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Re: [Qemu-devel] [PATCH 0/5] piix_pci cleanup
From: |
Blue Swirl |
Subject: |
Re: [Qemu-devel] [PATCH 0/5] piix_pci cleanup |
Date: |
Fri, 21 Aug 2009 22:59:10 +0300 |
On Fri, Aug 21, 2009 at 8:36 PM, Juan Quintela<address@hidden> wrote:
> Hi
>
> This series:
> - split piix4 from piix_pci. The only shared code where piix_save/load, i.e.
> almost nothing. Once there, compile piix4.o only for mips (it was not used
> anywhere else).
> - Move global variables to PCII440FXState. Nice and clean until....
> - pci_irq_levels: This is great:
> * it is saved/loaded from i440fx
> * it is cleaned during reset in piix3
> * it is used in piix3_set_irq, that don't receive neither i440fx nor
> piix state, it needs to be a global variable. (created a global link
> until a better solution appear).
>
> I looked where to "hide" pci_irq_levels and piix3_dev (both needed in
> piix3_set_irq), and didn't found where to pass them, out of:
> - hack i8259 to hide it into PicState2 (that one got passed through the pic)
> ugly for words, but will work
> - try to add <something> at setup_irq time, but at that point we have:
> * opaque -> pci_dev of device that we are working with
> * from there we can get to the bus that the device is attached to,
> but no way to go from there to the Host bridge (that is what we wanted
> in the 1st place)
>
> Notice that this is needed for both pc and mips_malta.c
>
> Ideas on where to hide a pci_dev inside a bus?
pci_set_irq_fn should take an opaque state pointer (given at
pci_register_bus time):
typedef void (*pci_set_irq_fn)(void *opaque, qemu_irq *pic, int
irq_num, int level);
PCIBus *pci_register_bus(DeviceState *parent, const char *name,
pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
qemu_irq *pic, void *irq_opaque, int
devfn_min, int nirq);
- [Qemu-devel] [PATCH 0/5] piix_pci cleanup, Juan Quintela, 2009/08/21
- [Qemu-devel] [PATCH 1/5] piix4 don't use pci_irq_levels at all, Juan Quintela, 2009/08/21
- [Qemu-devel] [PATCH 3/5] Use PCII440FXState instead of generic PCIDevice, Juan Quintela, 2009/08/21
- [Qemu-devel] [PATCH 2/5] Split piix4 support from piix_pci.c, Juan Quintela, 2009/08/21
- [Qemu-devel] [PATCH 4/5] Move smm_enabled and isa_memory_mappings to PCII440FXState, Juan Quintela, 2009/08/21
- [Qemu-devel] [PATCH 5/5] Cleanup of pci_irq_levels belong to i440fx, Juan Quintela, 2009/08/21
- Re: [Qemu-devel] [PATCH 0/5] piix_pci cleanup,
Blue Swirl <=