
.option push
.option norelax
1:auipc gp, %pcrel_hi(__global_pointer$)
addi gp, gp, %pcrel_lo(1b)
.option pop
li x1, 0
li x2, 0
li x4, 0
li x5, 0
li x6, 0
li x7, 0
li x8, 0
li x9, 0
li x10, 0
li x11, 0
li x12, 0
li x13, 0
li x14, 0
li x15, 0
li x16, 0
li x17, 0
li x18, 0
li x19, 0
li x20, 0
li x21, 0
li x22, 0
li x23, 0
li x24, 0
li x25, 0
li x26, 0
li x27, 0
li x28, 0
li x29, 0
li x30, 0
li x31, 0
# set the stack pointer to the top of memory - 8 bytes (pointer size)
li sp, 0x87FFFFF8
jal ra, main
fence.i
# now toggle led so we know the copy completed.
# write to gpio
li t2, 0xFF
la t3, 0x1006000C
li t4, 5
loop:
# delay
li t0, PERIOD/2
delay1:
addi t0, t0, -1
bge t0, x0, delay1
sw t2, 0x0(t3)
li t0, PERIOD/2
delay2:
addi t0, t0, -1
bge t0, x0, delay2
sw x0, 0x0(t3)
addi t4, t4, -1
bgt t4, x0, loop
# now that the card is copied and the led toggled we
# jump to the copied contents of the sd card.
jumpToLinux:
csrr a0, mhartid
li s0, 0x80000000
la a1, _dtb
jr s0
end_of_bios:
.section .dtb
.globl _dtb
.align 4, 0
_dtb:
.incbin "wally-vcu118.dtb"

40
tests/testsBP/zsbl/copyFlash.c Normal file
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///////////////////////////////////////////
// copyFlash.sv
//
// Written: Ross Thompson September 25, 2021
// Modified:
//
// Purpose: copies flash card into memory
//
// A component of the Wally configurable RISC-V project.
//
// Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,
// modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
// BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
// OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
///////////////////////////////////////////
#include "sdcDriver.h"
void copyFlash(long int blockAddr, long int * Dst, int numBlocks) {
setSDCCLK(4); // must be even, 1 gives no division.
waitInitSDC();
int index;
for(index = 0; index < numBlocks; index++) {
copySDC512(blockAddr+(index*512), Dst+(index*512/8));
}
}

