cheap jordans shoes rough understanding of linux u

Source: http://gliethttp.cublog.cn
Linux to based I / O mapping of the I / O port and memory mapping approach based on I / O port resources, collectively referred to as I / O Region). I / O Region is still an I / O resources, it can still be used to describe the type of resource structure.
Linux is an inverted tree structure to manage each type of I / O resources (such as: I / O ports, peripheral memory, DMA and IRQ) for. each type of I / O resources are the resources corresponding to have an inverted tree, each node in the tree is a resource structure, and tree the root of the root of such resources is described in the resource space.
1. structure
1.1> struct resource iomem_resource = {1.2> struct resource {
const char * name;
unsigned long start, end;
unsigned long flags;
struct resource * parent, * sibling,christian louboutin boutique, * child;
2. Call function
request_mem_region (S1D_PHYSICAL_REG_ADDR, S1D_PHYSICAL_REG_SIZE, Check for safe occupancy after the start physical address S1D_PHYSICAL_REG_ADDR S1D_PHYSICAL_REG_SIZE consecutive bytes of space struct resource * __request_region (struct resource * parent, unsigned long start, unsigned long n, const char * name) struct resource * res = kmalloc (sizeof ( * res), GFP_KERNEL); if (res) {memset (res, 0, sizeof (* res)); res-> name = name; res-> start = start; res-> end = start + n - 1; res-> flags = IORESOURCE_BUSY; write_lock (& ​​resource_lock); for (;;) {struct resource * conflict; conflict = __request_resource (parent, res); / / sibling parent under all unit test for partial the existence of overlapping conflicts if (! conflict) / / conflict = 0; application is successful, the normal placement of the [start, end] to the corresponding position break; if (conflict! = parent) {parent = conflict; if (! (conflict- > flags & IORESOURCE_BUSY)) continue; kfree (res); / / resource overlap conflict is detected, kfree application for the return kmalloc memory res = NULL; break; write_unlock (& ​​resource_lock); return res; static struct resource * __request_resource (struct resource * root, struct resource * new) unsigned long start = new-> start; unsigned long end = new-> end; struct resource * tmp, ** p; if (end start) return root; if (end> root-> end) return root; p = & root-> child; / / root element under the first list * p . [child list is based on I / O resources, physical address from low to high in the order of] for (;;) {tmp = * p; if (! tmp | | tmp-> start> end) {new- > sibling = tmp; * p = new; / / from root-> child = null begin our analysis, then tmp = null, then the first applications will be! tmp conditions are met, and enter / / this time root-> child the value of new indicators,Man, who after being struck by lightning pictograph similar pattern (Figure ), new-> sibling = tmp = null; When the second application occurs: If the tmp-> start> end set up, / / ​​then, root-> child's new pointer value, new-> sibling = tmp; This link, and spatial distribution,infrared air force 1, such as: / / child = [start, end ]-->[ tmp-> start, tmp-> end] (1); If the conditions tmp-> start> end does not hold, then only! tmp conditions of access / / Well,jordans shoes, root-> child the value of the constant, tmp-> sibling = new; new-> sibling = tmp = null This link, and spatial distribution, such as: / / child = [child-> start,air max 91 6 -year-old Hmong girl suffering from strange dis, child-> end ]-->[ start, end] (2); / / When the first time of three applications: If you start in (2) of the [child-> end, end], between then tmp-> end start slibing = null, / / ​​because the tmp-> end> ​​start, so the resource conflict, return ( 2) the [start, end] domain / / sum of the two boundary conditions and a median value of the analysis, we can see a code to address to high address from the order of list / / model diagram: childe = [a, b ]-->[ c, d ]-->[ e, f], then there is a [x,cheap jordans shoes, y] to be inserted into, tmp as a sibling pointer swimming / / tmp point to the child = [ ,buy cheap supra shoes,],[> [c, d ]-->[ e, f] -> null; when tmp-> end> ​​= x, the conflict to return tmp / / tmp point to [c, d], if tmp-> ; start> y, insert the link after the photo: child = [a, b ]-->[ x, y ]-->[ c, d ]-->[ e, f] -> ; null; when tmp-> end> ​​= x, the conflict to return tmp / / tmp point to [e, f], if tmp-> start> y, insert the link after the photo: child = [a, b ]-->[ c, d ]-->[ x, y ]-->[ e, f] -> null; when tmp-> end> ​​= x, the conflict to return tmp / / tmp point to null, insert the link after the photo: child = [a, b ]-->[ c, d ]-->[ e, f ]-->[ x, y] -> null ; / / smooth to the detection of conflict, the purpose of the order link new-> parent = root; return NULL; p = & tmp-> sibling; if (tmp-> end <start) continue; return tmp ; article from CSDN blog, reproduced, please credit: http://
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Little River Snow accompanied by her mother in the ward reporter Yujing She

, if not mother was ill, and 7-year-old Zhou Jiangxue should first grade. And now, she had to leave the school day, the shuttle in the hospital, and nurses to deal with. She learned to read needle, pour urine, every day my mother brought water, fed, helped her mother out of bed. Around the nurse said: / p>
Little River Snow December 20 last year with my mother came from a dry county Xianyang medical treatment. Mom is a dry County Yang Li Ying local people, the year before last May found cervical cancer, because of family difficulties and gave up after a short treatment. Recently, when Li Ying once again came to Xianyang Department of Oncology, Affiliated Hospital of Traditional Chinese Medicine Treatment of late stage cancer when the. Doctors said the surgery had no meaning. Li Ying is a single mother, small River Snow is her only daughter, she said: hospital wards met Li Ying mother and daughter. Li Ying was lying in bed, not to speak, tears streaming down first, No pain, is the daughter of needle me every day, side water. middle of the night I move, she got up and asked: mother of urine yet? Then she put the catheter urine poured into the bottle, and then vacated the bottle. her the I take care of her age, it was the time, but now ... ... Children's eating and drinking are the nurse, she also according to look down, just like a child at night to sleep on her bed crowded. . time out to see a doctor, Li Ying had to give her daughter to do the out of school. September last year, just on a year out of school with only a small Jiangxue mother in the hospital. Li Ying said, however, must let their children go to school next semester, has been obediently leaned bed, holding a cartoon clips play to play, she said it was bought for her hospital nurses. Asked her if she would like to go home? She said: rim of the eye was red, but has no tears.
for the school, Jiang Xue very long for small, she said, missed the students, teachers, See the press to take pictures, she was interested to come together and carefully touch the lens with your fingers. Only this time, she was like a 7-year-old child.
■ doctors: her mother's condition is very bad

the attending physician,长沙团购网, according to Panda Fu Li Ying said, in fact, just two years ago can be found when the surgery of cervical cancer, but it was Li Ying has not got enough money to give up treatment. It is now late, the cancer cells spread to surrounding tissue, surgery does not make sense, can only relieve the patient's symptoms depend on radiation prolong life, process, in the middle can not be interrupted, I need some economic support. She was out here very well. Chen praised the small River Snow nurse sincerely: The child knows everything. Reporter Jing Yu