v4.19.13 snapshot.
diff --git a/arch/arm/include/debug/8250.S b/arch/arm/include/debug/8250.S
new file mode 100644
index 0000000..7f7446f
--- /dev/null
+++ b/arch/arm/include/debug/8250.S
@@ -0,0 +1,57 @@
+/*
+ * arch/arm/include/debug/8250.S
+ *
+ * Copyright (C) 1994-2013 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/serial_reg.h>
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =CONFIG_DEBUG_UART_PHYS
+ ldr \rv, =CONFIG_DEBUG_UART_VIRT
+ .endm
+
+#ifdef CONFIG_DEBUG_UART_8250_WORD
+ .macro store, rd, rx:vararg
+ ARM_BE8(rev \rd, \rd)
+ str \rd, \rx
+ ARM_BE8(rev \rd, \rd)
+ .endm
+
+ .macro load, rd, rx:vararg
+ ldr \rd, \rx
+ ARM_BE8(rev \rd, \rd)
+ .endm
+#else
+ .macro store, rd, rx:vararg
+ strb \rd, \rx
+ .endm
+
+ .macro load, rd, rx:vararg
+ ldrb \rd, \rx
+ .endm
+#endif
+
+#define UART_SHIFT CONFIG_DEBUG_UART_8250_SHIFT
+
+ .macro senduart,rd,rx
+ store \rd, [\rx, #UART_TX << UART_SHIFT]
+ .endm
+
+ .macro busyuart,rd,rx
+1002: load \rd, [\rx, #UART_LSR << UART_SHIFT]
+ and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
+ teq \rd, #UART_LSR_TEMT | UART_LSR_THRE
+ bne 1002b
+ .endm
+
+ .macro waituart,rd,rx
+#ifdef CONFIG_DEBUG_UART_8250_FLOW_CONTROL
+1001: load \rd, [\rx, #UART_MSR << UART_SHIFT]
+ tst \rd, #UART_MSR_CTS
+ beq 1001b
+#endif
+ .endm
diff --git a/arch/arm/include/debug/asm9260.S b/arch/arm/include/debug/asm9260.S
new file mode 100644
index 0000000..292f85b
--- /dev/null
+++ b/arch/arm/include/debug/asm9260.S
@@ -0,0 +1,29 @@
+/* Debugging macro include header
+ *
+ * Copyright (C) 1994-1999 Russell King
+ * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
+ * Modified for ASM9260 by Oleksij Remepl <linux@rempel-privat.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, = CONFIG_DEBUG_UART_PHYS
+ ldr \rv, = CONFIG_DEBUG_UART_VIRT
+ .endm
+
+ .macro waituart,rd,rx
+ .endm
+
+ .macro senduart,rd,rx
+ str \rd, [\rx, #0x50] @ TXDATA
+ .endm
+
+ .macro busyuart,rd,rx
+1002: ldr \rd, [\rx, #0x60] @ STAT
+ tst \rd, #1 << 27 @ TXEMPTY
+ beq 1002b @ wait until transmit done
+ .endm
diff --git a/arch/arm/include/debug/at91.S b/arch/arm/include/debug/at91.S
new file mode 100644
index 0000000..0098401
--- /dev/null
+++ b/arch/arm/include/debug/at91.S
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2003-2005 SAN People
+ *
+ * Debugging macro include header
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+*/
+
+#define AT91_DBGU_SR (0x14) /* Status Register */
+#define AT91_DBGU_THR (0x1c) /* Transmitter Holding Register */
+#define AT91_DBGU_TXRDY (1 << 1) /* Transmitter Ready */
+#define AT91_DBGU_TXEMPTY (1 << 9) /* Transmitter Empty */
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =CONFIG_DEBUG_UART_PHYS @ System peripherals (phys address)
+ ldr \rv, =CONFIG_DEBUG_UART_VIRT @ System peripherals (virt address)
+ .endm
+
+ .macro senduart,rd,rx
+ strb \rd, [\rx, #(AT91_DBGU_THR)] @ Write to Transmitter Holding Register
+ .endm
+
+ .macro waituart,rd,rx
