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plat: imx: common: implement IMX_SIP_AARCH32 

Implement IMX_SIP_AARCH32 to let AArch64 Bootloader could issue
SIP call to switch to AArch32 mode to run OS.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Change-Id: I38b04ef909a6dbfba5ded12a7bb6e799a3935a66
This commit is contained in:
Peng Fan 2020-07-10 14:18:01 +08:00 committed by Peng Fan
parent d95c3de347
commit 4a0ac3e38e
3 changed files with 44 additions and 0 deletions
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36
plat/imx/common/imx_sip_handler.c
View File

@ -4,6 +4,7 @@
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <arch.h>
#include <stdlib.h>
#include <stdint.h>
#include <services/std_svc.h>
@ -12,6 +13,7 @@
#include <common/debug.h>
#include <common/runtime_svc.h>
#include <imx_sip_svc.h>
#include <lib/el3_runtime/context_mgmt.h>
#include <sci/sci.h>
#if defined(PLAT_imx8qm) || defined(PLAT_imx8qx)
@ -185,3 +187,37 @@ uint64_t imx_buildinfo_handler(uint32_t smc_fid,
return ret;
}
int imx_kernel_entry_handler(uint32_t smc_fid,
u_register_t x1,
u_register_t x2,
u_register_t x3,
u_register_t x4)
{
static entry_point_info_t bl33_image_ep_info;
entry_point_info_t *next_image_info;
unsigned int mode;
if (x1 < (PLAT_NS_IMAGE_OFFSET & 0xF0000000))
return SMC_UNK;
mode = MODE32_svc;
next_image_info = &bl33_image_ep_info;
next_image_info->pc = x1;
next_image_info->spsr = SPSR_MODE32(mode, SPSR_T_ARM, SPSR_E_LITTLE,
(DAIF_FIQ_BIT | DAIF_IRQ_BIT | DAIF_ABT_BIT));
next_image_info->args.arg0 = 0;
next_image_info->args.arg1 = 0;
next_image_info->args.arg2 = x3;
SET_SECURITY_STATE(next_image_info->h.attr, NON_SECURE);
cm_init_my_context(next_image_info);
cm_prepare_el3_exit(NON_SECURE);
return 0;
}

3
plat/imx/common/imx_sip_svc.c
View File

@ -26,6 +26,9 @@ static uintptr_t imx_sip_handler(unsigned int smc_fid,
u_register_t flags)
{
switch (smc_fid) {
case IMX_SIP_AARCH32:
SMC_RET1(handle, imx_kernel_entry_handler(smc_fid, x1, x2, x3, x4));
break;
#if defined(PLAT_imx8mq)
case IMX_SIP_GET_SOC_INFO:
SMC_RET1(handle, imx_soc_info_handler(smc_fid, x1, x2, x3));

5
plat/imx/common/include/imx_sip_svc.h
View File

@ -28,6 +28,11 @@
#define IMX_SIP_MISC_SET_TEMP 0xC200000C
#define IMX_SIP_AARCH32 0xC20000FD
int imx_kernel_entry_handler(uint32_t smc_fid, u_register_t x1,
u_register_t x2, u_register_t x3,
u_register_t x4);
#if defined(PLAT_imx8mq)
int imx_soc_info_handler(uint32_t smc_fid, u_register_t x1,
u_register_t x2, u_register_t x3);