1/* 2 * (C) Copyright 2013 3 * David Feng <fenghua@phytium.com.cn> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8#include <asm-offsets.h> 9#include <config.h> 10#include <linux/linkage.h> 11#include <asm/macro.h> 12 13.pushsection .text.armv8_switch_to_el2, "ax" 14ENTRY(armv8_switch_to_el2) 15 switch_el x6, 1f, 0f, 0f 160: 17 cmp x5, #ES_TO_AARCH64 18 b.eq 2f 19 /* 20 * When loading 32-bit kernel, it will jump 21 * to secure firmware again, and never return. 22 */ 23 bl armv8_el2_to_aarch32 242: 25 /* 26 * x4 is kernel entry point or switch_to_el1 27 * if CONFIG_ARMV8_SWITCH_TO_EL1 is defined. 28 * When running in EL2 now, jump to the 29 * address saved in x4. 30 */ 31 br x4 321: armv8_switch_to_el2_m x4, x5, x6 33ENDPROC(armv8_switch_to_el2) 34.popsection 35 36.pushsection .text.armv8_switch_to_el1, "ax" 37ENTRY(armv8_switch_to_el1) 38 switch_el x6, 0f, 1f, 0f 390: 40 /* x4 is kernel entry point. When running in EL1 41 * now, jump to the address saved in x4. 42 */ 43 br x4 441: armv8_switch_to_el1_m x4, x5, x6 45ENDPROC(armv8_switch_to_el1) 46.popsection 47 48.pushsection .text.armv8_el2_to_aarch32, "ax" 49WEAK(armv8_el2_to_aarch32) 50 ret 51ENDPROC(armv8_el2_to_aarch32) 52.popsection 53