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This commit is contained in:
chyyuu 2012-09-14 21:36:57 +08:00
parent c417874aa8
commit 92c553113b
32 changed files with 506 additions and 1809 deletions
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2
code/lab2/kern/mm/memlayout.h
View File

@ -97,7 +97,7 @@ struct e820map {
* that convert Page to other data types, such as phyical address. * that convert Page to other data types, such as phyical address.
* */ * */
struct Page { struct Page {
atomic_t ref; // page frame's reference counter int ref; // page frame's reference counter
uint32_t flags; // array of flags that describe the status of the page frame uint32_t flags; // array of flags that describe the status of the page frame
unsigned int property; // the num of free block, used in first fit pm manager unsigned int property; // the num of free block, used in first fit pm manager
list_entry_t page_link; // free list link list_entry_t page_link; // free list link

10
code/lab2/kern/mm/pmm.h
View File

@ -117,22 +117,24 @@ pde2page(pde_t pde) {
static inline int static inline int
page_ref(struct Page *page) { page_ref(struct Page *page) {
return atomic_read(&(page->ref)); return page->ref;
} }
static inline void static inline void
set_page_ref(struct Page *page, int val) { set_page_ref(struct Page *page, int val) {
atomic_set(&(page->ref), val); page->ref = val;
} }
static inline int static inline int
page_ref_inc(struct Page *page) { page_ref_inc(struct Page *page) {
return atomic_add_return(&(page->ref), 1); page->ref += 1;
return page->ref;
} }
static inline int static inline int
page_ref_dec(struct Page *page) { page_ref_dec(struct Page *page) {
return atomic_sub_return(&(page->ref), 1); page->ref -= 1;
return page->ref;
} }
extern char bootstack[], bootstacktop[]; extern char bootstack[], bootstacktop[];

194
code/lab2/libs/atomic.h
View File

@ -3,167 +3,9 @@
/* Atomic operations that C can't guarantee us. Useful for resource counting etc.. */ /* Atomic operations that C can't guarantee us. Useful for resource counting etc.. */
typedef struct {
volatile int counter;
} atomic_t;
static inline int atomic_read(const atomic_t *v) __attribute__((always_inline));
static inline void atomic_set(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_add(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_sub(atomic_t *v, int i) __attribute__((always_inline));
static inline bool atomic_sub_test_zero(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_inc(atomic_t *v) __attribute__((always_inline));
static inline void atomic_dec(atomic_t *v) __attribute__((always_inline));
static inline bool atomic_inc_test_zero(atomic_t *v) __attribute__((always_inline));
static inline bool atomic_dec_test_zero(atomic_t *v) __attribute__((always_inline));
static inline int atomic_add_return(atomic_t *v, int i) __attribute__((always_inline));
static inline int atomic_sub_return(atomic_t *v, int i) __attribute__((always_inline));
/* *
* atomic_read - read atomic variable
* @v: pointer of type atomic_t
*
* Atomically reads the value of @v.
* */
static inline int
atomic_read(const atomic_t *v) {
return v->counter;
}
/* *
* atomic_set - set atomic variable
* @v: pointer of type atomic_t
* @i: required value
*
* Atomically sets the value of @v to @i.
* */
static inline void
atomic_set(atomic_t *v, int i) {
v->counter = i;
}
/* *
* atomic_add - add integer to atomic variable
* @v: pointer of type atomic_t
* @i: integer value to add
*
* Atomically adds @i to @v.
* */
static inline void
atomic_add(atomic_t *v, int i) {
asm volatile ("addl %1, %0" : "+m" (v->counter) : "ir" (i));
}
/* *
* atomic_sub - subtract integer from atomic variable
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v.
* */
static inline void
atomic_sub(atomic_t *v, int i) {
asm volatile("subl %1, %0" : "+m" (v->counter) : "ir" (i));
}
/* *
* atomic_sub_test_zero - subtract value from variable and test result
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v and
* returns true if the result is zero, or false for all other cases.
* */
static inline bool
atomic_sub_test_zero(atomic_t *v, int i) {
unsigned char c;
asm volatile("subl %2, %0; sete %1" : "+m" (v->counter), "=qm" (c) : "ir" (i) : "memory");
return c != 0;
}
/* *
* atomic_inc - increment atomic variable
* @v: pointer of type atomic_t
*
* Atomically increments @v by 1.
* */
static inline void
atomic_inc(atomic_t *v) {
asm volatile("incl %0" : "+m" (v->counter));
}
/* *
* atomic_dec - decrement atomic variable
* @v: pointer of type atomic_t
*
* Atomically decrements @v by 1.
* */
static inline void
atomic_dec(atomic_t *v) {
asm volatile("decl %0" : "+m" (v->counter));
}
/* *
* atomic_inc_test_zero - increment and test
* @v: pointer of type atomic_t
*
* Atomically increments @v by 1 and
* returns true if the result is zero, or false for all other cases.
* */
static inline bool
atomic_inc_test_zero(atomic_t *v) {
unsigned char c;
asm volatile("incl %0; sete %1" : "+m" (v->counter), "=qm" (c) :: "memory");
return c != 0;
}
/* *
* atomic_dec_test_zero - decrement and test
* @v: pointer of type atomic_t
*
* Atomically decrements @v by 1 and
* returns true if the result is 0, or false for all other cases.
* */
static inline bool
atomic_dec_test_zero(atomic_t *v) {
unsigned char c;
asm volatile("decl %0; sete %1" : "+m" (v->counter), "=qm" (c) :: "memory");
return c != 0;
}
/* *
* atomic_add_return - add integer and return
* @i: integer value to add
* @v: pointer of type atomic_t
*
* Atomically adds @i to @v and returns @i + @v
* Requires Modern 486+ processor
* */
static inline int
atomic_add_return(atomic_t *v, int i) {
int __i = i;
asm volatile("xaddl %0, %1" : "+r" (i), "+m" (v->counter) :: "memory");
return i + __i;
}
/* *
* atomic_sub_return - subtract integer and return
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v and returns @v - @i
* */
static inline int
atomic_sub_return(atomic_t *v, int i) {
return atomic_add_return(v, -i);
}
static inline void set_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void set_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline void clear_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void clear_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline void change_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void change_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_set_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_clear_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_change_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline bool test_bit(int nr, volatile void *addr) __attribute__((always_inline));
/* * /* *
@ -199,42 +41,6 @@ change_bit(int nr, volatile void *addr) {
asm volatile ("btcl %1, %0" :"=m" (*(volatile long *)addr) : "Ir" (nr)); asm volatile ("btcl %1, %0" :"=m" (*(volatile long *)addr) : "Ir" (nr));
} }
/* *
* test_and_set_bit - Atomically set a bit and return its old value
* @nr: the bit to set
* @addr: the address to count from
* */
static inline bool
test_and_set_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btsl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
return oldbit != 0;
}
/* *
* test_and_clear_bit - Atomically clear a bit and return its old value
* @nr: the bit to clear
* @addr: the address to count from
* */
static inline bool
test_and_clear_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btrl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
return oldbit != 0;
}
/* *
* test_and_change_bit - Atomically change a bit and return its old value
* @nr: the bit to change
* @addr: the address to count from
* */
static inline bool
test_and_change_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btcl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
return oldbit != 0;
}
/* * /* *
* test_bit - Determine whether a bit is set * test_bit - Determine whether a bit is set
* @nr: the bit to test * @nr: the bit to test

2
code/lab3/kern/mm/memlayout.h
View File

@ -98,7 +98,7 @@ struct e820map {
* that convert Page to other data types, such as phyical address. * that convert Page to other data types, such as phyical address.
* */ * */
struct Page { struct Page {
atomic_t ref; // page frame's reference counter int ref; // page frame's reference counter
uint32_t flags; // array of flags that describe the status of the page frame uint32_t flags; // array of flags that describe the status of the page frame
unsigned int property; // the num of free block, used in first fit pm manager unsigned int property; // the num of free block, used in first fit pm manager
list_entry_t page_link; // free list link list_entry_t page_link; // free list link

