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Regard whitespace Rev 2129 → Rev 2132

/trunk/kernel/generic/src/mm/backend_anon.c
72,7 → 72,8
* @param addr Faulting virtual address.
* @param access Access mode that caused the fault (i.e. read/write/exec).
*
* @return AS_PF_FAULT on failure (i.e. page fault) or AS_PF_OK on success (i.e. serviced).
* @return AS_PF_FAULT on failure (i.e. page fault) or AS_PF_OK on success (i.e.
* serviced).
*/
int anon_page_fault(as_area_t *area, uintptr_t addr, pf_access_t access)
{
86,7 → 87,8
/*
* The area is shared, chances are that the mapping can be found
* in the pagemap of the address space area share info structure.
* in the pagemap of the address space area share info
* structure.
* In the case that the pagemap does not contain the respective
* mapping, a new frame is allocated and the mapping is created.
*/
102,7 → 104,8
* Just a small workaround.
*/
for (i = 0; i < leaf->keys; i++) {
if (leaf->key[i] == ALIGN_DOWN(addr, PAGE_SIZE)) {
if (leaf->key[i] ==
ALIGN_DOWN(addr, PAGE_SIZE)) {
allocate = false;
break;
}
112,9 → 115,12
memsetb(PA2KA(frame), FRAME_SIZE, 0);
/*
* Insert the address of the newly allocated frame to the pagemap.
* Insert the address of the newly allocated
* frame to the pagemap.
*/
btree_insert(&area->sh_info->pagemap, ALIGN_DOWN(addr, PAGE_SIZE) - area->base, (void *) frame, leaf);
btree_insert(&area->sh_info->pagemap,
ALIGN_DOWN(addr, PAGE_SIZE) - area->base,
(void *) frame, leaf);
}
}
frame_reference_add(ADDR2PFN(frame));
141,8 → 147,8
/*
* Map 'page' to 'frame'.
* Note that TLB shootdown is not attempted as only new information is being
* inserted into page tables.
* Note that TLB shootdown is not attempted as only new information is
* being inserted into page tables.
*/
page_mapping_insert(AS, addr, frame, as_area_get_flags(area));
if (!used_space_insert(area, ALIGN_DOWN(addr, PAGE_SIZE), 1))
184,7 → 190,8
* Copy used portions of the area to sh_info's page map.
*/
mutex_lock(&area->sh_info->lock);
for (cur = area->used_space.leaf_head.next; cur != &area->used_space.leaf_head; cur = cur->next) {
for (cur = area->used_space.leaf_head.next;
cur != &area->used_space.leaf_head; cur = cur->next) {
btree_node_t *node;
int i;
198,12 → 205,17
pte_t *pte;
page_table_lock(area->as, false);
pte = page_mapping_find(area->as, base + j*PAGE_SIZE);
ASSERT(pte && PTE_VALID(pte) && PTE_PRESENT(pte));
btree_insert(&area->sh_info->pagemap, (base + j*PAGE_SIZE) - area->base,
pte = page_mapping_find(area->as,
base + j * PAGE_SIZE);
ASSERT(pte && PTE_VALID(pte) &&
PTE_PRESENT(pte));
btree_insert(&area->sh_info->pagemap,
(base + j * PAGE_SIZE) - area->base,
(void *) PTE_GET_FRAME(pte), NULL);
page_table_unlock(area->as, false);
frame_reference_add(ADDR2PFN(PTE_GET_FRAME(pte)));
 
pfn_t pfn = ADDR2PFN(PTE_GET_FRAME(pte));
frame_reference_add(pfn);
}
}
213,3 → 225,4
 
/** @}
*/
 
/trunk/kernel/generic/src/mm/backend_phys.c
32,7 → 32,8
 
/**
* @file
* @brief Backend for address space areas backed by continuous physical memory.
* @brief Backend for address space areas backed by continuous physical
* memory.
*/
 
#include <debug.h>
62,7 → 63,8
* @param addr Faulting virtual address.
* @param access Access mode that caused the fault (i.e. read/write/exec).
*
* @return AS_PF_FAULT on failure (i.e. page fault) or AS_PF_OK on success (i.e. serviced).
* @return AS_PF_FAULT on failure (i.e. page fault) or AS_PF_OK on success (i.e.
* serviced).
*/
int phys_page_fault(as_area_t *area, uintptr_t addr, pf_access_t access)
{
72,7 → 74,8
return AS_PF_FAULT;
 
