[PATCH 07/11] vexpress64: fvp: add distro_boot support
Andre Przywara
andre.przywara at arm.com
Fri Mar 4 17:30:14 CET 2022
So far the FVP model just supports booting through semihosting, so by
loading files from the host the model is running on. This allows for
quick booting of new kernels (or replacing DTBs), but prevents more
featureful boots like using UEFI.
Enable the distro_boot feature, and provide a list of possible boot
sources that U-Boot should check:
- For backwards compatibility we start with semihosting, which gets its
commands migrated from CONFIG_BOOTCOMMAND into the distro_boot
infrastructure. This is also slightly tweaked to fail graceful in case
the required files could not be found.
- Next we try to use a user provided script, that could be easily
placed into memory using the model command line.
- Since we gained virtio support with the enablement of OF_CONTROL,
let's check virtio block devices next. This is where UEFI boot can
be easily used, for instance by providing a distro installer .iso
file through virtio-blk.
- Networking is now provided by virtio as well, so enable the default
PXE and DHCP boot flows, mostly because we can.
Signed-off-by: Andre Przywara <andre.przywara at arm.com>
---
arch/arm/Kconfig | 1 +
configs/vexpress_aemv8a_juno_defconfig | 1 -
configs/vexpress_aemv8a_semi_defconfig | 5 +--
include/configs/vexpress_aemv8.h | 57 ++++++++++++++++++++++++--
4 files changed, 55 insertions(+), 9 deletions(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index a46522db9d..974555f900 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1247,6 +1247,7 @@ config ARCH_VEXPRESS64
select MTD_NOR_FLASH if MTD
select FLASH_CFI_DRIVER if MTD
select ENV_IS_IN_FLASH if MTD
+ imply DISTRO_DEFAULTS
config TARGET_TOTAL_COMPUTE
bool "Support Total Compute Platform"
diff --git a/configs/vexpress_aemv8a_juno_defconfig b/configs/vexpress_aemv8a_juno_defconfig
index a0d3370ae2..b51f946ee1 100644
--- a/configs/vexpress_aemv8a_juno_defconfig
+++ b/configs/vexpress_aemv8a_juno_defconfig
@@ -6,7 +6,6 @@ CONFIG_SYS_MEMTEST_END=0xff000000
CONFIG_DEFAULT_DEVICE_TREE="juno-r2"
CONFIG_IDENT_STRING=" vexpress_aemv8a"
CONFIG_TARGET_VEXPRESS64_JUNO=y
-CONFIG_DISTRO_DEFAULTS=y
CONFIG_REMAKE_ELF=y
CONFIG_BOOTDELAY=1
CONFIG_USE_BOOTARGS=y
diff --git a/configs/vexpress_aemv8a_semi_defconfig b/configs/vexpress_aemv8a_semi_defconfig
index 3e2d076837..abbff36de9 100644
--- a/configs/vexpress_aemv8a_semi_defconfig
+++ b/configs/vexpress_aemv8a_semi_defconfig
@@ -6,13 +6,11 @@ CONFIG_SYS_MEMTEST_START=0x80000000
CONFIG_SYS_MEMTEST_END=0xff000000
CONFIG_DEFAULT_DEVICE_TREE="fvp-base-revc"
CONFIG_IDENT_STRING=" vexpress_aemv8a"
-CONFIG_DISTRO_DEFAULTS=y
CONFIG_REMAKE_ELF=y
CONFIG_ANDROID_BOOT_IMAGE=y
CONFIG_BOOTDELAY=1
CONFIG_USE_BOOTARGS=y
CONFIG_BOOTARGS="console=ttyAMA0 earlycon=pl011,0x1c090000 debug user_debug=31 loglevel=9"
-CONFIG_BOOTCOMMAND="if smhload ${boot_name} ${boot_addr_r}; then setenv bootargs; abootimg addr ${boot_addr_r}; abootimg get dtb --index=0 fdt_addr_r; bootm ${boot_addr_r} ${boot_addr_r} ${fdt_addr_r}; else; setenv fdt_high 0xffffffffffffffff; setenv initrd_high 0xffffffffffffffff; smhload ${kernel_name} ${kernel_addr_r}; smhload ${fdtfile} ${fdt_addr_r}; smhload ${ramdisk_name} ${ramdisk_addr_r} ramdisk_end; fdt addr ${fdt_addr_r}; fdt resize; fdt chosen ${ramdisk_addr_r} ${ramdisk_end}; booti $kernel_addr_r - $fdt_addr_r; fi"
