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hw/hppa: Support up to 256 GiB RAM on 64-bit machines

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Allow up to 256 GB RAM, which is the maximum a rp8440 machine (the very
last 64-bit PA-RISC machine) physically supports.

Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Helge Deller 2025-01-22 15:00:53 +01:00
parent 32a97c5d05
commit d0ad4118ab
2 changed files with 21 additions and 7 deletions
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26
hw/hppa/machine.c
View file

@ -283,16 +283,13 @@ static TranslateFn *machine_HP_common_init_cpus(MachineState *machine)
cpu[i] = HPPA_CPU(cpu_create(machine->cpu_type));
}
/*
* For now, treat address layout as if PSW_W is clear.
* TODO: create a proper hppa64 board model and load elf64 firmware.
*/
/* Initialize memory */
if (hppa_is_pa20(&cpu[0]->env)) {
translate = translate_pa20;
ram_max = 0xf0000000; /* 3.75 GB (limited by 32-bit firmware) */
ram_max = 256 * GiB; /* like HP rp8440 */
} else {
translate = translate_pa10;
ram_max = 0xf0000000; /* 3.75 GB (32-bit CPU) */
ram_max = FIRMWARE_START; /* 3.75 GB (32-bit CPU) */
}
soft_power_reg = translate(NULL, HPA_POWER_BUTTON);
@ -320,7 +317,22 @@ static TranslateFn *machine_HP_common_init_cpus(MachineState *machine)
info_report("Max RAM size limited to %" PRIu64 " MB", ram_max / MiB);
machine->ram_size = ram_max;
}
memory_region_add_subregion_overlap(addr_space, 0, machine->ram, -1);
if (machine->ram_size <= FIRMWARE_START) {
/* contiguous memory up to 3.75 GB RAM */
memory_region_add_subregion_overlap(addr_space, 0, machine->ram, -1);
} else {
/* non-contiguous: Memory above 3.75 GB is mapped at RAM_MAP_HIGH */
MemoryRegion *mem_region;
mem_region = g_new(MemoryRegion, 2);
memory_region_init_alias(&mem_region[0], &addr_space->parent_obj,
"LowMem", machine->ram, 0, FIRMWARE_START);
memory_region_init_alias(&mem_region[1], &addr_space->parent_obj,
"HighMem", machine->ram, FIRMWARE_START,
machine->ram_size - FIRMWARE_START);
memory_region_add_subregion_overlap(addr_space, 0, &mem_region[0], -1);
memory_region_add_subregion_overlap(addr_space, RAM_MAP_HIGH,
&mem_region[1], -1);
}
return translate;
}