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Tegra186: implement CPU_OFF handler 

This patch implements the CPU_OFF handler for powering down
a CPU using the MCE driver.

Change-Id: I8d455005d0b547cc61cc7778bfe9eb84b7e5480c
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
This commit is contained in:
Varun Wadekar 2016-01-05 15:17:41 -08:00
parent 5d74d68e52
commit 348619f287
1 changed files with 17 additions and 2 deletions
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19
plat/nvidia/tegra/soc/t186/plat_psci_handlers.c
View File

@ -30,6 +30,10 @@
#include <arch.h>
#include <arch_helpers.h>
#include <assert.h>
#include <bl_common.h>
#include <context.h>
#include <context_mgmt.h>
#include <debug.h>
#include <mce.h>
#include <psci.h>
@ -88,11 +92,22 @@ int tegra_soc_prepare_cpu_on_finish(unsigned long mpidr)
int tegra_soc_prepare_cpu_off(unsigned long mpidr)
{
cpu_context_t *ctx = cm_get_context(NON_SECURE);
gp_regs_t *gp_regs = get_gpregs_ctx(ctx);
assert(ctx);
assert(gp_regs);
/* Turn off wake_mask */
mce_command_handler(MCE_CMD_UPDATE_CSTATE_INFO, 0, 0, 1);
write_ctx_reg(gp_regs, CTX_GPREG_X4, 0);
write_ctx_reg(gp_regs, CTX_GPREG_X5, 0);
write_ctx_reg(gp_regs, CTX_GPREG_X6, 1);
mce_command_handler(MCE_CMD_UPDATE_CSTATE_INFO, TEGRA_ARI_CLUSTER_CC7,
0, TEGRA_ARI_SYSTEM_SC7);
/* Turn off CPU */
return mce_command_handler(MCE_CMD_ENTER_CSTATE, ~0, 0, 0);
return mce_command_handler(MCE_CMD_ENTER_CSTATE, TEGRA_ARI_CORE_C7,
~0, 0);
}
__dead2 void tegra_soc_prepare_system_off(void)