+1001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register
+ tst \rd, #AT91_DBGU_TXRDY @ DBGU_TXRDY = 1 when ready to transmit
+ beq 1001b
+ .endm
+
+ .macro busyuart,rd,rx
+1001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register
+ tst \rd, #AT91_DBGU_TXEMPTY @ DBGU_TXEMPTY = 1 when transmission complete
+ beq 1001b
+ .endm
+
diff --git a/arch/arm/include/debug/bcm63xx.S b/arch/arm/include/debug/bcm63xx.S
new file mode 100644
index 0000000..e7164d5
--- /dev/null
+++ b/arch/arm/include/debug/bcm63xx.S
@@ -0,0 +1,33 @@
+/*
+ * Broadcom BCM63xx low-level UART debug
+ *
+ * Copyright (C) 2014 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/serial_bcm63xx.h>
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =CONFIG_DEBUG_UART_PHYS
+ ldr \rv, =CONFIG_DEBUG_UART_VIRT
+ .endm
+
+ .macro senduart, rd, rx
+ /* word access do not work */
+ strb \rd, [\rx, #UART_FIFO_REG]
+ .endm
+
+ .macro waituart, rd, rx
+1001: ldr \rd, [\rx, #UART_IR_REG]
+ tst \rd, #(1 << UART_IR_TXEMPTY)
+ beq 1001b
+ .endm
+
+ .macro busyuart, rd, rx
+1002: ldr \rd, [\rx, #UART_IR_REG]
+ tst \rd, #(1 << UART_IR_TXTRESH)
+ beq 1002b
+ .endm
diff --git a/arch/arm/include/debug/brcmstb.S b/arch/arm/include/debug/brcmstb.S
new file mode 100644
index 0000000..0f580ca
--- /dev/null
+++ b/arch/arm/include/debug/brcmstb.S
@@ -0,0 +1,169 @@
+/*
+ * Copyright (C) 2016 Broadcom
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#include <linux/serial_reg.h>
+#include <asm/cputype.h>
+
+/* Physical register offset and virtual register offset */
+#define REG_PHYS_BASE 0xf0000000
+#define REG_PHYS_BASE_V7 0x08000000
+#define REG_VIRT_BASE 0xfc000000
+#define REG_PHYS_ADDR(x) ((x) + REG_PHYS_BASE)
+#define REG_PHYS_ADDR_V7(x) ((x) + REG_PHYS_BASE_V7)
+
+/* Product id can be read from here */
+#define SUN_TOP_CTRL_BASE REG_PHYS_ADDR(0x404000)
+#define SUN_TOP_CTRL_BASE_V7 REG_PHYS_ADDR_V7(0x404000)
+
+#define UARTA_3390 REG_PHYS_ADDR(0x40a900)
+#define UARTA_7250 REG_PHYS_ADDR(0x40b400)
+#define UARTA_7260 REG_PHYS_ADDR(0x40c000)
+#define UARTA_7268 UARTA_7260
+#define UARTA_7271 UARTA_7268
+#define UARTA_7278 REG_PHYS_ADDR_V7(0x40c000)
+#define UARTA_7364 REG_PHYS_ADDR(0x40b000)
+#define UARTA_7366 UARTA_7364
+#define UARTA_74371 REG_PHYS_ADDR(0x406b00)
+#define UARTA_7439 REG_PHYS_ADDR(0x40a900)
+#define UARTA_7445 REG_PHYS_ADDR(0x40ab00)
+
+#define UART_SHIFT 2
+
+#define checkuart(rp, rv, family_id, family) \
+ /* Load family id */ \
+ ldr rp, =family_id ; \
+ /* Compare SUN_TOP_CTRL value against it */ \
+ cmp rp, rv ; \
+ /* Passed test, load address */ \
+ ldreq rp, =UARTA_##family ; \
+ /* Jump to save UART address */ \
+ beq 91f
+
+ .macro addruart, rp, rv, tmp
+ adr \rp, 99f @ actual addr of 99f
+ ldr \rv, [\rp] @ linked addr is stored there
+ sub \rv, \rv, \rp @ offset between the two
+ ldr \rp, [\rp, #4] @ linked brcmstb_uart_config
+ sub \tmp, \rp, \rv @ actual brcmstb_uart_config
+ ldr \rp, [\tmp] @ Load brcmstb_uart_config
+ cmp \rp, #1 @ needs initialization?
