/*
* Copyright (c) 2007 Michal Kebrt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup arm32
* @{
*/
/** @file
* @brief Declarations of functions implemented in assembly.
*/
#ifndef KERN_arm32_ASM_H_
#define KERN_arm32_ASM_H_
#include <arch/types.h>
#include <arch/stack.h>
#include <config.h>
#include <arch/interrupt.h>
/** No such instruction on ARM to sleep CPU. */
static inline void cpu_sleep(void)
{
}
/** No I/O port address space on ARM. */
static inline void outb(ioport_t port, uint8_t v)
{
}
/** No I/O port address space on ARM. */
static inline uint8_t inb(ioport_t port)
{
return 0;
}
/** Return base address of current stack.
*
* Return the base address of the current stack.
* The stack is assumed to be STACK_SIZE bytes long.
* The stack must start on page boundary.
*/
static inline uintptr_t get_stack_base(void)
{
uintptr_t v;
asm volatile (
"and %0, sp, %1\n"
: "=r" (v)
: "r" (~(STACK_SIZE - 1))
);
return v;
}
extern void cpu_halt(void);
extern void asm_delay_loop(uint32_t t);
extern void userspace_asm(uintptr_t ustack, uintptr_t uspace_uarg,
uintptr_t entry);
#endif
/** @}
*/