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Re: [Qemu-devel] [PATCH 13/19] nvic: Implement v8M changes to fixed prio
From: |
Richard Henderson |
Subject: |
Re: [Qemu-devel] [PATCH 13/19] nvic: Implement v8M changes to fixed priority exceptions |
Date: |
Tue, 19 Sep 2017 13:54:49 -0500 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 |
On 09/12/2017 01:14 PM, Peter Maydell wrote:
> In v7M, the fixed-priority exceptions are:
> Reset: -3
> NMI: -2
> HardFault: -1
>
> In v8M, this changes because Secure HardFault may need
> to be prioritised above NMI:
> Reset: -4
> Secure HardFault if AIRCR.BFHFNMINS == 1: -3
> NMI: -2
> Secure HardFault if AIRCR.BFHFNMINS == 0: -1
> NonSecure HardFault: -1
>
> Make these changes, including support for changing the
> priority of Secure HardFault as AIRCR.BFHFNMINS changes.
>
> Signed-off-by: Peter Maydell <address@hidden>
> ---
> hw/intc/armv7m_nvic.c | 22 +++++++++++++++++++---
> 1 file changed, 19 insertions(+), 3 deletions(-)
Reviewed-by: Richard Henderson <address@hidden>
r~
- Re: [Qemu-devel] [PATCH 01/19] target/arm: Implement MSR/MRS access to NS banked registers, (continued)
- [Qemu-devel] [PATCH 07/19] nvic: Implement NVIC_ITNS<n> registers, Peter Maydell, 2017/09/12
- [Qemu-devel] [PATCH 12/19] nvic: In escalation to HardFault, support HF not being priority -1, Peter Maydell, 2017/09/12
- [Qemu-devel] [PATCH 14/19] nvic: Disable the non-secure HardFault if AIRCR.BFHFNMINS is clear, Peter Maydell, 2017/09/12
- [Qemu-devel] [PATCH 10/19] nvic: Make SHPR registers banked, Peter Maydell, 2017/09/12
- [Qemu-devel] [PATCH 13/19] nvic: Implement v8M changes to fixed priority exceptions, Peter Maydell, 2017/09/12
- Re: [Qemu-devel] [PATCH 13/19] nvic: Implement v8M changes to fixed priority exceptions,
Richard Henderson <=
- [Qemu-devel] [PATCH 19/19] nvic: Support banked exceptions in acknowledge and complete, Peter Maydell, 2017/09/12
- [Qemu-devel] [PATCH 18/19] nvic: Make SHCSR banked for v8M, Peter Maydell, 2017/09/12
- Re: [Qemu-devel] [PATCH 00/19] ARMv8M: support security extn in the NVIC, no-reply, 2017/09/19
- Re: [Qemu-devel] [PATCH 00/19] ARMv8M: support security extn in the NVIC, no-reply, 2017/09/19