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Re: [Qemu-devel] [PATCH 3/9] sparc64: use helper_wrpil to check pending
From: |
Blue Swirl |
Subject: |
Re: [Qemu-devel] [PATCH 3/9] sparc64: use helper_wrpil to check pending irq on write |
Date: |
Wed, 6 Jan 2010 15:41:58 +0000 |
On Tue, Jan 5, 2010 at 11:19 PM, Igor V. Kovalenko
<address@hidden> wrote:
> From: Igor V. Kovalenko <address@hidden>
>
> Signed-off-by: Igor V. Kovalenko <address@hidden>
> ---
> target-sparc/helper.h | 1 +
> target-sparc/op_helper.c | 14 ++++++++++++++
> target-sparc/translate.c | 5 +----
> 3 files changed, 16 insertions(+), 4 deletions(-)
>
> diff --git a/target-sparc/helper.h b/target-sparc/helper.h
> index 4002b9e..6f103e7 100644
> --- a/target-sparc/helper.h
> +++ b/target-sparc/helper.h
> @@ -5,6 +5,7 @@ DEF_HELPER_0(rett, void)
> DEF_HELPER_1(wrpsr, void, tl)
> DEF_HELPER_0(rdpsr, tl)
> #else
> +DEF_HELPER_1(wrpil, void, tl)
> DEF_HELPER_1(wrpstate, void, tl)
> DEF_HELPER_0(done, void)
> DEF_HELPER_0(retry, void)
> diff --git a/target-sparc/op_helper.c b/target-sparc/op_helper.c
> index 26092e5..a7da0e4 100644
> --- a/target-sparc/op_helper.c
> +++ b/target-sparc/op_helper.c
> @@ -3303,6 +3303,20 @@ void helper_wrpstate(target_ulong new_state)
> change_pstate(new_state & 0xf3f);
> }
>
> +void helper_wrpil(target_ulong new_pil)
> +{
> + DPRINTF_PSTATE("helper_wrpil old=%X new=%X\n",
> + env->psrpil, (uint32_t)new_pil);
> +
> + env->psrpil = new_pil;
> +
> +#if !defined(CONFIG_USER_ONLY)
> + if (env->pstate & PS_IE) {
> + cpu_check_irqs(env);
> + }
> +#endif
> +}
It's not possible to write to PIL in user mode, so the whole code
inside the function should be surrounded by #if
!defined(CONFIG_USER_ONLY)/#endif. Please use lowercase hex.
I'm wondering about using target_ulong instead of uint32_t (type of
env->psrpil). TL makes the generated code shorter, uint32_t would
decrease TCG register pressure on 32 bit hosts. This is not
performance critical, so either way should be OK.
- [Qemu-devel] [PATCH 0/9] sparc64: tick timers, Igor V. Kovalenko, 2010/01/05
- [Qemu-devel] [PATCH 1/9] sparc64: trace pstate and global register set changes, Igor V. Kovalenko, 2010/01/05
- [Qemu-devel] [PATCH 2/9] sparc64: add PSR and PIL to cpu state dump, Igor V. Kovalenko, 2010/01/05
- [Qemu-devel] [PATCH 3/9] sparc64: use helper_wrpil to check pending irq on write, Igor V. Kovalenko, 2010/01/05
- Re: [Qemu-devel] [PATCH 3/9] sparc64: use helper_wrpil to check pending irq on write,
Blue Swirl <=
- [Qemu-devel] [PATCH 4/9] sparc64: check for pending irq when pil, pstate or softint is changed, Igor V. Kovalenko, 2010/01/05
- [Qemu-devel] [PATCH 5/9] sparc64: add macros to deal with softint and timer interrupt, Igor V. Kovalenko, 2010/01/05
- [Qemu-devel] [PATCH 6/9] sparc64: clear exception_index with -1 value, Igor V. Kovalenko, 2010/01/05
[Qemu-devel] [PATCH 7/9] sparc64: move cpu_interrupts_enabled to cpu.h, Igor V. Kovalenko, 2010/01/05