# CONFIG_DISPLAY_CPUINFO is not set
# CONFIG_DISPLAY_BOARDINFO is not set
CONFIG_SYS_PROMPT="VExpress64# "
@@ -29,10 +27,9 @@ CONFIG_CMD_ARMFLASH=y
CONFIG_CMD_CACHE=y
# CONFIG_CMD_SLEEP is not set
CONFIG_CMD_UBI=y
-# CONFIG_ISO_PARTITION is not set
-# CONFIG_EFI_PARTITION is not set
# CONFIG_MMC is not set
CONFIG_MTD=y
CONFIG_SYS_FLASH_USE_BUFFER_WRITE=y
CONFIG_SYS_FLASH_PROTECTION=y
CONFIG_SYS_FLASH_CFI=y
+CONFIG_VIRTIO_MMIO=y
diff --git a/include/configs/vexpress_aemv8.h b/include/configs/vexpress_aemv8.h
index 983d60211a..2bf0c78a56 100644
--- a/include/configs/vexpress_aemv8.h
+++ b/include/configs/vexpress_aemv8.h
@@ -140,6 +140,50 @@
"booti ${kernel_addr_r} ${ramdisk_param} ${fdt_addr_r}\0"
#define BOOTENV_DEV_NAME_AFS(devtypeu, devtypel, instance) "afs "
+/* Boot by executing a U-Boot script pre-loaded into DRAM. */
+#define BOOTENV_DEV_MEM(devtypeu, devtypel, instance) \
+ "bootcmd_mem= " \
+ "source ${scriptaddr}; " \
+ "if test $? -eq 1; then " \
+ " env import -t ${scriptaddr}; " \
+ " if test -n $uenvcmd; then " \
+ " echo Running uenvcmd ...; " \
+ " run uenvcmd; " \
+ " fi; " \
+ "fi\0"
+#define BOOTENV_DEV_NAME_MEM(devtypeu, devtypel, instance) "mem "
+
+#ifdef CONFIG_CMD_VIRTIO
+#define FUNC_VIRTIO(func) func(VIRTIO, virtio, 0)
+#else
+#define FUNC_VIRTIO(func)
+#endif
+
+/*
+ * Boot by loading an Android image, or kernel, initrd and FDT through
+ * semihosting into DRAM.
+ */
+#define BOOTENV_DEV_SMH(devtypeu, devtypel, instance) \
+ "bootcmd_smh= " \
+ "if smhload ${boot_name} ${boot_addr_r}; then" \
+ " setenv bootargs;" \
+ " abootimg addr ${boot_addr_r};" \
+ " abootimg get dtb --index=0 fdt_addr_r;" \
+ " bootm ${boot_addr_r} ${boot_addr_r} ${fdt_addr_r};" \
+ "else" \
+ " if smhload ${kernel_name} ${kernel_addr_r}; then" \
+ " setenv fdt_high 0xffffffffffffffff;" \
+ " setenv initrd_high 0xffffffffffffffff;" \
+ " smhload ${fdtfile} ${fdt_addr_r};" \
+ " smhload ${ramdisk_name} ${ramdisk_addr_r} ramdisk_end;" \
+ " fdt addr ${fdt_addr_r};" \
+ " fdt resize;" \
+ " fdt chosen ${ramdisk_addr_r} ${ramdisk_end};" \
+ " booti $kernel_addr_r - $fdt_addr_r;" \
+ " fi;" \
+ "fi\0"
+#define BOOTENV_DEV_NAME_SMH(devtypeu, devtypel, instance) "smh "
+
/* Boot sources for distro boot and load addresses, per board */
#ifdef CONFIG_TARGET_VEXPRESS64_JUNO /* Arm Juno board */
@@ -152,8 +196,6 @@
func(DHCP, dhcp, na) \
func(AFS, afs, na)
-#include <config_distro_bootcmd.h>
-
#define VEXPRESS_KERNEL_ADDR 0x80080000
#define VEXPRESS_PXEFILE_ADDR 0x8fb00000
#define VEXPRESS_FDT_ADDR 0x8fc00000
@@ -169,6 +211,13 @@
#elif CONFIG_TARGET_VEXPRESS64_BASE_FVP /* ARMv8-A base model */
+#define BOOT_TARGET_DEVICES(func) \
+ func(SMH, smh, na) \
+ func(MEM, mem, na) \
+ FUNC_VIRTIO(func) \
+ func(PXE, pxe, na) \
+ func(DHCP, dhcp, na)
+
#define VEXPRESS_KERNEL_ADDR 0x80080000
#define VEXPRESS_PXEFILE_ADDR 0x8fa00000
#define VEXPRESS_SCRIPT_ADDR 0x8fb00000
@@ -183,10 +232,10 @@
"boot_name=boot.img\0" \
"boot_addr_r=" __stringify(VEXPRESS_BOOT_ADDR) "\0"
-#define BOOTENV
-
#endif
+#include <config_distro_bootcmd.h>
+
/* Default load addresses and names for the different payloads. */
#define CONFIG_EXTRA_ENV_SETTINGS \
"kernel_addr_r=" __stringify(VEXPRESS_KERNEL_ADDR) "\0" \
--
2.25.1
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