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Re: [Qemu-devel] [Android-virt] [PATCH 03/12] hw/arm_boot.c: Make SMP bo
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From: |
Alexander Graf |
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Subject: |
Re: [Qemu-devel] [Android-virt] [PATCH 03/12] hw/arm_boot.c: Make SMP boards specify address to poll in bootup loop |
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Date: |
Mon, 16 Jan 2012 02:56:23 +0100 |
On 13.01.2012, at 21:52, Peter Maydell wrote:
> From: Evgeny Voevodin <address@hidden>
>
> The secondary CPU bootloader in arm_boot.c holds secondary CPUs in a
> pen until the primary CPU releases them. Make boards specify the
> address to be polled to determine whether to leave the pen (it was
> previously hardcoded to 0x10000030, which is a Versatile Express/
> Realview specific system register address).
Is smp_boot implementing the same logic as hw/ppce500_spin.c? It looks like the
normal u-boot way of waiting for a magic address to be written with boot info.
What I don't understand is the WFI. How can you wait for an interrupt if the
trigger is a memory write? Or are you actually getting IPIs?
Alex
- [Qemu-devel] [PATCH 00/12] Add support for Cortex-A15 and vexpress-a15, Peter Maydell, 2012/01/13
- [Qemu-devel] [PATCH 09/12] Add dummy implementation of generic timer cp15 registers, Peter Maydell, 2012/01/13
- [Qemu-devel] [PATCH 10/12] Add Cortex-A15 CPU definition, Peter Maydell, 2012/01/13
- [Qemu-devel] [PATCH 04/12] hw/vexpress.c: Make motherboard peripheral memory map table-driven, Peter Maydell, 2012/01/13
- [Qemu-devel] [PATCH 02/12] arm: make the number of GIC interrupts configurable, Peter Maydell, 2012/01/13
- [Qemu-devel] [PATCH 06/12] hw/vexpress.c: Factor out daughterboard-specific initialization, Peter Maydell, 2012/01/13
- [Qemu-devel] [PATCH 03/12] hw/arm_boot.c: Make SMP boards specify address to poll in bootup loop, Peter Maydell, 2012/01/13
- Re: [Qemu-devel] [Android-virt] [PATCH 03/12] hw/arm_boot.c: Make SMP boards specify address to poll in bootup loop,
Alexander Graf <=
- Re: [Qemu-devel] [PATCH 03/12] hw/arm_boot.c: Make SMP boards specify address to poll in bootup loop, andrzej zaborowski, 2012/01/16
[Qemu-devel] [PATCH 08/12] hw/a15mpcore.c: Add Cortex-A15 private peripheral model, Peter Maydell, 2012/01/13
[Qemu-devel] [PATCH 01/12] vexpress, realview: Add (dummy) L2 cache controller, Peter Maydell, 2012/01/13
[Qemu-devel] [PATCH 07/12] hw/vexpress.c: Instantiate the motherboard CLCD, Peter Maydell, 2012/01/13
[Qemu-devel] [PATCH 12/12] hw/vexpress.c: Add vexpress-a15 machine, Peter Maydell, 2012/01/13
[Qemu-devel] [PATCH 05/12] hw/vexpress.c: Move secondary CPU boot code to SRAM, Peter Maydell, 2012/01/13
[Qemu-devel] [PATCH 11/12] arm_boot: Pass base address of GIC CPU interface, not whole GIC, Peter Maydell, 2012/01/13