add memory identity mapping when booting

zhangsn-19 · Jul 28, 2021 · 3ca86e0 · 3ca86e0
1 parent da91916
commit 3ca86e0
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Showing 2 changed files with 6 additions and 5 deletions.
diff --git a/linux-object/src/process.rs b/linux-object/src/process.rs
@@ -230,7 +230,7 @@ impl LinuxProcess {
         files.insert(2.into(), stdout);
 
         LinuxProcess {
-            root_inode: create_root_fs(rootfs),
+            root_inode: create_root_fs(rootfs), //Arc::clone(&ROOT_INODE),访问磁盘可能更快？
             parent: Weak::default(),
             inner: Mutex::new(LinuxProcessInner {
                 files,

diff --git a/zCore/src/arch/riscv/boot/entry64.asm b/zCore/src/arch/riscv/boot/entry64.asm
@@ -45,14 +45,15 @@ bootstacktop:
 	.section .data
 	.align 12 #12位对齐
 boot_page_table_sv39:
-	#1G的一个大页: 0xffffffff_00000000 --> 0x00000000
+	#1G的一个大页: 0x00000000_80000000 --> 0x80000000
 	#1G的一个大页: 0xffffffff_80000000 --> 0x80000000
 
 	#前510项置0
-	.zero 8 * 508
-
-	.quad (0x00000 << 10) | 0xef
 	.zero 8
+	.zero 8
+	.quad (0x80000 << 10) | 0xef #0x80000000 --> 0x80000000
+
+	.zero 8 * 507
 	#倒数第二项，PPN=0x80000(当转换为物理地址时还需左移12位), 标志位DAG_XWRV置1
 	.quad (0x80000 << 10) | 0xef
 	.zero 8