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- /*
- * i386 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 "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_i386_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_gate(void *ptr, unsigned int type, unsigned int dpl,
- uint32_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);
- }
- /* only dpl matters as we do only user space emulation */
- void bsd_i386_set_idt(int n, unsigned int dpl)
- {
- set_gate(idt_table + n, 0, dpl, 0, 0);
- }
- void bsd_i386_set_idt_base(uint64_t base)
- {
- idt_table = g2h_untagged(base);
- }
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