diff options
Diffstat (limited to 'plat/nvidia/tegra/soc/t186/plat_sip_calls.c')
| -rw-r--r-- | plat/nvidia/tegra/soc/t186/plat_sip_calls.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/plat/nvidia/tegra/soc/t186/plat_sip_calls.c b/plat/nvidia/tegra/soc/t186/plat_sip_calls.c index 8b340a19..fabab018 100644 --- a/plat/nvidia/tegra/soc/t186/plat_sip_calls.c +++ b/plat/nvidia/tegra/soc/t186/plat_sip_calls.c @@ -41,10 +41,13 @@ #include <t18x_ari.h> #include <tegra_private.h> +extern uint32_t tegra186_system_powerdn_state; + /******************************************************************************* * Tegra186 SiP SMCs ******************************************************************************/ #define TEGRA_SIP_NEW_VIDEOMEM_REGION 0x82000003 +#define TEGRA_SIP_SYSTEM_SHUTDOWN_STATE 0x82FFFE01 #define TEGRA_SIP_MCE_CMD_ENTER_CSTATE 0x82FFFF00 #define TEGRA_SIP_MCE_CMD_UPDATE_CSTATE_INFO 0x82FFFF01 #define TEGRA_SIP_MCE_CMD_UPDATE_CROSSOVER_TIME 0x82FFFF02 @@ -133,6 +136,33 @@ int plat_sip_handler(uint32_t smc_fid, return 0; + case TEGRA_SIP_SYSTEM_SHUTDOWN_STATE: + + /* clean up the high bits */ + x1 = (uint32_t)x1; + + /* + * SC8 is a special Tegra186 system state where the CPUs and + * DRAM are powered down but the other subsystem is still + * alive. + */ + if ((x1 == TEGRA_ARI_SYSTEM_SC8) || + (x1 == TEGRA_ARI_MISC_CCPLEX_SHUTDOWN_POWER_OFF)) { + + tegra186_system_powerdn_state = x1; + flush_dcache_range( + (uintptr_t)&tegra186_system_powerdn_state, + sizeof(tegra186_system_powerdn_state)); + + } else { + + ERROR("%s: unhandled powerdn state (%d)\n", __func__, + (uint32_t)x1); + return -ENOTSUP; + } + + return 0; + default: break; } |