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[PATCH 14/31] arm: qemu: Add an SPL build


From: Simon Glass
Subject: [PATCH 14/31] arm: qemu: Add an SPL build
Date: Sun, 31 Oct 2021 19:17:16 -0600

Add an SPL build for qemu so we can test the standard passage feature.

Include a binman definition so that SPL and U-Boot are in the same image.

For now this just boots to a prompt.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

 arch/arm/dts/qemu-arm-u-boot.dtsi    | 22 +++++++++
 arch/arm/mach-qemu/Kconfig           |  9 ++++
 board/emulation/qemu-arm/Kconfig     | 23 +++++++--
 board/emulation/qemu-arm/MAINTAINERS |  1 +
 board/emulation/qemu-arm/Makefile    |  1 +
 board/emulation/qemu-arm/spl.c       | 27 +++++++++++
 configs/qemu_arm_spl_defconfig       | 72 ++++++++++++++++++++++++++++
 doc/board/emulation/qemu-arm.rst     | 38 +++++++++++++++
 8 files changed, 189 insertions(+), 4 deletions(-)
 create mode 100644 arch/arm/dts/qemu-arm-u-boot.dtsi
 create mode 100644 board/emulation/qemu-arm/spl.c
 create mode 100644 configs/qemu_arm_spl_defconfig

diff --git a/arch/arm/dts/qemu-arm-u-boot.dtsi 
b/arch/arm/dts/qemu-arm-u-boot.dtsi
new file mode 100644
index 00000000000..2c5c7df62b4
--- /dev/null
+++ b/arch/arm/dts/qemu-arm-u-boot.dtsi
@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * Sample device tree for qemu_arm
+
+ * Copyright 2021 Google LLC
+ */
+
+/ {
+       binman {
+               u-boot-spl {
+                       size = <0x10000>;
+               };
+
+               u-boot {
+               };
+       };
+
+       pl011@9000000 {
+               u-boot,dm-spl;
+       };
+
+};
diff --git a/arch/arm/mach-qemu/Kconfig b/arch/arm/mach-qemu/Kconfig
index 186c3582ebf..ab0651ce0b1 100644
--- a/arch/arm/mach-qemu/Kconfig
+++ b/arch/arm/mach-qemu/Kconfig
@@ -20,6 +20,15 @@ config TARGET_QEMU_ARM_32BIT
        select CPU_V7A
        select SYS_ARCH_TIMER
 
+config TARGET_QEMU_ARM_32BIT_SPL
+       bool "ARMv7-A, 32bit with SPL"
+       select ARCH_SUPPORT_PSCI
+       select BOARD_LATE_INIT
+       select CPU_V7A
+       select SYS_ARCH_TIMER
+       select SPL
+       select BINMAN
+
 config TARGET_QEMU_ARM_64BIT
        bool "ARMv8, 64bit"
        select ARM64
diff --git a/board/emulation/qemu-arm/Kconfig b/board/emulation/qemu-arm/Kconfig
index 95dbefa78ba..85fbe7a9a35 100644
--- a/board/emulation/qemu-arm/Kconfig
+++ b/board/emulation/qemu-arm/Kconfig
@@ -1,12 +1,10 @@
-if TARGET_QEMU_ARM_32BIT || TARGET_QEMU_ARM_64BIT
-
-config SYS_TEXT_BASE
-       default 0x00000000
+if ARCH_QEMU
 
 config BOARD_SPECIFIC_OPTIONS # dummy
        def_bool y
        select CMD_QFW
        select QFW_MMIO
+       select SUPPORT_SPL
        imply VIRTIO_MMIO
        imply VIRTIO_PCI
        imply VIRTIO_NET
@@ -14,6 +12,13 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 
 endif
 
