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/*
* Copyright (c) 2018, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <asm_macros.S>
#include <drivers/arm/pl011.h>
#include <platform_def.h>
.globl platform_get_core_pos
.globl plat_crash_console_init
.globl plat_crash_console_putc
.globl plat_crash_console_flush
/*----------------------------------------------------------------------
* unsigned int platform_get_core_pos(unsigned long mpid)
*
* Function to calculate the core position on sgi platforms.
*
* (ClusterId * SGI_MAX_CPUS_PER_CLUSTER * SGI_MAX_PE_PER_CPU) +
* (CPUId * SGI_MAX_PE_PER_CPU) +
* ThreadId
*
* which can be simplified as:
*
* ((ClusterId * SGI_MAX_CPUS_PER_CLUSTER + CPUId) * SGI_MAX_PE_PER_CPU)
* + ThreadId
* ---------------------------------------------------------------------
*/
func platform_get_core_pos
/*
* Check for MT bit in MPIDR. If not set, shift MPIDR to left to make it
* look as if in a multi-threaded implementation.
*/
tst x0, #MPIDR_MT_MASK
lsl x3, x0, #MPIDR_AFFINITY_BITS
csel x3, x3, x0, eq
/* Extract individual affinity fields from MPIDR */
ubfx x0, x3, #MPIDR_AFF0_SHIFT, #MPIDR_AFFINITY_BITS
ubfx x1, x3, #MPIDR_AFF1_SHIFT, #MPIDR_AFFINITY_BITS
ubfx x2, x3, #MPIDR_AFF2_SHIFT, #MPIDR_AFFINITY_BITS
/* Compute linear position */
mov x3, #SGI_MAX_CPUS_PER_CLUSTER
madd x1, x2, x3, x1
mov x3, #SGI_MAX_PE_PER_CPU
madd x0, x1, x3, x0
ret
endfunc platform_get_core_pos
/* ---------------------------------------------
* int plat_crash_console_init(void)
* Function to initialize the crash console
* without a C Runtime to print crash report.
* Clobber list : x0 - x4
* ---------------------------------------------
*/
func plat_crash_console_init
mov_imm x0, PLAT_ARM_UART_BASE
mov_imm x1, PLAT_ARM_UART_CLK_IN_HZ
mov_imm x2, PL011_BAUDRATE
b console_core_init
endfunc plat_crash_console_init
/* ---------------------------------------------
* int plat_crash_console_putc(int c)
* Function to print a character on the crash
* console without a C Runtime.
* Clobber list : x1, x2
* ---------------------------------------------
*/
func plat_crash_console_putc
mov_imm x1, PLAT_ARM_UART_BASE
b console_core_putc
endfunc plat_crash_console_putc
/* ---------------------------------------------
* int plat_crash_console_flush()
* Function to force a write of all buffered
* data that hasn't been output.
* Out : return -1 on error else return 0.
* Clobber list : r0 - r1
* ---------------------------------------------
*/
func plat_crash_console_flush
mov_imm x1, PLAT_ARM_UART_BASE
b console_core_flush
endfunc plat_crash_console_flush
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