diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/boot.h | 1 | ||||
| -rw-r--r-- | include/dtb_patch.h | 27 |
2 files changed, 28 insertions, 0 deletions
diff --git a/include/boot.h b/include/boot.h index a5fe3ae..a28b47c 100644 --- a/include/boot.h +++ b/include/boot.h @@ -26,6 +26,7 @@ struct tb_image { int tb_image_setup(uintptr_t image, struct tb_image *img); /* common/load.c */ +int tb_load_raw(const char *fname, uintptr_t load_addr); int tb_load_semihosting(const char *fname, uintptr_t load_addr, struct tb_image *img); diff --git a/include/dtb_patch.h b/include/dtb_patch.h new file mode 100644 index 0000000..7fbe225 --- /dev/null +++ b/include/dtb_patch.h @@ -0,0 +1,27 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __TB_DTB_PATCH_H +#define __TB_DTB_PATCH_H + +#include <stdint.h> + +/* + * minimal dtb patcher, no libfdt. walks the flattened devicetree + * structure per the devicetree specification (devicetree.dtsi format: + * FDT_BEGIN_NODE, name, property, FDT_END_NODE) and rewrites the cpu + * nodes for spin table bringup. + * + * what it does: + * /cpus/cpu@N: enable-method = "spin-table" + * cpu-release-addr = gate address of core N + * /psci: status = "disabled" (so the kernel falls back to the + * spin table instead of trying hvc) + * + * properties are rewritten in place where the space fits, the + * enable-method string shrinks, cpu-release-addr reuses the space + * of an old value. new properties are appended to the last cpu node + * by growing the struct block and moving the strings block. + */ + +int tb_dtb_patch_spin_table(uintptr_t dtb, uintptr_t *gates, int ngates); + +#endif /* __TB_DTB_PATCH_H */ |