0,0 → 1,122 |
/* |
* Copyright (C) 2001-2004 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
|
/** @addtogroup ia32mm |
* @{ |
*/ |
/** @file |
*/ |
|
#include <arch/mm/page.h> |
#include <genarch/mm/page_pt.h> |
#include <arch/mm/frame.h> |
#include <mm/frame.h> |
#include <mm/page.h> |
#include <mm/as.h> |
#include <arch/types.h> |
#include <align.h> |
#include <config.h> |
#include <func.h> |
#include <arch/interrupt.h> |
#include <arch/asm.h> |
#include <debug.h> |
#include <memstr.h> |
#include <print.h> |
#include <interrupt.h> |
|
void page_arch_init(void) |
{ |
uintptr_t cur; |
int flags; |
|
if (config.cpu_active == 1) { |
page_mapping_operations = &pt_mapping_operations; |
|
/* |
* PA2KA(identity) mapping for all frames until last_frame. |
*/ |
for (cur = 0; cur < last_frame; cur += FRAME_SIZE) { |
flags = PAGE_CACHEABLE; |
if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size)) |
flags |= PAGE_GLOBAL; |
page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags); |
} |
|
exc_register(14, "page_fault", (iroutine) page_fault); |
write_cr3((uintptr_t) AS_KERNEL->page_table); |
} |
else { |
write_cr3((uintptr_t) AS_KERNEL->page_table); |
} |
|
paging_on(); |
} |
|
|
uintptr_t hw_map(uintptr_t physaddr, size_t size) |
{ |
if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH)) |
panic("Unable to map physical memory %p (%d bytes)", physaddr, size) |
|
uintptr_t virtaddr = PA2KA(last_frame); |
pfn_t i; |
for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) |
page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE); |
|
last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE); |
|
return virtaddr; |
} |
|
void page_fault(int n, istate_t *istate) |
{ |
uintptr_t page; |
pf_access_t access; |
|
page = read_cr2(); |
|
if (istate->error_word & PFERR_CODE_RSVD) |
panic("Reserved bit set in page directory.\n"); |
|
if (istate->error_word & PFERR_CODE_RW) |
access = PF_ACCESS_WRITE; |
else |
access = PF_ACCESS_READ; |
|
if (as_page_fault(page, access, istate) == AS_PF_FAULT) { |
fault_if_from_uspace(istate, "Page fault: %#x", page); |
|
PRINT_INFO_ERRCODE(istate); |
printf("page fault address: %#x\n", page); |
panic("page fault\n"); |
} |
} |
|
/** @} |
*/ |
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