From: acevest <zhaoyanbai@126.com>
Date: Tue, 26 Sep 2023 15:08:17 +0000 (+0800)
Subject: 添加对串口输出的能力
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/doc/roff.3.ps?a=commitdiff_plain;h=9a5832659f2bcbd56363f9b49e6a671d364638ed;p=kernel.git

添加对串口输出的能力
---

diff --git a/Makefile b/Makefile
index be70137..2779a38 100644
--- a/Makefile
+++ b/Makefile
@@ -49,7 +49,7 @@ OBJS := $(patsubst %,%.o,$(SOURCE_FILES))
 ${KERNELBIN}: ${OBJS}
 	${LD} -z noexecstack -m elf_i386 -M -T$(LINKSCRIPT) $(OBJS) -o $@ > $(SYSTEMMAP)
 	nm -a $@ > kernel.sym
-	#rm kernel/setup.c.o
+	rm kernel/setup.c.o
 
 %.S.o: %.S ${HEADER_FILES}
 	${CC} ${CFLAGS} $< -o $@
diff --git a/boot/boot.c b/boot/boot.c
index be40f97..339d744 100644
--- a/boot/boot.c
+++ b/boot/boot.c
@@ -47,6 +47,7 @@ void boot_delay(int ticks) {
 #endif
 }
 
+void init_serial();
 void init_ttys();
 void setup_gdt();
 void setup_idt();
@@ -56,6 +57,8 @@ void setup_i8253(uint16_t);
 void setup_boot_irqs();
 
 void check_kernel(unsigned long addr, unsigned long magic) {
+    init_serial();
+
     init_ttys();
 
     printk("setup gdt\n");
diff --git a/drivers/ide.c b/drivers/ide.c
index 1ea6430..85284ef 100644
--- a/drivers/ide.c
+++ b/drivers/ide.c
@@ -109,7 +109,7 @@ void init_pci_controller(unsigned int classcode) {
     }
     assert(pci->intr_line < 16);
     if (pci != 0 && pci->intr_line < 16) {
-        printk("found pci %03d:%02d.%d #%02d %04X:%04X ProgIF %02x %s\n", pci->bus, pci->dev, pci->devfn,
+        printk("found pci %03d:%02d.%d #%02d %04X:%04X progif %02x %s\n", pci->bus, pci->dev, pci->devfn,
                pci->intr_line, pci->vendor, pci->device, pci->progif, pci_get_info(pci->classcode, pci->progif));
         // printk("found pci vendor %04x device %04x class %04x intr %d progif: %x\n", pci->vendor, pci->device,
         //        pci->classcode, pci->intr_line, pci->progif);
diff --git a/drivers/serial.c b/drivers/serial.c
new file mode 100644
index 0000000..b848681
--- /dev/null
+++ b/drivers/serial.c
@@ -0,0 +1,45 @@
+/*
+ * ------------------------------------------------------------------------
+ *   File Name: serial.c
+ *      Author: Zhao Yanbai
+ *              2023-09-26 21:03:27 Tuesday CST
+ * Description: none
+ * ------------------------------------------------------------------------
+ */
+
+#include "io.h"
+
+#define COMM1_PORT 0x3F8
+#define COMM2_PORT 0x2F8
+#define COMM3_PORT 0x3E8
+#define COMM4_PORT 0x2F8
+#define COMM5_PORT 0x5F8
+#define COMM6_PORT 0x4F8
+#define COMM7_PORT 0x5E8
+#define COMM8_PORT 0x4E8
+
+#define SERIAL_PORT COMM1_PORT
+
+void init_serial() {
+    uint32_t port = SERIAL_PORT;
+    outb(0x00, port + 1);  // 禁用中断
+    outb(0x80, port + 3);
+    outb(115200 / 9600, port + 0);
+    outb(0x00, port + 1);
+    outb(0x03, port + 3);
+    outb(0xC7, port + 2);
+    outb(0x0B, port + 4);
+}
+
+void serial_putc(char c) {
+    while ((inb(SERIAL_PORT + 5) & 0x20) == 0) {
+    }
+    outb(c, SERIAL_PORT);
+}
+
+void serial_write(const char *buf, size_t size) {
+    // return 0;
+    for (size_t i = 0; i < size; i++) {
+        serial_putc(buf[i]);
+    }
+}
diff --git a/gdbscript b/gdbscript
index 238cb70..9dd6925 100644
--- a/gdbscript
+++ b/gdbscript
@@ -13,10 +13,12 @@ target remote localhost:1234
 
 set pagination off
 
-b init_system_info
+#b init_serial
+
+#b init_system_info
 
 # finish 可以执行到当前函数返回处, 缩写 fin
-b setup_pci
+#b setup_pci
 
 #b setup_kernel
 #b e820_init_bootmem_data
diff --git a/kernel/printk.c b/kernel/printk.c
index d2c5d1a..6a0904d 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -20,6 +20,8 @@
 #include <tty.h>
 int vsprintf(char *buf, const char *fmt, char *args);
 
+void serial_write(const char *buf, size_t size);
+
 char pkbuf[1024];
 extern tty_t *const default_tty;
 int printk(const char *fmtstr, ...) {
@@ -28,6 +30,7 @@ int printk(const char *fmtstr, ...) {
     char *args = (char *)(((char *)&fmtstr) + 4);
     int size = vsprintf(pkbuf, fmtstr, args);
     tty_write(default_tty, pkbuf, (size_t)size);
+    serial_write(pkbuf, (size_t)size);
     irq_restore(iflags);
     return 0;
 }
@@ -40,6 +43,7 @@ int printd(const char *fmtstr, ...) {
     char *args = (char *)(((char *)&fmtstr) + 4);
     int size = vsprintf(pdbuf, fmtstr, args);
     tty_write(debug_tty, pdbuf, (size_t)size);
+    serial_write(pdbuf, (size_t)size);
     irq_restore(iflags);
     return 0;
 }
diff --git a/qemu.sh b/qemu.sh
index ac37fed..507dba6 100755
--- a/qemu.sh
+++ b/qemu.sh
@@ -9,6 +9,7 @@ qemu-system-i386 \
     -device ich9-ahci,id=ahci \
     &
 
+#   -serial tcp::8888,server,nowait \
 #    -device ich9-ahci,id=ahci \
 #    -machine accel=tcg \
 #    -serial stdio \