119
tests/testsBP/zsbl/gpt.c Normal file
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#include "gpt.h"
#include "sdcDriver.h"
#include "uart.h"
#include <stddef.h>
int gpt_find_boot_partition(long int* dest, uint32_t size)
{
//int ret = init_sd();
int ret;
setSDCCLK(4); // must be even, 1 gives no division.
waitInitSDC();
ret = 0;
if (ret != 0) {
print_uart("could not initialize sd... exiting\r\n");
return -1;
}
print_uart("sd initialized!\r\n");
// load LBA1
size_t block_size = 512/8;
long int lba1_buf[block_size];
//int res = sd_copy(lba1_buf, 1, 1);
int res;
copySDC512(1, lba1_buf);
res = 0;
if (res != 0)
{
print_uart("SD card failed!\r\n");
print_uart("sd copy return value: ");
print_uart_addr(res);
print_uart("\r\n");
return -2;
}
gpt_pth_t *lba1 = (gpt_pth_t *)lba1_buf;
print_uart("gpt partition table header:");
print_uart("\r\n\tsignature:\t");
print_uart_addr(lba1->signature);
print_uart("\r\n\trevision:\t");
print_uart_int(lba1->revision);
print_uart("\r\n\tsize:\t\t");
print_uart_int(lba1->header_size);
print_uart("\r\n\tcrc_header:\t");
print_uart_int(lba1->crc_header);
print_uart("\r\n\treserved:\t");
print_uart_int(lba1->reserved);
print_uart("\r\n\tcurrent lba:\t");
print_uart_addr(lba1->current_lba);
print_uart("\r\n\tbackup lda:\t");
print_uart_addr(lba1->backup_lba);
print_uart("\r\n\tpartition entries lba: \t");
print_uart_addr(lba1->partition_entries_lba);
print_uart("\r\n\tnumber partition entries:\t");
print_uart_int(lba1->nr_partition_entries);
print_uart("\r\n\tsize partition entries: \t");
print_uart_int(lba1->size_partition_entry);
print_uart("\r\n");
long int lba2_buf[block_size];
//res = sd_copy(lba2_buf, lba1->partition_entries_lba, 1);
copySDC512(lba1->partition_entries_lba, lba2_buf);
res = 0;
if (res != 0)
{
print_uart("SD card failed!\r\n");
print_uart("sd copy return value: ");
print_uart_addr(res);
print_uart("\r\n");
return -2;
}
for (int i = 0; i < 4; i++)
{
partition_entries_t *part_entry = (partition_entries_t *)(lba2_buf + (i * 128));
print_uart("gpt partition entry ");
print_uart_byte(i);
print_uart("\r\n\tpartition type guid:\t");
for (int j = 0; j < 16; j++)
print_uart_byte(part_entry->partition_type_guid[j]);
print_uart("\r\n\tpartition guid: \t");
for (int j = 0; j < 16; j++)
print_uart_byte(part_entry->partition_guid[j]);
print_uart("\r\n\tfirst lba:\t");
print_uart_addr(part_entry->first_lba);
print_uart("\r\n\tlast lba:\t");
print_uart_addr(part_entry->last_lba);
print_uart("\r\n\tattributes:\t");
print_uart_addr(part_entry->attributes);
print_uart("\r\n\tname:\t");
for (int j = 0; j < 72; j++)
print_uart_byte(part_entry->name[j]);
print_uart("\r\n");
}
partition_entries_t *boot = (partition_entries_t *)(lba2_buf);
print_uart("copying boot image ");
//res = sd_copy(dest, boot->first_lba, boot->last_lba - boot->first_lba + 1);
copyFlash(boot->first_lba, dest, boot->last_lba - boot->first_lba + 1);
if (res != 0)
{
print_uart("SD card failed!\r\n");
print_uart("sd copy return value: ");
print_uart_addr(res);
print_uart("\r\n");
return -2;
}
print_uart(" done!\r\n");
return 0;
}

39
tests/testsBP/zsbl/gpt.h Normal file
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#pragma once
#include <stdint.h>
// LBA 0: Protective MBR
// ignored here
// Partition Table Header (LBA 1)
typedef struct gpt_pth
{
uint64_t signature;
uint32_t revision;
uint32_t header_size; //! little endian, usually 0x5c = 92
uint32_t crc_header;
uint32_t reserved; //! must be 0
uint64_t current_lba;
uint64_t backup_lba;
uint64_t first_usable_lba;
uint64_t last_usable_lba;
uint8_t disk_guid[16];
uint64_t partition_entries_lba;
uint32_t nr_partition_entries;
uint32_t size_partition_entry; //! usually 0x80 = 128
uint32_t crc_partition_entry;
} gpt_pth_t;
// Partition Entries (LBA 2-33)
typedef struct partition_entries
{
uint8_t partition_type_guid[16];
uint8_t partition_guid[16];
uint64_t first_lba;
uint64_t last_lba; //! inclusive
uint64_t attributes;
uint8_t name[72]; //! utf16 encoded
} partition_entries_t;
// Find boot partition and load it to the destination
int gpt_find_boot_partition(long int* dest, uint32_t size);

26
tests/testsBP/zsbl/main.c Normal file
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#include "uart.h"
#include "sdcDriver.h"
#include "gpt.h"
int main()
{
init_uart(30000000, 115200);
print_uart("Hello World!\r\n");
int res = gpt_find_boot_partition((long int *)0x80000000UL, 2 * 16384);
if (res == 0)
{
return 0;
}
while (1)
{
// do nothing
}
}
void handle_trap(void)
{
// print_uart("trap\r\n");
}

