aboutsummaryrefslogtreecommitdiffstats
path: root/techlibs/intel/cycloneive
diff options
context:
space:
mode:
authorMiodrag Milanović <mmicko@gmail.com>2022-07-06 10:39:48 +0200
committerGitHub <noreply@github.com>2022-07-06 10:39:48 +0200
commit0cd20693c2a6dbbe74c45ddb6c8851a25c50e0df (patch)
treeb323bb94d65d5837fc23231bc93387a02415c853 /techlibs/intel/cycloneive
parent4c5152bf2687ee31ebc572803a88689d0267f54a (diff)
parent0ca0932b5283a1bdd247a70ee179d64d425c4a44 (diff)
downloadyosys-0cd20693c2a6dbbe74c45ddb6c8851a25c50e0df.tar.gz
yosys-0cd20693c2a6dbbe74c45ddb6c8851a25c50e0df.tar.bz2
yosys-0cd20693c2a6dbbe74c45ddb6c8851a25c50e0df.zip
Merge pull request #3399 from YosysHQ/abc_cpp
Update abc and build as C++
Diffstat (limited to 'techlibs/intel/cycloneive')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.3 (git 2.25.1) at 2025-08-22 16:46:00 +0000
n121' href='#n121'>121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 
/******************************************************************************
 * arch/x86/shutdown.c
 *
 * x86-specific shutdown handling.
 */

#include <xen/config.h>
#include <xen/init.h>
#include <xen/lib.h>
#include <xen/sched.h>
#include <xen/smp.h>
#include <xen/delay.h>
#include <xen/dmi.h>
#include <xen/irq.h>
#include <xen/console.h>
#include <xen/shutdown.h>
#include <xen/acpi.h>
#include <asm/msr.h>
#include <asm/regs.h>
#include <asm/mc146818rtc.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/processor.h>
#include <asm/mpspec.h>
#include <asm/tboot.h>

enum reboot_type {
        BOOT_TRIPLE = 't',
        BOOT_KBD = 'k',
        BOOT_ACPI = 'a',
        BOOT_BIOS = 'b',
};

static long no_idt[2];
static int reboot_mode;

/*
 * reboot=b[ios] | t[riple] | k[bd] | [, [w]arm | [c]old]
 * warm   Don't set the cold reboot flag
 * cold   Set the cold reboot flag
 * bios   Reboot by jumping through the BIOS (only for X86_32)
 * triple Force a triple fault (init)
 * kbd    Use the keyboard controller. cold reset (default)
 * acpi   Use the RESET_REG in the FADT
 */
static enum reboot_type reboot_type = BOOT_ACPI;
static void __init set_reboot_type(char *str)
{
    for ( ; ; )
    {
        switch ( *str )
        {
        case 'w': /* "warm" reboot (no memory testing etc) */
            reboot_mode = 0x1234;
            break;
        case 'c': /* "cold" reboot (with memory testing etc) */
            reboot_mode = 0x0;
            break;
        case 'b':
        case 'a':
        case 'k':
        case 't':
            reboot_type = *str;
            break;
        }
        if ( (str = strchr(str, ',')) == NULL )
            break;
        str++;
    }
}
custom_param("reboot", set_reboot_type);

static inline void kb_wait(void)
{
    int i;

    for ( i = 0; i < 0x10000; i++ )
        if ( (inb_p(0x64) & 0x02) == 0 )
            break;
}

static void __attribute__((noreturn)) __machine_halt(void *unused)
{
    local_irq_disable();
    for ( ; ; )
        halt();
}

void machine_halt(void)
{
    watchdog_disable();
    console_start_sync();
    local_irq_enable();
    smp_call_function(__machine_halt, NULL, 0);
    __machine_halt(NULL);
}

#ifdef __i386__

/* The following code and data reboots the machine by switching to real
   mode and jumping to the BIOS reset entry point, as if the CPU has
   really been reset.  The previous version asked the keyboard
   controller to pulse the CPU reset line, which is more thorough, but
   doesn't work with at least one type of 486 motherboard.  It is easy
   to stop this code working; hence the copious comments. */

static unsigned long long
real_mode_gdt_entries [3] =
{
    0x0000000000000000ULL,      /* Null descriptor */
    0x00009a000000ffffULL,      /* 16-bit real-mode 64k code at 0x00000000 */
    0x000092000100ffffULL       /* 16-bit real-mode 64k data at 0x00000100 */
};

static const struct
{
    unsigned short       size __attribute__ ((packed));
    unsigned long long * base __attribute__ ((packed));
}
real_mode_gdt = { sizeof (real_mode_gdt_entries) - 1, real_mode_gdt_entries },
real_mode_idt = { 0x3ff, NULL };


/* This is 16-bit protected mode code to disable paging and the cache,
   switch to real mode and jump to the BIOS reset code.