10
code/lab3/kern/mm/pmm.h
View File

@ -118,22 +118,24 @@ pde2page(pde_t pde) {
static inline int static inline int
page_ref(struct Page *page) { page_ref(struct Page *page) {
return atomic_read(&(page->ref)); return page->ref;
} }
static inline void static inline void
set_page_ref(struct Page *page, int val) { set_page_ref(struct Page *page, int val) {
atomic_set(&(page->ref), val); page->ref = val;
} }
static inline int static inline int
page_ref_inc(struct Page *page) { page_ref_inc(struct Page *page) {
return atomic_add_return(&(page->ref), 1); page->ref += 1;
return page->ref;
} }
static inline int static inline int
page_ref_dec(struct Page *page) { page_ref_dec(struct Page *page) {
return atomic_sub_return(&(page->ref), 1); page->ref -= 1;
return page->ref;
} }
extern char bootstack[], bootstacktop[]; extern char bootstack[], bootstacktop[];

194
code/lab3/libs/atomic.h
View File

@ -3,167 +3,9 @@
/* Atomic operations that C can't guarantee us. Useful for resource counting etc.. */ /* Atomic operations that C can't guarantee us. Useful for resource counting etc.. */
typedef struct {
volatile int counter;
} atomic_t;
static inline int atomic_read(const atomic_t *v) __attribute__((always_inline));
static inline void atomic_set(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_add(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_sub(atomic_t *v, int i) __attribute__((always_inline));
static inline bool atomic_sub_test_zero(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_inc(atomic_t *v) __attribute__((always_inline));
static inline void atomic_dec(atomic_t *v) __attribute__((always_inline));
static inline bool atomic_inc_test_zero(atomic_t *v) __attribute__((always_inline));
static inline bool atomic_dec_test_zero(atomic_t *v) __attribute__((always_inline));
static inline int atomic_add_return(atomic_t *v, int i) __attribute__((always_inline));
static inline int atomic_sub_return(atomic_t *v, int i) __attribute__((always_inline));
/* *
* atomic_read - read atomic variable
* @v: pointer of type atomic_t
*
* Atomically reads the value of @v.
* */
static inline int
atomic_read(const atomic_t *v) {
return v->counter;
}
/* *
* atomic_set - set atomic variable
* @v: pointer of type atomic_t
* @i: required value
*
* Atomically sets the value of @v to @i.
* */
static inline void
atomic_set(atomic_t *v, int i) {
v->counter = i;
}
/* *
* atomic_add - add integer to atomic variable
* @v: pointer of type atomic_t
* @i: integer value to add
*
* Atomically adds @i to @v.
* */
static inline void
atomic_add(atomic_t *v, int i) {
asm volatile ("addl %1, %0" : "+m" (v->counter) : "ir" (i));
}
/* *
* atomic_sub - subtract integer from atomic variable
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v.
* */
static inline void
atomic_sub(atomic_t *v, int i) {
asm volatile("subl %1, %0" : "+m" (v->counter) : "ir" (i));
}
/* *
* atomic_sub_test_zero - subtract value from variable and test result
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v and
* returns true if the result is zero, or false for all other cases.
* */
static inline bool
atomic_sub_test_zero(atomic_t *v, int i) {
unsigned char c;
asm volatile("subl %2, %0; sete %1" : "+m" (v->counter), "=qm" (c) : "ir" (i) : "memory");
return c != 0;
}
/* *
* atomic_inc - increment atomic variable
* @v: pointer of type atomic_t
*
* Atomically increments @v by 1.
* */
static inline void
atomic_inc(atomic_t *v) {
asm volatile("incl %0" : "+m" (v->counter));
}
/* *
* atomic_dec - decrement atomic variable
* @v: pointer of type atomic_t
*
* Atomically decrements @v by 1.
* */
static inline void
atomic_dec(atomic_t *v) {
asm volatile("decl %0" : "+m" (v->counter));
}
/* *
* atomic_inc_test_zero - increment and test
* @v: pointer of type atomic_t
*
* Atomically increments @v by 1 and
* returns true if the result is zero, or false for all other cases.
* */
static inline bool
atomic_inc_test_zero(atomic_t *v) {
unsigned char c;
asm volatile("incl %0; sete %1" : "+m" (v->counter), "=qm" (c) :: "memory");
return c != 0;
}
/* *
* atomic_dec_test_zero - decrement and test
* @v: pointer of type atomic_t
*
* Atomically decrements @v by 1 and
* returns true if the result is 0, or false for all other cases.
* */
static inline bool
atomic_dec_test_zero(atomic_t *v) {
unsigned char c;
asm volatile("decl %0; sete %1" : "+m" (v->counter), "=qm" (c) :: "memory");
return c != 0;
}
/* *
* atomic_add_return - add integer and return
* @i: integer value to add
* @v: pointer of type atomic_t
*
* Atomically adds @i to @v and returns @i + @v
* Requires Modern 486+ processor
* */
static inline int
atomic_add_return(atomic_t *v, int i) {
int __i = i;
asm volatile("xaddl %0, %1" : "+r" (i), "+m" (v->counter) :: "memory");
return i + __i;
}
/* *
* atomic_sub_return - subtract integer and return
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v and returns @v - @i
* */
static inline int
atomic_sub_return(atomic_t *v, int i) {
return atomic_add_return(v, -i);
}
static inline void set_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void set_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline void clear_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void clear_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline void change_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void change_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_set_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_clear_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_change_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline bool test_bit(int nr, volatile void *addr) __attribute__((always_inline));
/* * /* *
@ -199,42 +41,6 @@ change_bit(int nr, volatile void *addr) {
asm volatile ("btcl %1, %0" :"=m" (*(volatile long *)addr) : "Ir" (nr)); asm volatile ("btcl %1, %0" :"=m" (*(volatile long *)addr) : "Ir" (nr));
} }
/* *
* test_and_set_bit - Atomically set a bit and return its old value
* @nr: the bit to set
* @addr: the address to count from
* */
static inline bool
test_and_set_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btsl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
return oldbit != 0;
}
/* *
* test_and_clear_bit - Atomically clear a bit and return its old value
* @nr: the bit to clear
* @addr: the address to count from
* */
static inline bool
test_and_clear_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btrl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
return oldbit != 0;
}
/* *
* test_and_change_bit - Atomically change a bit and return its old value
* @nr: the bit to change
* @addr: the address to count from
* */
static inline bool
test_and_change_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btcl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
return oldbit != 0;
}
/* * /* *
* test_bit - Determine whether a bit is set * test_bit - Determine whether a bit is set
* @nr: the bit to test * @nr: the bit to test

2
code/lab4/kern/mm/memlayout.h
View File

@ -98,7 +98,7 @@ struct e820map {
* that convert Page to other data types, such as phyical address. * that convert Page to other data types, such as phyical address.
* */ * */
struct Page { struct Page {
atomic_t ref; // page frame's reference counter int ref; // page frame's reference counter
uint32_t flags; // array of flags that describe the status of the page frame uint32_t flags; // array of flags that describe the status of the page frame
unsigned int property; // used in buddy system, stores the order (the X in 2^X) of the continuous memory block unsigned int property; // used in buddy system, stores the order (the X in 2^X) of the continuous memory block
int zone_num; // used in buddy system, the No. of zone which the page belongs to int zone_num; // used in buddy system, the No. of zone which the page belongs to

10
code/lab4/kern/mm/pmm.h
View File

@ -122,22 +122,24 @@ pde2page(pde_t pde) {
static inline int static inline int
page_ref(struct Page *page) { page_ref(struct Page *page) {
return atomic_read(&(page->ref)); return page->ref;
} }
static inline void static inline void
set_page_ref(struct Page *page, int val) { set_page_ref(struct Page *page, int val) {
atomic_set(&(page->ref), val); page->ref = val;
} }
static inline int static inline int
page_ref_inc(struct Page *page) { page_ref_inc(struct Page *page) {
return atomic_add_return(&(page->ref), 1); page->ref += 1;
return page->ref;
} }
static inline int static inline int
page_ref_dec(struct Page *page) { page_ref_dec(struct Page *page) {
return atomic_sub_return(&(page->ref), 1); page->ref -= 1;
return page->ref;
} }
extern char bootstack[], bootstacktop[]; extern char bootstack[], bootstacktop[];

