From 476943d2a547fb22f2fd1484a0109b1837d4be30 Mon Sep 17 00:00:00 2001
From: hahahazhangyan <3316749729@qq.com>
Date: Fri, 22 Dec 2023 21:20:11 +0800
Subject: [PATCH] boot

---
 .../kernel/base/vm/los_vm_boot.c              | 23 ++++++++++---------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/kernel_liteos_a-OpenHarmony-v3.1.7-Release/kernel/base/vm/los_vm_boot.c b/kernel_liteos_a-OpenHarmony-v3.1.7-Release/kernel/base/vm/los_vm_boot.c
index 81287a26..fdb31e61 100644
--- a/kernel_liteos_a-OpenHarmony-v3.1.7-Release/kernel/base/vm/los_vm_boot.c
+++ b/kernel_liteos_a-OpenHarmony-v3.1.7-Release/kernel/base/vm/los_vm_boot.c
@@ -38,46 +38,47 @@
 #include "los_vm_page.h"
 #include "los_arch_mmu.h"
 
-
+// 全局变量，代表启动内存的基地址，初始化为__bss_end的地址（通常是未初始化数据段的结束地址）
 UINTPTR g_vmBootMemBase = (UINTPTR)&__bss_end;
+// 全局变量，表示内核堆是否已初始化，初始化为FALSE
 BOOL g_kHeapInited = FALSE;
-
+// 启动内存分配函数，用于在系统启动阶段从启动内存中分配内存  
 VOID *OsVmBootMemAlloc(size_t len)
 {
     UINTPTR ptr;
-
+// 如果内核堆已经初始化，则不能使用启动内存分配，返回NULL并报错 
     if (g_kHeapInited) {
         VM_ERR("kernel heap has been initialized, do not to use boot memory allocation!");
         return NULL;
     }
-
+   // 对启动内存基地址进行对齐处理，然后更新基地址为分配后的下一个位置  
     ptr = LOS_Align(g_vmBootMemBase, sizeof(UINTPTR));
     g_vmBootMemBase = ptr + LOS_Align(len, sizeof(UINTPTR));
-
+// 返回分配的内存地址  
     return (VOID *)ptr;
 }
-
+// 系统内存初始化函数，用于初始化系统内存管理相关资源  
 UINT32 OsSysMemInit(VOID)
 {
     STATUS_T ret;
-
+ // 如果定义了LOSCFG_KERNEL_VM，则初始化内核的地址空间  
 #ifdef LOSCFG_KERNEL_VM
     OsKSpaceInit();
 #endif
-
+  // 初始化内核堆，如果失败则返回错误并报错  
     ret = OsKHeapInit(OS_KHEAP_BLOCK_SIZE);
     if (ret != LOS_OK) {
         VM_ERR("OsKHeapInit fail\n");
         return LOS_NOK;
     }
-
+  // 如果定义了LOSCFG_KERNEL_VM，则启动虚拟页和映射的初始化，然后设置内核堆为已初始化状态 
 #ifdef LOSCFG_KERNEL_VM
     OsVmPageStartup();
     g_kHeapInited = TRUE;
     OsInitMappingStartUp();
-#else
+#else  // 否则直接设置内核堆为已初始化状态  
     g_kHeapInited = TRUE;
 #endif
-
+ // 返回成功状态码  
     return LOS_OK;
 }