+ bne 100f @ no; go load the addresses
+ mov \rv, #0 @ yes; record init is done
+ str \rv, [\tmp]
+
+ /* Check for V7 memory map if B53 */
+ mrc p15, 0, \rv, c0, c0, 0 @ get Main ID register
+ ldr \rp, =ARM_CPU_PART_MASK
+ and \rv, \rv, \rp
+ ldr \rp, =ARM_CPU_PART_BRAHMA_B53 @ check for B53 CPU
+ cmp \rv, \rp
+ bne 10f
+
+ /* if PERIPHBASE doesn't overlap REG_PHYS_BASE use V7 map */
+ mrc p15, 1, \rv, c15, c3, 0 @ get PERIPHBASE from CBAR
+ ands \rv, \rv, #REG_PHYS_BASE
+ ldreq \rp, =SUN_TOP_CTRL_BASE_V7
+
+ /* Check SUN_TOP_CTRL base */
+10: ldrne \rp, =SUN_TOP_CTRL_BASE @ load SUN_TOP_CTRL PA
+ ldr \rv, [\rp, #0] @ get register contents
+ARM_BE8( rev \rv, \rv )
+ and \rv, \rv, #0xffffff00 @ strip revision bits [7:0]
+
+ /* Chip specific detection starts here */
+20: checkuart(\rp, \rv, 0x33900000, 3390)
+21: checkuart(\rp, \rv, 0x72500000, 7250)
+22: checkuart(\rp, \rv, 0x72600000, 7260)
+23: checkuart(\rp, \rv, 0x72680000, 7268)
+24: checkuart(\rp, \rv, 0x72710000, 7271)
+25: checkuart(\rp, \rv, 0x73640000, 7364)
+26: checkuart(\rp, \rv, 0x73660000, 7366)
+27: checkuart(\rp, \rv, 0x07437100, 74371)
+28: checkuart(\rp, \rv, 0x74390000, 7439)
+29: checkuart(\rp, \rv, 0x74450000, 7445)
+30: checkuart(\rp, \rv, 0x72780000, 7278)
+
+ /* No valid UART found */
+90: mov \rp, #0
+ /* fall through */
+
+ /* Record whichever UART we chose */
+91: str \rp, [\tmp, #4] @ Store in brcmstb_uart_phys
+ cmp \rp, #0 @ Valid UART address?
+ bne 92f @ Yes, go process it
+ str \rp, [\tmp, #8] @ Store 0 in brcmstb_uart_virt
+ b 100f @ Done
+92: and \rv, \rp, #0xffffff @ offset within 16MB section
+ add \rv, \rv, #REG_VIRT_BASE
+ str \rv, [\tmp, #8] @ Store in brcmstb_uart_virt
+ b 100f
+
+ .align
+99: .word .
+ .word brcmstb_uart_config
+ .ltorg
+
+ /* Load previously selected UART address */
+100: ldr \rp, [\tmp, #4] @ Load brcmstb_uart_phys
+ ldr \rv, [\tmp, #8] @ Load brcmstb_uart_virt
+ .endm
+
+ .macro store, rd, rx:vararg
+ARM_BE8( rev \rd, \rd )
+ str \rd, \rx
+ .endm
+
+ .macro load, rd, rx:vararg
+ ldr \rd, \rx
+ARM_BE8( rev \rd, \rd )
+ .endm
+
+ .macro senduart,rd,rx
+ store \rd, [\rx, #UART_TX << UART_SHIFT]
+ .endm
+
+ .macro busyuart,rd,rx
+1002: load \rd, [\rx, #UART_LSR << UART_SHIFT]
+ and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
+ teq \rd, #UART_LSR_TEMT | UART_LSR_THRE
+ bne 1002b
+ .endm
+
+ .macro waituart,rd,rx
+ .endm
+
+/*
+ * Storage for the state maintained by the macros above.
+ *
+ * In the kernel proper, this data is located in arch/arm/mach-bcm/brcmstb.c.
+ * That's because this header is included from multiple files, and we only
+ * want a single copy of the data. In particular, the UART probing code above
+ * assumes it's running using physical addresses. This is true when this file
+ * is included from head.o, but not when included from debug.o. So we need
+ * to share the probe results between the two copies, rather than having
+ * to re-run the probing again later.
+ *
+ * In the decompressor, we put the symbol/storage right here, since common.c
+ * isn't included in the decompressor build. This symbol gets put in .text
+ * even though it's really data, since .data is discarded from the
+ * decompressor. Luckily, .text is writeable in the decompressor, unless
+ * CONFIG_ZBOOT_ROM. That dependency is handled in arch/arm/Kconfig.debug.
