Zhiyuan Shao
1 year ago
parent
38183534a3
commit
c4b07e8a00
@ -0,0 +1,74 @@
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// added @lab5_1.
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#include <string.h>
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#include "uart.h"
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//add
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#include "util/types.h"
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#include "spike_interface/dts_parse.h"
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volatile uint32* uart;
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void uart_putchar(uint8 ch)
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{
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volatile uint32 *status = (void*)(uintptr_t)0x60000008;
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volatile uint32 *tx = (void*)(uintptr_t)0x60000004;
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while (*status & 0x00000008);
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*tx = ch;
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}
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int uart_getchar()
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{
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volatile uint32 *rx = (void*)(uintptr_t)0x60000000;
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volatile uint32 *status = (void*)(uintptr_t)0x60000008;
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while (!(*status & 0x00000001));
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int32_t ch = *rx;
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return ch;
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}
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struct uart_scan
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{
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int compat;
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uint64 reg;
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};
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static void uart_open(const struct fdt_scan_node *node, void *extra)
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{
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struct uart_scan *scan = (struct uart_scan *)extra;
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memset(scan, 0, sizeof(*scan));
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}
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static void uart_prop(const struct fdt_scan_prop *prop, void *extra)
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{
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struct uart_scan *scan = (struct uart_scan *)extra;
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if (!strcmp(prop->name, "compatible") && fdt_string_list_index(prop, "sifive,uart0") >= 0) {
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scan->compat = 1;
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} else if (!strcmp(prop->name, "reg")) {
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fdt_get_address(prop->node->parent, prop->value, &scan->reg);
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}
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}
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static void uart_done(const struct fdt_scan_node *node, void *extra)
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{
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struct uart_scan *scan = (struct uart_scan *)extra;
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if (!scan->compat || !scan->reg || uart) return;
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// Enable Rx/Tx channels
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uart = (void*)(uintptr_t)scan->reg;
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uart[UART_REG_TXCTRL] = UART_TXEN;
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uart[UART_REG_RXCTRL] = UART_RXEN;
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}
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void query_uart(uintptr_t fdt)
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{
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struct fdt_cb cb;
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struct uart_scan scan;
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memset(&cb, 0, sizeof(cb));
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cb.open = uart_open;
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cb.prop = uart_prop;
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cb.done = uart_done;
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cb.extra = &scan;
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fdt_scan(fdt, &cb);
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}
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@ -0,0 +1,27 @@
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// added @lab5_1.
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#ifndef _RISCV_UART_H
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#define _RISCV_UART_H
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#include <stdint.h>
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//add
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#include "util/types.h"
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extern volatile uint32* uart;
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#define UART_REG_TXFIFO 0
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#define UART_REG_RXFIFO 1
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#define UART_REG_TXCTRL 2
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#define UART_REG_RXCTRL 3
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#define UART_REG_IE 4
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#define UART_REG_IP 5
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#define UART_REG_DIV 6
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#define UART_TXEN 0x1
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#define UART_RXEN 0x1
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void uart_putchar(uint8_t ch);
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int uart_getchar();
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void query_uart(uintptr_t dtb);
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#endif
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@ -1,94 +0,0 @@
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#include "user_lib.h"
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#include "util/string.h"
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#include "util/types.h"
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void ls(char *path) {
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int dir_fd = opendir_u(path);
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printu("------------------------------\n");
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printu("ls \"%s\":\n", path);
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printu("[name] [inode_num]\n");
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struct dir dir;
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int width = 20;
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while(readdir_u(dir_fd, &dir) == 0) {
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// we do not have %ms :(
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char name[width + 1];
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memset(name, ' ', width + 1);
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name[width] = '\0';
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if (strlen(dir.name) < width) {
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strcpy(name, dir.name);
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name[strlen(dir.name)] = ' ';
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printu("%s %d\n", name, dir.inum);
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}
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else
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printu("%s %d\n", dir.name, dir.inum);
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}
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printu("------------------------------\n");
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closedir_u(dir_fd);
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}
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int main(int argc, char *argv[]) {
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int MAXBUF = 512;
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char str[] = "hello world";
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char buf[MAXBUF];
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int fd1, fd2;
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printu("\n======== establish the file ========\n");
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fd1 = open("/RAMDISK0/ramfile", O_RDWR | O_CREAT);
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printu("create file: /RAMDISK0/ramfile\n");
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close(fd1);
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printu("\n======== Test 1: hard link ========\n");
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link_u("/RAMDISK0/ramfile", "/RAMDISK0/ramfile2");
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printu("create hard link: /RAMDISK0/ramfile2 -> /RAMDISK0/ramfile\n");
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fd1 = open("/RAMDISK0/ramfile", O_RDWR);
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fd2 = open("/RAMDISK0/ramfile2", O_RDWR);
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printu("file descriptor fd1 (ramfile): %d\n", fd1);
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printu("file descriptor fd2 (ramfile2): %d\n", fd2);
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// check the number of hard links to ramfile on disk
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struct istat st;
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disk_stat_u(fd1, &st);
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printu("ramfile hard links: %d\n", st.st_nlinks);
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if (st.st_nlinks != 2) {
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printu("ERROR: the number of hard links to ramfile should be 2, but it is %d\n",
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st.st_nlinks);
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exit(-1);
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}
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write_u(fd1, str, strlen(str));
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printu("/RAMDISK0/ramfile write content: \n%s\n", str);
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read_u(fd2, buf, MAXBUF);
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printu("/RAMDISK0/ramfile2 read content: \n%s\n", buf);
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close(fd1);
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close(fd2);
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printu("\n======== Test 2: unlink ========\n");
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ls("/RAMDISK0");
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unlink_u("/RAMDISK0/ramfile");
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printu("unlink: /RAMDISK0/ramfile\n");
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ls("/RAMDISK0");
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// check the number of hard links to ramfile2 on disk
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fd2 = open("/RAMDISK0/ramfile2", O_RDWR);
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disk_stat_u(fd2, &st);
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printu("ramfile2 hard links: %d\n", st.st_nlinks);
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if (st.st_nlinks != 1) {
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printu("ERROR: the number of hard links to ramfile should be 1, but it is %d\n",
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st.st_nlinks);
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exit(-1);
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}
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close(fd2);
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printu("\nAll tests passed!\n\n");
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exit(0);
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return 0;
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}
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@ -0,0 +1,20 @@
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/*
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* Below is the given application for lab5_1.
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* The goal of this app is to control the car via Bluetooth.
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*/
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#include "user_lib.h"
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#include "util/types.h"
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int main(void) {
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printu("please input the instruction through bluetooth!\n");
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while(1)
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{
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char temp = (char)uartgetchar();
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if(temp == 'q')
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break;
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car_control(temp);
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}
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exit(0);
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return 0;
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}
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