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8b779620d3
In order for the symbol table in the ELF file to contain the size of functions written in assembly, it is necessary to report it to the assembler using the .size directive. To fulfil the above requirements, this patch introduces an 'endfunc' macro which contains the .endfunc and .size directives. It also adds a .func directive to the 'func' assembler macro. The .func/.endfunc have been used so the assembler can fail if endfunc is omitted. Fixes ARM-Software/tf-issues#295 Change-Id: If8cb331b03d7f38fe7e3694d4de26f1075b278fc Signed-off-by: Kévin Petit <kevin.petit@arm.com>
89 lines
3.1 KiB
ArmAsm
89 lines
3.1 KiB
ArmAsm
/*
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* Copyright (c) 2014, ARM Limited and Contributors. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <asm_macros.S>
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#include <cpu_data.h>
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.globl init_cpu_data_ptr
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.globl _cpu_data_by_mpidr
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.globl _cpu_data_by_index
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/* -----------------------------------------------------------------
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* void init_cpu_data_ptr(void)
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*
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* Initialise the TPIDR_EL3 register to refer to the cpu_data_t
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* for the calling CPU. This must be called before cm_get_cpu_data()
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*
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* This can be called without a valid stack.
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* clobbers: x0, x1, x9, x10
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* -----------------------------------------------------------------
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*/
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func init_cpu_data_ptr
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mov x10, x30
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mrs x0, mpidr_el1
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bl _cpu_data_by_mpidr
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msr tpidr_el3, x0
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ret x10
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endfunc init_cpu_data_ptr
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/* -----------------------------------------------------------------
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* cpu_data_t *_cpu_data_by_mpidr(uint64_t mpidr)
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*
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* Return the cpu_data structure for the CPU with given MPIDR
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*
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* This can be called without a valid stack. It assumes that
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* platform_get_core_pos() does not clobber register x9.
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* clobbers: x0, x1, x9
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* -----------------------------------------------------------------
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*/
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func _cpu_data_by_mpidr
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mov x9, x30
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bl platform_get_core_pos
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mov x30, x9
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b _cpu_data_by_index
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endfunc _cpu_data_by_mpidr
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/* -----------------------------------------------------------------
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* cpu_data_t *_cpu_data_by_index(uint32_t cpu_index)
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*
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* Return the cpu_data structure for the CPU with given linear index
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*
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* This can be called without a valid stack.
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* clobbers: x0, x1
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* -----------------------------------------------------------------
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*/
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func _cpu_data_by_index
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adr x1, percpu_data
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add x0, x1, x0, LSL #CPU_DATA_LOG2SIZE
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ret
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endfunc _cpu_data_by_index
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