+ */
+#if defined(ZIMAGE)
+brcmstb_uart_config:
+ /* Debug UART initialization required */
+ .word 1
+ /* Debug UART physical address */
+ .word 0
+ /* Debug UART virtual address */
+ .word 0
+#endif
diff --git a/arch/arm/include/debug/clps711x.S b/arch/arm/include/debug/clps711x.S
new file mode 100644
index 0000000..c17ac5c
--- /dev/null
+++ b/arch/arm/include/debug/clps711x.S
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2014 Alexander Shiyan <shc_work@mail.ru>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef CONFIG_DEBUG_CLPS711X_UART2
+#define CLPS711X_UART_PADDR (0x80000000 + 0x0000)
+#define CLPS711X_UART_VADDR (0xfeff4000 + 0x0000)
+#else
+#define CLPS711X_UART_PADDR (0x80000000 + 0x1000)
+#define CLPS711X_UART_VADDR (0xfeff4000 + 0x1000)
+#endif
+
+#define SYSFLG (0x0140)
+#define SYSFLG_UBUSY (1 << 11)
+#define UARTDR (0x0480)
+
+ .macro addruart, rp, rv, tmp
+ ldr \rv, =CLPS711X_UART_VADDR
+ ldr \rp, =CLPS711X_UART_PADDR
+ .endm
+
+ .macro waituart,rd,rx
+ .endm
+
+ .macro senduart,rd,rx
+ str \rd, [\rx, #UARTDR]
+ .endm
+
+ .macro busyuart,rd,rx
+1001: ldr \rd, [\rx, #SYSFLG]
+ tst \rd, #SYSFLG_UBUSY
+ bne 1001b
+ .endm
diff --git a/arch/arm/include/debug/dc21285.S b/arch/arm/include/debug/dc21285.S
new file mode 100644
index 0000000..02247f3
--- /dev/null
+++ b/arch/arm/include/debug/dc21285.S
@@ -0,0 +1,42 @@
+/* arch/arm/mach-footbridge/include/mach/debug-macro.S
+ *
+ * Debugging macro include header
+ *
+ * Copyright (C) 1994-1999 Russell King
+ * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+*/
+
+#include <asm/hardware/dec21285.h>
+
+#include <mach/hardware.h>
+ /* For EBSA285 debugging */
+ .equ dc21285_high, ARMCSR_BASE & 0xff000000
+ .equ dc21285_low, ARMCSR_BASE & 0x00ffffff
+
+ .macro addruart, rp, rv, tmp
+ .if dc21285_low
+ mov \rp, #dc21285_low
+ .else
+ mov \rp, #0
+ .endif
+ orr \rv, \rp, #dc21285_high
+ orr \rp, \rp, #0x42000000
+ .endm
+
+ .macro senduart,rd,rx
+ str \rd, [\rx, #0x160] @ UARTDR
+ .endm
+
+ .macro busyuart,rd,rx
+1001: ldr \rd, [\rx, #0x178] @ UARTFLG
+ tst \rd, #1 << 3
+ bne 1001b
+ .endm
+
+ .macro waituart,rd,rx
+ .endm
diff --git a/arch/arm/include/debug/digicolor.S b/arch/arm/include/debug/digicolor.S
new file mode 100644
index 0000000..c951715
--- /dev/null
+++ b/arch/arm/include/debug/digicolor.S
@@ -0,0 +1,35 @@
+/*
+ * Debugging macro include header for Conexant Digicolor USART
+ *
+ * Copyright (C) 2014 Paradox Innovation Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+*/
+
+#define UA0_STATUS 0x0742
+#define UA0_EMI_REC 0x0744
+
+#define UA0_STATUS_TX_READY 0x40
+
+#ifdef CONFIG_DEBUG_UART_PHYS
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =CONFIG_DEBUG_UART_PHYS
+ ldr \rv, =CONFIG_DEBUG_UART_VIRT
+ .endm
+#endif
+
+ .macro senduart,rd,rx
+ strb \rd, [\rx, #UA0_EMI_REC]
+ .endm
+
+ .macro waituart,rd,rx
+ .endm
+
+ .macro busyuart,rd,rx
+1001: ldrb \rd, [\rx, #UA0_STATUS]
+ tst \rd, #UA0_STATUS_TX_READY
+ beq 1001b
+ .endm
diff --git a/arch/arm/include/debug/efm32.S b/arch/arm/include/debug/efm32.S
new file mode 100644
index 0000000..660fa1e
--- /dev/null
+++ b/arch/arm/include/debug/efm32.S
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2013 Pengutronix
+ * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#define UARTn_CMD 0x000c
+#define UARTn_CMD_TXEN 0x0004
+
+#define UARTn_STATUS 0x0010
+#define UARTn_STATUS_TXC 0x0020
+#define UARTn_STATUS_TXBL 0x0040
+
+#define UARTn_TXDATA 0x0034
+
+ .macro addruart, rx, tmp, tmp2
+ ldr \rx, =(CONFIG_DEBUG_UART_PHYS)
+
+ /*
+ * enable TX. The driver might disable it to save energy. We
+ * don't care about disabling at the end as during debug power
+ * consumption isn't that important.