194
code/lab4/libs/atomic.h
View File

@ -3,167 +3,9 @@
/* Atomic operations that C can't guarantee us. Useful for resource counting etc.. */ /* Atomic operations that C can't guarantee us. Useful for resource counting etc.. */
typedef struct {
volatile int counter;
} atomic_t;
static inline int atomic_read(const atomic_t *v) __attribute__((always_inline));
static inline void atomic_set(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_add(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_sub(atomic_t *v, int i) __attribute__((always_inline));
static inline bool atomic_sub_test_zero(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_inc(atomic_t *v) __attribute__((always_inline));
static inline void atomic_dec(atomic_t *v) __attribute__((always_inline));
static inline bool atomic_inc_test_zero(atomic_t *v) __attribute__((always_inline));
static inline bool atomic_dec_test_zero(atomic_t *v) __attribute__((always_inline));
static inline int atomic_add_return(atomic_t *v, int i) __attribute__((always_inline));
static inline int atomic_sub_return(atomic_t *v, int i) __attribute__((always_inline));
/* *
* atomic_read - read atomic variable
* @v: pointer of type atomic_t
*
* Atomically reads the value of @v.
* */
static inline int
atomic_read(const atomic_t *v) {
return v->counter;
}
/* *
* atomic_set - set atomic variable
* @v: pointer of type atomic_t
* @i: required value
*
* Atomically sets the value of @v to @i.
* */
static inline void
atomic_set(atomic_t *v, int i) {
v->counter = i;
}
/* *
* atomic_add - add integer to atomic variable
* @v: pointer of type atomic_t
* @i: integer value to add
*
* Atomically adds @i to @v.
* */
static inline void
atomic_add(atomic_t *v, int i) {
asm volatile ("addl %1, %0" : "+m" (v->counter) : "ir" (i));
}
/* *
* atomic_sub - subtract integer from atomic variable
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v.
* */
static inline void
atomic_sub(atomic_t *v, int i) {
asm volatile("subl %1, %0" : "+m" (v->counter) : "ir" (i));
}
/* *
* atomic_sub_test_zero - subtract value from variable and test result
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v and
* returns true if the result is zero, or false for all other cases.
* */
static inline bool
atomic_sub_test_zero(atomic_t *v, int i) {
unsigned char c;
asm volatile("subl %2, %0; sete %1" : "+m" (v->counter), "=qm" (c) : "ir" (i) : "memory");
return c != 0;
}
/* *
* atomic_inc - increment atomic variable
* @v: pointer of type atomic_t
*
* Atomically increments @v by 1.
* */
static inline void
atomic_inc(atomic_t *v) {
asm volatile("incl %0" : "+m" (v->counter));
}
/* *
* atomic_dec - decrement atomic variable
* @v: pointer of type atomic_t
*
* Atomically decrements @v by 1.
* */
static inline void
atomic_dec(atomic_t *v) {
asm volatile("decl %0" : "+m" (v->counter));
}
/* *
* atomic_inc_test_zero - increment and test
* @v: pointer of type atomic_t
*
* Atomically increments @v by 1 and
* returns true if the result is zero, or false for all other cases.
* */
static inline bool
atomic_inc_test_zero(atomic_t *v) {
unsigned char c;
asm volatile("incl %0; sete %1" : "+m" (v->counter), "=qm" (c) :: "memory");
return c != 0;
}
/* *
* atomic_dec_test_zero - decrement and test
* @v: pointer of type atomic_t
*
* Atomically decrements @v by 1 and
* returns true if the result is 0, or false for all other cases.
* */
static inline bool
atomic_dec_test_zero(atomic_t *v) {
unsigned char c;
asm volatile("decl %0; sete %1" : "+m" (v->counter), "=qm" (c) :: "memory");
return c != 0;
}
/* *
* atomic_add_return - add integer and return
* @i: integer value to add
* @v: pointer of type atomic_t
*
* Atomically adds @i to @v and returns @i + @v
* Requires Modern 486+ processor
* */
static inline int
atomic_add_return(atomic_t *v, int i) {
int __i = i;
asm volatile("xaddl %0, %1" : "+r" (i), "+m" (v->counter) :: "memory");
return i + __i;
}
/* *
* atomic_sub_return - subtract integer and return
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v and returns @v - @i
* */
static inline int
atomic_sub_return(atomic_t *v, int i) {
return atomic_add_return(v, -i);
}
static inline void set_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void set_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline void clear_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void clear_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline void change_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void change_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_set_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_clear_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_change_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline bool test_bit(int nr, volatile void *addr) __attribute__((always_inline));
/* * /* *
@ -199,42 +41,6 @@ change_bit(int nr, volatile void *addr) {
asm volatile ("btcl %1, %0" :"=m" (*(volatile long *)addr) : "Ir" (nr)); asm volatile ("btcl %1, %0" :"=m" (*(volatile long *)addr) : "Ir" (nr));
} }
/* *
* test_and_set_bit - Atomically set a bit and return its old value
* @nr: the bit to set
* @addr: the address to count from
* */
static inline bool
test_and_set_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btsl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
return oldbit != 0;
}
/* *
* test_and_clear_bit - Atomically clear a bit and return its old value
* @nr: the bit to clear
* @addr: the address to count from
* */
static inline bool
test_and_clear_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btrl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
return oldbit != 0;
}
/* *
* test_and_change_bit - Atomically change a bit and return its old value
* @nr: the bit to change
* @addr: the address to count from
* */
static inline bool
test_and_change_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btcl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
return oldbit != 0;
}
/* * /* *
* test_bit - Determine whether a bit is set * test_bit - Determine whether a bit is set
* @nr: the bit to test * @nr: the bit to test

2
code/lab5/kern/mm/memlayout.h
View File

@ -127,7 +127,7 @@ struct e820map {
* that convert Page to other data types, such as phyical address. * that convert Page to other data types, such as phyical address.
* */ * */
struct Page { struct Page {
atomic_t ref; // page frame's reference counter int ref; // page frame's reference counter
uint32_t flags; // array of flags that describe the status of the page frame uint32_t flags; // array of flags that describe the status of the page frame
unsigned int property; // used in buddy system, stores the order (the X in 2^X) of the continuous memory block unsigned int property; // used in buddy system, stores the order (the X in 2^X) of the continuous memory block
int zone_num; // used in buddy system, the No. of zone which the page belongs to int zone_num; // used in buddy system, the No. of zone which the page belongs to

10
code/lab5/kern/mm/pmm.h
View File

@ -121,22 +121,24 @@ pde2page(pde_t pde) {
static inline int static inline int
page_ref(struct Page *page) { page_ref(struct Page *page) {
return atomic_read(&(page->ref)); return page->ref;
} }
static inline void static inline void
set_page_ref(struct Page *page, int val) { set_page_ref(struct Page *page, int val) {
atomic_set(&(page->ref), val); page->ref = val;
} }
static inline int static inline int
page_ref_inc(struct Page *page) { page_ref_inc(struct Page *page) {
return atomic_add_return(&(page->ref), 1); page->ref += 1;
return page->ref;
} }
static inline int static inline int
page_ref_dec(struct Page *page) { page_ref_dec(struct Page *page) {
return atomic_sub_return(&(page->ref), 1); page->ref -= 1;
return page->ref;
} }
extern char bootstack[], bootstacktop[]; extern char bootstack[], bootstacktop[];

12
code/lab5/kern/mm/vmm.h
View File

@ -33,7 +33,7 @@ struct mm_struct {
pde_t *pgdir; // the PDT of these vma pde_t *pgdir; // the PDT of these vma
int map_count; // the count of these vma int map_count; // the count of these vma
void *sm_priv; // the private data for swap manager void *sm_priv; // the private data for swap manager
atomic_t mm_count; // the number ofprocess which shared the mm int mm_count; // the number ofprocess which shared the mm
lock_t mm_lock; // mutex for using dup_mmap fun to duplicat the mm lock_t mm_lock; // mutex for using dup_mmap fun to duplicat the mm
}; };
@ -64,22 +64,24 @@ bool copy_to_user(struct mm_struct *mm, void *dst, const void *src, size_t len);
static inline int static inline int
mm_count(struct mm_struct *mm) { mm_count(struct mm_struct *mm) {
return atomic_read(&(mm->mm_count)); return mm->mm_count;
} }
static inline void static inline void
set_mm_count(struct mm_struct *mm, int val) { set_mm_count(struct mm_struct *mm, int val) {
atomic_set(&(mm->mm_count), val); mm->mm_count = val;
} }
static inline int static inline int
mm_count_inc(struct mm_struct *mm) { mm_count_inc(struct mm_struct *mm) {
return atomic_add_return(&(mm->mm_count), 1); mm->mm_count += 1;
return mm->mm_count;
} }
static inline int static inline int
mm_count_dec(struct mm_struct *mm) { mm_count_dec(struct mm_struct *mm) {
return atomic_sub_return(&(mm->mm_count), 1); mm->mm_count -= 1;
return mm->mm_count;
} }
static inline void static inline void

