Merge branch 'master' of github.com:chyyuu/ucore_lab
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chyyuu
commit
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.gitignore
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*~
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obj/
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bin/
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24
README
24
README
@ -20,6 +20,30 @@ lab6: scheduling
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lab7: mutex/sync
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lab8: filesystem
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If you don't want to install ubuntu and other softs to finish these labs in Windows, you can use VirtualBox soft (https://www.virtualbox.org/) and
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a virtual disk image with all these softs. Below example is shown how to setup lab environment in Windows.
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You can download this virtual disk image -- oslabs_for_student_2012.zip (576.2MB,) from http://pan.baidu.com/share/link?shareid=69868&uk=2585194235, which
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is an VirtualBox disk image (contains ubuntu 12.04 and needed softs, and is zipped with zip and xz format), and can be unzipped
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by haozip software (http://www.haozip.com).
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After unzip oslabs_for_student_2012.zip, you will get
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---
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C:\vms\ubuntu-12.04.vbox.xz
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C:\vms\ubuntu-12.04.vmdk.vmdk.xz
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C:\vms\ubuntu-12.04.vmdk-flat.vmdk.xz
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---
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then you will continue unzip all these files, and get
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---
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C:\vms\ubuntu-12.04.vbox
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C:\vms\ubuntu-12.04.vmdk.vmdk
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C:\vms\ubuntu-12.04.vmdk-flat.vmdk
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---
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If you installed VirtualBox soft, then the last step is: double clik file "ubuntu-12.04.vbox" and run ubuntu 12.04 in VirtualBox.
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In ubuntu 12.04 login Interface:
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username: chy
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password: <SPACE KEY>
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After you login, you will see the directory ucore_lab in HOME directory.
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EXERCISE STEPS
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--------------
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1 $cd labX
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@ -104,8 +104,8 @@ struct Page {
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};
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/* Flags describing the status of a page frame */
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#define PG_reserved 0 // the page descriptor is reserved for kernel or unusable
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#define PG_property 1 // the member 'property' is valid
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#define PG_reserved 0 // if this bit=1: the Page is reserved for kernel, cannot be used in alloc/free_pages; otherwise, this bit=0
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#define PG_property 1 // if this bit=1: the Page is the head page of a free memory block(contains some continuous_addrress pages), and can be used in alloc_pages; if this bit=0: if the Page is the the head page of a free memory block, then this Page and the memory block is alloced. Or this Page isn't the head page.
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#define SetPageReserved(page) set_bit(PG_reserved, &((page)->flags))
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#define ClearPageReserved(page) clear_bit(PG_reserved, &((page)->flags))
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@ -107,8 +107,8 @@ struct Page {
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};
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/* Flags describing the status of a page frame */
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#define PG_reserved 0 // the page descriptor is reserved for kernel or unusable
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#define PG_property 1 // the member 'property' is valid
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#define PG_reserved 0 // if this bit=1: the Page is reserved for kernel, cannot be used in alloc/free_pages; otherwise, this bit=0
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#define PG_property 1 // if this bit=1: the Page is the head page of a free memory block(contains some continuous_addrress pages), and can be used in alloc_pages; if this bit=0: if the Page is the the head page of a free memory block, then this Page and the memory block is alloced. Or this Page isn't the head page.
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#define SetPageReserved(page) set_bit(PG_reserved, &((page)->flags))
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#define ClearPageReserved(page) clear_bit(PG_reserved, &((page)->flags))
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@ -100,16 +100,15 @@ struct e820map {
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struct Page {
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int ref; // page frame's reference counter
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uint32_t flags; // array of flags that describe the status of the page frame
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unsigned int property; // used in buddy system, stores the order (the X in 2^X) of the continuous memory block
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int zone_num; // used in buddy system, the No. of zone which the page belongs to
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unsigned int property; // the num of free block, used in first fit pm manager
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list_entry_t page_link; // free list link
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list_entry_t pra_page_link; // used for pra (page replace algorithm)
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uintptr_t pra_vaddr; // used for pra (page replace algorithm)
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};
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/* Flags describing the status of a page frame */
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#define PG_reserved 0 // the page descriptor is reserved for kernel or unusable
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#define PG_property 1 // the member 'property' is valid
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#define PG_reserved 0 // if this bit=1: the Page is reserved for kernel, cannot be used in alloc/free_pages; otherwise, this bit=0
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#define PG_property 1 // if this bit=1: the Page is the head page of a free memory block(contains some continuous_addrress pages), and can be used in alloc_pages; if this bit=0: if the Page is the the head page of a free memory block, then this Page and the memory block is alloced. Or this Page isn't the head page.
