WebSVN – HelenOS – Diff – /trunk/boot/arch/sparc64/loader/main.c

         release, revision, timestamp);
+}
 void bootstrap(void)
+{
+    void *base = (void *) KERNEL_VIRTUAL_ADDRESS;
+    void *balloc_base;
+    unsigned int top = 0;
+    int i, j;
     version_print();
     init_components(components);
     if (!ofw_get_physmem_start(&bootinfo.physmem_start)) {
      * We just need plain physical address so we fix it up.
      */
     if (silo_ramdisk_image) {
         silo_ramdisk_image += bootinfo.physmem_start;
         silo_ramdisk_image -= 0x400000;
+        /* Install 1:1 mapping for the ramdisk. */
+        if (ofw_map((void *)((uintptr_t)silo_ramdisk_image),
+            (void *)((uintptr_t)silo_ramdisk_image),
+            silo_ramdisk_size, -1) != 0) {
+            printf("Failed to map ramdisk.\n");
+            halt();
+        }
+    }
     printf("\nSystem info\n");
     printf(" memory: %dM starting at %P\n",
         bootinfo.memmap.total >> 20, bootinfo.physmem_start);
     printf("\nMemory statistics\n");
     printf(" kernel entry point at %P\n", KERNEL_VIRTUAL_ADDRESS);
     printf(" %P: boot info structure\n", &bootinfo);
+    /*
+     * Figure out destination address for each component.
+     * In this phase, we don't copy the components yet because we want to
+     * to be careful not to overwrite anything, especially the components
+     * which haven't been copied yet.
+     */
-    unsigned int i;
+    bootinfo.taskmap.count = 0;
-    for (i = 0; i < COMPONENTS; i++)
+    for (i = 0; i < COMPONENTS; i++) {
         printf(" %P: %s image (size %d bytes)\n", components[i].start,
             components[i].name, components[i].size);
+        top = ALIGN_UP(top, PAGE_SIZE);
+        if (i > 0) {
+            if (bootinfo.taskmap.count == TASKMAP_MAX_RECORDS) {
+                printf("Skipping superfluous components.\n");
+                break;
+            }
+            bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr =
+                base + top;
+            bootinfo.taskmap.tasks[bootinfo.taskmap.count].size =
+                components[i].size;
+            bootinfo.taskmap.count++;
+        }
+        top += components[i].size;
+    }
-    void * base = (void *) KERNEL_VIRTUAL_ADDRESS;
+    j = bootinfo.taskmap.count - 1; /* do not consider ramdisk */
-    unsigned int top = 0;
-    printf("\nCopying components\n");
+    if (silo_ramdisk_image) {
+        /* Treat the ramdisk as the last bootinfo task. */
-    bootinfo.taskmap.count = 0;
+        if (bootinfo.taskmap.count == TASKMAP_MAX_RECORDS) {
-    for (i = 0; i < COMPONENTS; i++) {
+            printf("Skipping ramdisk.\n");
-        printf(" %s...", components[i].name);
+            goto skip_ramdisk;
+        }
         top = ALIGN_UP(top, PAGE_SIZE);
+        bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr =
+            base + top;
+        bootinfo.taskmap.tasks[bootinfo.taskmap.count].size =
+            silo_ramdisk_size;
+        bootinfo.taskmap.count++;
+        printf("\nCopying ramdisk...");
+        /*
+         * Claim and map the whole ramdisk as it may exceed the area
+         * given to us by SILO.
+         */
+        (void) ofw_claim_phys(base + top, silo_ramdisk_size);
+        (void) ofw_map(base + top, base + top, silo_ramdisk_size, -1);
+        /*
+         * FIXME If the source and destination overlap, it may be
+         * desirable to copy in reverse order, depending on how the two
+         * regions overlap.
+         */
+        memcpy(base + top, (void *)((uintptr_t)silo_ramdisk_image),
+            silo_ramdisk_size);
+        printf("done.\n");
+        top += silo_ramdisk_size;
+    }
+skip_ramdisk:
+    /*
+     * Now we can proceed to copy the components. We do it in reverse order
+     * so that we don't overwrite anything even if the components overlap
+     * with base.
+     */
+    printf("\nCopying bootinfo tasks\n");
+    for (i = COMPONENTS - 1; i > 0; i--, j--) {
+        printf(" %s...", components[i].name);
         /*
          * At this point, we claim the physical memory that we are
          * going to use. We should be safe in case of the virtual
          * address space because the OpenFirmware, according to its
          * SPARC binding, should restrict its use of virtual memory
          * to addresses from [0xffd00000; 0xffefffff] and
          * [0xfe000000; 0xfeffffff].
+         *
+         * XXX We don't map this piece of memory. We simply rely on
+         *     SILO to have it done for us already in this case.
          */
-        (void) ofw_claim_phys(bootinfo.physmem_start + base + top,
+        (void) ofw_claim_phys(bootinfo.physmem_start +
+            bootinfo.taskmap.tasks[j].addr,
             ALIGN_UP(components[i].size, PAGE_SIZE));
-        memcpy(base + top, components[i].start, components[i].size);
-        if (i > 0) {
-            bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr =
+        memcpy((void *)bootinfo.taskmap.tasks[j].addr,
-                base + top;
-            bootinfo.taskmap.tasks[bootinfo.taskmap.count].size =
-                components[i].size;
+            components[i].start, components[i].size);
-            bootinfo.taskmap.count++;
-        }
-        top += components[i].size;
         printf("done.\n");
+    }
+    printf("\nCopying kernel...");
+    (void) ofw_claim_phys(bootinfo.physmem_start + base,
+        ALIGN_UP(components[0].size, PAGE_SIZE));
+    memcpy(base, components[0].start, components[0].size);
+    printf("done.\n");
     /*
-     * Claim the physical memory for the boot allocator.
+     * Claim and map the physical memory for the boot allocator.
      * Initialize the boot allocator.
      */
+    balloc_base = base + ALIGN_UP(top, PAGE_SIZE);
-    (void) ofw_claim_phys(bootinfo.physmem_start +
+    (void) ofw_claim_phys(bootinfo.physmem_start + balloc_base,
+        BALLOC_MAX_SIZE);
-        base + ALIGN_UP(top, PAGE_SIZE), BALLOC_MAX_SIZE);
+    (void) ofw_map(balloc_base, balloc_base, BALLOC_MAX_SIZE, -1);
-    balloc_init(&bootinfo.ballocs, ALIGN_UP(((uintptr_t) base) + top,
+    balloc_init(&bootinfo.ballocs, (uintptr_t)balloc_base);
-        PAGE_SIZE));
     printf("\nCanonizing OpenFirmware device tree...");
     bootinfo.ofw_root = ofw_tree_build();
     printf("done.\n");

Subversion Repositories HelenOS

(root)/trunk/boot/arch/sparc64/loader/main.c – Rev 3388 → 3399