+ */
+ ldr \tmp, =(UARTn_CMD_TXEN)
+ str \tmp, [\rx, #UARTn_CMD]
+ .endm
+
+ .macro senduart,rd,rx
+ strb \rd, [\rx, #UARTn_TXDATA]
+ .endm
+
+ .macro waituart,rd,rx
+1001: ldr \rd, [\rx, #UARTn_STATUS]
+ tst \rd, #UARTn_STATUS_TXBL
+ beq 1001b
+ .endm
+
+ .macro busyuart,rd,rx
+1001: ldr \rd, [\rx, UARTn_STATUS]
+ tst \rd, #UARTn_STATUS_TXC
+ bne 1001b
+ .endm
diff --git a/arch/arm/include/debug/exynos.S b/arch/arm/include/debug/exynos.S
new file mode 100644
index 0000000..74b5676
--- /dev/null
+++ b/arch/arm/include/debug/exynos.S
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ */
+
+/* pull in the relevant register and map files. */
+
+#define S3C_ADDR_BASE 0xF6000000
+#define S3C_VA_UART S3C_ADDR_BASE + 0x01000000
+#define EXYNOS4_PA_UART 0x13800000
+#define EXYNOS5_PA_UART 0x12C00000
+
+ /* note, for the boot process to work we have to keep the UART
+ * virtual address aligned to an 1MiB boundary for the L1
+ * mapping the head code makes. We keep the UART virtual address
+ * aligned and add in the offset when we load the value here.
+ */
+
+ .macro addruart, rp, rv, tmp
+ mrc p15, 0, \tmp, c0, c0, 0
+ and \tmp, \tmp, #0xf0
+ teq \tmp, #0xf0 @@ A15
+ beq 100f
+ mrc p15, 0, \tmp, c0, c0, 5
+ and \tmp, \tmp, #0xf00
+ teq \tmp, #0x100 @@ A15 + A7 but boot to A7
+100: ldreq \rp, =EXYNOS5_PA_UART
+ movne \rp, #EXYNOS4_PA_UART @@ EXYNOS4
+ ldr \rv, =S3C_VA_UART
+#if CONFIG_DEBUG_S3C_UART != 0
+ add \rp, \rp, #(0x10000 * CONFIG_DEBUG_S3C_UART)
+ add \rv, \rv, #(0x10000 * CONFIG_DEBUG_S3C_UART)
+#endif
+ .endm
+
+#define fifo_full fifo_full_s5pv210
+#define fifo_level fifo_level_s5pv210
+
+#include <debug/samsung.S>
diff --git a/arch/arm/include/debug/icedcc.S b/arch/arm/include/debug/icedcc.S
new file mode 100644
index 0000000..43afcb0
--- /dev/null
+++ b/arch/arm/include/debug/icedcc.S
@@ -0,0 +1,90 @@
+/*
+ * arch/arm/include/debug/icedcc.S
+ *
+ * Copyright (C) 1994-1999 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+ @@ debug using ARM EmbeddedICE DCC channel
+
+ .macro addruart, rp, rv, tmp
+ .endm
+
+#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7)
+
+ .macro senduart, rd, rx
+ mcr p14, 0, \rd, c0, c5, 0
+ .endm
+
+ .macro busyuart, rd, rx
+1001:
+ mrc p14, 0, \rx, c0, c1, 0
+ tst \rx, #0x20000000
+ beq 1001b
+ .endm
+
+ .macro waituart, rd, rx
+ mov \rd, #0x2000000
+1001:
+ subs \rd, \rd, #1
+ bmi 1002f
+ mrc p14, 0, \rx, c0, c1, 0
+ tst \rx, #0x20000000
+ bne 1001b
+1002:
+ .endm
+
+#elif defined(CONFIG_CPU_XSCALE)
+
+ .macro senduart, rd, rx
+ mcr p14, 0, \rd, c8, c0, 0
