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[Qemu-devel] [PULL v4 27/43] target/hppa: Implement halt and reset instr
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PULL v4 27/43] target/hppa: Implement halt and reset instructions |
Date: |
Sun, 28 Jan 2018 15:15:12 -0800 |
From: Helge Deller <address@hidden>
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 <address@hidden>
Signed-off-by: Richard Henderson <address@hidden>
---
target/hppa/helper.h | 2 ++
target/hppa/op_helper.c | 13 +++++++++++++
target/hppa/translate.c | 25 ++++++++++++++++++++++++-
3 files changed, 39 insertions(+), 1 deletion(-)
diff --git a/target/hppa/helper.h b/target/hppa/helper.h
index 1e733b7926..31320740da 100644
--- a/target/hppa/helper.h
+++ b/target/hppa/helper.h
@@ -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(shutdown, 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)
diff --git a/target/hppa/op_helper.c b/target/hppa/op_helper.c
index ef2951386c..37160f0d91 100644
--- a/target/hppa/op_helper.c
+++ b/target/hppa/op_helper.c
@@ -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(shutdown)(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;
diff --git a/target/hppa/translate.c b/target/hppa/translate.c
index f3942b1baf..8c1ae4db78 100644
--- a/target/hppa/translate.c
+++ b/target/hppa/translate.c
@@ -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_shutdown(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;
}
--
2.14.3
- [Qemu-devel] [PULL v4 15/43] target/hppa: Avoid privilege level decrease during branches, (continued)
- [Qemu-devel] [PULL v4 15/43] target/hppa: Avoid privilege level decrease during branches, Richard Henderson, 2018/01/28
- [Qemu-devel] [PULL v4 17/43] target/hppa: Implement tlb_fill, Richard Henderson, 2018/01/28
- [Qemu-devel] [PULL v4 14/43] target/hppa: Use space registers in data operations, Richard Henderson, 2018/01/28
- [Qemu-devel] [PULL v4 19/43] target/hppa: Implement the interval timer, Richard Henderson, 2018/01/28
- [Qemu-devel] [PULL v4 20/43] target/hppa: Log unimplemented instructions, Richard Henderson, 2018/01/28
- [Qemu-devel] [PULL v4 21/43] target/hppa: Implement I*TLBA and I*TLBP insns, Richard Henderson, 2018/01/28
- [Qemu-devel] [PULL v4 26/43] target/hppa: Implement SYNCDMA insn, Richard Henderson, 2018/01/28
- [Qemu-devel] [PULL v4 22/43] target/hppa: Implement P*TLB and P*TLBE insns, Richard Henderson, 2018/01/28
- [Qemu-devel] [PULL v4 24/43] target/hppa: Implement LPA, Richard Henderson, 2018/01/28
- [Qemu-devel] [PULL v4 25/43] target/hppa: Implement LCI, Richard Henderson, 2018/01/28
- [Qemu-devel] [PULL v4 27/43] target/hppa: Implement halt and reset instructions,
Richard Henderson <=
- [Qemu-devel] [PULL v4 23/43] target/hppa: Implement LDWA, Richard Henderson, 2018/01/28
- [Qemu-devel] [PULL v4 28/43] target/hppa: Optimize for flat addressing space, Richard Henderson, 2018/01/28
- [Qemu-devel] [PULL v4 29/43] target/hppa: Add system registers to gdbstub, Richard Henderson, 2018/01/28
- [Qemu-devel] [PULL v4 32/43] target/hppa: Only use EXCP_DTLB_MISS, Richard Henderson, 2018/01/28
- [Qemu-devel] [PULL v4 33/43] target/hppa: Increase number of temp regs, Richard Henderson, 2018/01/28
- [Qemu-devel] [PULL v4 30/43] target/hppa: Add migration for the cpu, Richard Henderson, 2018/01/28
- [Qemu-devel] [PULL v4 31/43] target/hppa: Implement B,GATE insn, Richard Henderson, 2018/01/28
- [Qemu-devel] [PULL v4 35/43] target/hppa: Implement LDSID for system mode, Richard Henderson, 2018/01/28
- [Qemu-devel] [PULL v4 34/43] target/hppa: Fix comment, Richard Henderson, 2018/01/28
- [Qemu-devel] [PULL v4 36/43] target/hppa: Implement a pause instruction, Richard Henderson, 2018/01/28