69
tests/testsBP/zsbl/sdcDriver.c Normal file
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///////////////////////////////////////////
// SDC.sv
//
// Written: Ross Thompson September 25, 2021
// Modified:
//
// Purpose: driver for sdc reader.
//
// A component of the Wally configurable RISC-V project.
//
// Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,
// modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
// BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
// OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
///////////////////////////////////////////
#include "sdcDriver.h"
#define SDC_MAIL_BOX 0x12100
void copySDC512(long int blockAddr, long int * Dst) {
waitInitSDC();
volatile long int * mailBoxAddr;
volatile int * mailBoxCmd;
volatile int * mailBoxStatus;
volatile long int * mailBoxReadData;
mailBoxStatus = (int *) (SDC_MAIL_BOX + 0x4);
mailBoxCmd = (int *) (SDC_MAIL_BOX + 0x8);
mailBoxAddr = (long int *) (SDC_MAIL_BOX + 0x10);
mailBoxReadData = (long int *) (SDC_MAIL_BOX + 0x18);
// write the SDC address register with the blockAddr
*mailBoxAddr = blockAddr;
*mailBoxCmd = 0x4;
// wait until the mailbox has valid data
// this occurs when status[1] = 0
while((*mailBoxStatus & 0x2) == 0x2);
int index;
for(index = 0; index < 512/8; index++) {
Dst[index] = *mailBoxReadData;
}
}
volatile void waitInitSDC(){
volatile int * mailBoxStatus;
mailBoxStatus = (int *) (SDC_MAIL_BOX + 0x4);
while((*mailBoxStatus & 0x1) != 0x1);
}
void setSDCCLK(int divider){
divider = (1 - (divider >> 1));
volatile int * mailBoxCLK;
mailBoxCLK = (int *) (SDC_MAIL_BOX + 0x0);
*mailBoxCLK = divider;
}

10
tests/testsBP/zsbl/sdcDriver.h Normal file
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#ifndef __SDCDRIVER_H
#define __SDCDRIVER_H
void copySDC512(long int, long int *);
volatile void waitInitSDC();
void setSDCCLK(int);
void copyFlash(long int, long int *, int);
#endif

52
tests/testsBP/zsbl/smp.h Normal file
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#pragma once
// The hart that non-SMP tests should run on
#ifndef NONSMP_HART
#define NONSMP_HART 0
#endif
// The maximum number of HARTs this code supports
#define CLINT_CTRL_ADDR 0x2000000
#ifndef MAX_HARTS
#define MAX_HARTS 256
#endif
#define CLINT_END_HART_IPI CLINT_CTRL_ADDR + (MAX_HARTS * 4)
/* If your test needs to temporarily block multiple-threads, do this:
* smp_pause(reg1, reg2)
* ... single-threaded work ...
* smp_resume(reg1, reg2)
* ... multi-threaded work ...
*/
#define smp_pause(reg1, reg2) \
li reg2, 0x8; \
csrw mie, reg2; \
li reg1, NONSMP_HART; \
csrr reg2, mhartid; \
bne reg1, reg2, 42f
#define smp_resume(reg1, reg2) \
li reg1, CLINT_CTRL_ADDR; \
41:; \
li reg2, 1; \
sw reg2, 0(reg1); \
addi reg1, reg1, 4; \
li reg2, CLINT_END_HART_IPI; \
blt reg1, reg2, 41b; \
42:; \
wfi; \
csrr reg2, mip; \
andi reg2, reg2, 0x8; \
beqz reg2, 42b; \
li reg1, CLINT_CTRL_ADDR; \
csrr reg2, mhartid; \
slli reg2, reg2, 2; \
add reg2, reg2, reg1; \
sw zero, 0(reg2); \
41:; \
lw reg2, 0(reg1); \
bnez reg2, 41b; \
addi reg1, reg1, 4; \
li reg2, CLINT_END_HART_IPI; \
blt reg1, reg2, 41b

