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 13ENTRY(armv8_switch_to_el2) 14 switch_el x5, 1f, 0f, 0f 150: 16 cmp x4, #ES_TO_AARCH64 17 b.eq 2f 18 /* 19 * When loading 32-bit kernel, it will jump 20 * to secure firmware again, and never return. 21 */ 22 bl armv8_el2_to_aarch32 232: 24 /* 25 * x3 is kernel entry point or switch_to_el1 26 * if CONFIG_ARMV8_SWITCH_TO_EL1 is defined. 27 * When running in EL2 now, jump to the 28 * address saved in x3. 29 */ 30 br x3 311: armv8_switch_to_el2_m x3, x4, x5 32ENDPROC(armv8_switch_to_el2) 33 34ENTRY(armv8_switch_to_el1) 35 switch_el x5, 0f, 1f, 0f 360: 37 /* x3 is kernel entry point. When running in EL1 38 * now, jump to the address saved in x3. 39 */ 40 br x3 411: armv8_switch_to_el1_m x3, x4, x5 42ENDPROC(armv8_switch_to_el1) 43 44WEAK(armv8_el2_to_aarch32) 45 ret 46ENDPROC(armv8_el2_to_aarch32) 47