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hw/loongarch/virt: Remove unused ISA Bus

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The LoongArch 'virt' machine doesn't use its ISA I/O region.

If a ISA device were to be mapped there, there is no support
for ISA IRQ. Unlikely useful. Simply remove.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20231010135342.40219-3-philmd@linaro.org>
Signed-off-by: Song Gao <gaosong@loongson.cn>
This commit is contained in:
Philippe Mathieu-Daudé 2023-10-10 15:53:42 +02:00 • committed by Song Gao
parent cb041aed1b
commit 3866e2f98e
3 changed files with 0 additions and 9 deletions
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1
hw/loongarch/Kconfig
View file

@ -5,7 +5,6 @@ config LOONGARCH_VIRT
imply VIRTIO_VGA imply VIRTIO_VGA
imply PCI_DEVICES imply PCI_DEVICES
imply NVDIMM imply NVDIMM
select ISA_BUS
select SERIAL select SERIAL
select VIRTIO_PCI select VIRTIO_PCI
select PLATFORM_BUS select PLATFORM_BUS

5
hw/loongarch/virt.c
View file

@ -878,11 +878,6 @@ static void loongarch_init(MachineState *machine)
machine_memory_devices_init(machine, device_mem_base, device_mem_size); machine_memory_devices_init(machine, device_mem_base, device_mem_size);
} }
/* Add isa io region */
memory_region_init_alias(&lams->isa_io, NULL, "isa-io",
get_system_io(), 0, VIRT_ISA_IO_SIZE);
memory_region_add_subregion(address_space_mem, VIRT_ISA_IO_BASE,
&lams->isa_io);
/* load the BIOS image. */ /* load the BIOS image. */
loongarch_firmware_init(lams); loongarch_firmware_init(lams);

3
include/hw/loongarch/virt.h
View file

@ -16,8 +16,6 @@
#define LOONGARCH_MAX_CPUS 256 #define LOONGARCH_MAX_CPUS 256
#define VIRT_ISA_IO_BASE 0x18000000UL
#define VIRT_ISA_IO_SIZE 0x0004000
#define VIRT_FWCFG_BASE 0x1e020000UL #define VIRT_FWCFG_BASE 0x1e020000UL
#define VIRT_BIOS_BASE 0x1c000000UL #define VIRT_BIOS_BASE 0x1c000000UL
#define VIRT_BIOS_SIZE (4 * MiB) #define VIRT_BIOS_SIZE (4 * MiB)
@ -38,7 +36,6 @@ struct LoongArchMachineState {
MemoryRegion lowmem; MemoryRegion lowmem;
MemoryRegion highmem; MemoryRegion highmem;
MemoryRegion isa_io;
MemoryRegion bios; MemoryRegion bios;
bool bios_loaded; bool bios_loaded;
/* State for other subsystems/APIs: */ /* State for other subsystems/APIs: */