scsi: esp: check buffer length before reading scsi command
[qemu.git] / target-alpha / sys_helper.c
1 /*
2 * Helpers for system instructions.
3 *
4 * Copyright (c) 2007 Jocelyn Mayer
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "qemu/osdep.h"
21 #include "cpu.h"
22 #include "exec/exec-all.h"
23 #include "exec/helper-proto.h"
24 #include "sysemu/sysemu.h"
25 #include "qemu/timer.h"
26
27
28 uint64_t helper_load_pcc(CPUAlphaState *env)
29 {
30 #ifndef CONFIG_USER_ONLY
31 /* In system mode we have access to a decent high-resolution clock.
32 In order to make OS-level time accounting work with the RPCC,
33 present it with a well-timed clock fixed at 250MHz. */
34 return (((uint64_t)env->pcc_ofs << 32)
35 | (uint32_t)(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) >> 2));
36 #else
37 /* In user-mode, QEMU_CLOCK_VIRTUAL doesn't exist. Just pass through the host cpu
38 clock ticks. Also, don't bother taking PCC_OFS into account. */
39 return (uint32_t)cpu_get_host_ticks();
40 #endif
41 }
42
43 /* PALcode support special instructions */
44 #ifndef CONFIG_USER_ONLY
45 void helper_tbia(CPUAlphaState *env)
46 {
47 tlb_flush(CPU(alpha_env_get_cpu(env)), 1);
48 }
49
50 void helper_tbis(CPUAlphaState *env, uint64_t p)
51 {
52 tlb_flush_page(CPU(alpha_env_get_cpu(env)), p);
53 }
54
55 void helper_tb_flush(CPUAlphaState *env)
56 {
57 tb_flush(CPU(alpha_env_get_cpu(env)));
58 }
59
60 void helper_halt(uint64_t restart)
61 {
62 if (restart) {
63 qemu_system_reset_request();
64 } else {
65 qemu_system_shutdown_request();
66 }
67 }
68
69 uint64_t helper_get_vmtime(void)
70 {
71 return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
72 }
73
74 uint64_t helper_get_walltime(void)
75 {
76 return qemu_clock_get_ns(rtc_clock);
77 }
78
79 void helper_set_alarm(CPUAlphaState *env, uint64_t expire)
80 {
81 AlphaCPU *cpu = alpha_env_get_cpu(env);
82
83 if (expire) {
84 env->alarm_expire = expire;
85 timer_mod(cpu->alarm_timer, expire);
86 } else {
87 timer_del(cpu->alarm_timer);
88 }
89 }
90
91 #endif /* CONFIG_USER_ONLY */