+ .endm
+
+ .macro busyuart, rd, rx
+1001:
+ mrc p14, 0, \rx, c14, c0, 0
+ tst \rx, #0x10000000
+ beq 1001b
+ .endm
+
+ .macro waituart, rd, rx
+ mov \rd, #0x10000000
+1001:
+ subs \rd, \rd, #1
+ bmi 1002f
+ mrc p14, 0, \rx, c14, c0, 0
+ tst \rx, #0x10000000
+ bne 1001b
+1002:
+ .endm
+
+#else
+
+ .macro senduart, rd, rx
+ mcr p14, 0, \rd, c1, c0, 0
+ .endm
+
+ .macro busyuart, rd, rx
+1001:
+ mrc p14, 0, \rx, c0, c0, 0
+ tst \rx, #2
+ beq 1001b
+
+ .endm
+
+ .macro waituart, rd, rx
+ mov \rd, #0x2000000
+1001:
+ subs \rd, \rd, #1
+ bmi 1002f
+ mrc p14, 0, \rx, c0, c0, 0
+ tst \rx, #2
+ bne 1001b
+1002:
+ .endm
+
+#endif /* CONFIG_CPU_V6 */
diff --git a/arch/arm/include/debug/imx-uart.h b/arch/arm/include/debug/imx-uart.h
new file mode 100644
index 0000000..bce58e9
--- /dev/null
+++ b/arch/arm/include/debug/imx-uart.h
@@ -0,0 +1,145 @@
+/*
+ * Copyright (C) 2012-2015 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __DEBUG_IMX_UART_H
+#define __DEBUG_IMX_UART_H
+
+#define IMX1_UART1_BASE_ADDR 0x00206000
+#define IMX1_UART2_BASE_ADDR 0x00207000
+#define IMX1_UART_BASE_ADDR(n) IMX1_UART##n##_BASE_ADDR
+#define IMX1_UART_BASE(n) IMX1_UART_BASE_ADDR(n)
+
+#define IMX21_UART1_BASE_ADDR 0x1000a000
+#define IMX21_UART2_BASE_ADDR 0x1000b000
+#define IMX21_UART3_BASE_ADDR 0x1000c000
+#define IMX21_UART4_BASE_ADDR 0x1000d000
+#define IMX21_UART_BASE_ADDR(n) IMX21_UART##n##_BASE_ADDR
+#define IMX21_UART_BASE(n) IMX21_UART_BASE_ADDR(n)
+
+#define IMX25_UART1_BASE_ADDR 0x43f90000
+#define IMX25_UART2_BASE_ADDR 0x43f94000
+#define IMX25_UART3_BASE_ADDR 0x5000c000
+#define IMX25_UART4_BASE_ADDR 0x50008000
+#define IMX25_UART5_BASE_ADDR 0x5002c000
+#define IMX25_UART_BASE_ADDR(n) IMX25_UART##n##_BASE_ADDR
+#define IMX25_UART_BASE(n) IMX25_UART_BASE_ADDR(n)
+
+#define IMX31_UART1_BASE_ADDR 0x43f90000
+#define IMX31_UART2_BASE_ADDR 0x43f94000
+#define IMX31_UART3_BASE_ADDR 0x5000c000
+#define IMX31_UART4_BASE_ADDR 0x43fb0000
+#define IMX31_UART5_BASE_ADDR 0x43fb4000
+#define IMX31_UART_BASE_ADDR(n) IMX31_UART##n##_BASE_ADDR
+#define IMX31_UART_BASE(n) IMX31_UART_BASE_ADDR(n)
+
+#define IMX35_UART1_BASE_ADDR 0x43f90000
+#define IMX35_UART2_BASE_ADDR 0x43f94000
+#define IMX35_UART3_BASE_ADDR 0x5000c000
+#define IMX35_UART_BASE_ADDR(n) IMX35_UART##n##_BASE_ADDR
+#define IMX35_UART_BASE(n) IMX35_UART_BASE_ADDR(n)
+
+#define IMX50_UART1_BASE_ADDR 0x53fbc000
+#define IMX50_UART2_BASE_ADDR 0x53fc0000
+#define IMX50_UART3_BASE_ADDR 0x5000c000
+#define IMX50_UART4_BASE_ADDR 0x53ff0000
