1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (C) 2019 FORTH-ICS/CARV
22  * machine_kexec_prepare - Initialize kexec
33 	struct kimage_arch *internal = &image->arch;  in machine_kexec_prepare()
40 	for (i = 0; i < image->nr_segments; i++) {  in machine_kexec_prepare()
41 		if (image->segment[i].memsz <= sizeof(fdt))  in machine_kexec_prepare()
44 		if (image->file_mode)  in machine_kexec_prepare()
45 			memcpy(&fdt, image->segment[i].buf, sizeof(fdt));  in machine_kexec_prepare()
46 		else if (copy_from_user(&fdt, image->segment[i].buf, sizeof(fdt)))  in machine_kexec_prepare()
52 		internal->fdt_addr = (unsigned long) image->segment[i].mem;  in machine_kexec_prepare()
56 	if (!internal->fdt_addr) {  in machine_kexec_prepare()
58 		return -EINVAL;  in machine_kexec_prepare()
62 	if (image->type != KEXEC_TYPE_CRASH) {  in machine_kexec_prepare()
63 		control_code_buffer = page_address(image->control_code_page);  in machine_kexec_prepare()
64 		control_code_buffer_sz = page_size(image->control_code_page);  in machine_kexec_prepare()
68 			return -EINVAL;  in machine_kexec_prepare()
75 		set_memory_x((unsigned long) control_code_buffer, 1);  in machine_kexec_prepare()
83  * machine_kexec_cleanup - Cleanup any leftovers from
86  * This function is called by kimage_free to handle any arch-specific
98  * machine_shutdown - Prepare for a kexec reboot
107 	 * No more interrupts on this hart  in machine_shutdown()
118  * machine_crash_shutdown - Prepare to kexec after a kernel crash
121  * and its goal is to shutdown non-crashing cpus and save registers.
128 	/* shutdown non-crashing cpus */  in machine_crash_shutdown()
138  * machine_kexec - Jump to the loaded kimage
142  * or by crash_kernel which is called by the kernel's arch-specific
144  * the kexec process where the pre-loaded kimage is ready to be
146  * suspended and this hart will be the new boot hart.
151 	struct kimage_arch *internal = &image->arch;  in machine_kexec()
152 	unsigned long jump_addr = (unsigned long) image->start;  in machine_kexec()
153 	unsigned long first_ind_entry = (unsigned long) &image->head;  in machine_kexec()
156 	unsigned long fdt_addr = internal->fdt_addr;  in machine_kexec()
157 	void *control_code_buffer = page_address(image->control_code_page);  in machine_kexec()
165 	if (image->type != KEXEC_TYPE_CRASH)  in machine_kexec()
170 	pr_notice("Will call new kernel at %08lx from hart id %lx\n",  in machine_kexec()
174 	/* Make sure the relocation code is visible to the hart */  in machine_kexec()