projects / mirror_qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| 69163fbb RH |
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 "cpu.h" | |
| 21 | #include "helper.h" | |
| 22 | #include "sysemu.h" | |
| 23 | #include "qemu-timer.h" | |
| 24 | ||
| 25 | ||
| 26 | uint64_t helper_load_pcc(CPUAlphaState *env) | |
| 27 | { | |
| 28 | #ifndef CONFIG_USER_ONLY | |
| 29 | /* In system mode we have access to a decent high-resolution clock. | |
| 30 | In order to make OS-level time accounting work with the RPCC, | |
| 31 | present it with a well-timed clock fixed at 250MHz. */ | |
| 32 | return (((uint64_t)env->pcc_ofs << 32) | |
| 33 | | (uint32_t)(qemu_get_clock_ns(vm_clock) >> 2)); | |
| 34 | #else | |
| 35 | /* In user-mode, vm_clock doesn't exist. Just pass through the host cpu | |
| 36 | clock ticks. Also, don't bother taking PCC_OFS into account. */ | |
| 37 | return (uint32_t)cpu_get_real_ticks(); | |
| 38 | #endif | |
| 39 | } | |
| 40 | ||
| 41 | /* PALcode support special instructions */ | |
| 42 | #ifndef CONFIG_USER_ONLY | |
| 43 | void helper_hw_ret(CPUAlphaState *env, uint64_t a) | |
| 44 | { | |
| 45 | env->pc = a & ~3; | |
| 46 | env->intr_flag = 0; | |
| 47 | env->lock_addr = -1; | |
| 48 | if ((a & 1) == 0) { | |
| 49 | env->pal_mode = 0; | |
| 50 | swap_shadow_regs(env); | |
| 51 | } | |
| 52 | } | |
| 53 | ||
| 54 | void helper_tbia(CPUAlphaState *env) | |
| 55 | { | |
| 56 | tlb_flush(env, 1); | |
| 57 | } | |
| 58 | ||
| 59 | void helper_tbis(CPUAlphaState *env, uint64_t p) | |
| 60 | { | |
| 61 | tlb_flush_page(env, p); | |
| 62 | } | |
| 63 | ||
| 64 | void helper_halt(uint64_t restart) | |
| 65 | { | |
| 66 | if (restart) { | |
| 67 | qemu_system_reset_request(); | |
| 68 | } else { | |
| 69 | qemu_system_shutdown_request(); | |
| 70 | } | |
| 71 | } | |
| 72 | ||
| 73 | uint64_t helper_get_time(void) | |
| 74 | { | |
| 75 | return qemu_get_clock_ns(rtc_clock); | |
| 76 | } | |
| 77 | ||
| 78 | void helper_set_alarm(CPUAlphaState *env, uint64_t expire) | |
| 79 | { | |
| 80 | if (expire) { | |
| 81 | env->alarm_expire = expire; | |
| 82 | qemu_mod_timer(env->alarm_timer, expire); | |
| 83 | } else { | |
| 84 | qemu_del_timer(env->alarm_timer); | |
| 85 | } | |
| 86 | } | |
| 87 | #endif /* CONFIG_USER_ONLY */ |