| 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"); |
| } |
| } |
| |
| /** @} |
| */ |
| |