+if TARGET_QEMU_ARM_32BIT || TARGET_QEMU_ARM_64BIT
+
+config SYS_TEXT_BASE
+       default 0x00000000
+
+endif
+
 if TARGET_QEMU_ARM_64BIT && !TFABOOT
 config BOARD_SPECIFIC_OPTIONS
        imply SYS_MTDPARTS_RUNTIME
@@ -21,3 +26,13 @@ config BOARD_SPECIFIC_OPTIONS
 
 source "board/emulation/common/Kconfig"
 endif
+
+if TARGET_QEMU_ARM_32BIT_SPL
+
+config SPL_TEXT_BASE
+       default 0x00000000
+
+config SYS_TEXT_BASE
+       default 0x00010000
+
+endif
diff --git a/board/emulation/qemu-arm/MAINTAINERS 
b/board/emulation/qemu-arm/MAINTAINERS
index e757ffc64f1..b79d4ab85b2 100644
--- a/board/emulation/qemu-arm/MAINTAINERS
+++ b/board/emulation/qemu-arm/MAINTAINERS
@@ -4,4 +4,5 @@ S:      Maintained
 F:     board/emulation/qemu-arm/
 F:     include/configs/qemu-arm.h
 F:     configs/qemu_arm_defconfig
+F:     configs/qemu_arm_spl_defconfig
 F:     configs/qemu_arm64_defconfig
diff --git a/board/emulation/qemu-arm/Makefile 
b/board/emulation/qemu-arm/Makefile
index a22d1237ff4..54635646e07 100644
--- a/board/emulation/qemu-arm/Makefile
+++ b/board/emulation/qemu-arm/Makefile
@@ -1,3 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0+
 
 obj-y  += qemu-arm.o
+obj-$(CONFIG_SPL_BUILD)        += spl.o
diff --git a/board/emulation/qemu-arm/spl.c b/board/emulation/qemu-arm/spl.c
new file mode 100644
index 00000000000..785177a6c8d
--- /dev/null
+++ b/board/emulation/qemu-arm/spl.c
@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2021 Google LLC
+ * Written by Simon Glass <sjg@chromium.org>
+ */
+
+#include <common.h>
+#include <cpu_func.h>
+#include <spl.h>
+#include <asm/spl.h>
+
+u32 spl_boot_device(void)
+{
+       return BOOT_DEVICE_BOARD;
+}
+
+static int spl_qemu_load_image(struct spl_image_info *spl_image,
+                              struct spl_boot_device *bootdev)
+{
+       spl_image->name = "U-Boot";
+       spl_image->load_addr = spl_get_image_pos();
+       spl_image->entry_point = spl_get_image_pos();
+       flush_cache(spl_image->load_addr, spl_get_image_size());
+
+       return 0;
+}
+SPL_LOAD_IMAGE_METHOD("QEMU", 0, BOOT_DEVICE_BOARD, spl_qemu_load_image);
diff --git a/configs/qemu_arm_spl_defconfig b/configs/qemu_arm_spl_defconfig
new file mode 100644
index 00000000000..a6950584542
--- /dev/null
+++ b/configs/qemu_arm_spl_defconfig
@@ -0,0 +1,72 @@
+CONFIG_ARM=y
+CONFIG_SYS_ICACHE_OFF=y
+CONFIG_SYS_DCACHE_OFF=y
+CONFIG_ARM_SMCCC=y
+CONFIG_ARCH_QEMU=y
+CONFIG_SPL_LIBCOMMON_SUPPORT=y
+CONFIG_SPL_LIBGENERIC_SUPPORT=y
+CONFIG_NR_DRAM_BANKS=1
+CONFIG_ENV_SIZE=0x40000
+CONFIG_ENV_SECT_SIZE=0x40000
+CONFIG_SYS_MALLOC_LEN=0x1000000
+CONFIG_DEFAULT_DEVICE_TREE="qemu-arm"
+CONFIG_TARGET_QEMU_ARM_32BIT_SPL=y
+CONFIG_SPL_SERIAL=y
+CONFIG_DEBUG_UART_BASE=0x9000000
+CONFIG_DEBUG_UART_CLOCK=0
+CONFIG_ARMV7_LPAE=y
+CONFIG_DEBUG_UART=y
+CONFIG_AHCI=y
+CONFIG_DISTRO_DEFAULTS=y
+CONFIG_SYS_LOAD_ADDR=0x40200000
+CONFIG_FIT=y
+CONFIG_FIT_SIGNATURE=y
+CONFIG_FIT_VERBOSE=y
+CONFIG_FIT_BEST_MATCH=y
+CONFIG_LEGACY_IMAGE_FORMAT=y
+CONFIG_USE_PREBOOT=y
+# CONFIG_DISPLAY_CPUINFO is not set
+# CONFIG_DISPLAY_BOARDINFO is not set
+CONFIG_PCI_INIT_R=y
+CONFIG_SPL_FRAMEWORK_BOARD_INIT_F=y
+CONFIG_CMD_BOOTEFI_SELFTEST=y
+CONFIG_CMD_NVEDIT_EFI=y
+CONFIG_CMD_DFU=y
+CONFIG_CMD_MTD=y
+CONFIG_CMD_PCI=y
+CONFIG_CMD_USB=y
+CONFIG_CMD_MTDPARTS=y
+CONFIG_SPL_OF_CONTROL=y
+CONFIG_OF_BOARD=y
+CONFIG_ENV_IS_IN_FLASH=y
+CONFIG_ENV_ADDR=0x4000000
+CONFIG_SPL_DM=y
+CONFIG_SCSI_AHCI=y
+CONFIG_AHCI_PCI=y
+CONFIG_DFU_TFTP=y
+CONFIG_DFU_MTD=y
+CONFIG_DFU_RAM=y
+# CONFIG_MMC is not set
+CONFIG_MTD=y
+CONFIG_DM_MTD=y
+CONFIG_MTD_NOR_FLASH=y
+CONFIG_CFI_FLASH=y
+CONFIG_SYS_FLASH_USE_BUFFER_WRITE=y
+CONFIG_FLASH_CFI_MTD=y
+CONFIG_SYS_FLASH_CFI=y
+CONFIG_DM_ETH=y
+CONFIG_E1000=y
+CONFIG_NVME=y
+CONFIG_PCI=y
+CONFIG_PCIE_ECAM_GENERIC=y
+CONFIG_SCSI=y
+CONFIG_DM_SCSI=y
+CONFIG_DEBUG_UART_PL011=y
+CONFIG_DEBUG_UART_SHIFT=2
+CONFIG_SYSRESET=y
+CONFIG_SPL_SYSRESET=y
+CONFIG_SYSRESET_PSCI=y
+CONFIG_USB=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_PCI=y
+# CONFIG_BINMAN_FDT is not set
diff --git a/doc/board/emulation/qemu-arm.rst b/doc/board/emulation/qemu-arm.rst
index a39df046fc3..aa05d0a5afe 100644
--- a/doc/board/emulation/qemu-arm.rst
+++ b/doc/board/emulation/qemu-arm.rst
@@ -38,6 +38,11 @@ Set the CROSS_COMPILE environment variable as usual, and run:
     make qemu_arm64_defconfig
     make
 