   The instruction that switches to real mode by writing to CR0 must be
   followed immediately by a far jump instruction, which set CS to a
   valid value for real mode, and flushes the prefetch queue to avoid
   running instructions that have already been decoded in protected
   mode.

   Clears all the flags except ET, especially PG (paging), PE
   (protected-mode enable) and TS (task switch for coprocessor state
   save).  Flushes the TLB after paging has been disabled.  Sets CD and
   NW, to disable the cache on a 486, and invalidates the cache.  This
   is more like the state of a 486 after reset.  I don't know if
   something else should be done for other chips.

   More could be done here to set up the registers as if a CPU reset had
   occurred; hopefully real BIOSs don't assume much. */

static const unsigned char real_mode_switch [] =
{
    0x0f, 0x20, 0xc0,                           /*    movl  %cr0,%eax        */
    0x66, 0x83, 0xe0, 0x11,                     /*    andl  $0x00000011,%eax */
    0x66, 0x0d, 0x00, 0x00, 0x00, 0x60,         /*    orl   $0x60000000,%eax */
    0x0f, 0x22, 0xc0,                           /*    movl  %eax,%cr0        */
    0x0f, 0x22, 0xd8,                           /*    movl  %eax,%cr3        */
    0x0f, 0x20, 0xc2,                           /*    movl  %cr0,%edx        */
    0x66, 0x81, 0xe2, 0x00, 0x00, 0x00, 0x60,   /*    andl  $0x60000000,%edx */
    0x74, 0x02,                                 /*    jz    f                */
    0x0f, 0x09,                                 /*    wbinvd                 */
    0x24, 0x10,                                 /* f: andb  $0x10,al         */
    0x0f, 0x22, 0xc0                            /*    movl  %eax,%cr0        */
};
#define MAX_LENGTH 0x40
static const unsigned char jump_to_bios [] =
{
    0xea, 0xf0, 0xff, 0x00, 0xf0                /*    ljmp  $0xf000,$0xfff0  */
};

/*
 * Switch to real mode and then execute the code
 * specified by the code and length parameters.
 * We assume that length will aways be less that MAX_LENGTH!
 */
static void machine_real_restart(const unsigned char *code, unsigned length)
{
    local_irq_disable();

    /* Write zero to CMOS register number 0x0f, which the BIOS POST
       routine will recognize as telling it to do a proper reboot.  (Well
       that's what this book in front of me says -- it may only apply to
       the Phoenix BIOS though, it's not clear).  At the same time,
       disable NMIs by setting the top bit in the CMOS address register,
       as we're about to do peculiar things to the CPU. */

    spin_lock(&rtc_lock);
    CMOS_WRITE(0x00, 0x8f);
    spin_unlock(&rtc_lock);

    /* Identity-map virtual address zero. */

    map_pages_to_xen(0, 0, 1, __PAGE_HYPERVISOR|MAP_SMALL_PAGES);
    set_current(idle_vcpu[0]);
    write_ptbase(idle_vcpu[0]);

    /* For the switch to real mode, copy some code to low memory.  It has
       to be in the first 64k because it is running in 16-bit mode, and it
       has to have the same physical and virtual address, because it turns
       off paging.  Copy it near the end of the first page, out of the way
       of BIOS variables. */

    memcpy((void *)(PAGE_SIZE - sizeof(real_mode_switch) - MAX_LENGTH),
           real_mode_switch, sizeof(real_mode_switch));
    memcpy((void *)(PAGE_SIZE - MAX_LENGTH), code, length);

    /* Set up the IDT for real mode. */

    __asm__ __volatile__("lidt %0": : "m" (real_mode_idt));

    /* Set up a GDT from which we can load segment descriptors for real
       mode.  The GDT is not used in real mode; it is just needed here to
       prepare the descriptors. */

