/*
* Copyright (C) 2005 Jakub Jermar
* 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.
*/
#ifndef __sparc64_ASM_H__
#define __sparc64_ASM_H__
#include <typedefs.h>
#include <arch/types.h>
#include <arch/register.h>
#include <config.h>
/** Read Processor State register.
*
* @return Value of PSTATE register.
*/
static inline __u64 pstate_read(void)
{
__u64 v;
__asm__ volatile ("rdpr %%pstate, %0\n" : "=r" (v));
return v;
}
/** Write Processor State register.
*
* @param New value of PSTATE register.
*/
static inline void pstate_write(__u64 v)
{
__asm__ volatile ("wrpr %0, %1, %%pstate\n" : : "r" (v), "i" (0));
}
/** Read TICK_compare Register.
*
* @return Value of TICK_comapre register.
*/
static inline __u64 tick_compare_read(void)
{
__u64 v;
__asm__ volatile ("rd %%tick_cmpr, %0\n" : "=r" (v));
return v;
}
/** Write TICK_compare Register.
*
* @param New value of TICK_comapre register.
*/
static inline void tick_compare_write(__u64 v)
{
__asm__ volatile ("wr %0, %1, %%tick_cmpr\n" : : "r" (v), "i" (0));
}
/** Read TICK Register.
*
* @return Value of TICK register.
*/
static inline __u64 tick_read(void)
{
__u64 v;
__asm__ volatile ("rdpr %%tick, %0\n" : "=r" (v));
return v;
}
/** Write TICK Register.
*
* @param New value of TICK register.
*/
static inline void tick_write(__u64 v)
{
__asm__ volatile ("wrpr %0, %1, %%tick\n" : : "r" (v), "i" (0));
}
/** Enable interrupts.
*
* Enable interrupts and return previous
* value of IPL.
*
* @return Old interrupt priority level.
*/
static inline ipl_t interrupts_enable(void) {
pstate_reg_t pstate;
__u64 value;
value = pstate_read();
pstate.value = value;
pstate.ie = true;
pstate_write(pstate.value);
return (ipl_t) value;
}
/** Disable interrupts.
*
* Disable interrupts and return previous
* value of IPL.
*
* @return Old interrupt priority level.
*/
static inline ipl_t interrupts_disable(void) {
pstate_reg_t pstate;
__u64 value;
value = pstate_read();
pstate.value = value;
pstate.ie = false;
pstate_write(pstate.value);
return (ipl_t) value;
}
/** Restore interrupt priority level.
*
* Restore IPL.
*
* @param ipl Saved interrupt priority level.
*/
static inline void interrupts_restore(ipl_t ipl) {
pstate_reg_t pstate;
pstate.value = pstate_read();
pstate.ie = ((pstate_reg_t) ipl).ie;
pstate_write(pstate.value);
}
/** Return interrupt priority level.
*
* Return IPL.
*
* @return Current interrupt priority level.
*/
static inline ipl_t interrupts_read(void) {
return (ipl_t) pstate_read();
}
/** 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 __address get_stack_base(void)
{
__address v;
__asm__ volatile ("and %%sp, %1, %0\n" : "=r" (v) : "r" (~(STACK_SIZE-1)));
return v;
}
/** Read Version Register.
*
* @return Value of VER register.
*/
static inline __u64 ver_read(void)
{
__u64 v;
__asm__ volatile ("rdpr %%ver, %0\n" : "=r" (v));
return v;
}
/** Read Trap Base Address register.
*
* @return Current value in TBA.
*/
static inline __u64 tba_read(void)
{
__u64 v;
__asm__ volatile ("rdpr %%tba, %0\n" : "=r" (v));
return v;
}
/** Write Trap Base Address register.
*
* @param New value of TBA.
*/
static inline void tba_write(__u64 v)
{
__asm__ volatile ("wrpr %0, %1, %%tba\n" : : "r" (v), "i" (0));
}
/** Load __u64 from alternate space.
*
* @param asi ASI determining the alternate space.
* @param va Virtual address within the ASI.
*
* @return Value read from the virtual address in the specified address space.
*/
static inline __u64 asi_u64_read(asi_t asi, __address va)
{
__u64 v;
__asm__ volatile ("ldxa [%1] %2, %0\n" : "=r" (v) : "r" (va), "i" (asi));
return v;
}
/** Store __u64 to alternate space.
*
* @param asi ASI determining the alternate space.
* @param va Virtual address within the ASI.
* @param v Value to be written.
*/
static inline void asi_u64_write(asi_t asi, __address va, __u64 v)
{
__asm__ volatile ("stxa %0, [%1] %2\n" : : "r" (v), "r" (va), "i" (asi) : "memory");
}
void cpu_halt(void);
void cpu_sleep(void);
void asm_delay_loop(__u32 t);
#endif