194
code/lab5/libs/atomic.h
View File

@ -3,167 +3,9 @@
/* Atomic operations that C can't guarantee us. Useful for resource counting etc.. */ /* Atomic operations that C can't guarantee us. Useful for resource counting etc.. */
typedef struct {
volatile int counter;
} atomic_t;
static inline int atomic_read(const atomic_t *v) __attribute__((always_inline));
static inline void atomic_set(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_add(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_sub(atomic_t *v, int i) __attribute__((always_inline));
static inline bool atomic_sub_test_zero(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_inc(atomic_t *v) __attribute__((always_inline));
static inline void atomic_dec(atomic_t *v) __attribute__((always_inline));
static inline bool atomic_inc_test_zero(atomic_t *v) __attribute__((always_inline));
static inline bool atomic_dec_test_zero(atomic_t *v) __attribute__((always_inline));
static inline int atomic_add_return(atomic_t *v, int i) __attribute__((always_inline));
static inline int atomic_sub_return(atomic_t *v, int i) __attribute__((always_inline));
/* *
* atomic_read - read atomic variable
* @v: pointer of type atomic_t
*
* Atomically reads the value of @v.
* */
static inline int
atomic_read(const atomic_t *v) {
return v->counter;
}
/* *
* atomic_set - set atomic variable
* @v: pointer of type atomic_t
* @i: required value
*
* Atomically sets the value of @v to @i.
* */
static inline void
atomic_set(atomic_t *v, int i) {
v->counter = i;
}
/* *
* atomic_add - add integer to atomic variable
* @v: pointer of type atomic_t
* @i: integer value to add
*
* Atomically adds @i to @v.
* */
static inline void
atomic_add(atomic_t *v, int i) {
asm volatile ("addl %1, %0" : "+m" (v->counter) : "ir" (i));
}
/* *
* atomic_sub - subtract integer from atomic variable
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v.
* */
static inline void
atomic_sub(atomic_t *v, int i) {
asm volatile("subl %1, %0" : "+m" (v->counter) : "ir" (i));
}
/* *
* atomic_sub_test_zero - subtract value from variable and test result
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v and
* returns true if the result is zero, or false for all other cases.
* */
static inline bool
atomic_sub_test_zero(atomic_t *v, int i) {
unsigned char c;
asm volatile("subl %2, %0; sete %1" : "+m" (v->counter), "=qm" (c) : "ir" (i) : "memory");
return c != 0;
}
/* *
* atomic_inc - increment atomic variable
* @v: pointer of type atomic_t
*
* Atomically increments @v by 1.
* */
static inline void
atomic_inc(atomic_t *v) {
asm volatile("incl %0" : "+m" (v->counter));
}
/* *
* atomic_dec - decrement atomic variable
* @v: pointer of type atomic_t
*
* Atomically decrements @v by 1.
* */
static inline void
atomic_dec(atomic_t *v) {
asm volatile("decl %0" : "+m" (v->counter));
}
/* *
* atomic_inc_test_zero - increment and test
* @v: pointer of type atomic_t
*
* Atomically increments @v by 1 and
* returns true if the result is zero, or false for all other cases.
* */
static inline bool
atomic_inc_test_zero(atomic_t *v) {
unsigned char c;
asm volatile("incl %0; sete %1" : "+m" (v->counter), "=qm" (c) :: "memory");
return c != 0;
}
/* *
* atomic_dec_test_zero - decrement and test
* @v: pointer of type atomic_t
*
* Atomically decrements @v by 1 and
* returns true if the result is 0, or false for all other cases.
* */
static inline bool
atomic_dec_test_zero(atomic_t *v) {
unsigned char c;
asm volatile("decl %0; sete %1" : "+m" (v->counter), "=qm" (c) :: "memory");
return c != 0;
}
/* *
* atomic_add_return - add integer and return
* @i: integer value to add
* @v: pointer of type atomic_t
*
* Atomically adds @i to @v and returns @i + @v
* Requires Modern 486+ processor
* */
static inline int
atomic_add_return(atomic_t *v, int i) {
int __i = i;
asm volatile("xaddl %0, %1" : "+r" (i), "+m" (v->counter) :: "memory");
return i + __i;
}
/* *
* atomic_sub_return - subtract integer and return
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v and returns @v - @i
* */
static inline int
atomic_sub_return(atomic_t *v, int i) {
return atomic_add_return(v, -i);
}
static inline void set_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void set_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline void clear_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void clear_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline void change_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void change_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_set_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_clear_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_change_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline bool test_bit(int nr, volatile void *addr) __attribute__((always_inline));
/* * /* *
@ -199,42 +41,6 @@ change_bit(int nr, volatile void *addr) {
asm volatile ("btcl %1, %0" :"=m" (*(volatile long *)addr) : "Ir" (nr)); asm volatile ("btcl %1, %0" :"=m" (*(volatile long *)addr) : "Ir" (nr));
} }
/* *
* test_and_set_bit - Atomically set a bit and return its old value
* @nr: the bit to set
* @addr: the address to count from
* */
static inline bool
test_and_set_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btsl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
return oldbit != 0;
}
/* *
* test_and_clear_bit - Atomically clear a bit and return its old value
* @nr: the bit to clear
* @addr: the address to count from
* */
static inline bool
test_and_clear_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btrl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
return oldbit != 0;
}
/* *
* test_and_change_bit - Atomically change a bit and return its old value
* @nr: the bit to change
* @addr: the address to count from
* */
static inline bool
test_and_change_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btcl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
return oldbit != 0;
}
/* * /* *
* test_bit - Determine whether a bit is set * test_bit - Determine whether a bit is set
* @nr: the bit to test * @nr: the bit to test

2
code/lab6/kern/mm/memlayout.h
View File

@ -127,7 +127,7 @@ struct e820map {
* that convert Page to other data types, such as phyical address. * that convert Page to other data types, such as phyical address.
* */ * */
struct Page { struct Page {
atomic_t ref; // page frame's reference counter int ref; // page frame's reference counter
uint32_t flags; // array of flags that describe the status of the page frame uint32_t flags; // array of flags that describe the status of the page frame
unsigned int property; // used in buddy system, stores the order (the X in 2^X) of the continuous memory block unsigned int property; // used in buddy system, stores the order (the X in 2^X) of the continuous memory block
int zone_num; // used in buddy system, the No. of zone which the page belongs to int zone_num; // used in buddy system, the No. of zone which the page belongs to

10
code/lab6/kern/mm/pmm.h
View File

@ -121,22 +121,24 @@ pde2page(pde_t pde) {
static inline int static inline int
page_ref(struct Page *page) { page_ref(struct Page *page) {
return atomic_read(&(page->ref)); return page->ref;
} }
static inline void static inline void
set_page_ref(struct Page *page, int val) { set_page_ref(struct Page *page, int val) {
atomic_set(&(page->ref), val); page->ref = val;
} }
static inline int static inline int
page_ref_inc(struct Page *page) { page_ref_inc(struct Page *page) {
return atomic_add_return(&(page->ref), 1); page->ref += 1;
return page->ref;
} }
static inline int static inline int
page_ref_dec(struct Page *page) { page_ref_dec(struct Page *page) {
return atomic_sub_return(&(page->ref), 1); page->ref -= 1;
return page->ref;
} }
extern char bootstack[], bootstacktop[]; extern char bootstack[], bootstacktop[];

