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hw/alpha: Provide a PCI-ISA bridge device node

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- Move initialization of the ISA bus from typhoon_init() to clipper_init();
  this apsect of device topology is really associated with the individual
  model, not the core logic chipset.  typhoon_init() now returns the IRQ
  to use for the output of the ISA PIC.

- In clipper_init(), instantiate an i82378 instance, and connect its
  PIC output to the ISA IRQ input provided by typhoon_init().  Remove
  the explicit instantiations of i8254 and i82374, as these devices
  are subsumed by the i82378.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Jason Thorpe <thorpej@me.com>
Message-Id: <20210616141538.25436-1-thorpej@me.com>
[rth: Remove direct dependencies on i82374, i8254, i8259.]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Jason Thorpe 2021-06-16 07:15:38 -07:00 • committed by Richard Henderson
parent 387a1dcb35
commit 5ec4f1d348
4 changed files with 36 additions and 27 deletions
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2
hw/alpha/alpha_sys.h
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@ -10,7 +10,7 @@
#include "hw/intc/i8259.h"
PCIBus *typhoon_init(MemoryRegion *, ISABus **, qemu_irq *, AlphaCPU *[4],
PCIBus *typhoon_init(MemoryRegion *, qemu_irq *, qemu_irq *, AlphaCPU *[4],
pci_map_irq_fn, uint8_t devfn_min);
/* alpha_pci.c. */