diff options
Diffstat (limited to 'bsps/sparc64/shared/helenos/boot/sparc64/loader/main.c')
| -rw-r--r-- | bsps/sparc64/shared/helenos/boot/sparc64/loader/main.c | 441 |
1 files changed, 441 insertions, 0 deletions
diff --git a/bsps/sparc64/shared/helenos/boot/sparc64/loader/main.c b/bsps/sparc64/shared/helenos/boot/sparc64/loader/main.c new file mode 100644 index 0000000000..75579ed44c --- /dev/null +++ b/bsps/sparc64/shared/helenos/boot/sparc64/loader/main.c @@ -0,0 +1,441 @@ +/* + * 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. + */ + +/* + * Modifications are made to switch to using printk rather than printf, + * and to remove portions of the HelenOS bootstrap process that are + * unnecessary on RTEMS. The removed code is elided with #if 0 ... #endif + * blocks. + * + * Removes some header files. Adds back some missing defines. + */ + +#define RTEMS + +#include <bsp.h> +#include <rtems/bspIo.h> +#include <inttypes.h> +#include <string.h> + +#include <boot/main.h> +#include <boot/balloc.h> +#include <boot/ofw.h> +#include <boot/ofw_tree.h> +#include <boot/ofwarch.h> +#include <boot/align.h> + +#if 0 +#include "asm.h" +#include <printf.h> +#include "_components.h" +#include <macros.h> +#include <string.h> +#include <memstr.h> +#endif + +#include <asm.h> + +#if 0 +#define PAGE_WIDTH 14 +#define PAGE_SIZE (1 << PAGE_WIDTH) +#endif + +static bootinfo_t bootinfo; +#if 0 +static component_t components[COMPONENTS]; +static char *release = STRING(RELEASE); + +#ifdef REVISION + static char *revision = ", revision " STRING(REVISION); +#else + static char *revision = ""; +#endif + +#ifdef TIMESTAMP + static char *timestamp = "\nBuilt on " STRING(TIMESTAMP); +#else + static char *timestamp = ""; +#endif +#endif + +#if 0 +/** UltraSPARC subarchitecture - 1 for US, 3 for US3, 0 for other */ +static uint8_t subarchitecture = 0; +#endif + +#if 0 +/** + * mask of the MID field inside the ICBUS_CONFIG register shifted by + * MID_SHIFT bits to the right + */ +static uint16_t mid_mask; +#endif + +#if 0 +/** Print version information. */ +static void version_print(void) +{ + printk("HelenOS SPARC64 Bootloader\nRelease %s%s%s\n" + "Copyright (c) 2006 HelenOS project\n", + release, revision, timestamp); +} +#endif + +/* 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) { + printk("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; + } +} + +#if 0 +/** + * Detects the subarchitecture (US, US3) of the sun4u + * 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 + printk("\nThis CPU is not supported by HelenOS."); +} +#endif + +#if 0 +/** + * Performs sun4u-specific initialization. The components are expected + * to be already copied and boot allocator initialized. + * + * @param base kernel base virtual address + * @param top virtual address above which the boot allocator + * can make allocations + */ +static void bootstrap_sun4u(void *base, unsigned int top) +{ + void *balloc_base; + /* + * 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(bootinfo.physmem_start + balloc_base, balloc_base, + BALLOC_MAX_SIZE, -1); + balloc_init(&bootinfo.ballocs, (uintptr_t) balloc_base, + (uintptr_t) balloc_base); +#if 0 + printf("Setting up screens..."); + ofw_setup_screens(); + printf("done.\n"); +#endif +#if 0 + printf("Canonizing OpenFirmware device tree..."); +#endif + bootinfo.ofw_root = ofw_tree_build(); +#if 0 + printf("done.\n"); +#endif +#if 0 +#ifdef CONFIG_AP + printf("Checking for secondary processors..."); + if (!ofw_cpu(mid_mask, bootinfo.physmem_start)) + printf("Error: unable to get CPU properties\n"); + printf("done.