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#define SetPageReserved(page) set_bit(PG_reserved, &((page)->flags))
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#define ClearPageReserved(page) clear_bit(PG_reserved, &((page)->flags))
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@ -129,16 +129,15 @@ struct e820map {
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struct Page {
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int ref; // page frame's reference counter
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uint32_t flags; // array of flags that describe the status of the page frame
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unsigned int property; // used in buddy system, stores the order (the X in 2^X) of the continuous memory block
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int zone_num; // used in buddy system, the No. of zone which the page belongs to
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unsigned int property; // the num of free block, used in first fit pm manager
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list_entry_t page_link; // free list link
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list_entry_t pra_page_link; // used for pra (page replace algorithm)
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uintptr_t pra_vaddr; // used for pra (page replace algorithm)
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};
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/* Flags describing the status of a page frame */
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#define PG_reserved 0 // the page descriptor is reserved for kernel or unusable
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#define PG_property 1 // the member 'property' is valid
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#define PG_reserved 0 // if this bit=1: the Page is reserved for kernel, cannot be used in alloc/free_pages; otherwise, this bit=0
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#define PG_property 1 // if this bit=1: the Page is the head page of a free memory block(contains some continuous_addrress pages), and can be used in alloc_pages; if this bit=0: if the Page is the the head page of a free memory block, then this Page and the memory block is alloced. Or this Page isn't the head page.
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#define SetPageReserved(page) set_bit(PG_reserved, &((page)->flags))
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#define ClearPageReserved(page) clear_bit(PG_reserved, &((page)->flags))
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@ -53,5 +53,29 @@ test_bit(int nr, volatile void *addr) {
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return oldbit != 0;
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}
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/* *
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* test_and_set_bit - Atomically set a bit and return its old value
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* @nr: the bit to set
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* @addr: the address to count from
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* */
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static inline bool
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test_and_set_bit(int nr, volatile void *addr) {
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int oldbit;
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asm volatile ("btsl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
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return oldbit != 0;
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}
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/* *
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* test_and_clear_bit - Atomically clear a bit and return its old value
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* @nr: the bit to clear
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* @addr: the address to count from
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* */
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static inline bool
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test_and_clear_bit(int nr, volatile void *addr) {
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int oldbit;
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asm volatile ("btrl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
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return oldbit != 0;
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}
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#endif /* !__LIBS_ATOMIC_H__ */
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@ -129,16 +129,15 @@ struct e820map {
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struct Page {
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int ref; // page frame's reference counter
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uint32_t flags; // array of flags that describe the status of the page frame
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unsigned int property; // used in buddy system, stores the order (the X in 2^X) of the continuous memory block
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int zone_num; // used in buddy system, the No. of zone which the page belongs to
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unsigned int property; // the num of free block, used in first fit pm manager
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list_entry_t page_link; // free list link
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list_entry_t pra_page_link; // used for pra (page replace algorithm)
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uintptr_t pra_vaddr; // used for pra (page replace algorithm)
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};
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/* Flags describing the status of a page frame */
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#define PG_reserved 0 // the page descriptor is reserved for kernel or unusable
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#define PG_property 1 // the member 'property' is valid
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#define PG_reserved 0 // if this bit=1: the Page is reserved for kernel, cannot be used in alloc/free_pages; otherwise, this bit=0
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#define PG_property 1 // if this bit=1: the Page is the head page of a free memory block(contains some continuous_addrress pages), and can be used in alloc_pages; if this bit=0: if the Page is the the head page of a free memory block, then this Page and the memory block is alloced. Or this Page isn't the head page.
