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reset2: Add PSCI system_reset2 function

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This patch implements PSCI_SYSTEM_RESET2 API as defined in PSCI
v1.1 specification. The specification allows architectural and
vendor-specific resets via this API. In the current specification,
there is only one architectural reset, the warm reset. This reset is
intended to provide a fast reboot path that guarantees not to reset
system main memory.

Change-Id: I057bb81a60cd0fe56465dbb5791d8e1cca025bd3
Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>
This commit is contained in:
Roberto Vargas 2017-07-26 09:23:09 +01:00
parent 4d415c11c4
commit 36a8f8fd47
5 changed files with 54 additions and 1 deletions
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12
include/lib/psci/psci.h
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@ -65,6 +65,8 @@
#define PSCI_STAT_RESIDENCY_AARCH64 U(0xc4000010)
#define PSCI_STAT_COUNT_AARCH32 U(0x84000011)
#define PSCI_STAT_COUNT_AARCH64 U(0xc4000011)
#define PSCI_SYSTEM_RESET2_AARCH32 U(0x84000012)
#define PSCI_SYSTEM_RESET2_AARCH64 U(0xc4000012)
#define PSCI_MEM_PROTECT U(0x84000013)
#define PSCI_MEM_CHK_RANGE_AARCH32 U(0x84000014)
#define PSCI_MEM_CHK_RANGE_AARCH64 U(0xc4000014)
@ -167,6 +169,14 @@
#define PSCI_INVALID_MPIDR ~((u_register_t)0)
/*
* SYSTEM_RESET2 macros
*/
#define PSCI_RESET2_TYPE_VENDOR_SHIFT 31
#define PSCI_RESET2_TYPE_VENDOR (1U << PSCI_RESET2_TYPE_VENDOR_SHIFT)
#define PSCI_RESET2_TYPE_ARCH (0U << PSCI_RESET2_TYPE_VENDOR_SHIFT)
#define PSCI_RESET2_SYSTEM_WARM_RESET (PSCI_RESET2_TYPE_ARCH | 0)
#ifndef __ASSEMBLY__
#include <stdint.h>
@ -294,6 +304,8 @@ typedef struct plat_psci_ops {
int (*mem_protect_chk)(uintptr_t base, u_register_t length);
int (*read_mem_protect)(int *val);
int (*write_mem_protect)(int val);
int (*system_reset2)(int is_vendor,
int reset_type, u_register_t cookie);
} plat_psci_ops_t;
/*******************************************************************************