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spd: dispatcher for interacting with the Trusty TEE 

This patch adds the secure payload dispatcher for interacting
with Google's Trusty TEE. Documentation for Trusty can be found
at https://source.android.com/security/trusty

Original authors:
-----------------
* Arve Hjønnevåg <arve@android.com>
* Michael Ryleev <gmar@google.com>

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
This commit is contained in:
Varun Wadekar 2016-11-08 15:46:48 -08:00
parent 90d2956aea
commit 948c090d8c
6 changed files with 673 additions and 0 deletions
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Trusty Dispatcher
=================
Trusty is a a set of software components, supporting a Trusted Execution
Environment (TEE) on mobile devices, published and maintained by Google.
Detailed information and build instructions can be found on the Android
Open Source Project (AOSP) webpage for Trusty hosted at
https://source.android.com/security/trusty
Supported platforms
===================
Out of all the platforms supported by the ARM Trusted Firmware, Trusty is
verified and supported by NVIDIA's Tegra SoCs.

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/*
* Copyright (c) 2016, 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:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __LIB_SM_SM_ERR_H
#define __LIB_SM_SM_ERR_H
/* Errors from the secure monitor */
#define SM_ERR_UNDEFINED_SMC 0xFFFFFFFF /* Unknown SMC (defined by ARM DEN 0028A(0.9.0) */
#define SM_ERR_INVALID_PARAMETERS -2
#define SM_ERR_INTERRUPTED -3 /* Got interrupted. Call back with restart SMC */
#define SM_ERR_UNEXPECTED_RESTART -4 /* Got an restart SMC when we didn't expect it */
#define SM_ERR_BUSY -5 /* Temporarily busy. Call back with original args */
#define SM_ERR_INTERLEAVED_SMC -6 /* Got a trusted_service SMC when a restart SMC is required */
#define SM_ERR_INTERNAL_FAILURE -7 /* Unknown error */
#define SM_ERR_NOT_SUPPORTED -8
#define SM_ERR_NOT_ALLOWED -9 /* SMC call not allowed */
#define SM_ERR_END_OF_INPUT -10
#endif

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/*
* Copyright (c) 2016, 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:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __LIB_SM_SMCALL_H
#define __LIB_SM_SMCALL_H
#define SMC_NUM_ENTITIES 64
#define SMC_NUM_ARGS 4
#define SMC_NUM_PARAMS (SMC_NUM_ARGS - 1)
#define SMC_IS_FASTCALL(smc_nr) ((smc_nr) & 0x80000000)
#define SMC_IS_SMC64(smc_nr) ((smc_nr) & 0x40000000)
#define SMC_ENTITY(smc_nr) (((smc_nr) & 0x3F000000) >> 24)
#define SMC_FUNCTION(smc_nr) ((smc_nr) & 0x0000FFFF)
#define SMC_NR(entity, fn, fastcall, smc64) ((((fastcall) & 0x1) << 31) | \
(((smc64) & 0x1) << 30) | \
(((entity) & 0x3F) << 24) | \
((fn) & 0xFFFF) \
)
#define SMC_FASTCALL_NR(entity, fn) SMC_NR((entity), (fn), 1, 0)
#define SMC_STDCALL_NR(entity, fn) SMC_NR((entity), (fn), 0, 0)
#define SMC_FASTCALL64_NR(entity, fn) SMC_NR((entity), (fn), 1, 1)
#define SMC_STDCALL64_NR(entity, fn) SMC_NR((entity), (fn), 0, 1)
