OpenE2K
/
qemu-e2k
13
4
Fork 0
Code Issues 4 Pull Requests Projects 2 Releases Activity

target/hppa: Implement halt and reset instructions 

Real hardware would use an external device to control the power.
But for the moment let's invent instructions in reserved space,
to be used by our custom firmware.

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Helge Deller 2017-12-28 22:04:57 -08:00 committed by Richard Henderson
parent e216a77e3b
commit 6210db057a
3 changed files with 39 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
target/hppa/helper.h
View File

@ -80,6 +80,8 @@ DEF_HELPER_FLAGS_4(fmpynfadd_d, TCG_CALL_NO_RWG, i64, env, i64, i64, i64)
DEF_HELPER_FLAGS_0(read_interval_timer, TCG_CALL_NO_RWG, tr)
#ifndef CONFIG_USER_ONLY
DEF_HELPER_1(halt, noreturn, env)
DEF_HELPER_1(reset, noreturn, env)
DEF_HELPER_1(rfi, void, env)
DEF_HELPER_1(rfi_r, void, env)
DEF_HELPER_FLAGS_2(write_interval_timer, TCG_CALL_NO_RWG, void, env, tr)

13
target/hppa/op_helper.c
View File

@ -22,6 +22,7 @@
#include "exec/exec-all.h"
#include "exec/helper-proto.h"
#include "exec/cpu_ldst.h"
#include "sysemu/sysemu.h"
#include "qemu/timer.h"
@ -639,6 +640,18 @@ void HELPER(write_interval_timer)(CPUHPPAState *env, target_ureg val)
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;

25
target/hppa/translate.c
View File

@ -2302,6 +2302,18 @@ static DisasJumpType trans_rfi(DisasContext *ctx, uint32_t insn,
/* Exit the TB to recognize new interrupts. */
return nullify_end(ctx, DISAS_NORETURN);
}
static DisasJumpType gen_hlt(DisasContext *ctx, int reset)
{
CHECK_MOST_PRIVILEGED(EXCP_PRIV_OPR);
nullify_over(ctx);
if (reset) {
gen_helper_reset(cpu_env);
} else {
gen_helper_halt(cpu_env);
}
return nullify_end(ctx, DISAS_NORETURN);
}
#endif /* !CONFIG_USER_ONLY */
static const DisasInsn table_system[] = {
@ -4519,7 +4531,18 @@ static DisasJumpType translate_one(DisasContext *ctx, uint32_t insn)
case 0x15: /* unassigned */
case 0x1D: /* unassigned */
case 0x37: /* unassigned */
case 0x3F: /* unassigned */
break;
case 0x3F:
#ifndef CONFIG_USER_ONLY
/* Unassigned, but use as system-halt. */
if (insn == 0xfffdead0) {
return gen_hlt(ctx, 0); /* halt system */
}
if (insn == 0xfffdead1) {
return gen_hlt(ctx, 1); /* reset system */
}
#endif
break;
default:
break;
}