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/*
* Copyright (c) 2014, 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 <debug.h>
#include <psci.h>
#include <runtime_svc.h>
#include <std_svc.h>
#include <stdint.h>
#include <uuid.h>
#include <assert.h>
#include <string.h>
#include <bl_common.h>
#include <context_mgmt.h>
#include <mmio.h>
#define ARM_NUM_CALLS 4
#define ARM_SVC_CALL_COUNT 0x8000ff00
#define ARM_SVC_UID 0x8000ff01
//0x8000ff02 reserved
#define ARM_SVC_VERSION 0x8000ff03
#define ARM_SVC_RUNNSOS 0x8000ff04
/* ARM Standard Service Calls version numbers */
#define ARM_SVC_VERSION_MAJOR 0x0
#define ARM_SVC_VERSION_MINOR 0x1
/* Arm arch Service UUID */
DEFINE_SVC_UUID(arm_svc_uid,
0x83B53A5B, 0xC594, 0x40B9, 0x53, 0x91,
0xF2, 0xFC, 0x54, 0x29, 0x86, 0x48);
/*******************************************************************************
* This function programs EL3 registers and performs other setup to enable entry
* into the next image after BL31 at the next ERET.
******************************************************************************/
void prepare_nonsec_os_entry(uint64_t kernel_addr, uint64_t dtb_addr)
{
entry_point_info_t next_image_info;
uint32_t image_type;
/* Determine which image to execute next */
image_type = NON_SECURE;
/* Program EL3 registers to enable entry into the next EL */
memset(&next_image_info, 0, sizeof(next_image_info));
SET_SECURITY_STATE(next_image_info.h.attr, NON_SECURE);
next_image_info.spsr = SPSR_64(MODE_EL2, MODE_SP_ELX,
DISABLE_ALL_EXCEPTIONS);
next_image_info.pc = kernel_addr;
next_image_info.args.arg0 = dtb_addr;
INFO("BL3-1: Next image address = 0x%llx\n",(unsigned long long) next_image_info.pc);
INFO("BL3-1: Next image spsr = 0x%x\n", next_image_info.spsr);
cm_init_context(read_mpidr_el1(), &next_image_info);
cm_prepare_el3_exit(image_type);
}
/*
* Top-level Standard Service SMC handler. This handler will in turn dispatch
* calls to PSCI SMC handler
*/
uint64_t arm_svc_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)
{
//INFO(" Arm Architechture Service Call: 0x%x \n", smc_fid);
switch (smc_fid) {
case ARM_SVC_CALL_COUNT:
SMC_RET1(handle, ARM_NUM_CALLS);
case ARM_SVC_UID:
/* Return UID to the caller */
SMC_UUID_RET(handle, arm_svc_uid);
case ARM_SVC_VERSION:
/* Return the version of current implementation */
SMC_RET2(handle, ARM_SVC_VERSION_MAJOR, ARM_SVC_VERSION_MINOR);
case ARM_SVC_RUNNSOS:
prepare_nonsec_os_entry((uint32_t)x1,(uint32_t)x2);
SMC_RET0(handle);
default:
WARN("Unimplemented Standard Service Call: 0x%x \n", smc_fid);
SMC_RET1(handle, SMC_UNK);
}
}
/* Register Standard Service Calls as runtime service */
DECLARE_RT_SVC(
arm_svc,
OEN_ARM_START,
OEN_ARM_END,
SMC_TYPE_FAST,
NULL,
arm_svc_smc_handler
);
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