+- for ARM with SPL::
+
+    make qemu_arm_spl_defconfig
+    make
+
 Running U-Boot
 --------------
 The minimal QEMU command line to get U-Boot up and running is:
@@ -50,6 +55,10 @@ The minimal QEMU command line to get U-Boot up and running 
is:
 
     qemu-system-aarch64 -machine virt -nographic -cpu cortex-a57 -bios 
u-boot.bin
 
+- For ARM with SPL::
+
+    qemu-system-arm -machine virt -nographic -bios image.bin
+
 Note that for some odd reason qemu-system-aarch64 needs to be explicitly
 told to use a 64-bit CPU or it will boot in 32-bit mode. The -nographic 
argument
 ensures that output appears on the terminal. Use Ctrl-A X to quit.
@@ -85,6 +94,35 @@ can be enabled with the following command line parameters:
 
 These have been tested in QEMU 2.9.0 but should work in at least 2.5.0 as well.
 
+SPL Description
+---------------
+
+As you see above, running the SPL build is a little different, since there are
+two binaries to load into memory: SPL and U-Boot proper. Binman is used to
+produce the combined `image.bin` containing these. See
+`arch/arm/dts/qemu-arm-u-boot.dtsi` for the definition. A custom loader called
+`spl_qemu_load_image()` is used to access the U-Boot binary from within SPL.
+
+A sample run is shown below::
+
+    U-Boot SPL 2021.10 (Oct 28 2021 - 20:57:27 -0600)
+    Trying to boot from QEMU
+
+
+    U-Boot 2021.10 (Oct 28 2021 - 20:57:27 -0600)
+
+    DRAM:  128 MiB
+    Flash: 64 MiB
+    Loading Environment from Flash... *** Warning - bad CRC, using default 
environment
+
+    In:    pl011@9000000
+    Out:   pl011@9000000
+    Err:   pl011@9000000
+    Net:   eth0: virtio-net#32
+    Hit any key to stop autoboot:  0
+    =>
+
+
 Debug UART
 ----------
 
-- 
2.33.1.1089.g2158813163f-goog




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