    __asm__ __volatile__("lgdt %0": : "m" (real_mode_gdt));

    /* Load the data segment registers, and thus the descriptors ready for
       real mode.  The base address of each segment is 0x100, 16 times the
       selector value being loaded here.  This is so that the segment
       registers don't have to be reloaded after switching to real mode:
       the values are consistent for real mode operation already. */

    __asm__ __volatile__ ("\tmov %0,%%ds\n"
                          "\tmov %0,%%es\n"
                          "\tmov %0,%%fs\n"
                          "\tmov %0,%%gs\n"
                          "\tmov %0,%%ss"
                          :
                          : "r" (0x0010));

    /* Jump to the 16-bit code that we copied earlier.  It disables paging
       and the cache, switches to real mode, and jumps to the BIOS reset
       entry point. */

    __asm__ __volatile__ ("ljmp $0x0008,%0"
                          :
                          : "i" ((void *)(PAGE_SIZE -
                                          sizeof(real_mode_switch) -
                                          MAX_LENGTH)));
}

static int __init set_bios_reboot(struct dmi_system_id *d)
{
    if ( reboot_type != BOOT_BIOS )
    {
        reboot_type = BOOT_BIOS;
        printk("%s series board detected. "
               "Selecting BIOS-method for reboots.\n", d->ident);
    }
    return 0;
}

static struct dmi_system_id __initdata reboot_dmi_table[] = {
    {    /* Handle problems with rebooting on Dell 1300's */
        .callback = set_bios_reboot,
        .ident = "Dell PowerEdge 1300",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
            DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1300/"),
        },
    },
    {    /* Handle problems with rebooting on Dell 300's */
        .callback = set_bios_reboot,
        .ident = "Dell PowerEdge 300",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
            DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 300/"),
        },
    },
    {    /* Handle problems with rebooting on Dell 2400's */
        .callback = set_bios_reboot,
        .ident = "Dell PowerEdge 2400",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
            DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2400"),
        },
    },
    {    /* Handle problems with rebooting on HP laptops */
        .callback = set_bios_reboot,
        .ident = "HP Compaq Laptop",
        .matches = {
            DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
            DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq"),
        },
    },
    { }
};

static int __init reboot_init(void)
{
    dmi_check_system(reboot_dmi_table);
    return 0;
}
__initcall(reboot_init);

#else /* __x86_64__ */

#define machine_real_restart(x, y)

#endif

static void __machine_restart(void *pdelay)
{
    machine_restart(*(unsigned int *)pdelay);
}

void machine_restart(unsigned int delay_millisecs)
{
    int i;

    watchdog_disable();
    console_start_sync();
    spin_debug_disable();

    local_irq_enable();

    /* Ensure we are the boot CPU. */
    if ( get_apic_id() != boot_cpu_physical_apicid )
    {
        /* Send IPI to the boot CPU (logical cpu 0). */
        on_selected_cpus(cpumask_of(0), __machine_restart,
                         &delay_millisecs, 0);
        for ( ; ; )
            halt();
    }

    smp_send_stop();

    mdelay(delay_millisecs);

    if ( tboot_in_measured_env() )
        tboot_shutdown(TB_SHUTDOWN_REBOOT);

    /* Rebooting needs to touch the page at absolute address 0. */
    *((unsigned short *)__va(0x472)) = reboot_mode;

    for ( ; ; )
    {
        switch ( reboot_type )
        {
        case BOOT_KBD:
            /* Pulse the keyboard reset line. */
            for ( i = 0; i < 100; i++ )
            {
                kb_wait();
                udelay(50);
                outb(0xfe,0x64); /* pulse reset low */
                udelay(50);
            }
            /* fall through */
        case BOOT_TRIPLE:
            asm volatile ( "lidt %0 ; int3" : "=m" (no_idt) );
            break;
        case BOOT_BIOS:
            machine_real_restart(jump_to_bios, sizeof(jump_to_bios));
            break;
        case BOOT_ACPI:
            acpi_reboot();
            break;
        }

        reboot_type = BOOT_KBD;
    }
}

/*
 * Local variables:
 * mode: C
 * c-set-style: "BSD"
 * c-basic-offset: 4
 * tab-width: 4
 * indent-tabs-mode: nil
 * End:
 */