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https://github.com/ARM-software/arm-trusted-firmware.git
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82cb2c1ad9
To make software license auditing simpler, use SPDX[0] license identifiers instead of duplicating the license text in every file. NOTE: Files that have been imported by FreeBSD have not been modified. [0]: https://spdx.org/ Change-Id: I80a00e1f641b8cc075ca5a95b10607ed9ed8761a Signed-off-by: dp-arm <dimitris.papastamos@arm.com>
227 lines
5.5 KiB
ArmAsm
227 lines
5.5 KiB
ArmAsm
/*
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* Copyright (c) 2014-2017, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef __CPU_MACROS_S__
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#define __CPU_MACROS_S__
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#include <arch.h>
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#include <errata_report.h>
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#define CPU_IMPL_PN_MASK (MIDR_IMPL_MASK << MIDR_IMPL_SHIFT) | \
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(MIDR_PN_MASK << MIDR_PN_SHIFT)
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/* The number of CPU operations allowed */
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#define CPU_MAX_PWR_DWN_OPS 2
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/* Special constant to specify that CPU has no reset function */
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#define CPU_NO_RESET_FUNC 0
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/* Word size for 64-bit CPUs */
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#define CPU_WORD_SIZE 8
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/*
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* Whether errata status needs reporting. Errata status is printed in debug
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* builds for both BL1 and BL31 images.
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*/
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#if (defined(IMAGE_BL1) || defined(IMAGE_BL31)) && DEBUG
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# define REPORT_ERRATA 1
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#else
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# define REPORT_ERRATA 0
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#endif
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/*
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* Define the offsets to the fields in cpu_ops structure.
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*/
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.struct 0
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CPU_MIDR: /* cpu_ops midr */
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.space 8
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/* Reset fn is needed in BL at reset vector */
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#if defined(IMAGE_BL1) || defined(IMAGE_BL31)
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CPU_RESET_FUNC: /* cpu_ops reset_func */
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.space 8
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#endif
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#ifdef IMAGE_BL31 /* The power down core and cluster is needed only in BL31 */
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CPU_PWR_DWN_OPS: /* cpu_ops power down functions */
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.space (8 * CPU_MAX_PWR_DWN_OPS)
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#endif
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/*
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* Fields required to print errata status. Only in BL31 that the printing
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* require mutual exclusion and printed flag.
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*/
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#if REPORT_ERRATA
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CPU_ERRATA_FUNC:
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.space 8
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#ifdef IMAGE_BL31
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CPU_ERRATA_LOCK:
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.space 8
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CPU_ERRATA_PRINTED:
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.space 8
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#endif
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#endif
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#if defined(IMAGE_BL31) && CRASH_REPORTING
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CPU_REG_DUMP: /* cpu specific register dump for crash reporting */
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.space 8
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#endif
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CPU_OPS_SIZE = .
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/*
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* Write given expressions as quad words
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*
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* _count:
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* Write at least _count quad words. If the given number of
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* expressions is less than _count, repeat the last expression to
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* fill _count quad words in total
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* _rest:
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* Optional list of expressions. _this is for parameter extraction
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* only, and has no significance to the caller
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*
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* Invoked as:
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* fill_constants 2, foo, bar, blah, ...
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*/
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.macro fill_constants _count:req, _this, _rest:vararg
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.ifgt \_count
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/* Write the current expression */
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.ifb \_this
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.error "Nothing to fill"
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.endif
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.quad \_this
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/* Invoke recursively for remaining expressions */
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.ifnb \_rest
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fill_constants \_count-1, \_rest
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.else
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fill_constants \_count-1, \_this
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.endif
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.endif
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.endm
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/*
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* Declare CPU operations
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*
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* _name:
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* Name of the CPU for which operations are being specified
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* _midr:
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* Numeric value expected to read from CPU's MIDR
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* _resetfunc:
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* Reset function for the CPU. If there's no CPU reset function,
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* specify CPU_NO_RESET_FUNC
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* _power_down_ops:
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* Comma-separated list of functions to perform power-down
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* operatios on the CPU. At least one, and up to
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* CPU_MAX_PWR_DWN_OPS number of functions may be specified.
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* Starting at power level 0, these functions shall handle power
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* down at subsequent power levels. If there aren't exactly
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* CPU_MAX_PWR_DWN_OPS functions, the last specified one will be
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* used to handle power down at subsequent levels
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*/
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.macro declare_cpu_ops _name:req, _midr:req, _resetfunc:req, \
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_power_down_ops:vararg
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.section cpu_ops, "a"
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.align 3
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.type cpu_ops_\_name, %object
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.quad \_midr
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#if defined(IMAGE_BL1) || defined(IMAGE_BL31)
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.quad \_resetfunc
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#endif
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#ifdef IMAGE_BL31
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1:
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/* Insert list of functions */
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fill_constants CPU_MAX_PWR_DWN_OPS, \_power_down_ops
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2:
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/*
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* Error if no or more than CPU_MAX_PWR_DWN_OPS were specified in the
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* list
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*/
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.ifeq 2b - 1b
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.error "At least one power down function must be specified"
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.else
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.iflt 2b - 1b - (CPU_MAX_PWR_DWN_OPS * CPU_WORD_SIZE)
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.error "More than CPU_MAX_PWR_DWN_OPS functions specified"
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.endif
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.endif
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#endif
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#if REPORT_ERRATA
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.ifndef \_name\()_cpu_str
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/*
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* Place errata reported flag, and the spinlock to arbitrate access to
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* it in the data section.
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*/
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.pushsection .data
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define_asm_spinlock \_name\()_errata_lock
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\_name\()_errata_reported:
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.word 0
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.popsection
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/* Place CPU string in rodata */
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.pushsection .rodata
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\_name\()_cpu_str:
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.asciz "\_name"
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.popsection
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.endif
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/*
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* Weakly-bound, optional errata status printing function for CPUs of
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* this class.
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*/
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.weak \_name\()_errata_report
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.quad \_name\()_errata_report
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#ifdef IMAGE_BL31
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/* Pointers to errata lock and reported flag */
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.quad \_name\()_errata_lock
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.quad \_name\()_errata_reported
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#endif
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#endif
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#if defined(IMAGE_BL31) && CRASH_REPORTING
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.quad \_name\()_cpu_reg_dump
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#endif
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.endm
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#if REPORT_ERRATA
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/*
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* Print status of a CPU errata
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*
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* _chosen:
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* Identifier indicating whether or not a CPU errata has been
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* compiled in.
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* _cpu:
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* Name of the CPU
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* _id:
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* Errata identifier
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* _rev_var:
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* Register containing the combined value CPU revision and variant
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* - typically the return value of cpu_get_rev_var
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*/
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.macro report_errata _chosen, _cpu, _id, _rev_var=x8
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/* Stash a string with errata ID */
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.pushsection .rodata
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\_cpu\()_errata_\_id\()_str:
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.asciz "\_id"
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.popsection
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/* Check whether errata applies */
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mov x0, \_rev_var
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bl check_errata_\_id
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.ifeq \_chosen
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/*
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* Errata workaround has not been compiled in. If the errata would have
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* applied had it been compiled in, print its status as missing.
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*/
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cbz x0, 900f
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mov x0, #ERRATA_MISSING
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.endif
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900:
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adr x1, \_cpu\()_cpu_str
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adr x2, \_cpu\()_errata_\_id\()_str
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bl errata_print_msg
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.endm
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#endif
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#endif /* __CPU_MACROS_S__ */
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