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arm: implement generic PSCI reset call for armv8

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Add a psci_system_reset() which calls the SYSTEM_RESET function of
PSCI 0.2 and can be used by boards that support it to implement
reset_cpu().

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Beniamino Galvani
2016-05-08 08:30:14 +02:00
committed by Tom Rini
parent 20898ea934
commit 5a07abb370
3 changed files with 34 additions and 1 deletions
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arch/arm/include/asm/psci.h
+16 -1
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@@ -18,7 +18,7 @@
#ifndef __ARM_PSCI_H__
#define __ARM_PSCI_H__
/* PSCI interface */
/* PSCI 0.1 interface */
#define ARM_PSCI_FN_BASE 0x95c1ba5e
#define ARM_PSCI_FN(n) (ARM_PSCI_FN_BASE + (n))
@@ -32,6 +32,21 @@
#define ARM_PSCI_RET_INVAL (-2)
#define ARM_PSCI_RET_DENIED (-3)
/* PSCI 0.2 interface */
#define ARM_PSCI_0_2_FN_BASE 0x84000000
#define ARM_PSCI_0_2_FN(n) (ARM_PSCI_0_2_FN_BASE + (n))
#define ARM_PSCI_0_2_FN_PSCI_VERSION ARM_PSCI_0_2_FN(0)
#define ARM_PSCI_0_2_FN_CPU_SUSPEND ARM_PSCI_0_2_FN(1)
#define ARM_PSCI_0_2_FN_CPU_OFF ARM_PSCI_0_2_FN(2)
#define ARM_PSCI_0_2_FN_CPU_ON ARM_PSCI_0_2_FN(3)
#define ARM_PSCI_0_2_FN_AFFINITY_INFO ARM_PSCI_0_2_FN(4)
#define ARM_PSCI_0_2_FN_MIGRATE ARM_PSCI_0_2_FN(5)
#define ARM_PSCI_0_2_FN_MIGRATE_INFO_TYPE ARM_PSCI_0_2_FN(6)
#define ARM_PSCI_0_2_FN_MIGRATE_INFO_UP_CPU ARM_PSCI_0_2_FN(7)
#define ARM_PSCI_0_2_FN_SYSTEM_OFF ARM_PSCI_0_2_FN(8)
#define ARM_PSCI_0_2_FN_SYSTEM_RESET ARM_PSCI_0_2_FN(9)
#ifndef __ASSEMBLY__
int psci_update_dt(void *fdt);
void psci_board_init(void);