source: mainline/kernel/arch/arm32/src/arm32.c

/*
 * Copyright (c) 2007 Michal Kebrt
 * 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 kernel_arm32
 * @{
 */
/** @file
 *  @brief ARM32 architecture specific functions.
 */

#include <arch.h>
#include <arch/arch.h>
#include <config.h>
#include <genarch/fb/fb.h>
#include <abi/fb/visuals.h>
#include <console/console.h>
#include <ddi/irq.h>
#include <config.h>
#include <interrupt.h>
#include <arch/regutils.h>
#include <arch/machine_func.h>
#include <userspace.h>
#include <macros.h>
#include <str.h>
#include <arch/ras.h>
#include <sysinfo/sysinfo.h>

static void arm32_pre_mm_init(void);
static void arm32_post_mm_init(void);
static void arm32_post_smp_init(void);

arch_ops_t arm32_ops = {
        .pre_mm_init = arm32_pre_mm_init,
        .post_mm_init = arm32_post_mm_init,
        .post_smp_init = arm32_post_smp_init,
};

arch_ops_t *arch_ops = &arm32_ops;

/** Performs arm32-specific initialization before main_bsp() is called. */
void arm32_pre_main(void *entry __attribute__((unused)), bootinfo_t *bootinfo)
{
        init.cnt = min3(bootinfo->taskmap.cnt, TASKMAP_MAX_RECORDS, CONFIG_INIT_TASKS);

        size_t i;
        for (i = 0; i < init.cnt; i++) {
                init.tasks[i].paddr = KA2PA(bootinfo->taskmap.tasks[i].addr);
                init.tasks[i].size = bootinfo->taskmap.tasks[i].size;
                str_cpy(init.tasks[i].name, CONFIG_TASK_NAME_BUFLEN,
                    bootinfo->taskmap.tasks[i].name);
        }

        /* Initialize machine_ops pointer. */
        machine_ops_init();
}

/** Performs arm32 specific initialization before mm is initialized. */
void arm32_pre_mm_init(void)
{
        /* It is not assumed by default */
        interrupts_disable();
}

/** Performs arm32 specific initialization afterr mm is initialized. */
void arm32_post_mm_init(void)
{
        machine_init();

        /* Initialize exception dispatch table */
        exception_init();
        interrupt_init();

        /* Initialize Restartable Atomic Sequences support. */
        ras_init();

        machine_output_init();
}

/** Performs arm32 specific tasks needed after the multiprocessing is
 * initialized.
 *
 * Currently the function is empty because SMP is not supported.
 */
void arm32_post_smp_init(void)
{
        machine_input_init();
        const char *platform = machine_get_platform_name();

        sysinfo_set_item_data("platform", NULL, (void *) platform,
            str_size(platform));
}

/** Performs arm32 specific tasks needed before the new task is run. */
void before_task_runs_arch(void)
{
}

/** Performs arm32 specific tasks needed before the new thread is scheduled.
 *
 * It sets supervisor_sp.
 */
void before_thread_runs_arch(void)
{
        uint8_t *stck;

        stck = &THREAD->kstack[STACK_SIZE];
        supervisor_sp = (uintptr_t) stck;
}

/** Performs arm32 specific tasks before a thread stops running.
 *
 * Currently the function is empty.
 */
void after_thread_ran_arch(void)
{
}

/** Halts CPU. */
void cpu_halt(void)
{
        while (true)
                machine_cpu_halt();
}

/** Reboot. */
void arch_reboot(void)
{
        /* not implemented */
        while (true)
                ;
}

/** Construct function pointer
 *
 * @param fptr   function pointer structure
 * @param addr   function address
 * @param caller calling function address
 *
 * @return address of the function pointer
 *
 */
void *arch_construct_function(fncptr_t *fptr, void *addr, void *caller)
{
        return addr;
}

void irq_initialize_arch(irq_t *irq)
{
        (void) irq;
}

/** @}
 */