arm-trusted-firmware/plat/qti/common/inc/aarch64/plat_macros.S

/*
 * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
 * Copyright (c) 2018,2020, The Linux Foundation. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#ifndef __PLAT_MACROS_S__
#define __PLAT_MACROS_S__

#include <drivers/arm/gic_common.h>
#include <drivers/arm/gicv2.h>
#include <drivers/arm/gicv3.h>

#include <platform_def.h>

.section .rodata.gic_reg_name, "aS"
/* Applicable only to GICv2 and GICv3 with SRE disabled (legacy mode) */
gicc_regs:
	.asciz "gicc_hppir", "gicc_ahppir", "gicc_ctlr", ""

/* Applicable only to GICv3 with SRE enabled */
icc_regs:
	.asciz "icc_hppir0_el1", "icc_hppir1_el1", "icc_ctlr_el3", ""

/* Registers common to both GICv2 and GICv3 */
gicd_pend_reg:
	.asciz "gicd_ispendr regs (Offsets 0x200 - 0x278)\n"	\
		" Offset:\t\t\tvalue\n"
newline:
	.asciz "\n"
spacer:
	.asciz ":\t\t0x"

/** Macro : plat_crash_print_regs
 * This macro allows the crash reporting routine to print GIC registers
 * in case of an unhandled exception in BL31. This aids in debugging and
 * this macro can be defined to be empty in case GIC register reporting is
 * not desired.
 * The below required platform porting macro
 * prints out relevant GIC registers whenever an
 * unhandled exception is taken in BL31.
 * Clobbers: x0 - x10, x26, x27, sp
 * ---------------------------------------------
 */
	.macro plat_crash_print_regs
print_gic_regs:
	ldr	x26, =QTI_GICD_BASE
	ldr	x27, =QTI_GICC_BASE

	/* Check for GICv3 system register access */
	mrs	x7, id_aa64pfr0_el1
	ubfx	x7, x7, #ID_AA64PFR0_GIC_SHIFT, #ID_AA64PFR0_GIC_WIDTH
	cmp	x7, #1
	b.ne	print_gicv2

	/* Check for SRE enable */
	mrs	x8, ICC_SRE_EL3
	tst	x8, #ICC_SRE_SRE_BIT
	b.eq	print_gicv2

	/* Load the icc reg list to x6 */
	adr	x6, icc_regs
	/* Load the icc regs to gp regs used by str_in_crash_buf_print */
	mrs	x8, ICC_HPPIR0_EL1
	mrs	x9, ICC_HPPIR1_EL1
	mrs	x10, ICC_CTLR_EL3
	/* Store to the crash buf and print to console */
	bl	str_in_crash_buf_print
	b	print_gic_common

print_gicv2:
	/* Load the gicc reg list to x6 */
	adr	x6, gicc_regs
	/* Load the gicc regs to gp regs used by str_in_crash_buf_print */
	ldr	w8, [x27, #GICC_HPPIR]
	ldr	w9, [x27, #GICC_AHPPIR]
	ldr	w10, [x27, #GICC_CTLR]
	/* Store to the crash buf and print to console */
	bl	str_in_crash_buf_print

print_gic_common:
	/* Print the GICD_ISPENDR regs */
	add	x7, x26, #GICD_ISPENDR
	adr	x4, gicd_pend_reg
	bl	asm_print_str
gicd_ispendr_loop:
	sub	x4, x7, x26
	cmp	x4, #0x280
	b.eq	exit_print_gic_regs
	bl	asm_print_hex

	adr	x4, spacer
	bl	asm_print_str

	ldr	x4, [x7], #8
	bl	asm_print_hex

	adr	x4, newline
	bl	asm_print_str
	b	gicd_ispendr_loop
exit_print_gic_regs:

	.endm

#endif /* __PLAT_MACROS_S__ */