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/*
* x86_64 cpu related code
*
* Copyright (c) 2013 Stacey Son <sson@FreeBSD.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <sys/types.h>
#include "qemu/osdep.h"
#include "cpu.h"
#include "qemu.h"
#include "qemu/timer.h"
#include "target_arch.h"
static uint64_t *idt_table;
uint64_t cpu_get_tsc(CPUX86State *env)
{
return cpu_get_host_ticks();
}
void bsd_x86_64_write_dt(void *ptr, unsigned long addr,
unsigned long limit, int flags)
{
unsigned int e1, e2;
uint32_t *p;
e1 = (addr << 16) | (limit & 0xffff);
e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
e2 |= flags;
p = ptr;
p[0] = tswap32(e1);
p[1] = tswap32(e2);
}
static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
uint64_t addr, unsigned int sel)
{
uint32_t *p, e1, e2;
e1 = (addr & 0xffff) | (sel << 16);
e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
p = ptr;
p[0] = tswap32(e1);
p[1] = tswap32(e2);
p[2] = tswap32(addr >> 32);
p[3] = 0;
}
/* only dpl matters as we do only user space emulation */
void bsd_x86_64_set_idt(int n, unsigned int dpl)
{
set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
}
void bsd_x86_64_set_idt_base(uint64_t base)
{
idt_table = g2h_untagged(base);
}
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