Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * EFI entry point.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 2013, 2014 Red Hat, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * Author: Mark Salter <msalter@redhat.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/linkage.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/assembler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	__INIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) SYM_CODE_START(efi_enter_kernel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	 * efi_pe_entry() will have copied the kernel image if necessary and we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	 * end up here with device tree address in x1 and the kernel entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	 * point stored in x0. Save those values in registers which are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	 * callee preserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	ldr	w2, =primary_entry_offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	add	x19, x0, x2		// relocated Image entrypoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	mov	x20, x1			// DTB address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	 * Clean the copied Image to the PoC, and ensure it is not shadowed by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	 * stale icache entries from before relocation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	ldr	w1, =kernel_size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	bl	__clean_dcache_area_poc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	ic	ialluis
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	 * Clean the remainder of this routine to the PoC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	 * so that we can safely disable the MMU and caches.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	adr	x0, 0f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	ldr	w1, 3f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	bl	__clean_dcache_area_poc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	/* Turn off Dcache and MMU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	mrs	x0, CurrentEL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	cmp	x0, #CurrentEL_EL2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	b.ne	1f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	mrs	x0, sctlr_el2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	bic	x0, x0, #1 << 0	// clear SCTLR.M
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	bic	x0, x0, #1 << 2	// clear SCTLR.C
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	pre_disable_mmu_workaround
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	msr	sctlr_el2, x0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	isb
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	b	2f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	mrs	x0, sctlr_el1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	bic	x0, x0, #1 << 0	// clear SCTLR.M
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	bic	x0, x0, #1 << 2	// clear SCTLR.C
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	pre_disable_mmu_workaround
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	msr	sctlr_el1, x0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	isb
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	/* Jump to kernel entry point */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	mov	x0, x20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	mov	x1, xzr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	mov	x2, xzr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	mov	x3, xzr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 	br	x19
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) SYM_CODE_END(efi_enter_kernel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 3:	.long	. - 0b