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

 /*
  * Copyright (c) 2005 Martin Decky
  * Copyright (c) 2006 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 "main.h"
 #include <printf.h>
 #include "asm.h"
 #include "_components.h"
 #include <balloc.h>
 #include <ofw.h>
 #include <ofw_tree.h>
 #include "ofwarch.h"
 #include <align.h>
 #include <string.h>
 bootinfo_t bootinfo;
 component_t components[COMPONENTS];
 char *release = RELEASE;
 #ifdef REVISION
     char *revision = ", revision " REVISION;
 #else
     char *revision = "";
 #endif
 #ifdef TIMESTAMP
     char *timestamp = "\nBuilt on " TIMESTAMP;
 #else
     char *timestamp = "";
 #endif
-/** UltraSPARC subarchitecture - 1 for US, 3 for US3 */
+/** UltraSPARC subarchitecture - 1 for US, 3 for US3, 0 for other */
-uint8_t subarchitecture;
+uint8_t subarchitecture = 0;
 /**
  * mask of the MID field inside the ICBUS_CONFIG register shifted by
  * MID_SHIFT bits to the right
  */
 uint16_t mid_mask;
 /** Print version information. */
 static void version_print(void)
+{
     printf("HelenOS SPARC64 Bootloader\nRelease %s%s%s\n"
         "Copyright (c) 2006 HelenOS project\n",
         release, revision, timestamp);
+}
 /* the lowest ID (read from the VER register) of some US3 CPU model */
 #define FIRST_US3_CPU   0x14
 /* the greatest ID (read from the VER register) of some US3 CPU model */
 #define LAST_US3_CPU    0x19
 /* UltraSPARC IIIi processor implementation code */
 #define US_IIIi_CODE    0x15
+/* max. length of the "compatible" property of the root node */
+#define COMPATIBLE_PROP_MAXLEN  64
+/*
+ * HelenOS bootloader will use these constants to distinguish particular
+ * UltraSPARC architectures
+ */
+#define COMPATIBLE_SUN4U    10
+#define COMPATIBLE_SUN4V    20
+/** US architecture. COMPATIBLE_SUN4U for sun4v, COMPATIBLE_SUN4V for sun4u */
+static uint8_t architecture;
 /**
+ * Detects the UltraSPARC architecture (sun4u and sun4v currently supported)
+ * by inspecting the property called "compatible" in the OBP root node.
+ */
+static void detect_architecture(void)
+{
+    phandle root = ofw_find_device("/");
+    char compatible[COMPATIBLE_PROP_MAXLEN];
+    if (ofw_get_property(root, "compatible", compatible,
+            COMPATIBLE_PROP_MAXLEN) <= 0) {
+        printf("Unable to determine architecture, default: sun4u.\n");
+        architecture = COMPATIBLE_SUN4U;
+        return;
+    }
+    if (strcmp(compatible, "sun4v") == 0) {
+        architecture = COMPATIBLE_SUN4V;
+    } else {
+        /*
+         * As not all sun4u machines have "sun4u" in their "compatible"
+         * OBP property (e.g. Serengeti's OBP "compatible" property is
+         * "SUNW,Serengeti"), we will by default fallback to sun4u if
+         * an unknown value of the "compatible" property is encountered.
+         */
+        architecture = COMPATIBLE_SUN4U;
+    }
+}
+/**
+ * Detects the subarchitecture (US, US3) of the sun4u
- * Sets the global variables "subarchitecture" and "mid_mask" to
+ * processor. Sets the global variables "subarchitecture" and "mid_mask" to
  * correct values.
  */
 static void detect_subarchitecture(void)
+{
     uint64_t v;
     asm volatile ("rdpr %%ver, %0\n" : "=r" (v));
     v = (v << 16) >> 48;
     if ((v >= FIRST_US3_CPU) && (v <= LAST_US3_CPU)) {
         subarchitecture = SUBARCH_US3;
         if (v == US_IIIi_CODE)
             mid_mask = (1 << 5) - 1;
         else
             mid_mask = (1 << 10) - 1;
     } else if (v < FIRST_US3_CPU) {
         subarchitecture = SUBARCH_US;
         mid_mask = (1 << 5) - 1;
