mirror of
https://github.com/torvalds/linux.git
synced 2024-12-27 05:11:48 +00:00
c7db4ff5d2
Add macros to enable and disable to manage PSTATE.D for debugging. The macros local_dbg_save and local_dbg_restore are moved to irqflags.h file KGDB boot tests fail because of PSTATE.D is masked. unmask it for debugging support Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
118 lines
2.6 KiB
C
118 lines
2.6 KiB
C
/*
|
|
* Copyright (C) 2012 ARM Ltd.
|
|
*
|
|
* 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 __ASM_IRQFLAGS_H
|
|
#define __ASM_IRQFLAGS_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <asm/ptrace.h>
|
|
|
|
/*
|
|
* CPU interrupt mask handling.
|
|
*/
|
|
static inline unsigned long arch_local_irq_save(void)
|
|
{
|
|
unsigned long flags;
|
|
asm volatile(
|
|
"mrs %0, daif // arch_local_irq_save\n"
|
|
"msr daifset, #2"
|
|
: "=r" (flags)
|
|
:
|
|
: "memory");
|
|
return flags;
|
|
}
|
|
|
|
static inline void arch_local_irq_enable(void)
|
|
{
|
|
asm volatile(
|
|
"msr daifclr, #2 // arch_local_irq_enable"
|
|
:
|
|
:
|
|
: "memory");
|
|
}
|
|
|
|
static inline void arch_local_irq_disable(void)
|
|
{
|
|
asm volatile(
|
|
"msr daifset, #2 // arch_local_irq_disable"
|
|
:
|
|
:
|
|
: "memory");
|
|
}
|
|
|
|
#define local_fiq_enable() asm("msr daifclr, #1" : : : "memory")
|
|
#define local_fiq_disable() asm("msr daifset, #1" : : : "memory")
|
|
|
|
#define local_async_enable() asm("msr daifclr, #4" : : : "memory")
|
|
#define local_async_disable() asm("msr daifset, #4" : : : "memory")
|
|
|
|
/*
|
|
* Save the current interrupt enable state.
|
|
*/
|
|
static inline unsigned long arch_local_save_flags(void)
|
|
{
|
|
unsigned long flags;
|
|
asm volatile(
|
|
"mrs %0, daif // arch_local_save_flags"
|
|
: "=r" (flags)
|
|
:
|
|
: "memory");
|
|
return flags;
|
|
}
|
|
|
|
/*
|
|
* restore saved IRQ state
|
|
*/
|
|
static inline void arch_local_irq_restore(unsigned long flags)
|
|
{
|
|
asm volatile(
|
|
"msr daif, %0 // arch_local_irq_restore"
|
|
:
|
|
: "r" (flags)
|
|
: "memory");
|
|
}
|
|
|
|
static inline int arch_irqs_disabled_flags(unsigned long flags)
|
|
{
|
|
return flags & PSR_I_BIT;
|
|
}
|
|
|
|
/*
|
|
* save and restore debug state
|
|
*/
|
|
#define local_dbg_save(flags) \
|
|
do { \
|
|
typecheck(unsigned long, flags); \
|
|
asm volatile( \
|
|
"mrs %0, daif // local_dbg_save\n" \
|
|
"msr daifset, #8" \
|
|
: "=r" (flags) : : "memory"); \
|
|
} while (0)
|
|
|
|
#define local_dbg_restore(flags) \
|
|
do { \
|
|
typecheck(unsigned long, flags); \
|
|
asm volatile( \
|
|
"msr daif, %0 // local_dbg_restore\n" \
|
|
: : "r" (flags) : "memory"); \
|
|
} while (0)
|
|
|
|
#define local_dbg_enable() asm("msr daifclr, #8" : : : "memory")
|
|
#define local_dbg_disable() asm("msr daifset, #8" : : : "memory")
|
|
|
|
#endif
|
|
#endif
|