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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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19
hw/alpha/typhoon.c
View file

@ -814,9 +814,9 @@ static void typhoon_alarm_timer(void *opaque)
cpu_interrupt(CPU(s->cchip.cpu[cpu]), CPU_INTERRUPT_TIMER);
}
PCIBus *typhoon_init(MemoryRegion *ram, ISABus **isa_bus, qemu_irq *p_rtc_irq,
AlphaCPU *cpus[4], pci_map_irq_fn sys_map_irq,
uint8_t devfn_min)
PCIBus *typhoon_init(MemoryRegion *ram, qemu_irq *p_isa_irq,
qemu_irq *p_rtc_irq, AlphaCPU *cpus[4],
pci_map_irq_fn sys_map_irq, uint8_t devfn_min)
{
MemoryRegion *addr_space = get_system_memory();
DeviceState *dev;
@ -844,6 +844,7 @@ PCIBus *typhoon_init(MemoryRegion *ram, ISABus **isa_bus, qemu_irq *p_rtc_irq,
}
}
*p_isa_irq = qemu_allocate_irq(typhoon_set_isa_irq, s, 0);
*p_rtc_irq = qemu_allocate_irq(typhoon_set_timer_irq, s, 0);
/* Main memory region, 0x00.0000.0000. Real hardware supports 32GB,
@ -919,18 +920,6 @@ PCIBus *typhoon_init(MemoryRegion *ram, ISABus **isa_bus, qemu_irq *p_rtc_irq,
/* Pchip1 PCI I/O, 0x802.FC00.0000, 32MB. */
/* Pchip1 PCI configuration, 0x802.FE00.0000, 16MB. */
/* Init the ISA bus. */
/* ??? Technically there should be a cy82c693ub pci-isa bridge. */
{
qemu_irq *isa_irqs;
*isa_bus = isa_bus_new(NULL, get_system_memory(), &s->pchip.reg_io,
&error_abort);
isa_irqs = i8259_init(*isa_bus,
qemu_allocate_irq(typhoon_set_isa_irq, s, 0));
isa_bus_irqs(*isa_bus, isa_irqs);
}
return b;
}