1 /* 2 * x86_64 cpu related code 3 * 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, see <http://www.gnu.org/licenses/>. 17 */ 18 19 #include <sys/types.h> 20 21 #include "qemu/osdep.h" 22 #include "cpu.h" 23 #include "qemu.h" 24 #include "qemu/timer.h" 25 26 #include "target_arch.h" 27 28 static uint64_t *idt_table; 29 30 uint64_t cpu_get_tsc(CPUX86State *env) 31 { 32 return cpu_get_host_ticks(); 33 } 34 35 int cpu_get_pic_interrupt(CPUX86State *env) 36 { 37 return -1; 38 } 39 40 void bsd_x86_64_write_dt(void *ptr, unsigned long addr, 41 unsigned long limit, int flags) 42 { 43 unsigned int e1, e2; 44 uint32_t *p; 45 e1 = (addr << 16) | (limit & 0xffff); 46 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000); 47 e2 |= flags; 48 p = ptr; 49 p[0] = tswap32(e1); 50 p[1] = tswap32(e2); 51 } 52 53 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl, 54 uint64_t addr, unsigned int sel) 55 { 56 uint32_t *p, e1, e2; 57 e1 = (addr & 0xffff) | (sel << 16); 58 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); 59 p = ptr; 60 p[0] = tswap32(e1); 61 p[1] = tswap32(e2); 62 p[2] = tswap32(addr >> 32); 63 p[3] = 0; 64 } 65 66 /* only dpl matters as we do only user space emulation */ 67 void bsd_x86_64_set_idt(int n, unsigned int dpl) 68 { 69 set_gate64(idt_table + n * 2, 0, dpl, 0, 0); 70 } 71 72 void bsd_x86_64_set_idt_base(uint64_t base) 73 { 74 idt_table = g2h_untagged(base); 75 } 76