980d6a5511
Until now we've been using memory beyond psci_text_end as stack space
for the secure monitor or PSCI implementation, even if space was not
allocated for it.
This was partially fixed in ("ARM: allocate extra space for PSCI stack
in secure section during link phase"). However, calculating stack space
from psci_text_end in one place, while allocating the space in another
is error prone.
This patch adds a separate empty secure stack section, with space for
CONFIG_ARMV7_PSCI_NR_CPUS stacks, each 1 KB. There's also
__secure_stack_start and __secure_stack_end symbols. The linker script
handles calculating the correct VMAs for the stack section. For
platforms that relocate/copy the secure monitor before using it, the
space is not allocated in the executable, saving space.
For platforms that do not define CONFIG_ARMV7_PSCI_NR_CPUS, a whole page
of stack space for 4 CPUs is allocated, matching the previous behavior.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
66 lines
2.2 KiB
C
66 lines
2.2 KiB
C
/*
|
|
* Copyright (C) 2013 - ARM Ltd
|
|
* Author: Marc Zyngier <marc.zyngier@arm.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef __ARM_PSCI_H__
|
|
#define __ARM_PSCI_H__
|
|
|
|
/* PSCI 0.1 interface */
|
|
#define ARM_PSCI_FN_BASE 0x95c1ba5e
|
|
#define ARM_PSCI_FN(n) (ARM_PSCI_FN_BASE + (n))
|
|
|
|
#define ARM_PSCI_FN_CPU_SUSPEND ARM_PSCI_FN(0)
|
|
#define ARM_PSCI_FN_CPU_OFF ARM_PSCI_FN(1)
|
|
#define ARM_PSCI_FN_CPU_ON ARM_PSCI_FN(2)
|
|
#define ARM_PSCI_FN_MIGRATE ARM_PSCI_FN(3)
|
|
|
|
#define ARM_PSCI_RET_SUCCESS 0
|
|
#define ARM_PSCI_RET_NI (-1)
|
|
#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)
|
|
|
|
/* 1KB stack per core */
|
|
#define ARM_PSCI_STACK_SHIFT 10
|
|
#define ARM_PSCI_STACK_SIZE (1 << ARM_PSCI_STACK_SHIFT)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <asm/types.h>
|
|
|
|
void psci_cpu_entry(void);
|
|
u32 psci_get_cpu_id(void);
|
|
u32 psci_get_cpu_stack_top(int cpu);
|
|
void psci_cpu_off_common(void);
|
|
|
|
int psci_update_dt(void *fdt);
|
|
void psci_board_init(void);
|
|
#endif /* ! __ASSEMBLY__ */
|
|
|
|
#endif /* __ARM_PSCI_H__ */
|