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[Qemu-devel] [PATCH v2 0/6] arm_boot/vexpress-a15: Support >4GB of RAM
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PATCH v2 0/6] arm_boot/vexpress-a15: Support >4GB of RAM |
Date: |
Mon, 16 Jul 2012 14:24:10 +0100 |
From: Peter Maydell <address@hidden(none)>
This patchset adds support for booting with >4GB of RAM on the
Versatile Express Cortex-A15 model. There are some caveats:
* you need an LPAE A15 kernel
* you need to be booting with device tree
* your device tree blob needs to specify #address-cells and
#size-cells as 2 (so addresses and sizes are 64 bit), which
means you'll need to tweak the stock kernel dtb
[the dtb files for the vexpress boards should be getting this change
soon, although I'm not sure when it will hit upstream]
* you need a minor kernel patch which stops the kernel throwing away
the high 32 bits of the RAM size:
http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=7465/1
[hopefully coming soon to an upstream kernel near you]
* you need a 64 bit host, obviously
Changes v1->v2:
* now based on master, no other dependencies
* use uint64_t rather than target_phys_addr_t for sizes
* removed debug tracing
* tweaked "ram size too big for ATAGS boot" message
NB that (following discussion with Peter C) the device_tree.c
patch is unchanged from v1.
Peter Maydell (6):
hw/arm_boot.c: Make ram_size a uint64_t
hw/arm_boot.c: Consistently use ram_size from arm_boot_info struct
hw/arm_boot.c: Check for RAM sizes exceeding ATAGS capacity
device_tree: Add support for reading device tree properties
hw/arm_boot.c: Support DTBs which use 64 bit addresses
hw/vexpress.c: Allow >4GB of RAM for Cortex-A15 daughterboard
device_tree.c | 30 ++++++++++++++++++++++++++++++
device_tree.h | 4 ++++
hw/arm-misc.h | 2 +-
hw/arm_boot.c | 46 +++++++++++++++++++++++++++++++++++++++++-----
hw/vexpress.c | 13 ++++++++++---
5 files changed, 86 insertions(+), 9 deletions(-)
--
1.7.5.4
- [Qemu-devel] [PATCH v2 0/6] arm_boot/vexpress-a15: Support >4GB of RAM,
Peter Maydell <=
- [Qemu-devel] [PATCH v2 6/6] hw/vexpress.c: Allow >4GB of RAM for Cortex-A15 daughterboard, Peter Maydell, 2012/07/16
- [Qemu-devel] [PATCH v2 1/6] hw/arm_boot.c: Make ram_size a uint64_t, Peter Maydell, 2012/07/16
- [Qemu-devel] [PATCH v2 4/6] device_tree: Add support for reading device tree properties, Peter Maydell, 2012/07/16
- [Qemu-devel] [PATCH v2 2/6] hw/arm_boot.c: Consistently use ram_size from arm_boot_info struct, Peter Maydell, 2012/07/16
- [Qemu-devel] [PATCH v2 3/6] hw/arm_boot.c: Check for RAM sizes exceeding ATAGS capacity, Peter Maydell, 2012/07/16
- [Qemu-devel] [PATCH v2 5/6] hw/arm_boot.c: Support DTBs which use 64 bit addresses, Peter Maydell, 2012/07/16