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🆕 内核线程（在kernel_thtread函数中调用test_mm会产生问题）

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fslongjin
2022-02-10 13:45:38 +08:00
parent 39ddc21ca5
commit 67633eb04e
12 changed files with 752 additions and 83 deletions
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135
kernel/common/glib.h
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@ -23,6 +23,19 @@
: "memory") // 在sfence指令前的写操作必须在sfence指令后的写操作前完成
#define io_lfence() __asm__ __volatile__("lfence\n\t" :: \
: "memory") // 在lfence指令前的读操作必须在lfence指令后的读操作前完成。
/**
* @brief 根据结构体变量内某个成员变量member的基地址，计算出该结构体变量的基地址
* @param ptr 指向结构体变量内的成员变量member的指针
* @param type 成员变量所在的结构体
* @param member 成员变量名
*
* 方法：使用ptr减去结构体内的偏移，得到结构体变量的基地址
*/
#define container_of(ptr, type, member) \
({ \
typeof(((type *)0)->member) *p = (ptr); \
(type *)((unsigned long)p - (unsigned long)&(((type *)0)->member)); \
})
// 定义类型的缩写
typedef unsigned long ul;
@ -100,6 +113,32 @@ static inline bool list_empty(struct List *entry)
return false;
}
/**
* @brief 获取链表的上一个元素
*
* @param entry
* @return 链表的上一个元素
*/
static inline struct List* list_prev(struct List *entry)
{
if(entry->prev!=NULL)
return entry->prev;
else return NULL;
}
/**
* @brief 获取链表的下一个元素
*
* @param entry
* @return 链表的下一个元素
*/
static inline struct List* list_next(struct List *entry)
{
if(entry->next!=NULL)
return entry->next;
else return NULL;
}
//计算字符串的长度（经过测试，该版本比采用repne/scasb汇编的运行速度快16.8%左右）
static inline int strlen(char *s)
{
@ -137,33 +176,32 @@ void *memset(void *dst, unsigned char C, ul Count)
/**
* @brief 内存拷贝函数
*
*
* @param dst 目标数组
* @param src 源数组
* @param Num 字节数
* @return void*
* @return void*
*/
void * memcpy(void *dst,void * src,long Num)
void *memcpy(void *dst, void *src, long Num)
{
int d0,d1,d2;
__asm__ __volatile__ ( "cld \n\t"
"rep \n\t"
"movsq \n\t"
"testb $4,%b4 \n\t"
"je 1f \n\t"
"movsl \n\t"
"1:\ttestb $2,%b4 \n\t"
"je 2f \n\t"
"movsw \n\t"
"2:\ttestb $1,%b4 \n\t"
"je 3f \n\t"
"movsb \n\t"
"3: \n\t"
:"=&c"(d0),"=&D"(d1),"=&S"(d2)
:"0"(Num/8),"q"(Num),"1"(src),"2"(dst)
:"memory"
);
return dst;
int d0, d1, d2;
__asm__ __volatile__("cld \n\t"
"rep \n\t"
"movsq \n\t"
"testb $4,%b4 \n\t"
"je 1f \n\t"
"movsl \n\t"
"1:\ttestb $2,%b4 \n\t"
"je 2f \n\t"
"movsw \n\t"
"2:\ttestb $1,%b4 \n\t"
"je 3f \n\t"
"movsb \n\t"
"3: \n\t"
: "=&c"(d0), "=&D"(d1), "=&S"(d2)
: "0"(Num / 8), "q"(Num), "1"(src), "2"(dst)
: "memory");
return dst;
}
void *memset_c(void *dst, unsigned char c, ul n)
{
@ -176,44 +214,43 @@ void *memset_c(void *dst, unsigned char c, ul n)
// 从io口读入8个bit
unsigned char io_in8(unsigned short port)
{
unsigned char ret = 0;
__asm__ __volatile__( "inb %%dx, %0 \n\t"
"mfence \n\t"
:"=a"(ret)
:"d"(port)
:"memory");
return ret;
unsigned char ret = 0;
__asm__ __volatile__("inb %%dx, %0 \n\t"
"mfence \n\t"
: "=a"(ret)
: "d"(port)
: "memory");
return ret;
}
// 从io口读入32个bit
unsigned int io_in32(unsigned short port)
{
unsigned int ret = 0;
__asm__ __volatile__( "inl %%dx, %0 \n\t"
"mfence \n\t"
:"=a"(ret)
:"d"(port)
:"memory");
return ret;
unsigned int ret = 0;
__asm__ __volatile__("inl %%dx, %0 \n\t"
"mfence \n\t"
: "=a"(ret)
: "d"(port)
: "memory");
return ret;
}
// 输出8个bit到输出端口
void io_out8(unsigned short port,unsigned char value)
void io_out8(unsigned short port, unsigned char value)
{
__asm__ __volatile__( "outb %0, %%dx \n\t"
"mfence \n\t"
:
:"a"(value),"d"(port)
:"memory");
__asm__ __volatile__("outb %0, %%dx \n\t"
"mfence \n\t"
:
: "a"(value), "d"(port)
: "memory");
}
// 输出32个bit到输出端口
void io_out32(unsigned short port,unsigned int value)
void io_out32(unsigned short port, unsigned int value)
{
__asm__ __volatile__( "outl %0, %%dx \n\t"
"mfence \n\t"
:
:"a"(value),"d"(port)
:"memory");
__asm__ __volatile__("outl %0, %%dx \n\t"
"mfence \n\t"
:
: "a"(value), "d"(port)
: "memory");
}