120 lines
3.4 KiB
C
120 lines
3.4 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2012 by Amaury Pouly
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
****************************************************************************/
|
|
#ifndef __HWSTUB_SYSTEM__
|
|
#define __HWSTUB_SYSTEM__
|
|
|
|
#define IRQ_ENABLED 0x00
|
|
#define IRQ_DISABLED 0x80
|
|
#define IRQ_STATUS 0x80
|
|
#define FIQ_ENABLED 0x00
|
|
#define FIQ_DISABLED 0x40
|
|
#define FIQ_STATUS 0x40
|
|
#define IRQ_FIQ_ENABLED 0x00
|
|
#define IRQ_FIQ_DISABLED 0xc0
|
|
#define IRQ_FIQ_STATUS 0xc0
|
|
#define HIGHEST_IRQ_LEVEL IRQ_DISABLED
|
|
|
|
#define set_irq_level(status) \
|
|
set_interrupt_status((status), IRQ_STATUS)
|
|
#define set_fiq_status(status) \
|
|
set_interrupt_status((status), FIQ_STATUS)
|
|
|
|
#define disable_irq_save() \
|
|
disable_interrupt_save(IRQ_STATUS)
|
|
#define disable_fiq_save() \
|
|
disable_interrupt_save(FIQ_STATUS)
|
|
|
|
#define restore_irq(cpsr) \
|
|
restore_interrupt(cpsr)
|
|
#define restore_fiq(cpsr) \
|
|
restore_interrupt(cpsr)
|
|
|
|
#define disable_irq() \
|
|
disable_interrupt(IRQ_STATUS)
|
|
#define enable_irq() \
|
|
enable_interrupt(IRQ_STATUS)
|
|
#define disable_fiq() \
|
|
disable_interrupt(FIQ_STATUS)
|
|
#define enable_fiq() \
|
|
enable_interrupt(FIQ_STATUS)
|
|
|
|
static inline int set_interrupt_status(int status, int mask)
|
|
{
|
|
unsigned long cpsr;
|
|
int oldstatus;
|
|
/* Read the old levels and set the new ones */
|
|
asm volatile (
|
|
"mrs %1, cpsr \n"
|
|
"bic %0, %1, %[mask] \n"
|
|
"orr %0, %0, %2 \n"
|
|
"msr cpsr_c, %0 \n"
|
|
: "=&r,r"(cpsr), "=&r,r"(oldstatus)
|
|
: "r,i"(status & mask), [mask]"i,i"(mask));
|
|
|
|
return oldstatus;
|
|
}
|
|
|
|
static inline void restore_interrupt(int cpsr)
|
|
{
|
|
/* Set cpsr_c from value returned by disable_interrupt_save
|
|
* or set_interrupt_status */
|
|
asm volatile ("msr cpsr_c, %0" : : "r"(cpsr));
|
|
}
|
|
|
|
static inline void enable_interrupt(int mask)
|
|
{
|
|
/* Clear I and/or F disable bit */
|
|
int tmp;
|
|
asm volatile (
|
|
"mrs %0, cpsr \n"
|
|
"bic %0, %0, %1 \n"
|
|
"msr cpsr_c, %0 \n"
|
|
: "=&r"(tmp) : "i"(mask));
|
|
}
|
|
|
|
static inline void disable_interrupt(int mask)
|
|
{
|
|
/* Set I and/or F disable bit */
|
|
int tmp;
|
|
asm volatile (
|
|
"mrs %0, cpsr \n"
|
|
"orr %0, %0, %1 \n"
|
|
"msr cpsr_c, %0 \n"
|
|
: "=&r"(tmp) : "i"(mask));
|
|
}
|
|
|
|
static inline int disable_interrupt_save(int mask)
|
|
{
|
|
/* Set I and/or F disable bit and return old cpsr value */
|
|
int cpsr, tmp;
|
|
asm volatile (
|
|
"mrs %1, cpsr \n"
|
|
"orr %0, %1, %2 \n"
|
|
"msr cpsr_c, %0 \n"
|
|
: "=&r"(tmp), "=&r"(cpsr)
|
|
: "i"(mask));
|
|
return cpsr;
|
|
}
|
|
|
|
int set_data_abort_jmp(void);
|
|
|
|
#endif /* __HWSTUB_SYSTEM__ */
|
|
|