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| author | Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> | 2023-10-04 09:38:04 +0100 |
|---|---|---|
| committer | Laurent Vivier <laurent@vivier.eu> | 2023-10-06 10:33:43 +0200 |
| commit | 7685fc2a18cad56ec67f54ff64f06d840dcb0b29 (patch) | |
| tree | 4a1280c9c69dd6b21b93afd2205dcff5cd2dc7cf | |
| parent | c698b0c8edd63f8631efd935ac75c28418ae4c7d (diff) | |
| download | focaccia-qemu-7685fc2a18cad56ec67f54ff64f06d840dcb0b29.tar.gz focaccia-qemu-7685fc2a18cad56ec67f54ff64f06d840dcb0b29.zip | |
q800: add ESCC alias at 0xc000
Tests on real Q800 hardware show that the ESCC is addressable at multiple locations within the ESCC memory region - at least 0xc000, 0xc020 (as expected by the MacOS toolbox ROM) and 0xc040. All released NetBSD kernels before 10 use the 0xc000 address which causes a fatal error when running the MacOS booter. Add a single memory region alias at 0xc000 to enable NetBSD kernels to start booting under QEMU. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-ID: <20231004083806.757242-19-mark.cave-ayland@ilande.co.uk> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
| -rw-r--r-- | hw/m68k/q800.c | 6 | ||||
| -rw-r--r-- | include/hw/m68k/q800.h | 1 |
2 files changed, 7 insertions, 0 deletions
diff --git a/hw/m68k/q800.c b/hw/m68k/q800.c index ac3115d328..27a0b3c08a 100644 --- a/hw/m68k/q800.c +++ b/hw/m68k/q800.c @@ -451,6 +451,12 @@ static void q800_machine_init(MachineState *machine) memory_region_add_subregion(&m->macio, SCC_BASE - IO_BASE, sysbus_mmio_get_region(sysbus, 0)); + /* Create alias for NetBSD */ + memory_region_init_alias(&m->escc_alias, OBJECT(machine), "escc-alias", + sysbus_mmio_get_region(sysbus, 0), 0, 0x8); + memory_region_add_subregion(&m->macio, SCC_BASE - IO_BASE - 0x20, + &m->escc_alias); + /* SCSI */ object_initialize_child(OBJECT(machine), "esp", &m->esp, diff --git a/include/hw/m68k/q800.h b/include/hw/m68k/q800.h index fbaacd88bd..348eaf4703 100644 --- a/include/hw/m68k/q800.h +++ b/include/hw/m68k/q800.h @@ -67,6 +67,7 @@ struct Q800MachineState { MemoryRegion macio; MemoryRegion macio_alias; MemoryRegion machine_id; + MemoryRegion escc_alias; }; #define TYPE_Q800_MACHINE MACHINE_TYPE_NAME("q800") |