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[PATCH REPOST v3 41/80] hw/hppa/machine: Map the PDC memory region with
From: |
Igor Mammedov |
Subject: |
[PATCH REPOST v3 41/80] hw/hppa/machine: Map the PDC memory region with higher priority |
Date: |
Thu, 23 Jan 2020 12:38:06 +0100 |
From: Philippe Mathieu-Daudé <address@hidden>
The region in range [0xf0000000 - 0xf1000000] is the PDC area
(Processor Dependent Code), where the firmware is loaded.
This region has higher priority than the main memory.
When the machine has more than 3840MB of RAM, there is an
overlap. Since the PDC is closer to the CPU in the bus
hierarchy, it gets accessed first, and the CPU does not have
access to the RAM in this range.
To model the same behavior and keep a simple memory layout,
reduce the priority of the RAM region. The PDC region ends
overlapping the RAM.
Signed-off-by: Philippe Mathieu-Daudé <address@hidden>
Reviewed-by: Richard Henderson <address@hidden>
Acked-by: Helge Deller <address@hidden>
Signed-off-by: Igor Mammedov <address@hidden>
---
hw/hppa/machine.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/hppa/machine.c b/hw/hppa/machine.c
index 119ae4d..810e671 100644
--- a/hw/hppa/machine.c
+++ b/hw/hppa/machine.c
@@ -98,7 +98,7 @@ static void machine_hppa_init(MachineState *machine)
ram_region = g_new(MemoryRegion, 1);
memory_region_allocate_system_memory(ram_region, OBJECT(machine),
"ram", ram_size);
- memory_region_add_subregion(addr_space, 0, ram_region);
+ memory_region_add_subregion_overlap(addr_space, 0, ram_region, -1);
/* Init Dino (PCI host bus chip). */
pci_bus = dino_init(addr_space, &rtc_irq, &serial_irq);
--
2.7.4
- [PATCH REPOST v3 30/80] arm/vexpress: use memdev for RAM, (continued)
- [PATCH REPOST v3 30/80] arm/vexpress: use memdev for RAM, Igor Mammedov, 2020/01/23
- [PATCH REPOST v3 28/80] arm/sbsa-ref: use memdev for RAM, Igor Mammedov, 2020/01/23
- [PATCH REPOST v3 34/80] arm/xlnx-versal-virt: use memdev for RAM, Igor Mammedov, 2020/01/23
- [PATCH REPOST v3 32/80] arm/xilinx_zynq: drop RAM size fixup, Igor Mammedov, 2020/01/23
- [PATCH REPOST v3 31/80] arm/virt: use memdev for RAM, Igor Mammedov, 2020/01/23
- [PATCH REPOST v3 35/80] arm/xlnx-zcu102: use memdev for RAM, Igor Mammedov, 2020/01/23
- [PATCH REPOST v3 33/80] arm/xilinx_zynq: use memdev for RAM, Igor Mammedov, 2020/01/23
- [PATCH REPOST v3 37/80] null-machine: use memdev for RAM, Igor Mammedov, 2020/01/23
- [PATCH REPOST v3 40/80] hw/hppa/machine: Restrict the total memory size to 3GB, Igor Mammedov, 2020/01/23
- [PATCH REPOST v3 41/80] hw/hppa/machine: Map the PDC memory region with higher priority,
Igor Mammedov <=
- [PATCH REPOST v3 36/80] s390x/s390-virtio-ccw: use memdev for RAM, Igor Mammedov, 2020/01/23
- [PATCH REPOST v3 38/80] cris/axis_dev88: use memdev for RAM, Igor Mammedov, 2020/01/23
- [PATCH REPOST v3 39/80] hw/hppa/machine: Correctly check the firmware is in PDC range, Igor Mammedov, 2020/01/23
- [PATCH REPOST v3 42/80] hppa: use memdev for RAM, Igor Mammedov, 2020/01/23
- [PATCH REPOST v3 43/80] x86/microvm: use memdev for RAM, Igor Mammedov, 2020/01/23
- [PATCH REPOST v3 44/80] x86/pc: use memdev for RAM, Igor Mammedov, 2020/01/23
- [PATCH REPOST v3 47/80] m68k/an5206: use memdev for RAM, Igor Mammedov, 2020/01/23
- [PATCH REPOST v3 46/80] lm32/milkymist: use memdev for RAM, Igor Mammedov, 2020/01/23
- [PATCH REPOST v3 45/80] lm32/lm32_boards: use memdev for RAM, Igor Mammedov, 2020/01/23