102 lines
3.0 KiB
C
102 lines
3.0 KiB
C
|
/*
|
||
|
|
* Helpers for HPPA system instructions.
|
||
|
|
*
|
||
|
|
* Copyright (c) 2016 Richard Henderson <rth@twiddle.net>
|
||
|
|
*
|
||
|
|
* This library is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU Lesser General Public
|
||
|
|
* License as published by the Free Software Foundation; either
|
||
|
|
* version 2.1 of the License, or (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This library is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
* Lesser General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU Lesser General Public
|
||
|
|
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "qemu/osdep.h"
|
||
|
|
#include "cpu.h"
|
||
|
|
#include "exec/exec-all.h"
|
||
|
|
#include "exec/helper-proto.h"
|
||
|
|
#include "qemu/timer.h"
|
||
|
|
#include "sysemu/runstate.h"
|
||
|
|
|
||
|
|
void HELPER(write_interval_timer)(CPUHPPAState *env, target_ureg val)
|
||
|
|
{
|
||
|
|
HPPACPU *cpu = env_archcpu(env);
|
||
|
|
uint64_t current = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
|
||
|
|
uint64_t timeout;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Even in 64-bit mode, the comparator is always 32-bit. But the
|
||
|
|
* value we expose to the guest is 1/4 of the speed of the clock,
|
||
|
|
* so moosh in 34 bits.
|
||
|
|
*/
|
||
|
|
timeout = deposit64(current, 0, 34, (uint64_t)val << 2);
|
||
|
|
|
||
|
|
/* If the mooshing puts the clock in the past, advance to next round. */
|
||
|
|
if (timeout < current + 1000) {
|
||
|
|
timeout += 1ULL << 34;
|
||
|
|
}
|
||
|
|
|
||
|
|
cpu->env.cr[CR_IT] = timeout;
|
||
|
|
timer_mod(cpu->alarm_timer, timeout);
|
||
|
|
}
|
||
|
|
|
||
|
|
void HELPER(halt)(CPUHPPAState *env)
|
||
|
|
{
|
||
|
|
qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
|
||
|
|
helper_excp(env, EXCP_HLT);
|
||
|
|
}
|
||
|
|
|
||
|
|
void HELPER(reset)(CPUHPPAState *env)
|
||
|
|
{
|
||
|
|
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
|
||
|
|
helper_excp(env, EXCP_HLT);
|
||
|
|
}
|
||
|
|
|
||
|
|
target_ureg HELPER(swap_system_mask)(CPUHPPAState *env, target_ureg nsm)
|
||
|
|
{
|
||
|
|
target_ulong psw = env->psw;
|
||
|
|
/*
|
||
|
|
* Setting the PSW Q bit to 1, if it was not already 1, is an
|
||
|
|
* undefined operation.
|
||
|
|
*
|
||
|
|
* However, HP-UX 10.20 does this with the SSM instruction.
|
||
|
|
* Tested this on HP9000/712 and HP9000/785/C3750 and both
|
||
|
|
* machines set the Q bit from 0 to 1 without an exception,
|
||
|
|
* so let this go without comment.
|
||
|
|
*/
|
||
|
|
env->psw = (psw & ~PSW_SM) | (nsm & PSW_SM);
|
||
|
|
return psw & PSW_SM;
|
||
|
|
}
|
||
|
|
|
||
|
|
void HELPER(rfi)(CPUHPPAState *env)
|
||
|
|
{
|
||
|
|
env->iasq_f = (uint64_t)env->cr[CR_IIASQ] << 32;
|
||
|
|
env->iasq_b = (uint64_t)env->cr_back[0] << 32;
|
||
|
|
env->iaoq_f = env->cr[CR_IIAOQ];
|
||
|
|
env->iaoq_b = env->cr_back[1];
|
||
|
|
cpu_hppa_put_psw(env, env->cr[CR_IPSW]);
|
||
|
|
}
|
||
|
|
|
||
|
|
void HELPER(getshadowregs)(CPUHPPAState *env)
|
||
|
|
{
|
||
|
|
env->gr[1] = env->shadow[0];
|
||
|
|
env->gr[8] = env->shadow[1];
|
||
|
|
env->gr[9] = env->shadow[2];
|
||
|
|
env->gr[16] = env->shadow[3];
|
||
|
|
env->gr[17] = env->shadow[4];
|
||
|
|
env->gr[24] = env->shadow[5];
|
||
|
|
env->gr[25] = env->shadow[6];
|
||
|
|
}
|
||
|
|
|
||
|
|
void HELPER(rfi_r)(CPUHPPAState *env)
|
||
|
|
{
|
||
|
|
helper_getshadowregs(env);
|
||
|
|
helper_rfi(env);
|
||
|
|
}
|