source: mainline/kernel/arch/ia64/src/ia64.c@ 8ce14e3

/*
 * Copyright (c) 2005 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.
 */

/** @addtogroup ia64
 * @{
 */
/** @file
 */

#include <arch.h>
#include <arch/ski/ski.h>
#include <arch/drivers/it.h>
#include <arch/interrupt.h>
#include <arch/barrier.h>
#include <arch/asm.h>
#include <arch/register.h>
#include <arch/types.h>
#include <arch/context.h>
#include <arch/stack.h>
#include <arch/mm/page.h>
#include <mm/as.h>
#include <config.h>
#include <userspace.h>
#include <console/console.h>
#include <proc/uarg.h>
#include <syscall/syscall.h>
#include <ddi/irq.h>
#include <ddi/device.h>
#include <arch/drivers/ega.h>
#include <arch/bootinfo.h>
#include <genarch/kbd/i8042.h>
#include <genarch/kbd/ns16550.h>
#include <smp/smp.h>
#include <smp/ipi.h>
#include <arch/atomic.h>
#include <panic.h>
#include <print.h>
#include <sysinfo/sysinfo.h>

/* NS16550 as a COM 1 */
#define NS16550_IRQ     (4 + LEGACY_INTERRUPT_BASE)
#define NS16550_PORT    0x3f8

bootinfo_t *bootinfo;

static uint64_t iosapic_base = 0xfec00000;

void arch_pre_main(void)
{
        /* Setup usermode init tasks. */

        unsigned int i;
        
        init.cnt = bootinfo->taskmap.count;
        
        for (i = 0; i < init.cnt; i++) {
                init.tasks[i].addr =
                    ((unsigned long) bootinfo->taskmap.tasks[i].addr) |
                    VRN_MASK;
                init.tasks[i].size = bootinfo->taskmap.tasks[i].size;
        }
}

void arch_pre_mm_init(void)
{
        /*
         * Set Interruption Vector Address (i.e. location of interruption vector
         * table).
         */
        iva_write((uintptr_t) &ivt);
        srlz_d();
        
}

static void iosapic_init(void)
{
        uint64_t IOSAPIC = PA2KA((unative_t)(iosapic_base)) | FW_OFFSET;
        int i;
        
        int myid, myeid;
        
        myid = ia64_get_cpu_id();
        myeid = ia64_get_cpu_eid();

        for (i = 0; i < 16; i++) { 
                if (i == 2)
                        continue;        /* Disable Cascade interrupt */
                ((uint32_t *)(IOSAPIC + 0x00))[0] = 0x10 + 2 * i;
                srlz_d();
                ((uint32_t *)(IOSAPIC + 0x10))[0] = LEGACY_INTERRUPT_BASE + i;
                srlz_d();
                ((uint32_t *)(IOSAPIC + 0x00))[0] = 0x10 + 2 * i + 1;
                srlz_d();
                ((uint32_t *)(IOSAPIC + 0x10))[0] = myid << (56 - 32) |
                    myeid << (48 - 32);
                srlz_d();
        }

}


void arch_post_mm_init(void)
{
        if (config.cpu_active == 1) {
                iosapic_init();
                irq_init(INR_COUNT, INR_COUNT);
#ifdef SKI
                ski_init_console();
#else   
                ega_init();
#endif  
        }
        it_init();
                
}

void arch_post_cpu_init(void)
{
}

void arch_pre_smp_init(void)
{
}


#ifdef I460GX
#define POLL_INTERVAL           50000           /* 50 ms */
/** Kernel thread for polling keyboard. */
static void i8042_kkbdpoll(void *arg)
{
        while (1) {
#ifdef CONFIG_NS16550
        #ifndef CONFIG_NS16550_INTERRUPT_DRIVEN
                ns16550_poll();
        #endif  
#else
        #ifndef CONFIG_I8042_INTERRUPT_DRIVEN
                i8042_poll();
        #endif  
#endif
                thread_usleep(POLL_INTERVAL);
        }
}
#endif

void arch_post_smp_init(void)
{
        thread_t *t;

        /*
         * Create thread that polls keyboard.
         */
#ifdef SKI
        t = thread_create(kkbdpoll, NULL, TASK, 0, "kkbdpoll", true);
        if (!t)
                panic("cannot create kkbdpoll\n");
        thread_ready(t);
#endif          

#ifdef I460GX
        devno_t kbd = device_assign_devno();

#ifdef CONFIG_NS16550
        ns16550_init(kbd, NS16550_PORT, NS16550_IRQ, NULL, NULL);
#else
        devno_t mouse = device_assign_devno();
        i8042_init(kbd, IRQ_KBD, mouse, IRQ_MOUSE);
#endif
        t = thread_create(i8042_kkbdpoll, NULL, TASK, 0, "kkbdpoll", true);
        if (!t)
                panic("cannot create kkbdpoll\n");
        thread_ready(t);
#endif

        sysinfo_set_item_val("ia64_iospace", NULL, true);
        sysinfo_set_item_val("ia64_iospace.address", NULL, true);
        sysinfo_set_item_val("ia64_iospace.address.virtual", NULL, IO_OFFSET);
}


/** Enter userspace and never return. */
void userspace(uspace_arg_t *kernel_uarg)
{
        psr_t psr;
        rsc_t rsc;

        psr.value = psr_read();
        psr.cpl = PL_USER;
        psr.i = true;                   /* start with interrupts enabled */
        psr.ic = true;
        psr.ri = 0;                     /* start with instruction #0 */
        psr.bn = 1;                     /* start in bank 0 */

        asm volatile ("mov %0 = ar.rsc\n" : "=r" (rsc.value));
        rsc.loadrs = 0;
        rsc.be = false;
        rsc.pl = PL_USER;
        rsc.mode = 3;                   /* eager mode */

        switch_to_userspace((uintptr_t) kernel_uarg->uspace_entry,
            ((uintptr_t) kernel_uarg->uspace_stack) + PAGE_SIZE -
            ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT),
            ((uintptr_t) kernel_uarg->uspace_stack) + PAGE_SIZE,
            (uintptr_t) kernel_uarg->uspace_uarg, psr.value, rsc.value);

        while (1)
                ;
}

/** Set thread-local-storage pointer.
 *
 * We use r13 (a.k.a. tp) for this purpose.
 */
unative_t sys_tls_set(unative_t addr)
{
        return 0;
}

/** Acquire console back for kernel
 *
 */
void arch_grab_console(void)
{
#ifdef SKI
        ski_kbd_grab();
#else
#ifdef CONFIG_NS16550
        ns16550_grab();
#else
        i8042_grab();
#endif  
#endif  
}

/** Return console to userspace
 *
 */
void arch_release_console(void)
{
#ifdef SKI
        ski_kbd_release();
#else   
#ifdef CONFIG_NS16550
        ns16550_release();
#else   
        i8042_release();
#endif  
#endif
}

void arch_reboot(void)
{
        outb(0x64, 0xfe);
        while (1)
                ;
}

/** @}
 */