     } else {
         printf("\nThis CPU is not supported by HelenOS.");
+    }
+}
+/**
+ * Performs sun4u-specific initialization. The components are expected
+ * to be already copied and boot allocator initialized.
+ */
+static void bootstrap_sun4u(void)
+{
+    printf("\nCanonizing OpenFirmware device tree...");
+    bootinfo.ofw_root = ofw_tree_build();
+    printf("done.\n");
+    detect_subarchitecture();
+#ifdef CONFIG_SMP
+    printf("\nChecking for secondary processors...");
+    if (!ofw_cpu())
+        printf("Error: unable to get CPU properties\n");
+    printf("done.\n");
+#endif
+    setup_palette();
+}
+/**
+ * Performs sun4v-specific initialization. The components are expected
+ * to be already copied and boot allocator initialized.
+ */
+static void bootstrap_sun4v(void)
+{
+}
 void bootstrap(void)
+{
     void *base = (void *) KERNEL_VIRTUAL_ADDRESS;
     void *balloc_base;
     unsigned int top = 0;
     int i, j;
-    version_print();
-    detect_subarchitecture();
+    detect_architecture();
     init_components(components);
     if (!ofw_get_physmem_start(&bootinfo.physmem_start)) {
         printf("Error: unable to get start of physical memory.\n");
         halt();
+    }
     if (!ofw_memmap(&bootinfo.memmap)) {
         printf("Error: unable to get memory map, halting.\n");
         halt();
+    }
     if (bootinfo.memmap.total == 0) {
         printf("Error: no memory detected, halting.\n");
         halt();
+    }
     /*
      * SILO for some reason adds 0x400000 and subtracts
      * bootinfo.physmem_start to/from silo_ramdisk_image.
      * 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.
      */
     bootinfo.taskmap.count = 0;
     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;
+    }
     j = bootinfo.taskmap.count - 1; /* do not consider ramdisk */
     if (silo_ramdisk_image) {
         /* Treat the ramdisk as the last bootinfo task. */
         if (bootinfo.taskmap.count == TASKMAP_MAX_RECORDS) {
             printf("Skipping ramdisk.\n");
             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);
         memmove(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 +
             bootinfo.taskmap.tasks[j].addr,
             ALIGN_UP(components[i].size, PAGE_SIZE));
         memcpy((void *)bootinfo.taskmap.tasks[j].addr,
             components[i].start, 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 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 + balloc_base,
         BALLOC_MAX_SIZE);
     (void) ofw_map(balloc_base, balloc_base, BALLOC_MAX_SIZE, -1);
     balloc_init(&bootinfo.ballocs, (uintptr_t)balloc_base);
-    printf("\nCanonizing OpenFirmware device tree...");
+    /* perform architecture-specific initialization */
-    bootinfo.ofw_root = ofw_tree_build();
+    if (architecture == COMPATIBLE_SUN4U) {
-    printf("done.\n");
+        bootstrap_sun4u();
-#ifdef CONFIG_SMP
-    printf("\nChecking for secondary processors...");
+    } else if (architecture == COMPATIBLE_SUN4V) {
-    if (!ofw_cpu())
+        bootstrap_sun4v();
-        printf("Error: unable to get CPU properties\n");
+    } else {
-    printf("done.\n");
+        printf("Unknown architecture.\n");
-#endif
+        halt();
+    }
-    setup_palette();
     printf("\nBooting the kernel...\n");
     jump_to_kernel((void *) KERNEL_VIRTUAL_ADDRESS,
         bootinfo.physmem_start | BSP_PROCESSOR, &bootinfo,
         sizeof(bootinfo));
+}

Subversion Repositories HelenOS

(root)/branches/sparc/boot/arch/sparc64/loader/main.c – Rev 3742 → 3743