12
code/lab6/kern/mm/vmm.h
View File

@ -33,7 +33,7 @@ struct mm_struct {
pde_t *pgdir; // the PDT of these vma pde_t *pgdir; // the PDT of these vma
int map_count; // the count of these vma int map_count; // the count of these vma
void *sm_priv; // the private data for swap manager void *sm_priv; // the private data for swap manager
atomic_t mm_count; // the number ofprocess which shared the mm int mm_count; // the number ofprocess which shared the mm
lock_t mm_lock; // mutex for using dup_mmap fun to duplicat the mm lock_t mm_lock; // mutex for using dup_mmap fun to duplicat the mm
}; };
@ -64,22 +64,24 @@ bool copy_to_user(struct mm_struct *mm, void *dst, const void *src, size_t len);
static inline int static inline int
mm_count(struct mm_struct *mm) { mm_count(struct mm_struct *mm) {
return atomic_read(&(mm->mm_count)); return mm->mm_count;
} }
static inline void static inline void
set_mm_count(struct mm_struct *mm, int val) { set_mm_count(struct mm_struct *mm, int val) {
atomic_set(&(mm->mm_count), val); mm->mm_count = val;
} }
static inline int static inline int
mm_count_inc(struct mm_struct *mm) { mm_count_inc(struct mm_struct *mm) {
return atomic_add_return(&(mm->mm_count), 1); mm->mm_count += 1;
return mm->mm_count;
} }
static inline int static inline int
mm_count_dec(struct mm_struct *mm) { mm_count_dec(struct mm_struct *mm) {
return atomic_sub_return(&(mm->mm_count), 1); mm->mm_count -= 1;
return mm->mm_count;
} }
static inline void static inline void

194
code/lab6/libs/atomic.h
View File

@ -3,167 +3,9 @@
/* Atomic operations that C can't guarantee us. Useful for resource counting etc.. */ /* Atomic operations that C can't guarantee us. Useful for resource counting etc.. */
typedef struct {
volatile int counter;
} atomic_t;
static inline int atomic_read(const atomic_t *v) __attribute__((always_inline));
static inline void atomic_set(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_add(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_sub(atomic_t *v, int i) __attribute__((always_inline));
static inline bool atomic_sub_test_zero(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_inc(atomic_t *v) __attribute__((always_inline));
static inline void atomic_dec(atomic_t *v) __attribute__((always_inline));
static inline bool atomic_inc_test_zero(atomic_t *v) __attribute__((always_inline));
static inline bool atomic_dec_test_zero(atomic_t *v) __attribute__((always_inline));
static inline int atomic_add_return(atomic_t *v, int i) __attribute__((always_inline));
static inline int atomic_sub_return(atomic_t *v, int i) __attribute__((always_inline));
/* *
* atomic_read - read atomic variable
* @v: pointer of type atomic_t
*
* Atomically reads the value of @v.
* */
static inline int
atomic_read(const atomic_t *v) {
return v->counter;
}
/* *
* atomic_set - set atomic variable
* @v: pointer of type atomic_t
* @i: required value
*
* Atomically sets the value of @v to @i.
* */
static inline void
atomic_set(atomic_t *v, int i) {
v->counter = i;
}
/* *
* atomic_add - add integer to atomic variable
* @v: pointer of type atomic_t
* @i: integer value to add
*
* Atomically adds @i to @v.
* */
static inline void
atomic_add(atomic_t *v, int i) {
asm volatile ("addl %1, %0" : "+m" (v->counter) : "ir" (i));
}
/* *
* atomic_sub - subtract integer from atomic variable
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v.
* */
static inline void
atomic_sub(atomic_t *v, int i) {
asm volatile("subl %1, %0" : "+m" (v->counter) : "ir" (i));
}
/* *
* atomic_sub_test_zero - subtract value from variable and test result
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v and
* returns true if the result is zero, or false for all other cases.
* */
static inline bool
atomic_sub_test_zero(atomic_t *v, int i) {
unsigned char c;
asm volatile("subl %2, %0; sete %1" : "+m" (v->counter), "=qm" (c) : "ir" (i) : "memory");
return c != 0;
}
/* *
* atomic_inc - increment atomic variable
* @v: pointer of type atomic_t
*
* Atomically increments @v by 1.
* */
static inline void
atomic_inc(atomic_t *v) {
asm volatile("incl %0" : "+m" (v->counter));
}
/* *
* atomic_dec - decrement atomic variable
* @v: pointer of type atomic_t
*
* Atomically decrements @v by 1.
* */
static inline void
atomic_dec(atomic_t *v) {
asm volatile("decl %0" : "+m" (v->counter));
}
/* *
* atomic_inc_test_zero - increment and test
* @v: pointer of type atomic_t
*
* Atomically increments @v by 1 and
* returns true if the result is zero, or false for all other cases.
* */
static inline bool
atomic_inc_test_zero(atomic_t *v) {
unsigned char c;
asm volatile("incl %0; sete %1" : "+m" (v->counter), "=qm" (c) :: "memory");
return c != 0;
}
/* *
* atomic_dec_test_zero - decrement and test
* @v: pointer of type atomic_t
*
* Atomically decrements @v by 1 and
* returns true if the result is 0, or false for all other cases.
* */
static inline bool
atomic_dec_test_zero(atomic_t *v) {
unsigned char c;
asm volatile("decl %0; sete %1" : "+m" (v->counter), "=qm" (c) :: "memory");
return c != 0;
}
/* *
* atomic_add_return - add integer and return
* @i: integer value to add
* @v: pointer of type atomic_t
*
* Atomically adds @i to @v and returns @i + @v
* Requires Modern 486+ processor
* */
static inline int
atomic_add_return(atomic_t *v, int i) {
int __i = i;
asm volatile("xaddl %0, %1" : "+r" (i), "+m" (v->counter) :: "memory");
return i + __i;
}
/* *
* atomic_sub_return - subtract integer and return
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v and returns @v - @i
* */
static inline int
atomic_sub_return(atomic_t *v, int i) {
return atomic_add_return(v, -i);
}
static inline void set_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void set_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline void clear_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void clear_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline void change_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void change_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_set_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_clear_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_change_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline bool test_bit(int nr, volatile void *addr) __attribute__((always_inline));
/* * /* *
@ -199,42 +41,6 @@ change_bit(int nr, volatile void *addr) {
asm volatile ("btcl %1, %0" :"=m" (*(volatile long *)addr) : "Ir" (nr)); asm volatile ("btcl %1, %0" :"=m" (*(volatile long *)addr) : "Ir" (nr));
} }
/* *
* test_and_set_bit - Atomically set a bit and return its old value
* @nr: the bit to set
* @addr: the address to count from
* */
static inline bool
test_and_set_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btsl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
return oldbit != 0;
}
/* *
* test_and_clear_bit - Atomically clear a bit and return its old value
* @nr: the bit to clear
* @addr: the address to count from
* */
static inline bool
test_and_clear_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btrl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
return oldbit != 0;
}
/* *
* test_and_change_bit - Atomically change a bit and return its old value
* @nr: the bit to change
* @addr: the address to count from
* */
static inline bool
test_and_change_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btcl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
return oldbit != 0;
}
/* * /* *
* test_bit - Determine whether a bit is set * test_bit - Determine whether a bit is set
* @nr: the bit to test * @nr: the bit to test

2
code/lab7/kern/mm/memlayout.h
View File

@ -127,7 +127,7 @@ struct e820map {
* that convert Page to other data types, such as phyical address. * that convert Page to other data types, such as phyical address.
* */ * */
struct Page { struct Page {
atomic_t ref; // page frame's reference counter int ref; // page frame's reference counter
uint32_t flags; // array of flags that describe the status of the page frame uint32_t flags; // array of flags that describe the status of the page frame
unsigned int property; // used in buddy system, stores the order (the X in 2^X) of the continuous memory block unsigned int property; // used in buddy system, stores the order (the X in 2^X) of the continuous memory block
int zone_num; // used in buddy system, the No. of zone which the page belongs to int zone_num; // used in buddy system, the No. of zone which the page belongs to

10
code/lab7/kern/mm/pmm.h
View File

@ -121,22 +121,24 @@ pde2page(pde_t pde) {
static inline int static inline int
page_ref(struct Page *page) { page_ref(struct Page *page) {
return atomic_read(&(page->ref)); return page->ref;
} }
static inline void static inline void
set_page_ref(struct Page *page, int val) { set_page_ref(struct Page *page, int val) {
atomic_set(&(page->ref), val); page->ref = val;
} }
static inline int static inline int
page_ref_inc(struct Page *page) { page_ref_inc(struct Page *page) {
return atomic_add_return(&(page->ref), 1); page->ref += 1;
return page->ref;
} }
static inline int static inline int
page_ref_dec(struct Page *page) { page_ref_dec(struct Page *page) {
return atomic_sub_return(&(page->ref), 1); page->ref -= 1;
return page->ref;
} }
extern char bootstack[], bootstacktop[]; extern char bootstack[], bootstacktop[];

