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[Qemu-devel] [PATCH 6/8] arm/boot: Allow boards to modify the FDT blob
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PATCH 6/8] arm/boot: Allow boards to modify the FDT blob |
Date: |
Thu, 27 Jun 2013 14:04:13 +0100 |
Add a callback hook in arm_boot_info to allow board models to
modify the device tree blob if they need to. (The major expected
use case is to add virtio-mmio nodes for virtio-mmio transports
that exist in QEMU but not in the hardware.)
Signed-off-by: Peter Maydell <address@hidden>
---
hw/arm/boot.c | 5 +++++
include/hw/arm/arm.h | 4 ++++
2 files changed, 9 insertions(+)
diff --git a/hw/arm/boot.c b/hw/arm/boot.c
index eb9a864..77d548c 100644
--- a/hw/arm/boot.c
+++ b/hw/arm/boot.c
@@ -293,6 +293,11 @@ static int load_dtb(hwaddr addr, const struct
arm_boot_info *binfo)
goto fail;
}
}
+
+ if (binfo->modify_dtb) {
+ binfo->modify_dtb(binfo, fdt);
+ }
+
qemu_devtree_dumpdtb(fdt, size);
cpu_physical_memory_write(addr, fdt, size);
diff --git a/include/hw/arm/arm.h b/include/hw/arm/arm.h
index 7b2b02d..bae87c6 100644
--- a/include/hw/arm/arm.h
+++ b/include/hw/arm/arm.h
@@ -55,6 +55,10 @@ struct arm_boot_info {
const struct arm_boot_info *info);
void (*secondary_cpu_reset_hook)(ARMCPU *cpu,
const struct arm_boot_info *info);
+ /* if a board needs to be able to modify a device tree provided by
+ * the user it should implement this hook.
+ */
+ void (*modify_dtb)(const struct arm_boot_info *info, void *fdt);
/* Used internally by arm_boot.c */
int is_linux;
hwaddr initrd_start;
--
1.7.9.5
- [Qemu-devel] [PATCH 0/8] Add virtio-mmio and use it in vexpress, Peter Maydell, 2013/06/27
- [Qemu-devel] [PATCH 6/8] arm/boot: Allow boards to modify the FDT blob,
Peter Maydell <=
- [Qemu-devel] [PATCH 3/8] virtio: Add support for guest setting of queue size, Peter Maydell, 2013/06/27
- [Qemu-devel] [PATCH 5/8] virtio: Implement MMIO based virtio transport, Peter Maydell, 2013/06/27
- [Qemu-devel] [PATCH 4/8] virtio: Support transports which can specify the vring alignment, Peter Maydell, 2013/06/27
- [Qemu-devel] [PATCH 7/8] vexpress: Make VEDBoardInfo extend arm_boot_info, Peter Maydell, 2013/06/27
- [Qemu-devel] [PATCH 8/8] vexpress: Add virtio-mmio transports, Peter Maydell, 2013/06/27
- [Qemu-devel] [PATCH 1/8] device_tree: Add qemu_devtree_setprop_sized_cells() utility functions, Peter Maydell, 2013/06/27
- [Qemu-devel] [PATCH 2/8] arm/boot: Use qemu_devtree_setprop_sized_cells(), Peter Maydell, 2013/06/27