91
tests/testsBP/zsbl/uart.c Normal file
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#include "uart.h"
void write_reg_u8(uintptr_t addr, uint8_t value)
{
volatile uint8_t *loc_addr = (volatile uint8_t *)addr;
*loc_addr = value;
}
uint8_t read_reg_u8(uintptr_t addr)
{
return *(volatile uint8_t *)addr;
}
int is_transmit_empty()
{
return read_reg_u8(UART_LINE_STATUS) & 0x20;
}
void write_serial(char a)
{
while (is_transmit_empty() == 0) {};
write_reg_u8(UART_THR, a);
}
void init_uart(uint32_t freq, uint32_t baud)
{
uint32_t divisor = freq / (baud << 4);
write_reg_u8(UART_INTERRUPT_ENABLE, 0x00); // Disable all interrupts
write_reg_u8(UART_LINE_CONTROL, 0x80); // Enable DLAB (set baud rate divisor)
write_reg_u8(UART_DLAB_LSB, divisor); // divisor (lo byte)
write_reg_u8(UART_DLAB_MSB, (divisor >> 8) & 0xFF); // divisor (hi byte)
write_reg_u8(UART_LINE_CONTROL, 0x03); // 8 bits, no parity, one stop bit
write_reg_u8(UART_FIFO_CONTROL, 0xC7); // Enable FIFO, clear them, with 14-byte threshold
write_reg_u8(UART_MODEM_CONTROL, 0x20); // Autoflow mode
}
void print_uart(const char *str)
{
const char *cur = &str[0];
while (*cur != '\0')
{
write_serial((uint8_t)*cur);
++cur;
}
}
uint8_t bin_to_hex_table[16] = {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
void bin_to_hex(uint8_t inp, uint8_t res[2])
{
res[1] = bin_to_hex_table[inp & 0xf];
res[0] = bin_to_hex_table[(inp >> 4) & 0xf];
return;
}
void print_uart_int(uint32_t addr)
{
int i;
for (i = 3; i > -1; i--)
{
uint8_t cur = (addr >> (i * 8)) & 0xff;
uint8_t hex[2];
bin_to_hex(cur, hex);
write_serial(hex[0]);
write_serial(hex[1]);
}
}
void print_uart_addr(uint64_t addr)
{
int i;
for (i = 7; i > -1; i--)
{
uint8_t cur = (addr >> (i * 8)) & 0xff;
uint8_t hex[2];
bin_to_hex(cur, hex);
write_serial(hex[0]);
write_serial(hex[1]);
}
}
void print_uart_byte(uint8_t byte)
{
uint8_t hex[2];
bin_to_hex(byte, hex);
write_serial(hex[0]);
write_serial(hex[1]);
}

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tests/testsBP/zsbl/uart.h Normal file
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#pragma once
#include <stdint.h>
#define UART_BASE 0x10000000
#define UART_RBR UART_BASE + 0
#define UART_THR UART_BASE + 0
#define UART_INTERRUPT_ENABLE UART_BASE + 4
#define UART_INTERRUPT_IDENT UART_BASE + 8
#define UART_FIFO_CONTROL UART_BASE + 8
#define UART_LINE_CONTROL UART_BASE + 12
#define UART_MODEM_CONTROL UART_BASE + 16
#define UART_LINE_STATUS UART_BASE + 20
#define UART_MODEM_STATUS UART_BASE + 24
#define UART_DLAB_LSB UART_BASE + 0
#define UART_DLAB_MSB UART_BASE + 4
void init_uart();
void print_uart(const char* str);
void print_uart_int(uint32_t addr);
void print_uart_addr(uint64_t addr);
void print_uart_byte(uint8_t byte);