12
code/lab7/kern/mm/vmm.h
View File

@ -35,7 +35,7 @@ struct mm_struct {
pde_t *pgdir; // the PDT of these vma pde_t *pgdir; // the PDT of these vma
int map_count; // the count of these vma int map_count; // the count of these vma
void *sm_priv; // the private data for swap manager void *sm_priv; // the private data for swap manager
atomic_t mm_count; // the number ofprocess which shared the mm int mm_count; // the number ofprocess which shared the mm
semaphore_t mm_sem; // mutex for using dup_mmap fun to duplicat the mm semaphore_t mm_sem; // mutex for using dup_mmap fun to duplicat the mm
int locked_by; // the lock owner process's pid int locked_by; // the lock owner process's pid
@ -68,22 +68,24 @@ bool copy_to_user(struct mm_struct *mm, void *dst, const void *src, size_t len);
static inline int static inline int
mm_count(struct mm_struct *mm) { mm_count(struct mm_struct *mm) {
return atomic_read(&(mm->mm_count)); return mm->mm_count;
} }
static inline void static inline void
set_mm_count(struct mm_struct *mm, int val) { set_mm_count(struct mm_struct *mm, int val) {
atomic_set(&(mm->mm_count), val); mm->mm_count = val;
} }
static inline int static inline int
mm_count_inc(struct mm_struct *mm) { mm_count_inc(struct mm_struct *mm) {
return atomic_add_return(&(mm->mm_count), 1); mm->mm_count += 1;
return mm->mm_count;
} }
static inline int static inline int
mm_count_dec(struct mm_struct *mm) { mm_count_dec(struct mm_struct *mm) {
return atomic_sub_return(&(mm->mm_count), 1); mm->mm_count -= 1;
return mm->mm_count;
} }
static inline void static inline void

194
code/lab7/libs/atomic.h
View File

@ -3,167 +3,9 @@
/* Atomic operations that C can't guarantee us. Useful for resource counting etc.. */ /* Atomic operations that C can't guarantee us. Useful for resource counting etc.. */
typedef struct {
volatile int counter;
} atomic_t;
static inline int atomic_read(const atomic_t *v) __attribute__((always_inline));
static inline void atomic_set(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_add(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_sub(atomic_t *v, int i) __attribute__((always_inline));
static inline bool atomic_sub_test_zero(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_inc(atomic_t *v) __attribute__((always_inline));
static inline void atomic_dec(atomic_t *v) __attribute__((always_inline));
static inline bool atomic_inc_test_zero(atomic_t *v) __attribute__((always_inline));
static inline bool atomic_dec_test_zero(atomic_t *v) __attribute__((always_inline));
static inline int atomic_add_return(atomic_t *v, int i) __attribute__((always_inline));
static inline int atomic_sub_return(atomic_t *v, int i) __attribute__((always_inline));
/* *
* atomic_read - read atomic variable
* @v: pointer of type atomic_t
*
* Atomically reads the value of @v.
* */
static inline int
atomic_read(const atomic_t *v) {
return v->counter;
}
/* *
* atomic_set - set atomic variable
* @v: pointer of type atomic_t
* @i: required value
*
* Atomically sets the value of @v to @i.
* */
static inline void
atomic_set(atomic_t *v, int i) {
v->counter = i;
}
/* *
* atomic_add - add integer to atomic variable
* @v: pointer of type atomic_t
* @i: integer value to add
*
* Atomically adds @i to @v.
* */
static inline void
atomic_add(atomic_t *v, int i) {
asm volatile ("addl %1, %0" : "+m" (v->counter) : "ir" (i));
}
/* *
* atomic_sub - subtract integer from atomic variable
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v.
* */
static inline void
atomic_sub(atomic_t *v, int i) {
asm volatile("subl %1, %0" : "+m" (v->counter) : "ir" (i));
}
/* *
* atomic_sub_test_zero - subtract value from variable and test result
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v and
* returns true if the result is zero, or false for all other cases.
* */
static inline bool
atomic_sub_test_zero(atomic_t *v, int i) {
unsigned char c;
asm volatile("subl %2, %0; sete %1" : "+m" (v->counter), "=qm" (c) : "ir" (i) : "memory");
return c != 0;
}
/* *
* atomic_inc - increment atomic variable
* @v: pointer of type atomic_t
*
* Atomically increments @v by 1.
* */
static inline void
atomic_inc(atomic_t *v) {
asm volatile("incl %0" : "+m" (v->counter));
}
/* *
* atomic_dec - decrement atomic variable
* @v: pointer of type atomic_t
*
* Atomically decrements @v by 1.
* */
static inline void
atomic_dec(atomic_t *v) {
asm volatile("decl %0" : "+m" (v->counter));
}
/* *
* atomic_inc_test_zero - increment and test
* @v: pointer of type atomic_t
*
* Atomically increments @v by 1 and
* returns true if the result is zero, or false for all other cases.
* */
static inline bool
atomic_inc_test_zero(atomic_t *v) {
unsigned char c;
asm volatile("incl %0; sete %1" : "+m" (v->counter), "=qm" (c) :: "memory");
return c != 0;
}
/* *
* atomic_dec_test_zero - decrement and test
* @v: pointer of type atomic_t
*
* Atomically decrements @v by 1 and
* returns true if the result is 0, or false for all other cases.
* */
static inline bool
atomic_dec_test_zero(atomic_t *v) {
unsigned char c;
asm volatile("decl %0; sete %1" : "+m" (v->counter), "=qm" (c) :: "memory");
return c != 0;
}
/* *
* atomic_add_return - add integer and return
* @i: integer value to add
* @v: pointer of type atomic_t
*
* Atomically adds @i to @v and returns @i + @v
* Requires Modern 486+ processor
* */
static inline int
atomic_add_return(atomic_t *v, int i) {
int __i = i;
asm volatile("xaddl %0, %1" : "+r" (i), "+m" (v->counter) :: "memory");
return i + __i;
}
/* *
* atomic_sub_return - subtract integer and return
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v and returns @v - @i
* */
static inline int
atomic_sub_return(atomic_t *v, int i) {
return atomic_add_return(v, -i);
}
static inline void set_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void set_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline void clear_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void clear_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline void change_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void change_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_set_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_clear_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_change_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline bool test_bit(int nr, volatile void *addr) __attribute__((always_inline));
/* * /* *
@ -199,42 +41,6 @@ change_bit(int nr, volatile void *addr) {
asm volatile ("btcl %1, %0" :"=m" (*(volatile long *)addr) : "Ir" (nr)); asm volatile ("btcl %1, %0" :"=m" (*(volatile long *)addr) : "Ir" (nr));
} }
/* *
* test_and_set_bit - Atomically set a bit and return its old value
* @nr: the bit to set
* @addr: the address to count from
* */
static inline bool
test_and_set_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btsl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
return oldbit != 0;
}
/* *
* test_and_clear_bit - Atomically clear a bit and return its old value
* @nr: the bit to clear
* @addr: the address to count from
* */
static inline bool
test_and_clear_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btrl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
return oldbit != 0;
}
/* *
* test_and_change_bit - Atomically change a bit and return its old value
* @nr: the bit to change
* @addr: the address to count from
* */
static inline bool
test_and_change_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btcl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
return oldbit != 0;
}
/* * /* *
* test_bit - Determine whether a bit is set * test_bit - Determine whether a bit is set
* @nr: the bit to test * @nr: the bit to test

2
code/lab8/kern/fs/file.c
View File

@ -27,7 +27,7 @@ fd_array_init(struct file *fd_array) {
int fd; int fd;
struct file *file = fd_array; struct file *file = fd_array;
for (fd = 0; fd < FILES_STRUCT_NENTRY; fd ++, file ++) { for (fd = 0; fd < FILES_STRUCT_NENTRY; fd ++, file ++) {
atomic_set(&(file->open_count), 0); file->open_count = 0;
file->status = FD_NONE, file->fd = fd; file->status = FD_NONE, file->fd = fd;
} }
} }

