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/*
* Copyright (c) 2014, ARM Limited and Contributors. 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.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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.
*/
#include <asm_macros.S>
#include <cpu_data.h>
.globl init_cpu_data_ptr
.globl _cpu_data_by_mpidr
.globl _cpu_data_by_index
/* -----------------------------------------------------------------
* void init_cpu_data_ptr(void)
*
* Initialise the TPIDR_EL3 register to refer to the cpu_data_t
* for the calling CPU. This must be called before cm_get_cpu_data()
*
* This can be called without a valid stack.
* clobbers: x0, x1, x9, x10
* -----------------------------------------------------------------
*/
func init_cpu_data_ptr
mov x10, x30
mrs x0, mpidr_el1
bl _cpu_data_by_mpidr
msr tpidr_el3, x0
ret x10
endfunc init_cpu_data_ptr
/* -----------------------------------------------------------------
* cpu_data_t *_cpu_data_by_mpidr(uint64_t mpidr)
*
* Return the cpu_data structure for the CPU with given MPIDR
*
* This can be called without a valid stack. It assumes that
* platform_get_core_pos() does not clobber register x9.
* clobbers: x0, x1, x9
* -----------------------------------------------------------------
*/
func _cpu_data_by_mpidr
mov x9, x30
bl platform_get_core_pos
mov x30, x9
b _cpu_data_by_index
endfunc _cpu_data_by_mpidr
/* -----------------------------------------------------------------
* cpu_data_t *_cpu_data_by_index(uint32_t cpu_index)
*
* Return the cpu_data structure for the CPU with given linear index
*
* This can be called without a valid stack.
* clobbers: x0, x1
* -----------------------------------------------------------------
*/
func _cpu_data_by_index
adr x1, percpu_data
add x0, x1, x0, LSL #CPU_DATA_LOG2SIZE
ret
endfunc _cpu_data_by_index