WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/amd64/src/interrupt.c

 /*
  * 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.
  */
 #include <arch/interrupt.h>
 #include <print.h>
 #include <debug.h>
 #include <panic.h>
 #include <arch/i8259.h>
 #include <func.h>
 #include <cpu.h>
 #include <arch/asm.h>
 #include <mm/tlb.h>
 #include <mm/as.h>
 #include <arch.h>
 #include <symtab.h>
 #include <arch/asm.h>
 #include <proc/scheduler.h>
 #include <proc/thread.h>
 static void print_info_errcode(int n, istate_t *istate)
+{
     char *symbol;
     __u64 *x = &istate->stack[0];
     if (!(symbol=get_symtab_entry(istate->rip)))
         symbol = "";
     printf("-----EXCEPTION(%d) OCCURED----- ( %s )\n",n, __FUNCTION__);
     printf("%%rip: %Q (%s)\n",istate->rip, symbol);
     printf("ERROR_WORD=%Q\n", istate->error_word);
     printf("%%rcs=%Q, flags=%Q, %%cr0=%Q\n", istate->cs, istate->rflags,read_cr0());
     printf("%%rax=%Q, %%rbx=%Q, %%rcx=%Q\n",istate->rax,istate->rbx,istate->rcx);
     printf("%%rdx=%Q, %%rsi=%Q, %%rdi=%Q\n",istate->rdx,istate->rsi,istate->rdi);
     printf("%%r8 =%Q, %%r9 =%Q, %%r10=%Q\n",istate->r8,istate->r9,istate->r10);
     printf("%%r11=%Q, %%r12=%Q, %%r13=%Q\n",istate->r11,istate->r12,istate->r13);
     printf("%%r14=%Q, %%r15=%Q, %%rsp=%Q\n",istate->r14,istate->r15,&istate->stack[0]);
     printf("%%rbp=%Q\n",istate->rbp);
     printf("stack: %Q, %Q, %Q\n", x[5], x[6], x[7]);
     printf("       %Q, %Q, %Q\n", x[8], x[9], x[10]);
     printf("       %Q, %Q, %Q\n", x[11], x[12], x[13]);
     printf("       %Q, %Q, %Q\n", x[14], x[15], x[16]);
+}
 /*
  * Interrupt and exception dispatching.
  */
 void (* disable_irqs_function)(__u16 irqmask) = NULL;
 void (* enable_irqs_function)(__u16 irqmask) = NULL;
 void (* eoi_function)(void) = NULL;
 void null_interrupt(int n, istate_t *istate)
+{
     print_info_errcode(n, istate);
     panic("unserviced interrupt\n");
+}
 void gp_fault(int n, istate_t *istate)
+{
     print_info_errcode(n, istate);
     panic("general protection fault\n");
+}
 void ss_fault(int n, istate_t *istate)
+{
     print_info_errcode(n, istate);
     panic("stack fault\n");
+}
 void nm_fault(int n, istate_t *istate)
+{
 #ifdef CONFIG_FPU_LAZY
     scheduler_fpu_lazy_request();
 #else
     panic("fpu fault");
 #endif
+}
+/* Definitions for identic page mapper */
+pte_t helper_ptl1[512] __attribute__((aligned (PAGE_SIZE)));
+pte_t helper_ptl2[512] __attribute__((aligned (PAGE_SIZE)));
+pte_t helper_ptl3[512] __attribute__((aligned (PAGE_SIZE)));
+extern pte_t ptl_0; /* From boot.S */
+#define PTL1_PRESENT(ptl0, page) (!(GET_PTL1_FLAGS_ARCH(ptl0, PTL0_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))
+#define PTL2_PRESENT(ptl1, page) (!(GET_PTL2_FLAGS_ARCH(ptl1, PTL1_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))
+#define PTL3_PRESENT(ptl2, page) (!(GET_PTL3_FLAGS_ARCH(ptl2, PTL2_INDEX_ARCH(page)) & PAGE_NOT_PRESENT))
+#define PTL1_ADDR(ptl0, page) ((pte_t *)PA2KA(GET_PTL1_ADDRESS_ARCH(ptl0, PTL0_INDEX_ARCH(page))))
+#define PTL2_ADDR(ptl1, page) ((pte_t *)PA2KA(GET_PTL2_ADDRESS_ARCH(ptl1, PTL1_INDEX_ARCH(page))))
+#define PTL3_ADDR(ptl2, page) ((pte_t *)PA2KA(GET_PTL3_ADDRESS_ARCH(ptl2, PTL2_INDEX_ARCH(page))))
+#define SETUP_PTL1(ptl0, page, tgt)  {  \
+    SET_PTL1_ADDRESS_ARCH(ptl0, PTL0_INDEX_ARCH(page), (__address)KA2PA(tgt)); \