#define SMC_ENTITY_ARCH 0 /* ARM Architecture calls */
#define SMC_ENTITY_CPU 1 /* CPU Service calls */
#define SMC_ENTITY_SIP 2 /* SIP Service calls */
#define SMC_ENTITY_OEM 3 /* OEM Service calls */
#define SMC_ENTITY_STD 4 /* Standard Service calls */
#define SMC_ENTITY_RESERVED 5 /* Reserved for future use */
#define SMC_ENTITY_TRUSTED_APP 48 /* Trusted Application calls */
#define SMC_ENTITY_TRUSTED_OS 50 /* Trusted OS calls */
#define SMC_ENTITY_LOGGING 51 /* Used for secure -> nonsecure logging */
#define SMC_ENTITY_SECURE_MONITOR 60 /* Trusted OS calls internal to secure monitor */
/* FC = Fast call, SC = Standard call */
#define SMC_SC_RESTART_LAST SMC_STDCALL_NR (SMC_ENTITY_SECURE_MONITOR, 0)
#define SMC_SC_NOP SMC_STDCALL_NR (SMC_ENTITY_SECURE_MONITOR, 1)
/*
* Return from secure os to non-secure os with return value in r1
*/
#define SMC_SC_NS_RETURN SMC_STDCALL_NR (SMC_ENTITY_SECURE_MONITOR, 0)
#define SMC_FC_RESERVED SMC_FASTCALL_NR (SMC_ENTITY_SECURE_MONITOR, 0)
#define SMC_FC_FIQ_EXIT SMC_FASTCALL_NR (SMC_ENTITY_SECURE_MONITOR, 1)
#define SMC_FC_REQUEST_FIQ SMC_FASTCALL_NR (SMC_ENTITY_SECURE_MONITOR, 2)
#define SMC_FC_GET_NEXT_IRQ SMC_FASTCALL_NR (SMC_ENTITY_SECURE_MONITOR, 3)
#define SMC_FC_FIQ_ENTER SMC_FASTCALL_NR (SMC_ENTITY_SECURE_MONITOR, 4)
#define SMC_FC64_SET_FIQ_HANDLER SMC_FASTCALL64_NR(SMC_ENTITY_SECURE_MONITOR, 5)
#define SMC_FC64_GET_FIQ_REGS SMC_FASTCALL64_NR (SMC_ENTITY_SECURE_MONITOR, 6)
#define SMC_FC_CPU_SUSPEND SMC_FASTCALL_NR (SMC_ENTITY_SECURE_MONITOR, 7)
#define SMC_FC_CPU_RESUME SMC_FASTCALL_NR (SMC_ENTITY_SECURE_MONITOR, 8)
#define SMC_FC_AARCH_SWITCH SMC_FASTCALL_NR (SMC_ENTITY_SECURE_MONITOR, 9)
#define SMC_FC_GET_VERSION_STR SMC_FASTCALL_NR (SMC_ENTITY_SECURE_MONITOR, 10)
/* Trusted OS entity calls */
#define SMC_SC_VIRTIO_GET_DESCR SMC_STDCALL_NR(SMC_ENTITY_TRUSTED_OS, 20)
#define SMC_SC_VIRTIO_START SMC_STDCALL_NR(SMC_ENTITY_TRUSTED_OS, 21)
#define SMC_SC_VIRTIO_STOP SMC_STDCALL_NR(SMC_ENTITY_TRUSTED_OS, 22)
#define SMC_SC_VDEV_RESET SMC_STDCALL_NR(SMC_ENTITY_TRUSTED_OS, 23)
#define SMC_SC_VDEV_KICK_VQ SMC_STDCALL_NR(SMC_ENTITY_TRUSTED_OS, 24)
#endif /* __LIB_SM_SMCALL_H */

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/*
* Copyright (c) 2016, 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:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <assert.h>
#include <bl_common.h>
#include <bl31.h>
#include <context_mgmt.h>
#include <debug.h>
#include <interrupt_mgmt.h>
#include <platform.h>
#include <runtime_svc.h>
#include <string.h>
#include "smcall.h"
#include "sm_err.h"
struct trusty_stack {
uint8_t space[PLATFORM_STACK_SIZE] __aligned(16);
};
struct trusty_cpu_ctx {
cpu_context_t cpu_ctx;
void *saved_sp;
uint32_t saved_security_state;
int fiq_handler_active;
uint64_t fiq_handler_pc;
uint64_t fiq_handler_cpsr;
uint64_t fiq_handler_sp;
uint64_t fiq_pc;
uint64_t fiq_cpsr;
uint64_t fiq_sp_el1;
gp_regs_t fiq_gpregs;
struct trusty_stack secure_stack;
};
struct args {
uint64_t r0;
uint64_t r1;
uint64_t r2;
uint64_t r3;
};
struct trusty_cpu_ctx trusty_cpu_ctx[PLATFORM_CORE_COUNT];