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#define SetPageReserved(page) set_bit(PG_reserved, &((page)->flags))
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#define ClearPageReserved(page) clear_bit(PG_reserved, &((page)->flags))
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@ -53,5 +53,29 @@ test_bit(int nr, volatile void *addr) {
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return oldbit != 0;
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}
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/* *
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* test_and_set_bit - Atomically set a bit and return its old value
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* @nr: the bit to set
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* @addr: the address to count from
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* */
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static inline bool
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test_and_set_bit(int nr, volatile void *addr) {
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int oldbit;
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asm volatile ("btsl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
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return oldbit != 0;
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}
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/* *
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* test_and_clear_bit - Atomically clear a bit and return its old value
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* @nr: the bit to clear
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* @addr: the address to count from
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* */
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static inline bool
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test_and_clear_bit(int nr, volatile void *addr) {
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int oldbit;
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asm volatile ("btrl %2, %1; sbbl %0, %0" : "=r" (oldbit), "=m" (*(volatile long *)addr) : "Ir" (nr) : "memory");
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return oldbit != 0;
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}
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#endif /* !__LIBS_ATOMIC_H__ */
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@ -129,16 +129,15 @@ struct e820map {
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struct Page {
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int ref; // page frame's reference counter
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uint32_t flags; // array of flags that describe the status of the page frame
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unsigned int property; // used in buddy system, stores the order (the X in 2^X) of the continuous memory block
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int zone_num; // used in buddy system, the No. of zone which the page belongs to
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unsigned int property; // the num of free block, used in first fit pm manager
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list_entry_t page_link; // free list link
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list_entry_t pra_page_link; // used for pra (page replace algorithm)
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uintptr_t pra_vaddr; // used for pra (page replace algorithm)
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};
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/* Flags describing the status of a page frame */
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#define PG_reserved 0 // the page descriptor is reserved for kernel or unusable
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#define PG_property 1 // the member 'property' is valid
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#define PG_reserved 0 // if this bit=1: the Page is reserved for kernel, cannot be used in alloc/free_pages; otherwise, this bit=0
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#define PG_property 1 // if this bit=1: the Page is the head page of a free memory block(contains some continuous_addrress pages), and can be used in alloc_pages; if this bit=0: if the Page is the the head page of a free memory block, then this Page and the memory block is alloced. Or this Page isn't the head page.
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#define SetPageReserved(page) set_bit(PG_reserved, &((page)->flags))
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#define ClearPageReserved(page) clear_bit(PG_reserved, &((page)->flags))
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@ -129,16 +129,15 @@ struct e820map {
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struct Page {
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int ref; // page frame's reference counter
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uint32_t flags; // array of flags that describe the status of the page frame
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unsigned int property; // used in buddy system, stores the order (the X in 2^X) of the continuous memory block
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int zone_num; // used in buddy system, the No. of zone which the page belongs to
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unsigned int property; // the num of free block, used in first fit pm manager
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list_entry_t page_link; // free list link
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list_entry_t pra_page_link; // used for pra (page replace algorithm)
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uintptr_t pra_vaddr; // used for pra (page replace algorithm)
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};
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/* Flags describing the status of a page frame */
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#define PG_reserved 0 // the page descriptor is reserved for kernel or unusable
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#define PG_property 1 // the member 'property' is valid
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#define PG_reserved 0 // if this bit=1: the Page is reserved for kernel, cannot be used in alloc/free_pages; otherwise, this bit=0
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#define PG_property 1 // if this bit=1: the Page is the head page of a free memory block(contains some continuous_addrress pages), and can be used in alloc_pages; if this bit=0: if the Page is the the head page of a free memory block, then this Page and the memory block is alloced. Or this Page isn't the head page.
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#define SetPageReserved(page) set_bit(PG_reserved, &((page)->flags))
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#define ClearPageReserved(page) clear_bit(PG_reserved, &((page)->flags))
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