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/runstate.h" |
25 | #include "sysemu/sysemu.h" |
26 | #include "qemu/timer.h" |
27 | |
28 | |
29 | uint64_t helper_load_pcc(CPUAlphaState *env) |
30 | { |
31 | #ifndef CONFIG_USER_ONLY |
32 | /* In system mode we have access to a decent high-resolution clock. |
33 | In order to make OS-level time accounting work with the RPCC, |
34 | present it with a well-timed clock fixed at 250MHz. */ |
35 | return (((uint64_t)env->pcc_ofs << 32) |
36 | | (uint32_t)(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) >> 2)); |
37 | #else |
38 | /* In user-mode, QEMU_CLOCK_VIRTUAL doesn't exist. Just pass through the host cpu |
39 | clock ticks. Also, don't bother taking PCC_OFS into account. */ |
40 | return (uint32_t)cpu_get_host_ticks(); |
41 | #endif |
42 | } |
43 | |
44 | /* PALcode support special instructions */ |
45 | #ifndef CONFIG_USER_ONLY |
46 | void helper_tbia(CPUAlphaState *env) |
47 | { |
48 | tlb_flush(env_cpu(env)); |
49 | } |
50 | |
51 | void helper_tbis(CPUAlphaState *env, uint64_t p) |
52 | { |
53 | tlb_flush_page(env_cpu(env), p); |
54 | } |
55 | |
56 | void helper_tb_flush(CPUAlphaState *env) |
57 | { |
58 | tb_flush(env_cpu(env)); |
59 | } |
60 | |
61 | void helper_halt(uint64_t restart) |
62 | { |
63 | if (restart) { |
64 | qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
65 | } else { |
66 | qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); |
67 | } |
68 | } |
69 | |
70 | uint64_t helper_get_vmtime(void) |
71 | { |
72 | return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
73 | } |
74 | |
75 | uint64_t helper_get_walltime(void) |
76 | { |
77 | return qemu_clock_get_ns(rtc_clock); |
78 | } |
79 | |
80 | void helper_set_alarm(CPUAlphaState *env, uint64_t expire) |
81 | { |
82 | AlphaCPU *cpu = env_archcpu(env); |
83 | |
84 | if (expire) { |
85 | env->alarm_expire = expire; |
86 | timer_mod(cpu->alarm_timer, expire); |
87 | } else { |
88 | timer_del(cpu->alarm_timer); |
89 | } |
90 | } |
91 | |
92 | #endif /* CONFIG_USER_ONLY */ |
93 | |