Adding upstream version 2.10.0+dfsg.upstream/2.10.0+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 202 insertions, 0 deletions

diff --git a/common/aarch64/debug.S b/common/aarch64/debug.S
new file mode 100644
index 0000000..8768a1f
--- /dev/null
+++ b/common/aarch64/debug.S
@@ -0,0 +1,202 @@
+/*
+ * Copyright (c) 2014-2023 Arm Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch.h>
+#include <asm_macros.S>
+#include <common/debug.h>
+
+	.globl	asm_print_str
+	.globl	asm_print_hex
+	.globl	asm_print_hex_bits
+	.globl	asm_print_newline
+	.globl	asm_assert
+	.globl	el3_panic
+	.globl	elx_panic
+
+/* Since the max decimal input number is 65536 */
+#define MAX_DEC_DIVISOR		10000
+/* The offset to add to get ascii for numerals '0 - 9' */
+#define ASCII_OFFSET_NUM	0x30
+
+#if ENABLE_ASSERTIONS
+.section .rodata.assert_str, "aS"
+assert_msg1:
+	.asciz "ASSERT: File "
+assert_msg2:
+	.asciz " Line "
+
+	/*
+	 * This macro is intended to be used to print the
+	 * line number in decimal. Used by asm_assert macro.
+	 * The max number expected is 65536.
+	 * In: x4 = the decimal to print.
+	 * Clobber: x30, x0, x1, x2, x5, x6
+	 */
+	.macro asm_print_line_dec
+	mov	x6, #10		/* Divide by 10 after every loop iteration */
+	mov	x5, #MAX_DEC_DIVISOR
+dec_print_loop:
+	udiv	x0, x4, x5			/* Get the quotient */
+	msub	x4, x0, x5, x4			/* Find the remainder */
+	add	x0, x0, #ASCII_OFFSET_NUM	/* Convert to ascii */
+	bl	plat_crash_console_putc
+	udiv	x5, x5, x6			/* Reduce divisor */
+	cbnz	x5, dec_print_loop
+	.endm
+
+
+/* ---------------------------------------------------------------------------
+ * Assertion support in assembly.
+ * The below function helps to support assertions in assembly where we do not
+ * have a C runtime stack. Arguments to the function are :
+ * x0 - File name
+ * x1 - Line no
+ * Clobber list : x30, x0, x1, x2, x3, x4, x5, x6.
+ * ---------------------------------------------------------------------------
+ */
+func asm_assert
+#if LOG_LEVEL >= LOG_LEVEL_INFO
+	/*
+	 * Only print the output if LOG_LEVEL is higher or equal to
+	 * LOG_LEVEL_INFO, which is the default value for builds with DEBUG=1.
+	 */
+	mov	x5, x0
+	mov	x6, x1
+
+	/* Ensure the console is initialized */
+	bl	plat_crash_console_init
+
+	/* Check if the console is initialized */
+	cbz	x0, _assert_loop
+
+	/* The console is initialized */
+	adr	x4, assert_msg1
+	bl	asm_print_str
+	mov	x4, x5
+	bl	asm_print_str
+	adr	x4, assert_msg2
+	bl	asm_print_str
+
+	/* Check if line number higher than max permitted */
+	tst	x6, #~0xffff
+	b.ne	_assert_loop
+	mov	x4, x6
+	asm_print_line_dec
+	bl	plat_crash_console_flush
+_assert_loop:
+#endif /* LOG_LEVEL >= LOG_LEVEL_INFO */
+	no_ret	plat_panic_handler
+endfunc asm_assert
+#endif /* ENABLE_ASSERTIONS */
+
+/*
+ * This function prints a string from address in x4.
+ * In: x4 = pointer to string.
+ * Clobber: x30, x0, x1, x2, x3
+ */
+func asm_print_str
+	mov	x3, x30
+1:
+	ldrb	w0, [x4], #0x1
+	cbz	x0, 2f
+	bl	plat_crash_console_putc
+	b	1b
+2:
+	ret	x3
+endfunc asm_print_str
+
+/*
+ * This function prints a hexadecimal number in x4.
+ * In: x4 = the hexadecimal to print.
+ * Clobber: x30, x0 - x3, x5
+ */
+func asm_print_hex
+	mov	x5, #64  /* No of bits to convert to ascii */
+
+	/* Convert to ascii number of bits in x5 */
+asm_print_hex_bits:
+	mov	x3, x30
+1:
+	sub	x5, x5, #4
+	lsrv	x0, x4, x5
+	and	x0, x0, #0xf
+	cmp	x0, #0xA
+	b.lo	2f
+	/* Add by 0x27 in addition to ASCII_OFFSET_NUM
+	 * to get ascii for characters 'a - f'.
+	 */
+	add	x0, x0, #0x27
+2:
+	add	x0, x0, #ASCII_OFFSET_NUM
+	bl	plat_crash_console_putc
+	cbnz	x5, 1b
+	ret	x3
+endfunc asm_print_hex
+
+/*
+ * Helper function to print newline to console
+ * Clobber: x0
+ */
+func asm_print_newline
+	mov	x0, '\n'
+	b	plat_crash_console_putc
+endfunc asm_print_newline
+
+	/***********************************************************
+	 * The common implementation of el3_panic for all BL stages
+	 ***********************************************************/
+
+.section .rodata.panic_str, "aS"
+	panic_msg: .asciz "PANIC at PC : 0x"
+
+func elx_panic
+#if CRASH_REPORTING && defined(IMAGE_BL31)
+	b	report_elx_panic
+#endif /* CRASH_REPORTING && IMAGE_BL31 */
+
+	b	panic_common
+endfunc elx_panic
+
+/* ---------------------------------------------------------------------------
+ * el3_panic assumes that it is invoked from a C Runtime Environment ie a
+ * valid stack exists. This call will not return.
+ * Clobber list : if CRASH_REPORTING is not enabled then x30, x0 - x6
+ * ---------------------------------------------------------------------------
+ */
+
+func el3_panic
+#if CRASH_REPORTING && defined(IMAGE_BL31)
+	b	report_el3_panic
+#endif /* CRASH_REPORTING && IMAGE_BL31 */
+
+panic_common:
+	mov	x6, x30
+	bl	plat_crash_console_init
+
+	/* Check if the console is initialized */
+	cbz	x0, _panic_handler
+
+	/* The console is initialized */
+	adr	x4, panic_msg
+	bl	asm_print_str
+	mov	x4, x6
+
+	/* The panic location is lr -4 */
+	sub	x4, x4, #4
+	bl	asm_print_hex
+
+	/* Print new line */
+	bl	asm_print_newline
+
+	bl	plat_crash_console_flush
+
+_panic_handler:
+	/* Pass to plat_panic_handler the address from where el3_panic was
+	 * called, not the address of the call from el3_panic. */
+	mov	x30, x6
+	b	plat_panic_handler
+
+endfunc el3_panic