source: mainline/boot/arch/sparc32/src/main.c@ 193d280c

/*
 * Copyright (c) 2013 Jakub Klama
 * 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 sparc32boot
 * @{
 */
/** @file
 * @brief Bootstrap.
 */

#include <arch/asm.h>
#include <arch/common.h>
#include <arch/arch.h>
#include <arch/ambapp.h>
#include <arch/mm.h>
#include <arch/main.h>
#include <arch/_components.h>
#include <halt.h>
#include <printf.h>
#include <memstr.h>
#include <version.h>
#include <macros.h>
#include <align.h>
#include <str.h>
#include <errno.h>
#include <inflate.h>

#define TOP2ADDR(top)  (((void *) PA2KA(BOOT_OFFSET)) + (top))

static bootinfo_t bootinfo;

void bootstrap(void)
{
        /* Initialize AMBA P&P device list */
        ambapp_scan();
        
        /* Look for UART */
        amba_device_t *uart = ambapp_lookup_first(GAISLER, GAISLER_APBUART);
        amba_uart_base = uart->bars[0].start;
        bootinfo.uart_base = amba_uart_base;
        bootinfo.uart_irq = uart->irq;
        
        /* Look for IRQMP */
        amba_device_t *irqmp = ambapp_lookup_first(GAISLER, GAISLER_IRQMP);
        bootinfo.intc_base = irqmp->bars[0].start;
        
        /* Look for timer */
        amba_device_t *timer = ambapp_lookup_first(GAISLER, GAISLER_GPTIMER);
        bootinfo.timer_base = timer->bars[0].start;
        bootinfo.timer_irq = timer->irq;
        
        /* Look for memory controller and obtain memory size */
        if (!ambapp_fake()) {
                amba_device_t *mctrl = ambapp_lookup_first(ESA, ESA_MCTRL);
                volatile mctrl_mcfg2_t *mcfg2 = (volatile mctrl_mcfg2_t *)
                    (mctrl->bars[0].start + 0x4);
                bootinfo.memsize = (1 << (13 + mcfg2->bank_size));
        } else
                bootinfo.memsize = 64 * 1024 * 1024;
        
        /* Standard output is now initialized */
        version_print();
        
        for (size_t i = 0; i < COMPONENTS; i++) {
                printf(" %p|%p: %s image (%u/%u bytes)\n", components[i].start,
                    components[i].start, components[i].name, components[i].inflated,
                    components[i].size);
        }
        
        ambapp_print_devices();
        
        printf("Memory size: %u MB\n", bootinfo.memsize >> 20);
        
        mmu_init();
        
        void *dest[COMPONENTS];
        size_t top = 0;
        size_t cnt = 0;
        bootinfo.cnt = 0;
        for (size_t i = 0; i < min(COMPONENTS, TASKMAP_MAX_RECORDS); i++) {
                top = ALIGN_UP(top, PAGE_SIZE);
                
                if (i > 0) {
                        bootinfo.tasks[bootinfo.cnt].addr = TOP2ADDR(top);
                        bootinfo.tasks[bootinfo.cnt].size = components[i].inflated;
                        
                        str_cpy(bootinfo.tasks[bootinfo.cnt].name,
                            BOOTINFO_TASK_NAME_BUFLEN, components[i].name);
                        
                        bootinfo.cnt++;
                }
                
                dest[i] = TOP2ADDR(top);
                
                top += components[i].inflated;
                cnt++;
        }
        
        printf("\nInflating components ... ");
        
        for (size_t i = cnt; i > 0; i--) {
                void *tail = components[i - 1].start + components[i - 1].size;
                if (tail >= dest[i - 1]) {
                        printf("\n%s: Image too large to fit (%p >= %p), halting.\n",
                            components[i].name, tail, dest[i - 1]);
                        halt();
                }
                
                printf("%s ", components[i - 1].name);
                
                int err = inflate(components[i - 1].start, components[i - 1].size,
                    dest[i - 1], components[i - 1].inflated);
                if (err != EOK) {
                        printf("\n%s: Inflating error %d\n", components[i - 1].name, err);
                        halt();
                }
        }
        
        printf("Booting the kernel ... \n");
        jump_to_kernel((void *) PA2KA(BOOT_OFFSET), &bootinfo);
}

/** @}
 */