10
code/lab8/kern/fs/file.h
View File

@ -20,7 +20,7 @@ struct file {
int fd; int fd;
off_t pos; off_t pos;
struct inode *node; struct inode *node;
atomic_t open_count; int open_count;
}; };
void fd_array_init(struct file *fd_array); void fd_array_init(struct file *fd_array);
@ -43,17 +43,19 @@ int file_mkfifo(const char *name, uint32_t open_flags);
static inline int static inline int
fopen_count(struct file *file) { fopen_count(struct file *file) {
return atomic_read(&(file->open_count)); return file->open_count;
} }
static inline int static inline int
fopen_count_inc(struct file *file) { fopen_count_inc(struct file *file) {
return atomic_add_return(&(file->open_count), 1); file->open_count += 1;
return file->open_count;
} }
static inline int static inline int
fopen_count_dec(struct file *file) { fopen_count_dec(struct file *file) {
return atomic_sub_return(&(file->open_count), 1); file->open_count -= 1;
return file->open_count;
} }
#endif /* !__KERN_FS_FILE_H__ */ #endif /* !__KERN_FS_FILE_H__ */

2
code/lab8/kern/fs/fs.c
View File

@ -38,7 +38,7 @@ files_create(void) {
if ((filesp = kmalloc(sizeof(struct files_struct) + FILES_STRUCT_BUFSIZE)) != NULL) { if ((filesp = kmalloc(sizeof(struct files_struct) + FILES_STRUCT_BUFSIZE)) != NULL) {
filesp->pwd = NULL; filesp->pwd = NULL;
filesp->fd_array = (void *)(filesp + 1); filesp->fd_array = (void *)(filesp + 1);
atomic_set(&(filesp->files_count), 0); filesp->files_count = 0;
sem_init(&(filesp->files_sem), 1); sem_init(&(filesp->files_sem), 1);
fd_array_init(filesp->fd_array); fd_array_init(filesp->fd_array);
} }

10
code/lab8/kern/fs/fs.h
View File

@ -25,7 +25,7 @@ struct file;
struct files_struct { struct files_struct {
struct inode *pwd; // inode of present working directory struct inode *pwd; // inode of present working directory
struct file *fd_array; // opened files array struct file *fd_array; // opened files array
atomic_t files_count; // the number of opened files int files_count; // the number of opened files
semaphore_t files_sem; // lock protect sem semaphore_t files_sem; // lock protect sem
}; };
@ -42,17 +42,19 @@ int dup_files(struct files_struct *to, struct files_struct *from);
static inline int static inline int
files_count(struct files_struct *filesp) { files_count(struct files_struct *filesp) {
return atomic_read(&(filesp->files_count)); return filesp->files_count;
} }
static inline int static inline int
files_count_inc(struct files_struct *filesp) { files_count_inc(struct files_struct *filesp) {
return atomic_add_return(&(filesp->files_count), 1); filesp->files_count += 1;
return filesp->files_count;
} }
static inline int static inline int
files_count_dec(struct files_struct *filesp) { files_count_dec(struct files_struct *filesp) {
return atomic_sub_return(&(filesp->files_count), 1); filesp->files_count -= 1;
return filesp->files_count;
} }
#endif /* !__KERN_FS_FS_H__ */ #endif /* !__KERN_FS_FS_H__ */

18
code/lab8/kern/fs/vfs/inode.c
View File

@ -26,8 +26,8 @@ __alloc_inode(int type) {
* */ * */
void void
inode_init(struct inode *node, const struct inode_ops *ops, struct fs *fs) { inode_init(struct inode *node, const struct inode_ops *ops, struct fs *fs) {
atomic_set(&(node->ref_count), 0); node->ref_count = 0;
atomic_set(&(node->open_count), 0); node->open_count = 0;
node->in_ops = ops, node->in_fs = fs; node->in_ops = ops, node->in_fs = fs;
vop_ref_inc(node); vop_ref_inc(node);
} }
@ -49,7 +49,8 @@ inode_kill(struct inode *node) {
* */ * */
int int
inode_ref_inc(struct inode *node) { inode_ref_inc(struct inode *node) {
return atomic_add_return(&(node->ref_count), 1); node->ref_count += 1;
return node->ref_count;
} }
/* * /* *
@ -61,7 +62,9 @@ int
inode_ref_dec(struct inode *node) { inode_ref_dec(struct inode *node) {
assert(inode_ref_count(node) > 0); assert(inode_ref_count(node) > 0);
int ref_count, ret; int ref_count, ret;
if ((ref_count = atomic_sub_return(&(node->ref_count), 1)) == 0) { node->ref_count-= 1;
ref_count = node->ref_count;
if (ref_count == 0) {
if ((ret = vop_reclaim(node)) != 0 && ret != -E_BUSY) { if ((ret = vop_reclaim(node)) != 0 && ret != -E_BUSY) {
cprintf("vfs: warning: vop_reclaim: %e.\n", ret); cprintf("vfs: warning: vop_reclaim: %e.\n", ret);
} }
@ -75,7 +78,8 @@ inode_ref_dec(struct inode *node) {
* */ * */
int int
inode_open_inc(struct inode *node) { inode_open_inc(struct inode *node) {
return atomic_add_return(&(node->open_count), 1); node->open_count += 1;
return node->open_count;
} }
/* * /* *
@ -87,7 +91,9 @@ int
inode_open_dec(struct inode *node) { inode_open_dec(struct inode *node) {
assert(inode_open_count(node) > 0); assert(inode_open_count(node) > 0);
int open_count, ret; int open_count, ret;
if ((open_count = atomic_sub_return(&(node->open_count), 1)) == 0) { node->open_count -= 1;
open_count = node->open_count;
if (open_count == 0) {
if ((ret = vop_close(node)) != 0) { if ((ret = vop_close(node)) != 0) {
cprintf("vfs: warning: vop_close: %e.\n", ret); cprintf("vfs: warning: vop_close: %e.\n", ret);
} }

8
code/lab8/kern/fs/vfs/inode.h
View File

@ -35,8 +35,8 @@ struct inode {
inode_type_device_info = 0x1234, inode_type_device_info = 0x1234,
inode_type_sfs_inode_info, inode_type_sfs_inode_info,
} in_type; } in_type;
atomic_t ref_count; int ref_count;
atomic_t open_count; int open_count;
struct fs *in_fs; struct fs *in_fs;
const struct inode_ops *in_ops; const struct inode_ops *in_ops;
}; };
@ -236,12 +236,12 @@ void inode_check(struct inode *node, const char *opstr);
static inline int static inline int
inode_ref_count(struct inode *node) { inode_ref_count(struct inode *node) {
return atomic_read(&(node->ref_count)); return node->ref_count;
} }
static inline int static inline int
inode_open_count(struct inode *node) { inode_open_count(struct inode *node) {
return atomic_read(&(node->open_count)); return node->open_count;
} }
#endif /* !__KERN_FS_VFS_INODE_H__ */ #endif /* !__KERN_FS_VFS_INODE_H__ */

2
code/lab8/kern/mm/memlayout.h
View File

@ -127,7 +127,7 @@ struct e820map {
* that convert Page to other data types, such as phyical address. * that convert Page to other data types, such as phyical address.
* */ * */
struct Page { struct Page {
atomic_t ref; // page frame's reference counter int ref; // page frame's reference counter
uint32_t flags; // array of flags that describe the status of the page frame uint32_t flags; // array of flags that describe the status of the page frame
unsigned int property; // used in buddy system, stores the order (the X in 2^X) of the continuous memory block unsigned int property; // used in buddy system, stores the order (the X in 2^X) of the continuous memory block
int zone_num; // used in buddy system, the No. of zone which the page belongs to int zone_num; // used in buddy system, the No. of zone which the page belongs to

10
code/lab8/kern/mm/pmm.h
View File

@ -121,22 +121,24 @@ pde2page(pde_t pde) {
static inline int static inline int
page_ref(struct Page *page) { page_ref(struct Page *page) {
return atomic_read(&(page->ref)); return page->ref;
} }
static inline void static inline void
set_page_ref(struct Page *page, int val) { set_page_ref(struct Page *page, int val) {
atomic_set(&(page->ref), val); page->ref = val;
} }
static inline int static inline int
page_ref_inc(struct Page *page) { page_ref_inc(struct Page *page) {
return atomic_add_return(&(page->ref), 1); page->ref += 1;
return page->ref;
} }
static inline int static inline int
page_ref_dec(struct Page *page) { page_ref_dec(struct Page *page) {
return atomic_sub_return(&(page->ref), 1); page->ref -= 1;
return page->ref;
} }
extern char bootstack[], bootstacktop[]; extern char bootstack[], bootstacktop[];

