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platform: qemu/virt: Move kernel start address to 4MB alligned

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In order to support 32-bit guests move the start address to a 4MB
allignment. As 64-bit kernels have a requirement on being 2MB alligned
let's just make this the default for both 32 and 64 bit kernels.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Alistair Francis
2019-01-29 09:59:31 -08:00
committed by Anup Patel
parent a5f06b30c1
commit 9f44d07df5
2 changed files with 6 additions and 4 deletions
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4
docs/platform/qemu_virt.md
View File

@@ -50,7 +50,7 @@ or
```
qemu-system-riscv64 -M virt -m 256M -display none -serial stdio \
-kernel build/platform/qemu/virt/firmware/fw_jump.elf \
-device loader,file=<uboot_build_directory>/u-boot.bin,addr=0x80200000
-device loader,file=<uboot_build_directory>/u-boot.bin,addr=0x80400000
```
**Linux Kernel Payload**
@@ -75,7 +75,7 @@ or
```
qemu-system-riscv64 -M virt -m 256M -display none -serial stdio \
-kernel build/platform/qemu/virt/firmware/fw_jump.elf \
-device loader,file=<linux_build_directory>/arch/riscv/boot/Image,addr=0x80200000 \
-device loader,file=<linux_build_directory>/arch/riscv/boot/Image,addr=0x80400000 \
-drive file=<path_to_linux_rootfs>,format=raw,id=hd0 \
-device virtio-blk-device,drive=hd0 \
-append "root=/dev/vda rw console=ttyS0"

6
platform/qemu/virt/config.mk
View File

@@ -30,10 +30,12 @@ PLATFORM_SYS_CLINT=y
# Blobs to build
FW_TEXT_START=0x80000000
FW_JUMP=y
FW_JUMP_ADDR=0x80200000
# This needs to be 4MB alligned for 32-bit support
FW_JUMP_ADDR=0x80400000
FW_JUMP_FDT_ADDR=0x82200000
FW_PAYLOAD=y
FW_PAYLOAD_OFFSET=0x200000
# This needs to be 4MB alligned for 32-bit support
FW_PAYLOAD_OFFSET=0x400000
FW_PAYLOAD_FDT_ADDR=0x82200000
# External Libraries to include