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Add macro to check whether the CPU implements an EL

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Replace all instances of checks with the new macro.

Change-Id: I0eec39b9376475a1a9707a3115de9d36f88f8a2a
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>
This commit is contained in:
Jeenu Viswambharan 2017-02-21 14:40:44 +00:00
parent 7fa3214e18
commit f4c8aa9054
8 changed files with 22 additions and 27 deletions
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10
bl1/aarch64/bl1_context_mgmt.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@ -72,8 +72,7 @@ void bl1_prepare_next_image(unsigned int image_id)
* Ensure that the build flag to save AArch32 system registers in CPU
* context is not set for AArch64-only platforms.
*/
if (((read_id_aa64pfr0_el1() >> ID_AA64PFR0_EL1_SHIFT)
& ID_AA64PFR0_ELX_MASK) == 0x1) {
if (EL_IMPLEMENTED(1) == EL_IMPL_A64ONLY) {
ERROR("EL1 supports AArch64-only. Please set build flag "
"CTX_INCLUDE_AARCH32_REGS = 0");
panic();
@ -99,9 +98,8 @@ void bl1_prepare_next_image(unsigned int image_id)
next_bl_ep->spsr = SPSR_64(MODE_EL1, MODE_SP_ELX,
DISABLE_ALL_EXCEPTIONS);
} else {
/* Use EL2 if supported else use EL1. */
if (read_id_aa64pfr0_el1() &
(ID_AA64PFR0_ELX_MASK << ID_AA64PFR0_EL2_SHIFT)) {
/* Use EL2 if supported; else use EL1. */
if (EL_IMPLEMENTED(2)) {
next_bl_ep->spsr = SPSR_64(MODE_EL2, MODE_SP_ELX,
DISABLE_ALL_EXCEPTIONS);
} else {

3
bl31/bl31_main.c
View file

@ -172,8 +172,7 @@ void bl31_prepare_next_image_entry(void)
* Ensure that the build flag to save AArch32 system registers in CPU
* context is not set for AArch64-only platforms.
*/
if (((read_id_aa64pfr0_el1() >> ID_AA64PFR0_EL1_SHIFT)
& ID_AA64PFR0_ELX_MASK) == 0x1) {
if (EL_IMPLEMENTED(1) == EL_IMPL_A64ONLY) {
ERROR("EL1 supports AArch64-only. Please set build flag "
"CTX_INCLUDE_AARCH32_REGS = 0");
panic();

4
include/lib/aarch64/arch.h
View file

@ -134,6 +134,10 @@
#define ID_AA64PFR0_EL3_SHIFT 12
#define ID_AA64PFR0_ELX_MASK 0xf
#define EL_IMPL_NONE 0
#define EL_IMPL_A64ONLY 1
#define EL_IMPL_A64_A32 2
#define ID_AA64PFR0_GIC_SHIFT 24
#define ID_AA64PFR0_GIC_WIDTH 4
#define ID_AA64PFR0_GIC_MASK ((1 << ID_AA64PFR0_GIC_WIDTH) - 1)

8
include/lib/aarch64/arch_helpers.h
View file

@ -352,6 +352,14 @@ DEFINE_RENAME_SYSREG_WRITE_FUNC(icc_eoir1_el1, ICC_EOIR1_EL1)
#define IS_IN_EL1() IS_IN_EL(1)
#define IS_IN_EL3() IS_IN_EL(3)
/*
* Check if an EL is implemented from AA64PFR0 register fields. 'el' argument
* must be one of 1, 2 or 3.
*/
#define EL_IMPLEMENTED(el) \
((read_id_aa64pfr0_el1() >> ID_AA64PFR0_EL##el##_SHIFT) \
& ID_AA64PFR0_ELX_MASK)
/* Previously defined accesor functions with incomplete register names */
#define read_current_el() read_CurrentEl()

3
lib/el3_runtime/aarch64/context_mgmt.c
View file

@ -229,8 +229,7 @@ void cm_prepare_el3_exit(uint32_t security_state)
sctlr_elx &= ~SCTLR_EE_BIT;
sctlr_elx |= SCTLR_EL2_RES1;
write_sctlr_el2(sctlr_elx);
} else if (read_id_aa64pfr0_el1() &
(ID_AA64PFR0_ELX_MASK << ID_AA64PFR0_EL2_SHIFT)) {
} else if (EL_IMPLEMENTED(2)) {
/* EL2 present but unused, need to disable safely */
/* HCR_EL2 = 0, except RW bit set to match SCR_EL3 */

6
plat/arm/common/arm_common.c
View file

@ -137,15 +137,11 @@ uint32_t arm_get_spsr_for_bl32_entry(void)
#ifndef AARCH32
uint32_t arm_get_spsr_for_bl33_entry(void)
{
unsigned long el_status;
unsigned int mode;
uint32_t spsr;
/* Figure out what mode we enter the non-secure world in */
el_status = read_id_aa64pfr0_el1() >> ID_AA64PFR0_EL2_SHIFT;
el_status &= ID_AA64PFR0_ELX_MASK;
mode = (el_status) ? MODE_EL2 : MODE_EL1;
mode = EL_IMPLEMENTED(2) ? MODE_EL2 : MODE_EL1;
/*
* TODO: Consider the possibility of specifying the SPSR in

9
plat/mediatek/mt6795/bl31_plat_setup.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@ -360,20 +360,15 @@ void enable_ns_access_to_cpuectlr(void)
static entry_point_info_t *bl31_plat_get_next_kernel64_ep_info(void)
{
entry_point_info_t *next_image_info;
unsigned long el_status;
unsigned int mode;
el_status = 0;
mode = 0;
/* Kernel image is always non-secured */
next_image_info = &bl33_image_ep_info;
/* Figure out what mode we enter the non-secure world in */
el_status = read_id_aa64pfr0_el1() >> ID_AA64PFR0_EL2_SHIFT;
el_status &= ID_AA64PFR0_ELX_MASK;
if (el_status) {
if (EL_IMPLEMENTED(2)) {
INFO("Kernel_EL2\n");
mode = MODE_EL2;
} else{

6
plat/qemu/qemu_bl2_setup.c
View file

@ -226,15 +226,11 @@ static uint32_t qemu_get_spsr_for_bl32_entry(void)
******************************************************************************/
static uint32_t qemu_get_spsr_for_bl33_entry(void)
{
unsigned long el_status;
unsigned int mode;
uint32_t spsr;
/* Figure out what mode we enter the non-secure world in */
el_status = read_id_aa64pfr0_el1() >> ID_AA64PFR0_EL2_SHIFT;
el_status &= ID_AA64PFR0_ELX_MASK;
mode = (el_status) ? MODE_EL2 : MODE_EL1;
mode = EL_IMPLEMENTED(2) ? MODE_EL2 : MODE_EL1;
/*
* TODO: Consider the possibility of specifying the SPSR in