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Diffstat (limited to 'common/boards/qemu-virt/board.c')
-rw-r--r-- | common/boards/qemu-virt/board.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/common/boards/qemu-virt/board.c b/common/boards/qemu-virt/board.c new file mode 100644 index 0000000000..4f2f7374c5 --- /dev/null +++ b/common/boards/qemu-virt/board.c @@ -0,0 +1,90 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2020 Pengutronix e.K. + * + */ +#include <common.h> +#include <init.h> +#include <of.h> +#include <deep-probe.h> +#include "qemu-virt-flash.h" + +#ifdef CONFIG_64BIT +#define MACHINE "virt64" +#else +#define MACHINE "virt" +#endif + +#ifdef CONFIG_ARM +#include <asm/system_info.h> + +static inline void arm_virt_init(void) +{ + const char *hostname = MACHINE; + + if (cpu_is_cortex_a7()) + hostname = "virt-a7"; + else if (cpu_is_cortex_a15()) + hostname = "virt-a15"; + + barebox_set_model("ARM QEMU " MACHINE); + barebox_set_hostname(hostname); +} + +#else +static inline void arm_virt_init(void) {} +#endif + +extern char __dtbo_qemu_virt_flash_start[]; +extern char __dtb_fitimage_pubkey_start[]; + +static const struct of_device_id virt_of_match[] = { + { .compatible = "linux,dummy-virt", .data = arm_virt_init }, + { .compatible = "riscv-virtio" }, + { /* Sentinel */}, +}; +BAREBOX_DEEP_PROBE_ENABLE(virt_of_match); + +/* + * We don't have a dedicated qemu-virt device tree and instead rely + * on what Qemu passes us. To be able to get fundamental changes + * in very early, we forego having a board driver here and do this + * directly in the initcall. + */ +static int virt_board_driver_init(void) +{ + struct device_node *root = of_get_root_node(); + struct device_node *flash, *overlay, *pubkey; + const struct of_device_id *id; + void (*init)(void); + + id = of_match_node(virt_of_match, root); + if (!id) + return 0; + + if (id->data) { + init = id->data; + init(); + } + + /* + * Catch both old Qemu versions that place /flash in /soc and + * configurations, where the first flash bank is secure-world only + */ + flash = of_find_node_by_path(PARTS_TARGET_PATH_STR); + if (flash && of_device_is_available(flash)) { + overlay = of_unflatten_dtb(__dtbo_qemu_virt_flash_start, INT_MAX); + of_overlay_apply_tree(root, overlay); + } + + pubkey = of_unflatten_dtb(__dtb_fitimage_pubkey_start, INT_MAX); + of_merge_nodes(root, pubkey); + + /* fragment may have added aliases to the DT */ + of_alias_scan(); + + /* of_probe() will happen later at of_populate_initcall */ + + return 0; +} +postcore_initcall(virt_board_driver_init); |