struct args trusty_init_context_stack(void **sp, void *new_stack);
struct args trusty_context_switch_helper(void **sp, uint64_t r0, uint64_t r1,
uint64_t r2, uint64_t r3);
static struct trusty_cpu_ctx *get_trusty_ctx(void)
{
return &trusty_cpu_ctx[plat_my_core_pos()];
}
static struct args trusty_context_switch(uint32_t security_state, uint64_t r0,
uint64_t r1, uint64_t r2, uint64_t r3)
{
struct args ret;
struct trusty_cpu_ctx *ctx = get_trusty_ctx();
assert(ctx->saved_security_state != security_state);
cm_el1_sysregs_context_save(security_state);
ctx->saved_security_state = security_state;
ret = trusty_context_switch_helper(&ctx->saved_sp, r0, r1, r2, r3);
assert(ctx->saved_security_state == !security_state);
cm_el1_sysregs_context_restore(security_state);
cm_set_next_eret_context(security_state);
return ret;
}
static uint64_t trusty_fiq_handler(uint32_t id,
uint32_t flags,
void *handle,
void *cookie)
{
struct args ret;
struct trusty_cpu_ctx *ctx = get_trusty_ctx();
assert(!is_caller_secure(flags));
ret = trusty_context_switch(NON_SECURE, SMC_FC_FIQ_ENTER, 0, 0, 0);
if (ret.r0) {
SMC_RET0(handle);
}
if (ctx->fiq_handler_active) {
INFO("%s: fiq handler already active\n", __func__);
SMC_RET0(handle);
}
ctx->fiq_handler_active = 1;
memcpy(&ctx->fiq_gpregs, get_gpregs_ctx(handle), sizeof(ctx->fiq_gpregs));
ctx->fiq_pc = SMC_GET_EL3(handle, CTX_ELR_EL3);
ctx->fiq_cpsr = SMC_GET_EL3(handle, CTX_SPSR_EL3);
ctx->fiq_sp_el1 = read_ctx_reg(get_sysregs_ctx(handle), CTX_SP_EL1);
write_ctx_reg(get_sysregs_ctx(handle), CTX_SP_EL1, ctx->fiq_handler_sp);
cm_set_elr_spsr_el3(NON_SECURE, ctx->fiq_handler_pc, ctx->fiq_handler_cpsr);
SMC_RET0(handle);
}
static uint64_t trusty_set_fiq_handler(void *handle, uint64_t cpu,
uint64_t handler, uint64_t stack)
{
struct trusty_cpu_ctx *ctx;
if (cpu >= PLATFORM_CORE_COUNT) {
ERROR("%s: cpu %ld >= %d\n", __func__, cpu, PLATFORM_CORE_COUNT);
return SM_ERR_INVALID_PARAMETERS;
}
ctx = &trusty_cpu_ctx[cpu];
ctx->fiq_handler_pc = handler;
ctx->fiq_handler_cpsr = SMC_GET_EL3(handle, CTX_SPSR_EL3);
ctx->fiq_handler_sp = stack;
SMC_RET1(handle, 0);
}
static uint64_t trusty_get_fiq_regs(void *handle)
{
struct trusty_cpu_ctx *ctx = get_trusty_ctx();
uint64_t sp_el0 = read_ctx_reg(&ctx->fiq_gpregs, CTX_GPREG_SP_EL0);
SMC_RET4(handle, ctx->fiq_pc, ctx->fiq_cpsr, sp_el0, ctx->fiq_sp_el1);
}
static uint64_t trusty_fiq_exit(void *handle, uint64_t x1, uint64_t x2, uint64_t x3)
{
struct args ret;
struct trusty_cpu_ctx *ctx = get_trusty_ctx();
if (!ctx->fiq_handler_active) {
NOTICE("%s: fiq handler not active\n", __func__);
SMC_RET1(handle, SM_ERR_INVALID_PARAMETERS);
}
ret = trusty_context_switch(NON_SECURE, SMC_FC_FIQ_EXIT, 0, 0, 0);
if (ret.r0 != 1) {
INFO("%s(%p) SMC_FC_FIQ_EXIT returned unexpected value, %ld\n",
__func__, handle, ret.r0);
}
/*
* Restore register state to state recorded on fiq entry.
*
* x0, sp_el1, pc and cpsr need to be restored because el1 cannot
* restore them.
*
* x1-x4 and x8-x17 need to be restored here because smc_handler64
* corrupts them (el1 code also restored them).
