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/*

 * Test exchange registers system call.

 *

 * Copyright (C) 2010 B Labs Ltd.

 *

 * Author: Bahadir Balban

 */

#include <l4lib/exregs.h>

#include <l4lib/lib/thread.h>

#include <stdio.h>

#include <string.h>

#include <tests.h>

int test_exregs_read_write(void)

{

        struct task_ids ids;

        struct exregs_data exregs[2];

        int err;

        /* Get own space id */

        l4_getid(&ids);

        /*

         * Create a thread in the same space.

         * Thread is not runnable.

         */

        if ((err = l4_thread_control(THREAD_CREATE | TC_SHARE_SPACE,

                                     &ids)) < 0) {

                dbg_printf("Thread create failed. "

                           "err=%d\n", err);

                return err;

        }

        dbg_printf("Thread created successfully. "

                   "tid=%d\n", ids.tid);

        /*

         * Prepare a context part full of 0xFF

         */

        memset(&exregs[0].context, 0xFF, sizeof(exregs[1].context));

        exregs[0].valid_vect = 0xFFFFFFFF;

        /* Write to context */

        if ((err = l4_exchange_registers(&exregs[0], ids.tid)) < 0)

                goto out;

        /* Set the other as read-all */

        exregs_set_read(&exregs[1]);

        exregs[1].valid_vect = 0xFFFFFFFF;

        if ((err = l4_exchange_registers(&exregs[1],

                                         ids.tid)) < 0)

                goto out;

        /*

         * Read back all context and compare results

         */

        if (memcmp(&exregs[0].context, &exregs[1].context,

                   sizeof(exregs[0].context))) {

                err = -1;

                goto out;

        }

out:

        /*

         * Destroy the thread

         */

        if ((err = l4_thread_control(THREAD_DESTROY, &ids)) < 0) {

                dbg_printf("Thread destroy failed. err=%d\n",

                           err);

        }

        return 0;

}

int test_api_exregs(void)

{

        int err;

        if ((err = test_exregs_read_write()) < 0)

                goto out_err;

        /*

         * TODO: Should add more tests here, e.g. setting

         * values of a thread we're not a pager of.

         */

        printf("EXCHANGE REGISTERS:            -- PASSED --\n");

        return 0;

out_err:

        printf("EXCHANGE REGISTERS:            -- FAILED --\n");

        return err;

}