12
code/lab8/kern/mm/vmm.h
View File

@ -35,7 +35,7 @@ struct mm_struct {
pde_t *pgdir; // the PDT of these vma pde_t *pgdir; // the PDT of these vma
int map_count; // the count of these vma int map_count; // the count of these vma
void *sm_priv; // the private data for swap manager void *sm_priv; // the private data for swap manager
atomic_t mm_count; // the number ofprocess which shared the mm int mm_count; // the number ofprocess which shared the mm
semaphore_t mm_sem; // mutex for using dup_mmap fun to duplicat the mm semaphore_t mm_sem; // mutex for using dup_mmap fun to duplicat the mm
int locked_by; // the lock owner process's pid int locked_by; // the lock owner process's pid
@ -69,22 +69,24 @@ bool copy_string(struct mm_struct *mm, char *dst, const char *src, size_t maxn);
static inline int static inline int
mm_count(struct mm_struct *mm) { mm_count(struct mm_struct *mm) {
return atomic_read(&(mm->mm_count)); return mm->mm_count;
} }
static inline void static inline void
set_mm_count(struct mm_struct *mm, int val) { set_mm_count(struct mm_struct *mm, int val) {
atomic_set(&(mm->mm_count), val); mm->mm_count = val;
} }
static inline int static inline int
mm_count_inc(struct mm_struct *mm) { mm_count_inc(struct mm_struct *mm) {
return atomic_add_return(&(mm->mm_count), 1); mm->mm_count += 1;
return mm->mm_count;
} }
static inline int static inline int
mm_count_dec(struct mm_struct *mm) { mm_count_dec(struct mm_struct *mm) {
return atomic_sub_return(&(mm->mm_count), 1); mm->mm_count -= 1;
return mm->mm_count;
} }
static inline void static inline void

195
code/lab8/libs/atomic.h
View File

@ -3,167 +3,9 @@
/* Atomic operations that C can't guarantee us. Useful for resource counting etc.. */ /* Atomic operations that C can't guarantee us. Useful for resource counting etc.. */
typedef struct {
volatile int counter;
} atomic_t;
static inline int atomic_read(const atomic_t *v) __attribute__((always_inline));
static inline void atomic_set(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_add(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_sub(atomic_t *v, int i) __attribute__((always_inline));
static inline bool atomic_sub_test_zero(atomic_t *v, int i) __attribute__((always_inline));
static inline void atomic_inc(atomic_t *v) __attribute__((always_inline));
static inline void atomic_dec(atomic_t *v) __attribute__((always_inline));
static inline bool atomic_inc_test_zero(atomic_t *v) __attribute__((always_inline));
static inline bool atomic_dec_test_zero(atomic_t *v) __attribute__((always_inline));
static inline int atomic_add_return(atomic_t *v, int i) __attribute__((always_inline));
static inline int atomic_sub_return(atomic_t *v, int i) __attribute__((always_inline));
/* *
* atomic_read - read atomic variable
* @v: pointer of type atomic_t
*
* Atomically reads the value of @v.
* */
static inline int
atomic_read(const atomic_t *v) {
return v->counter;
}
/* *
* atomic_set - set atomic variable
* @v: pointer of type atomic_t
* @i: required value
*
* Atomically sets the value of @v to @i.
* */
static inline void
atomic_set(atomic_t *v, int i) {
v->counter = i;
}
/* *
* atomic_add - add integer to atomic variable
* @v: pointer of type atomic_t
* @i: integer value to add
*
* Atomically adds @i to @v.
* */
static inline void
atomic_add(atomic_t *v, int i) {
asm volatile ("addl %1, %0" : "+m" (v->counter) : "ir" (i));
}
/* *
* atomic_sub - subtract integer from atomic variable
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v.
* */
static inline void
atomic_sub(atomic_t *v, int i) {
asm volatile("subl %1, %0" : "+m" (v->counter) : "ir" (i));
}
/* *
* atomic_sub_test_zero - subtract value from variable and test result
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v and
* returns true if the result is zero, or false for all other cases.
* */
static inline bool
atomic_sub_test_zero(atomic_t *v, int i) {
unsigned char c;
asm volatile("subl %2, %0; sete %1" : "+m" (v->counter), "=qm" (c) : "ir" (i) : "memory");
return c != 0;
}
/* *
* atomic_inc - increment atomic variable
* @v: pointer of type atomic_t
*
* Atomically increments @v by 1.
* */
static inline void
atomic_inc(atomic_t *v) {
asm volatile("incl %0" : "+m" (v->counter));
}
/* *
* atomic_dec - decrement atomic variable
* @v: pointer of type atomic_t
*
* Atomically decrements @v by 1.
* */
static inline void
atomic_dec(atomic_t *v) {
asm volatile("decl %0" : "+m" (v->counter));
}
/* *
* atomic_inc_test_zero - increment and test
* @v: pointer of type atomic_t
*
* Atomically increments @v by 1 and
* returns true if the result is zero, or false for all other cases.
* */
static inline bool
atomic_inc_test_zero(atomic_t *v) {
unsigned char c;
asm volatile("incl %0; sete %1" : "+m" (v->counter), "=qm" (c) :: "memory");
return c != 0;
}
/* *
* atomic_dec_test_zero - decrement and test
* @v: pointer of type atomic_t
*
* Atomically decrements @v by 1 and
* returns true if the result is 0, or false for all other cases.
* */
static inline bool
atomic_dec_test_zero(atomic_t *v) {
unsigned char c;
asm volatile("decl %0; sete %1" : "+m" (v->counter), "=qm" (c) :: "memory");
return c != 0;
}
/* *
* atomic_add_return - add integer and return
* @i: integer value to add
* @v: pointer of type atomic_t
*
* Atomically adds @i to @v and returns @i + @v
* Requires Modern 486+ processor
* */
static inline int
atomic_add_return(atomic_t *v, int i) {
int __i = i;
asm volatile("xaddl %0, %1" : "+r" (i), "+m" (v->counter) :: "memory");
return i + __i;
}
/* *
* atomic_sub_return - subtract integer and return
* @v: pointer of type atomic_t
* @i: integer value to subtract
*
* Atomically subtracts @i from @v and returns @v - @i
* */
static inline int
atomic_sub_return(atomic_t *v, int i) {
return atomic_add_return(v, -i);
}
static inline void set_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void set_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline void clear_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void clear_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline void change_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline void change_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_set_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_clear_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_and_change_bit(int nr, volatile void *addr) __attribute__((always_inline));
static inline bool test_bit(int nr, volatile void *addr) __attribute__((always_inline)); static inline bool test_bit(int nr, volatile void *addr) __attribute__((always_inline));
/* * /* *
@ -199,6 +41,18 @@ change_bit(int nr, volatile void *addr) {
asm volatile ("btcl %1, %0" :"=m" (*(volatile long *)addr) : "Ir" (nr)); asm volatile ("btcl %1, %0" :"=m" (*(volatile long *)addr) : "Ir" (nr));
} }
/* *
* test_bit - Determine whether a bit is set
* @nr: the bit to test
* @addr: the address to count from
* */
static inline bool
test_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btl %2, %1; sbbl %0,%0" : "=r" (oldbit) : "m" (*(volatile long *)addr), "Ir" (nr));
return oldbit != 0;
}
/* * /* *
* test_and_set_bit - Atomically set a bit and return its old value * test_and_set_bit - Atomically set a bit and return its old value
* @nr: the bit to set * @nr: the bit to set
@ -222,30 +76,5 @@ test_and_clear_bit(int nr, volatile void *addr) {
asm volatile ("btrl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory"); asm volatile ("btrl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
return oldbit != 0; return oldbit != 0;
} }
/* *
* test_and_change_bit - Atomically change a bit and return its old value
* @nr: the bit to change
* @addr: the address to count from
* */
static inline bool
test_and_change_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btcl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
return oldbit != 0;
}
/* *
* test_bit - Determine whether a bit is set
* @nr: the bit to test
* @addr: the address to count from
* */
static inline bool
test_bit(int nr, volatile void *addr) {
int oldbit;
asm volatile ("btl %2, %1; sbbl %0,%0" : "=r" (oldbit) : "m" (*(volatile long *)addr), "Ir" (nr));
return oldbit != 0;
}
#endif /* !__LIBS_ATOMIC_H__ */ #endif /* !__LIBS_ATOMIC_H__ */