mirror of
https://github.com/ARM-software/arm-trusted-firmware.git
synced 2025-05-02 08:49:28 +00:00
6d2c502afb
In i.MX8MM/MQ it is possible to have two copies of bootloader in SD/eMMC and switch between them. The switch is triggered either by the BootROM in case the bootloader image is faulty OR can be enforced by the user, and there is API introduced in9ce232fe("feat(plat/imx8m): add SiP call for secondary boot"), which leverages this SoC feature. However neither i.MX8MP nor i.MX8MN have a dedicated bit which indicates what boot image set is currently booted. According to AN12853 [1] "i.MX ROMs Log Events", it is possible to determine whether fallback event occurred by parsing the BootROM event log. In case ROM event ID 0x51 is present,fallback event did occur and secondary boot image was booted. Knowing which boot image was booted might be useful for reliable bootloader A/B updates, detecting fallback event might be used for making decision if boot firmware rollback is required. This patche introduces implementation, that replicates the same imx_src_handler() behaviour as on i.MX8MM/MQ SoCs. The code is based on original U-Boot implementation [2]. [1]: https://www.nxp.com/webapp/Download?colCode=AN12853 [2]:a5ee05cf71Change-Id: I9a4c5229aa0e53fa23b5261459da99cb3ce6bdbe Signed-off-by: Igor Opaniuk <igor.opaniuk@foundries.io>
91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
/*
|
|
* Copyright (c) 2015-2023, ARM Limited and Contributors. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
#include <common/debug.h>
|
|
#include <common/runtime_svc.h>
|
|
#include <lib/pmf/pmf.h>
|
|
#include <tools_share/uuid.h>
|
|
#include <imx_sip_svc.h>
|
|
|
|
static int32_t imx_sip_setup(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static uintptr_t imx_sip_handler(unsigned int smc_fid,
|
|
u_register_t x1,
|
|
u_register_t x2,
|
|
u_register_t x3,
|
|
u_register_t x4,
|
|
void *cookie,
|
|
void *handle,
|
|
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));
|
|
break;
|
|
case IMX_SIP_GPC:
|
|
SMC_RET1(handle, imx_gpc_handler(smc_fid, x1, x2, x3));
|
|
break;
|
|
case IMX_SIP_DDR_DVFS:
|
|
return dram_dvfs_handler(smc_fid, handle, x1, x2, x3);
|
|
#endif
|
|
#if defined(PLAT_imx8mm) || defined(PLAT_imx8mn) || defined(PLAT_imx8mp)
|
|
case IMX_SIP_DDR_DVFS:
|
|
return dram_dvfs_handler(smc_fid, handle, x1, x2, x3);
|
|
case IMX_SIP_GPC:
|
|
SMC_RET1(handle, imx_gpc_handler(smc_fid, x1, x2, x3));
|
|
break;
|
|
#endif
|
|
#if (defined(PLAT_imx8qm) || defined(PLAT_imx8qx))
|
|
case IMX_SIP_SRTC:
|
|
return imx_srtc_handler(smc_fid, handle, x1, x2, x3, x4);
|
|
case IMX_SIP_CPUFREQ:
|
|
SMC_RET1(handle, imx_cpufreq_handler(smc_fid, x1, x2, x3));
|
|
break;
|
|
case IMX_SIP_WAKEUP_SRC:
|
|
SMC_RET1(handle, imx_wakeup_src_handler(smc_fid, x1, x2, x3));
|
|
case IMX_SIP_OTP_READ:
|
|
case IMX_SIP_OTP_WRITE:
|
|
return imx_otp_handler(smc_fid, handle, x1, x2);
|
|
case IMX_SIP_MISC_SET_TEMP:
|
|
SMC_RET1(handle, imx_misc_set_temp_handler(smc_fid, x1, x2, x3, x4));
|
|
#endif
|
|
#if defined(PLAT_imx8mm) || defined(PLAT_imx8mq) || defined(PLAT_imx8mn) || \
|
|
defined(PLAT_imx8mp)
|
|
case IMX_SIP_SRC:
|
|
SMC_RET1(handle, imx_src_handler(smc_fid, x1, x2, x3, handle));
|
|
break;
|
|
#endif
|
|
#if defined(PLAT_imx8mm) || defined(PLAT_imx8mn) || defined(PLAT_imx8mp)
|
|
case IMX_SIP_HAB:
|
|
SMC_RET1(handle, imx_hab_handler(smc_fid, x1, x2, x3, x4));
|
|
break;
|
|
#endif
|
|
case IMX_SIP_BUILDINFO:
|
|
SMC_RET1(handle, imx_buildinfo_handler(smc_fid, x1, x2, x3, x4));
|
|
default:
|
|
WARN("Unimplemented i.MX SiP Service Call: 0x%x\n", smc_fid);
|
|
SMC_RET1(handle, SMC_UNK);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Define a runtime service descriptor for fast SMC calls */
|
|
DECLARE_RT_SVC(
|
|
imx_sip_svc,
|
|
OEN_SIP_START,
|
|
OEN_SIP_END,
|
|
SMC_TYPE_FAST,
|
|
imx_sip_setup,
|
|
imx_sip_handler
|
|
);
|