*/
memcpy(get_gpregs_ctx(handle), &ctx->fiq_gpregs, sizeof(ctx->fiq_gpregs));
ctx->fiq_handler_active = 0;
write_ctx_reg(get_sysregs_ctx(handle), CTX_SP_EL1, ctx->fiq_sp_el1);
cm_set_elr_spsr_el3(NON_SECURE, ctx->fiq_pc, ctx->fiq_cpsr);
SMC_RET0(handle);
}
static uint64_t trusty_smc_handler(uint32_t smc_fid,
uint64_t x1,
uint64_t x2,
uint64_t x3,
uint64_t x4,
void *cookie,
void *handle,
uint64_t flags)
{
struct args ret;
if (is_caller_secure(flags)) {
if (smc_fid == SMC_SC_NS_RETURN) {
ret = trusty_context_switch(SECURE, x1, 0, 0, 0);
SMC_RET4(handle, ret.r0, ret.r1, ret.r2, ret.r3);
}
INFO("%s (0x%x, 0x%lx, 0x%lx, 0x%lx, 0x%lx, %p, %p, 0x%lx) \
cpu %d, unknown smc\n",
__func__, smc_fid, x1, x2, x3, x4, cookie, handle, flags,
plat_my_core_pos());
SMC_RET1(handle, SMC_UNK);
} else {
switch (smc_fid) {
case SMC_FC64_SET_FIQ_HANDLER:
return trusty_set_fiq_handler(handle, x1, x2, x3);
case SMC_FC64_GET_FIQ_REGS:
return trusty_get_fiq_regs(handle);
case SMC_FC_FIQ_EXIT:
return trusty_fiq_exit(handle, x1, x2, x3);
default:
ret = trusty_context_switch(NON_SECURE, smc_fid, x1,
x2, x3);
SMC_RET1(handle, ret.r0);
}
}
}
static int32_t trusty_init(void)
{
void el3_exit();
entry_point_info_t *ep_info;
struct trusty_cpu_ctx *ctx = get_trusty_ctx();
uint32_t cpu = plat_my_core_pos();
int reg_width = GET_RW(read_ctx_reg(get_el3state_ctx(&ctx->cpu_ctx),
CTX_SPSR_EL3));
ep_info = bl31_plat_get_next_image_ep_info(SECURE);
cm_el1_sysregs_context_save(NON_SECURE);
cm_set_context(&ctx->cpu_ctx, SECURE);
cm_init_my_context(ep_info);
/*
* Adjust secondary cpu entry point for 32 bit images to the
* end of exeption vectors
*/
if ((cpu != 0) && (reg_width == MODE_RW_32)) {
INFO("trusty: cpu %d, adjust entry point to 0x%lx\n",
cpu, ep_info->pc + (1U << 5));
cm_set_elr_el3(SECURE, ep_info->pc + (1U << 5));
}
cm_el1_sysregs_context_restore(SECURE);
cm_set_next_eret_context(SECURE);
ctx->saved_security_state = ~0; /* initial saved state is invalid */
trusty_init_context_stack(&ctx->saved_sp, &ctx->secure_stack);
trusty_context_switch_helper(&ctx->saved_sp, 0, 0, 0, 0);
cm_el1_sysregs_context_restore(NON_SECURE);
cm_set_next_eret_context(NON_SECURE);
return 0;
}
static void trusty_cpu_suspend(void)
{
struct args ret;
unsigned int linear_id = plat_my_core_pos();
ret = trusty_context_switch(NON_SECURE, SMC_FC_CPU_SUSPEND, 0, 0, 0);
if (ret.r0 != 0) {
INFO("%s: cpu %d, SMC_FC_CPU_SUSPEND returned unexpected value, %ld\n",
__func__, linear_id, ret.r0);
}
}
static void trusty_cpu_resume(void)
{
struct args ret;
unsigned int linear_id = plat_my_core_pos();
ret = trusty_context_switch(NON_SECURE, SMC_FC_CPU_RESUME, 0, 0, 0);
if (ret.r0 != 0) {
INFO("%s: cpu %d, SMC_FC_CPU_RESUME returned unexpected value, %ld\n",
__func__, linear_id, ret.r0);
}
}
static int32_t trusty_cpu_off_handler(uint64_t unused)
{
trusty_cpu_suspend();
return 0;
}
static void trusty_cpu_on_finish_handler(uint64_t unused)
{
struct trusty_cpu_ctx *ctx = get_trusty_ctx();
if (!ctx->saved_sp) {
trusty_init();
} else {
trusty_cpu_resume();
}
}
static void trusty_cpu_suspend_handler(uint64_t unused)
{
trusty_cpu_suspend();
}
static void trusty_cpu_suspend_finish_handler(uint64_t unused)
{
