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Annotation of qemu/target-alpha/sys_helper.c, revision 1.1

1.1     ! root        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 */

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