ASSERT(addr - area->base < area->backend_data.frames * FRAME_SIZE);
page_mapping_insert(AS, addr, base + (addr - area->base), as_area_get_flags(area));
page_mapping_insert(AS, addr, base + (addr - area->base),
as_area_get_flags(area));
if (!used_space_insert(area, ALIGN_DOWN(addr, PAGE_SIZE), 1))
panic("Could not insert used space.\n");
 
/trunk/kernel/generic/src/mm/backend_elf.c
71,7 → 71,8
* @param addr Faulting virtual address.
* @param access Access mode that caused the fault (i.e. read/write/exec).
*
* @return AS_PF_FAULT on failure (i.e. page fault) or AS_PF_OK on success (i.e. serviced).
* @return AS_PF_FAULT on failure (i.e. page fault) or AS_PF_OK on success (i.e.
* serviced).
*/
int elf_page_fault(as_area_t *area, uintptr_t addr, pf_access_t access)
{
84,7 → 85,8
if (!as_area_check_access(area, access))
return AS_PF_FAULT;
 
ASSERT((addr >= entry->p_vaddr) && (addr < entry->p_vaddr + entry->p_memsz));
ASSERT((addr >= entry->p_vaddr) &&
(addr < entry->p_vaddr + entry->p_memsz));
i = (addr - entry->p_vaddr) >> PAGE_WIDTH;
base = (uintptr_t) (((void *) elf) + entry->p_offset);
ASSERT(ALIGN_UP(base, FRAME_SIZE) == base);
107,7 → 109,8
*/
 
for (i = 0; i < leaf->keys; i++) {
if (leaf->key[i] == ALIGN_DOWN(addr, PAGE_SIZE)) {
if (leaf->key[i] ==
ALIGN_DOWN(addr, PAGE_SIZE)) {
found = true;
break;
}
115,8 → 118,10
}
if (frame || found) {
frame_reference_add(ADDR2PFN(frame));
page_mapping_insert(AS, addr, frame, as_area_get_flags(area));
if (!used_space_insert(area, ALIGN_DOWN(addr, PAGE_SIZE), 1))
page_mapping_insert(AS, addr, frame,
as_area_get_flags(area));
if (!used_space_insert(area,
ALIGN_DOWN(addr, PAGE_SIZE), 1))
panic("Could not insert used space.\n");
mutex_unlock(&area->sh_info->lock);
return AS_PF_OK;
124,10 → 129,12
}
/*
* The area is either not shared or the pagemap does not contain the mapping.
* The area is either not shared or the pagemap does not contain the
* mapping.
*/
if (ALIGN_DOWN(addr, PAGE_SIZE) + PAGE_SIZE < entry->p_vaddr + entry->p_filesz) {
if (ALIGN_DOWN(addr, PAGE_SIZE) + PAGE_SIZE <
entry->p_vaddr + entry->p_filesz) {
/*
* Initialized portion of the segment. The memory is backed
* directly by the content of the ELF image. Pages are
138,11 → 145,13
*/
if (entry->p_flags & PF_W) {
frame = (uintptr_t)frame_alloc(ONE_FRAME, 0);
memcpy((void *) PA2KA(frame), (void *) (base + i*FRAME_SIZE), FRAME_SIZE);
memcpy((void *) PA2KA(frame),
(void *) (base + i * FRAME_SIZE), FRAME_SIZE);
if (area->sh_info) {
frame_reference_add(ADDR2PFN(frame));
btree_insert(&area->sh_info->pagemap, ALIGN_DOWN(addr, PAGE_SIZE) - area->base,
btree_insert(&area->sh_info->pagemap,
ALIGN_DOWN(addr, PAGE_SIZE) - area->base,
(void *) frame, leaf);
}
 
149,7 → 158,8
} else {
frame = KA2PA(base + i*FRAME_SIZE);
}
} else if (ALIGN_DOWN(addr, PAGE_SIZE) >= ALIGN_UP(entry->p_vaddr + entry->p_filesz, PAGE_SIZE)) {
} else if (ALIGN_DOWN(addr, PAGE_SIZE) >=
ALIGN_UP(entry->p_vaddr + entry->p_filesz, PAGE_SIZE)) {
/*
* This is the uninitialized portion of the segment.
* It is not physically present in the ELF image.
161,7 → 171,8
 
if (area->sh_info) {
frame_reference_add(ADDR2PFN(frame));
btree_insert(&area->sh_info->pagemap, ALIGN_DOWN(addr, PAGE_SIZE) - area->base,
btree_insert(&area->sh_info->pagemap,
ALIGN_DOWN(addr, PAGE_SIZE) - area->base,
(void *) frame, leaf);
}
 