trusty_cpu_resume();
}
static const spd_pm_ops_t trusty_pm = {
.svc_off = trusty_cpu_off_handler,
.svc_suspend = trusty_cpu_suspend_handler,
.svc_on_finish = trusty_cpu_on_finish_handler,
.svc_suspend_finish = trusty_cpu_suspend_finish_handler,
};
static int32_t trusty_setup(void)
{
entry_point_info_t *ep_info;
uint32_t instr;
uint32_t flags;
int ret;
int aarch32 = 0;
ep_info = bl31_plat_get_next_image_ep_info(SECURE);
if (!ep_info) {
INFO("Trusty image missing.\n");
return -1;
}
instr = *(uint32_t *)ep_info->pc;
if (instr >> 24 == 0xea) {
INFO("trusty: Found 32 bit image\n");
aarch32 = 1;
} else if (instr >> 8 == 0xd53810) {
INFO("trusty: Found 64 bit image\n");
} else {
INFO("trusty: Found unknown image, 0x%x\n", instr);
}
SET_PARAM_HEAD(ep_info, PARAM_EP, VERSION_1, SECURE | EP_ST_ENABLE);
if (!aarch32)
ep_info->spsr = SPSR_64(MODE_EL1, MODE_SP_ELX,
DISABLE_ALL_EXCEPTIONS);
else
ep_info->spsr = SPSR_MODE32(MODE32_svc, SPSR_T_ARM,
SPSR_E_LITTLE,
DAIF_FIQ_BIT |
DAIF_IRQ_BIT |
DAIF_ABT_BIT);
bl31_register_bl32_init(trusty_init);
psci_register_spd_pm_hook(&trusty_pm);
flags = 0;
set_interrupt_rm_flag(flags, NON_SECURE);
ret = register_interrupt_type_handler(INTR_TYPE_S_EL1,
trusty_fiq_handler,
flags);
if (ret)
ERROR("trusty: failed to register fiq handler, ret = %d\n", ret);
return 0;
}
/* Define a SPD runtime service descriptor for fast SMC calls */
DECLARE_RT_SVC(
trusty_fast,
OEN_TOS_START,
SMC_ENTITY_SECURE_MONITOR,
SMC_TYPE_FAST,
trusty_setup,
trusty_smc_handler
);
/* Define a SPD runtime service descriptor for standard SMC calls */
DECLARE_RT_SVC(
trusty_std,
OEN_TOS_START,
SMC_ENTITY_SECURE_MONITOR,
SMC_TYPE_STD,
NULL,
trusty_smc_handler
);

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#
# Copyright (c) 2016, 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:
#
# Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#
# Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# Neither the name of ARM nor the names of its contributors may be used
# to endorse or promote products derived from this software without specific
# prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
SPD_INCLUDES :=
SPD_SOURCES := services/spd/trusty/trusty.c \
services/spd/trusty/trusty_helpers.S

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/*
* Copyright (c) 2016, 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:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <asm_macros.S>
.macro push ra, rb, sp=sp
stp \ra, \rb, [\sp,#-16]!
.endm
.macro pop ra, rb, sp=sp
ldp \ra, \rb, [\sp], #16
.endm
.global trusty_context_switch_helper
func trusty_context_switch_helper
push x8, xzr
push x19, x20
push x21, x22
push x23, x24
push x25, x26
push x27, x28
push x29, x30
mov x9, sp
ldr x10, [x0]
mov sp, x10
str x9, [x0]
pop x29, x30
pop x27, x28
pop x25, x26
pop x23, x24
pop x21, x22
pop x19, x20
pop x8, xzr
stp x1, x2, [x8]
stp x3, x4, [x8, #16]
ret
endfunc trusty_context_switch_helper
.global trusty_init_context_stack
func trusty_init_context_stack
push x8, xzr, x1
push xzr, xzr, x1
push xzr, xzr, x1
push xzr, xzr, x1
push xzr, xzr, x1
push xzr, xzr, x1
adr x9, el3_exit
push xzr, x9, x1
str x1, [x0]
ret
endfunc trusty_init_context_stack