[PATCH v3 uq/master 09/22] target-sh4: move intr_at_halt out of cpu_halted()

From: Paolo Bonzini <pbonzini@redhat.com>
To: qemu-devel@nongnu.org
Cc: kvm@vger.kernel.org, aurelien@aurel32.net, blauwirbel@gmail.com,
	jan.kiszka@siemes.com, mtosatti@redhat.com
Subject: [PATCH v3 uq/master 09/22] target-sh4: move intr_at_halt out of cpu_halted()
Date: Mon, 28 Feb 2011 10:10:11 +0100	[thread overview]
Message-ID: <1298884224-19734-10-git-send-email-pbonzini@redhat.com> (raw)
In-Reply-To: <1298884224-19734-1-git-send-email-pbonzini@redhat.com>

From: Aurelien Jarno <aurelien@aurel32.net>

All targets except SH4 have the same cpu_halted() routine, and it has
only one caller. It is therefore a good candidate for inlining.

The difference is the handling of the intr_at_halt, which is necessary
to ignore SR.BL when sleeping. Move intr_at_halt handling out of it, by
setting this variable while executing the sleep instruction, and
clearing it when the CPU has been woken-up by an interrupt, whatever the
state of SR.BL. Also rename this variable in_sleep.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
---
 target-sh4/cpu.h       |    2 +-
 target-sh4/exec.h      |    1 -
 target-sh4/helper.c    |    4 ++--
 target-sh4/op_helper.c |    1 +
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/target-sh4/cpu.h b/target-sh4/cpu.h
index 789d188..74ff97a 100644
--- a/target-sh4/cpu.h
+++ b/target-sh4/cpu.h
@@ -184,7 +184,7 @@ typedef struct CPUSH4State {
     uint32_t cvr;		/* Cache Version Register */
 
     void *intc_handle;
-    int intr_at_halt;		/* SR_BL ignored during sleep */
+    int in_sleep;		/* SR_BL ignored during sleep */
     memory_content *movcal_backup;
     memory_content **movcal_backup_tail;
 } CPUSH4State;
diff --git a/target-sh4/exec.h b/target-sh4/exec.h
index 2999c02..61bc121 100644
--- a/target-sh4/exec.h
+++ b/target-sh4/exec.h
@@ -37,7 +37,6 @@ static inline int cpu_halted(CPUState *env) {
         return 0;
     if (cpu_has_work(env)) {
         env->halted = 0;
-        env->intr_at_halt = 1;
         return 0;
     }
     return EXCP_HALTED;
diff --git a/target-sh4/helper.c b/target-sh4/helper.c
index d2038bd..8f36d31 100644
--- a/target-sh4/helper.c
+++ b/target-sh4/helper.c
@@ -90,11 +90,11 @@ void do_interrupt(CPUState * env)
         if (do_exp && env->exception_index != 0x1e0) {
             env->exception_index = 0x000; /* masked exception -> reset */
         }
-        if (do_irq && !env->intr_at_halt) {
+        if (do_irq && !env->in_sleep) {
             return; /* masked */
         }
-        env->intr_at_halt = 0;
     }
+    env->in_sleep = 0;
 
     if (do_irq) {
         irq_vector = sh_intc_get_pending_vector(env->intc_handle,
diff --git a/target-sh4/op_helper.c b/target-sh4/op_helper.c
index 30f9842..b8f4ca2 100644
--- a/target-sh4/op_helper.c
+++ b/target-sh4/op_helper.c
@@ -119,6 +119,7 @@ void helper_debug(void)
 void helper_sleep(uint32_t next_pc)
 {
     env->halted = 1;
+    env->in_sleep = 1;
     env->exception_index = EXCP_HLT;
     env->pc = next_pc;
     cpu_loop_exit();
-- 
1.7.4