175,11 → 186,13
size = entry->p_filesz - (i<<PAGE_WIDTH);
frame = (uintptr_t)frame_alloc(ONE_FRAME, 0);
memsetb(PA2KA(frame) + size, FRAME_SIZE - size, 0);
memcpy((void *) PA2KA(frame), (void *) (base + i*FRAME_SIZE), size);
memcpy((void *) PA2KA(frame), (void *) (base + i * FRAME_SIZE),
size);
 
if (area->sh_info) {
frame_reference_add(ADDR2PFN(frame));
btree_insert(&area->sh_info->pagemap, ALIGN_DOWN(addr, PAGE_SIZE) - area->base,
btree_insert(&area->sh_info->pagemap,
ALIGN_DOWN(addr, PAGE_SIZE) - area->base,
(void *) frame, leaf);
}
 
211,15 → 224,18
uintptr_t base;
index_t i;
ASSERT((page >= entry->p_vaddr) && (page < entry->p_vaddr + entry->p_memsz));
ASSERT((page >= entry->p_vaddr) &&
(page < entry->p_vaddr + entry->p_memsz));
i = (page - entry->p_vaddr) >> PAGE_WIDTH;
base = (uintptr_t) (((void *) elf) + entry->p_offset);
ASSERT(ALIGN_UP(base, FRAME_SIZE) == base);
if (page + PAGE_SIZE < ALIGN_UP(entry->p_vaddr + entry->p_filesz, PAGE_SIZE)) {
if (page + PAGE_SIZE <
ALIGN_UP(entry->p_vaddr + entry->p_filesz, PAGE_SIZE)) {
if (entry->p_flags & PF_W) {
/*
* Free the frame with the copy of writable segment data.
* Free the frame with the copy of writable segment
* data.
*/
frame_free(frame);
#ifdef CONFIG_VIRT_IDX_DCACHE
228,9 → 244,9
}
} else {
/*
* The frame is either anonymous memory or the mixed case (i.e. lower
* part is backed by the ELF image and the upper is anonymous).
* In any case, a frame needs to be freed.
* The frame is either anonymous memory or the mixed case (i.e.
* lower part is backed by the ELF image and the upper is
* anonymous). In any case, a frame needs to be freed.
*/
frame_free(frame);
#ifdef CONFIG_VIRT_IDX_DCACHE
260,10 → 276,12
* Find the node in which to start linear search.
*/
if (area->flags & AS_AREA_WRITE) {
node = list_get_instance(area->used_space.leaf_head.next, btree_node_t, leaf_link);
node = list_get_instance(area->used_space.leaf_head.next,
btree_node_t, leaf_link);
} else {
(void) btree_search(&area->sh_info->pagemap, start_anon, &leaf);
node = btree_leaf_node_left_neighbour(&area->sh_info->pagemap, leaf);
node = btree_leaf_node_left_neighbour(&area->sh_info->pagemap,
leaf);
if (!node)
node = leaf;
}
272,7 → 290,8
* Copy used anonymous portions of the area to sh_info's page map.
*/
mutex_lock(&area->sh_info->lock);
for (cur = &node->leaf_link; cur != &area->used_space.leaf_head; cur = cur->next) {
for (cur = &node->leaf_link; cur != &area->used_space.leaf_head;
cur = cur->next) {
int i;
node = list_get_instance(cur, btree_node_t, leaf_link);
294,19 → 313,26
pte_t *pte;
/*
* Skip read-only pages that are backed by the ELF image.
* Skip read-only pages that are backed by the
* ELF image.
*/
if (!(area->flags & AS_AREA_WRITE))
if (base + (j + 1)*PAGE_SIZE <= start_anon)
if (base + (j + 1) * PAGE_SIZE <=
start_anon)
continue;
page_table_lock(area->as, false);
pte = page_mapping_find(area->as, base + j*PAGE_SIZE);
ASSERT(pte && PTE_VALID(pte) && PTE_PRESENT(pte));
btree_insert(&area->sh_info->pagemap, (base + j*PAGE_SIZE) - area->base,
pte = page_mapping_find(area->as,
base + j * PAGE_SIZE);
ASSERT(pte && PTE_VALID(pte) &&
PTE_PRESENT(pte));
btree_insert(&area->sh_info->pagemap,
(base + j * PAGE_SIZE) - area->base,
(void *) PTE_GET_FRAME(pte), NULL);
page_table_unlock(area->as, false);
frame_reference_add(ADDR2PFN(PTE_GET_FRAME(pte)));
 
pfn_t pfn = ADDR2PFN(PTE_GET_FRAME(pte));
frame_reference_add(pfn);
}
}
316,3 → 342,4
 
/** @}
*/