+#define IMX50_UART5_BASE_ADDR 0x63f90000
+#define IMX50_UART_BASE_ADDR(n) IMX50_UART##n##_BASE_ADDR
+#define IMX50_UART_BASE(n) IMX50_UART_BASE_ADDR(n)
+
+#define IMX51_UART1_BASE_ADDR 0x73fbc000
+#define IMX51_UART2_BASE_ADDR 0x73fc0000
+#define IMX51_UART3_BASE_ADDR 0x7000c000
+#define IMX51_UART_BASE_ADDR(n) IMX51_UART##n##_BASE_ADDR
+#define IMX51_UART_BASE(n) IMX51_UART_BASE_ADDR(n)
+
+#define IMX53_UART1_BASE_ADDR 0x53fbc000
+#define IMX53_UART2_BASE_ADDR 0x53fc0000
+#define IMX53_UART3_BASE_ADDR 0x5000c000
+#define IMX53_UART4_BASE_ADDR 0x53ff0000
+#define IMX53_UART5_BASE_ADDR 0x63f90000
+#define IMX53_UART_BASE_ADDR(n) IMX53_UART##n##_BASE_ADDR
+#define IMX53_UART_BASE(n) IMX53_UART_BASE_ADDR(n)
+
+#define IMX6Q_UART1_BASE_ADDR 0x02020000
+#define IMX6Q_UART2_BASE_ADDR 0x021e8000
+#define IMX6Q_UART3_BASE_ADDR 0x021ec000
+#define IMX6Q_UART4_BASE_ADDR 0x021f0000
+#define IMX6Q_UART5_BASE_ADDR 0x021f4000
+#define IMX6Q_UART_BASE_ADDR(n) IMX6Q_UART##n##_BASE_ADDR
+#define IMX6Q_UART_BASE(n) IMX6Q_UART_BASE_ADDR(n)
+
+#define IMX6SL_UART1_BASE_ADDR 0x02020000
+#define IMX6SL_UART2_BASE_ADDR 0x02024000
+#define IMX6SL_UART3_BASE_ADDR 0x02034000
+#define IMX6SL_UART4_BASE_ADDR 0x02038000
+#define IMX6SL_UART5_BASE_ADDR 0x02018000
+#define IMX6SL_UART_BASE_ADDR(n) IMX6SL_UART##n##_BASE_ADDR
+#define IMX6SL_UART_BASE(n) IMX6SL_UART_BASE_ADDR(n)
+
+#define IMX6SX_UART1_BASE_ADDR 0x02020000
+#define IMX6SX_UART2_BASE_ADDR 0x021e8000
+#define IMX6SX_UART3_BASE_ADDR 0x021ec000
+#define IMX6SX_UART4_BASE_ADDR 0x021f0000
+#define IMX6SX_UART5_BASE_ADDR 0x021f4000
+#define IMX6SX_UART6_BASE_ADDR 0x022a0000
+#define IMX6SX_UART_BASE_ADDR(n) IMX6SX_UART##n##_BASE_ADDR
+#define IMX6SX_UART_BASE(n) IMX6SX_UART_BASE_ADDR(n)
+
+#define IMX6UL_UART1_BASE_ADDR 0x02020000
+#define IMX6UL_UART2_BASE_ADDR 0x021e8000
+#define IMX6UL_UART3_BASE_ADDR 0x021ec000
+#define IMX6UL_UART4_BASE_ADDR 0x021f0000
+#define IMX6UL_UART5_BASE_ADDR 0x021f4000
+#define IMX6UL_UART6_BASE_ADDR 0x021fc000
+#define IMX6UL_UART7_BASE_ADDR 0x02018000
+#define IMX6UL_UART8_BASE_ADDR 0x02024000
+#define IMX6UL_UART_BASE_ADDR(n) IMX6UL_UART##n##_BASE_ADDR
+#define IMX6UL_UART_BASE(n) IMX6UL_UART_BASE_ADDR(n)
+
+#define IMX7D_UART1_BASE_ADDR 0x30860000
+#define IMX7D_UART2_BASE_ADDR 0x30890000
+#define IMX7D_UART3_BASE_ADDR 0x30880000
+#define IMX7D_UART4_BASE_ADDR 0x30a60000
+#define IMX7D_UART5_BASE_ADDR 0x30a70000
+#define IMX7D_UART6_BASE_ADDR 0x30a80000
+#define IMX7D_UART7_BASE_ADDR 0x30a90000
+#define IMX7D_UART_BASE_ADDR(n) IMX7D_UART##n##_BASE_ADDR
