Attention is currently required from: Philipp Hug, ron minnich.

Alper Nebi Yasak has uploaded this change for review.

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mainboard/qemu-riscv: Enable QEMU fw_cfg driver

Enable the QEMU firmware configuration device driver for RISC-V QEMU
virtual machines. The device address is from QEMU source code [1].

[1] https://gitlab.com/qemu-project/qemu/-/blob/v8.2.1/hw/riscv/virt.c#L99

Change-Id: I407499e6c985ee8fa64ee848eb60986975f79d26
Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
---
M src/mainboard/emulation/qemu-riscv/Kconfig
M src/mainboard/emulation/qemu-riscv/include/mainboard/addressmap.h
2 files changed, 5 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/71/80371/1

diff --git a/src/mainboard/emulation/qemu-riscv/Kconfig b/src/mainboard/emulation/qemu-riscv/Kconfig
index 091c432..206ea19 100644
--- a/src/mainboard/emulation/qemu-riscv/Kconfig
+++ b/src/mainboard/emulation/qemu-riscv/Kconfig
@@ -28,8 +28,12 @@
 	select BOOT_DEVICE_NOT_SPI_FLASH
 	select MISSING_BOARD_RESET
 	select DRIVERS_UART_8250MEM
+	select DRIVERS_EMULATION_QEMU_FW_CFG
 	select RISCV_HAS_OPENSBI
 
+config QEMU_FW_CFG_BASE_ADDRESS
+	default 0x10100000
+
 config MEMLAYOUT_LD_FILE
 	string
 	default "src/mainboard/emulation/qemu-riscv/memlayout.ld"
diff --git a/src/mainboard/emulation/qemu-riscv/include/mainboard/addressmap.h b/src/mainboard/emulation/qemu-riscv/include/mainboard/addressmap.h
index 27baeb7..5bb1306 100644
--- a/src/mainboard/emulation/qemu-riscv/include/mainboard/addressmap.h
+++ b/src/mainboard/emulation/qemu-riscv/include/mainboard/addressmap.h
@@ -4,4 +4,5 @@
 #define QEMU_VIRT_PLIC		0x0c000000
 #define QEMU_VIRT_UART0		0x10000000
 #define QEMU_VIRT_VIRTIO	0x10001000
+#define QEMU_VIRT_FW_CFG_BASE	0x10100000
 #define QEMU_VIRT_DRAM		0x80000000

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