From: Helge Deller <deller@gmx.de>
The physical hardware allows DIMMs of 4 MB size and above, allowing up
to 3840 MB of memory, but is restricted by setup code to 3 GB.
Increase the limit to allow up to the maximum amount of memory.
Btw. the memory area from 0xf000.0000 to 0xffff.ffff is reserved by
the architecture for firmware and I/O memory and can not be used for
standard memory.
An upcoming 64-bit SeaBIOS-hppa firmware will allow more than 3.75GB
on 64-bit HPPA64. In this case the ram_max for the pa20 case will change.
Signed-off-by: Helge Deller <deller@gmx.de>
Noticed-by: Nelson H. F. Beebe <beebe@math.utah.edu>
Fixes: b7746b1194c8 ("hw/hppa/machine: Restrict the total memory size to 3GB")
---
hw/hppa/machine.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/hw/hppa/machine.c b/hw/hppa/machine.c
index c8da7c18d5..b11907617e 100644
--- a/hw/hppa/machine.c
+++ b/hw/hppa/machine.c
@@ -276,6 +276,7 @@ static TranslateFn *machine_HP_common_init_cpus(MachineState *machine)
unsigned int smp_cpus = machine->smp.cpus;
TranslateFn *translate;
MemoryRegion *cpu_region;
+ uint64_t ram_max;
/* Create CPUs. */
for (unsigned int i = 0; i < smp_cpus; i++) {
@@ -288,8 +289,10 @@ static TranslateFn *machine_HP_common_init_cpus(MachineState *machine)
*/
if (hppa_is_pa20(&cpu[0]->env)) {
translate = translate_pa20;
+ ram_max = 0xf0000000; /* 3.75 GB (limited by 32-bit firmware) */
} else {
translate = translate_pa10;
+ ram_max = 0xf0000000; /* 3.75 GB (32-bit CPU) */
}
for (unsigned int i = 0; i < smp_cpus; i++) {
@@ -311,9 +314,9 @@ static TranslateFn *machine_HP_common_init_cpus(MachineState *machine)
cpu_region);
/* Main memory region. */
- if (machine->ram_size > 3 * GiB) {
- error_report("RAM size is currently restricted to 3GB");
- exit(EXIT_FAILURE);
+ if (machine->ram_size > ram_max) {
+ 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);
--
2.43.0