\n"); +#endif +#endif +} +#endif + +#if 0 +/** + * * Performs sun4v-specific initialization. The components are expected + * * to be already copied and boot allocator initialized. + * */ +static void bootstrap_sun4v(void) +{ + /* + * When SILO booted, the OBP had established a virtual to physical + * memory mapping. This mapping is not an identity (because the + * physical memory starts on non-zero address) - this is not + * surprising. But! The mapping even does not map virtual address + * 0 onto the starting address of the physical memory, but onto an + * address which is 0x400000 bytes higher. The reason is that the + * OBP had already used the memory just at the beginning of the + * physical memory, so that memory cannot be used by SILO (nor + * bootloader). As for now, we solve it by a nasty workaround: + * we pretend that the physical memory starts 0x400000 bytes further + * than it actually does (and hence pretend that the physical memory + * is 0x400000 bytes smaller). Of course, the value 0x400000 will most + * probably depend on the machine and OBP version (the workaround now + * works on Simics). A solution would be to inspect the "available" + * property of the "/memory" node to find out which parts of memory + * are used by OBP and redesign the algorithm of copying + * kernel/init tasks/ramdisk from the bootable image to memory + * (which we must do anyway because of issues with claiming the memory + * on Serengeti). + */ + bootinfo.physmem_start += 0x400000; + bootinfo.memmap.zones[0].start += 0x400000; + bootinfo.memmap.zones[0].size -= 0x400000; +#if 0 + printf("The sun4v init finished."); +#endif +} +#endif + +void bootstrap(void) +{ +#if 0 + void *base = (void *) KERNEL_VIRTUAL_ADDRESS; + unsigned int top = 0; + unsigned int i; + unsigned int j; +#endif + + detect_architecture(); +#if 0 + init_components(components); +#endif + + if (!ofw_get_physmem_start(&bootinfo.physmem_start)) { + printk("Error: unable to get start of physical memory.\n"); + halt(); + } + + if (!ofw_memmap(&bootinfo.memmap)) { + printk("Error: unable to get memory map, halting.\n"); + halt(); + } + + if (bootinfo.memmap.total == 0) { + printk("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 RAM disk. */ + if (ofw_map((void *) ((uintptr_t) silo_ramdisk_image), + (void *) ((uintptr_t) silo_ramdisk_image), + silo_ramdisk_size, -1) != 0) { + printk("Failed to map RAM disk.\n"); + halt(); + } + } + + printk("\nMemory statistics (total %d MB, starting at %" PRIxPTR ")\n", + bootinfo.memmap.total >> 20, bootinfo.physmem_start); + printk(" %x: kernel entry point\n", KERNEL_VIRTUAL_ADDRESS); + printk(" %p: boot info structure\n", &bootinfo); + +#if 0 + /* + * 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; + strncpy(bootinfo.taskmap.tasks[ + bootinfo.taskmap.count].name, components[i].name, + BOOTINFO_TASK_NAME_BUFLEN); + bootinfo.taskmap.count++; + } + top += components[i].size; + } + + printf("\n"); + + /* Do not consider RAM disk */ + j = bootinfo.taskmap.count - 1; + + if (silo_ramdisk_image) { + /* Treat the RAM disk as the last bootinfo task. */ + if (bootinfo.taskmap.count == TASKMAP_MAX_RECORDS) { + printf("Skipping RAM disk.\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("Copying RAM disk..."); + + /* + * 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(bootinfo.physmem_start + 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("Copying tasks..."); + 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(".\n"); + + printf("Copying 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"); + + /* perform architecture-specific initialization */ + if (architecture == COMPATIBLE_SUN4U) { + bootstrap_sun4u(base, top); + } else if (architecture == COMPATIBLE_SUN4V) { + bootstrap_sun4v(); + } else { + printf("Unknown architecture.\n"); + halt(); + } + + printf("Booting the kernel...\n"); + jump_to_kernel((void *) KERNEL_VIRTUAL_ADDRESS, + bootinfo.physmem_start | BSP_PROCESSOR, &bootinfo, + sizeof(bootinfo), subarchitecture); +#endif +} |