+        SET_PTL1_FLAGS_ARCH(ptl0, PTL0_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \
+    }
+#define SETUP_PTL2(ptl1, page, tgt)  {  \
+    SET_PTL2_ADDRESS_ARCH(ptl1, PTL1_INDEX_ARCH(page), (__address)KA2PA(tgt)); \
+        SET_PTL2_FLAGS_ARCH(ptl1, PTL1_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \
+    }
+#define SETUP_PTL3(ptl2, page, tgt)  {  \
+    SET_PTL3_ADDRESS_ARCH(ptl2, PTL2_INDEX_ARCH(page), (__address)KA2PA(tgt)); \
+        SET_PTL3_FLAGS_ARCH(ptl2, PTL2_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \
+    }
+#define SETUP_FRAME(ptl3, page, tgt)  { \
+    SET_FRAME_ADDRESS_ARCH(ptl3, PTL3_INDEX_ARCH(page), (__address)KA2PA(tgt)); \
+        SET_FRAME_FLAGS_ARCH(ptl3, PTL3_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \
+    }
+/** Identic page mapper
+ *
+ * We need to map whole physical memory identically before the page subsystem
+ * is initializaed. This thing clears page table and fills in the specific
+ * items.
+ */
+void ident_page_fault(int n, istate_t *istate)
+{
+    __address page;
+    static __address oldpage = 0;
+    pte_t *aptl_1, *aptl_2, *aptl_3;
+    page = read_cr2();
+    if (oldpage) {
+        /* Unmap old address */
+        aptl_1 = PTL1_ADDR(&ptl_0, oldpage);
+        aptl_2 = PTL2_ADDR(aptl_1, oldpage);
+        aptl_3 = PTL3_ADDR(aptl_2, oldpage);
+        SET_FRAME_FLAGS_ARCH(aptl_3, PTL3_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT);
+        if (aptl_3 == helper_ptl3)
+            SET_PTL3_FLAGS_ARCH(aptl_2, PTL2_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT);
+        if (aptl_2 == helper_ptl2)
+            SET_PTL2_FLAGS_ARCH(aptl_1, PTL1_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT);
+        if (aptl_1 == helper_ptl1)
+            SET_PTL1_FLAGS_ARCH(&ptl_0, PTL0_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT);
+    }
+    if (PTL1_PRESENT(&ptl_0, page))
+        aptl_1 = PTL1_ADDR(&ptl_0, page);
+    else {
+        SETUP_PTL1(&ptl_0, page, helper_ptl1);
+        aptl_1 = helper_ptl1;
+    }
+    if (PTL2_PRESENT(aptl_1, page))
+        aptl_2 = PTL2_ADDR(aptl_1, page);
+    else {
+        SETUP_PTL2(aptl_1, page, helper_ptl2);
+        aptl_2 = helper_ptl2;
+    }
+    if (PTL3_PRESENT(aptl_2, page))
+        aptl_3 = PTL3_ADDR(aptl_2, page);
+    else {
+        SETUP_PTL3(aptl_2, page, helper_ptl3);
+        aptl_3 = helper_ptl3;
+    }
+    SETUP_FRAME(aptl_3, page, page);
+    oldpage = page;
+}
 void page_fault(int n, istate_t *istate)
+{
     __address page;
     page = read_cr2();
     if (!as_page_fault(page)) {
         print_info_errcode(n, istate);
         printf("Page fault address: %Q\n", page);
         panic("page fault\n");
+    }
+}
 void tlb_shootdown_ipi(int n, istate_t *istate)
+{
     trap_virtual_eoi();
     tlb_shootdown_ipi_recv();
+}
 void trap_virtual_enable_irqs(__u16 irqmask)
+{
     if (enable_irqs_function)
         enable_irqs_function(irqmask);
     else
         panic("no enable_irqs_function\n");
+}
 void trap_virtual_disable_irqs(__u16 irqmask)
+{
     if (disable_irqs_function)
         disable_irqs_function(irqmask);
     else
         panic("no disable_irqs_function\n");
+}
 void trap_virtual_eoi(void)
+{
     if (eoi_function)
         eoi_function();
     else
         panic("no eoi_function\n");
+}

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/amd64/src/interrupt.c – Rev 1021 → 1050