riscv/kernel/kexec_relocate.S

1 /* SPDX-License-Identifier: GPL-2.0 */
3  * Copyright (C) 2019 FORTH-ICS/CARV
16 	 * s0: Pointer to the current entry
17 	 * s1: (const) Phys address to jump to after relocation
18 	 * s2: (const) Phys address of the FDT image
21 	 * s5: Pointer to the destination address for the relocation
22 	 * s6: (const) Physical address of the main loop
41 	 * deal with this we set stvec to the physical address at
50 	 * With C-extension, here we get 42 Bytes and the next
59 	REG_L	t0, 0(s0)		/* t0 = *image->entry */
60 	addi	s0, s0, RISCV_SZPTR	/* image->entry++ */
62 	/* IND_DESTINATION entry ? -> save destination address */
69 	/* IND_INDIRECTION entry ? -> update next entry ptr (PA) */
77 	/* IND_DONE entry ? -> jump to done label */
84 	 * IND_SOURCE entry ? -> copy page word by word to the
85 	 * destination address we got from IND_DESTINATION
88 	beqz	t1, 1b		/* Unknown entry type, ignore it */
96 	addi	t3, t3, -0x1	/* i-- */
153 	 * s0: (const) Phys address to jump to
154 	 * s1: (const) Phys address of the FDT image
204 	 * which in this case is the address of the new
214 	.long riscv_kexec_relocate_end - riscv_kexec_relocate)