🔧 启用SSE

kernel/common/printk.c

@@ -51,10 +51,11 @@ int init_printk(const int char_size_x, const int char_size_y)
     
     // @todo:将来需要将帧缓冲区物理地址填写到这个地址的页表项中
     pos.FB_address = 0xa00000;  
-    pos.FB_length = info.framebuffer_pitch - info.framebuffer_addr;
+    pos.FB_length = pos.width*pos.height*4;
 
     pos.x = 0;
     pos.y = 0;
+
     return 0;
 }
 

kernel/head.S

@@ -453,7 +453,15 @@ SetUp_TSS64:
     // 装载任务状态段寄存器(已改为在main.c中使用load_TR宏进行装载)
     // mov $0x50, %ax // 设置起始地址为80
     // ltr %ax
-
+    
+    //now enable SSE and the like
+    movq %cr0, %rax
+    and $0xFFFB, %ax		//clear coprocessor emulation CR0.EM
+    or $0x2, %ax			//set coprocessor monitoring  CR0.MP
+    movq %rax, %cr0
+    movq %cr4, %rax
+    or $(3 << 9), %ax		//set CR4.OSFXSR and CR4.OSXMMEXCPT at the same time
+    movq %rax, %cr4
 
     call Start_Kernel
 

run.sh

@@ -93,7 +93,7 @@ if [ $flag_can_run -eq 1 ]; then
         bochs -q -f ${bochsrc} -rc ./tools/bochsinit
     else
         qemu-system-x86_64 -cdrom ${iso} -m 128M \
-        -monitor telnet::2333,server,nowait -serial stdio
+        -monitor telnet::2333,server,nowait -serial stdio -s
     fi
 else
   echo "不满足运行条件"