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