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Ignore whitespace Rev 3664 → Rev 3665

/branches/sparc/kernel/arch/ia64/src/mm/tlb.c
475,6 → 475,73
}
}
 
 
 
static int is_io_page_accessible(int page)
{
if(TASK->arch.iomap) return bitmap_get(TASK->arch.iomap,page);
else return 0;
}
 
#define IO_FRAME_BASE 0xFFFFC000000
 
/** There is special handling of memmaped lagacy io, because
* of 4KB sized access
* only for userspace
*
* @param va virtual address of page fault
* @param istate Structure with saved interruption state.
*
*
* @return 1 on success, 0 on fail
*/
static int try_memmap_io_insertion(uintptr_t va, istate_t *istate)
{
if((va >= IO_OFFSET ) && (va < IO_OFFSET + (1<<IO_PAGE_WIDTH)))
if(TASK){
uint64_t io_page=(va & ((1<<IO_PAGE_WIDTH)-1)) >> (USPACE_IO_PAGE_WIDTH);
if(is_io_page_accessible(io_page)){
//printf("Insert %llX\n",va);
 
uint64_t page,frame;
 
page = IO_OFFSET + (1 << USPACE_IO_PAGE_WIDTH) * io_page;
frame = IO_FRAME_BASE + (1 << USPACE_IO_PAGE_WIDTH) * io_page;
 
 
tlb_entry_t entry;
entry.word[0] = 0;
entry.word[1] = 0;
entry.p = true; /* present */
entry.ma = MA_UNCACHEABLE;
entry.a = true; /* already accessed */
entry.d = true; /* already dirty */
entry.pl = PL_USER;
entry.ar = AR_READ | AR_WRITE;
entry.ppn = frame >> PPN_SHIFT; //MUSIM spocitat frame
entry.ps = USPACE_IO_PAGE_WIDTH;
dtc_mapping_insert(page, TASK->as->asid, entry); //Musim zjistit ASID
return 1;
}else {
fault_if_from_uspace(istate,"IO access fault at %p",va);
return 0;
}
} else
return 0;
else
return 0;
return 0;
 
}
 
 
 
 
/** Data TLB fault handler for faults with VHPT turned off.
*
* @param vector Interruption vector.
511,10 → 578,11
dtc_pte_copy(t);
page_table_unlock(AS, true);
} else {
page_table_unlock(AS, true);
if (try_memmap_io_insertion(va,istate)) return;
/*
* Forward the page fault to the address space page fault handler.
*/
page_table_unlock(AS, true);
if (as_page_fault(va, PF_ACCESS_READ, istate) == AS_PF_FAULT) {
fault_if_from_uspace(istate,"Page fault at %p",va);
panic("%s: va=%p, rid=%d, iip=%p\n", __func__, va, rid, istate->cr_iip);