+#define IMX7D_UART_BASE(n) IMX7D_UART_BASE_ADDR(n)
+
+#define IMX_DEBUG_UART_BASE(soc) soc##_UART_BASE(CONFIG_DEBUG_IMX_UART_PORT)
+
+#ifdef CONFIG_DEBUG_IMX1_UART
+#define UART_PADDR IMX_DEBUG_UART_BASE(IMX1)
+#elif defined(CONFIG_DEBUG_IMX21_IMX27_UART)
+#define UART_PADDR IMX_DEBUG_UART_BASE(IMX21)
+#elif defined(CONFIG_DEBUG_IMX25_UART)
+#define UART_PADDR IMX_DEBUG_UART_BASE(IMX25)
+#elif defined(CONFIG_DEBUG_IMX31_UART)
+#define UART_PADDR IMX_DEBUG_UART_BASE(IMX31)
+#elif defined(CONFIG_DEBUG_IMX35_UART)
+#define UART_PADDR IMX_DEBUG_UART_BASE(IMX35)
+#elif defined(CONFIG_DEBUG_IMX50_UART)
+#define UART_PADDR IMX_DEBUG_UART_BASE(IMX50)
+#elif defined(CONFIG_DEBUG_IMX51_UART)
+#define UART_PADDR IMX_DEBUG_UART_BASE(IMX51)
+#elif defined(CONFIG_DEBUG_IMX53_UART)
+#define UART_PADDR IMX_DEBUG_UART_BASE(IMX53)
+#elif defined(CONFIG_DEBUG_IMX6Q_UART)
+#define UART_PADDR IMX_DEBUG_UART_BASE(IMX6Q)
+#elif defined(CONFIG_DEBUG_IMX6SL_UART)
+#define UART_PADDR IMX_DEBUG_UART_BASE(IMX6SL)
+#elif defined(CONFIG_DEBUG_IMX6SX_UART)
+#define UART_PADDR IMX_DEBUG_UART_BASE(IMX6SX)
+#elif defined(CONFIG_DEBUG_IMX6UL_UART)
+#define UART_PADDR IMX_DEBUG_UART_BASE(IMX6UL)
+#elif defined(CONFIG_DEBUG_IMX7D_UART)
+#define UART_PADDR IMX_DEBUG_UART_BASE(IMX7D)
+
+#endif
+
+#endif /* __DEBUG_IMX_UART_H */
diff --git a/arch/arm/include/debug/imx.S b/arch/arm/include/debug/imx.S
new file mode 100644
index 0000000..92c4476
--- /dev/null
+++ b/arch/arm/include/debug/imx.S
@@ -0,0 +1,50 @@
+/* arch/arm/mach-imx/include/mach/debug-macro.S
+ *
+ * Debugging macro include header
+ *
+ * Copyright (C) 1994-1999 Russell King
+ * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <asm/assembler.h>
+#include "imx-uart.h"
+
+/*
+ * FIXME: This is a copy of IMX_IO_P2V in hardware.h, and needs to
+ * stay sync with that. It's hard to maintain, and should be fixed
+ * globally for multi-platform build to use a fixed virtual address
+ * for low-level debug uart port across platforms.
+ */
+#define IMX_IO_P2V(x) ( \
+ (((x) & 0x80000000) >> 7) | \
+ (0xf4000000 + \
+ (((x) & 0x50000000) >> 6) + \
+ (((x) & 0x0b000000) >> 4) + \
+ (((x) & 0x000fffff))))
+
+#define UART_VADDR IMX_IO_P2V(UART_PADDR)
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =UART_PADDR @ physical
+ ldr \rv, =UART_VADDR @ virtual
+ .endm
+
+ .macro senduart,rd,rx
+ ARM_BE8(rev \rd, \rd)
+ str \rd, [\rx, #0x40] @ TXDATA
+ .endm
+
+ .macro waituart,rd,rx
+ .endm
+
+ .macro busyuart,rd,rx
+1002: ldr \rd, [\rx, #0x98] @ SR2
+ ARM_BE8(rev \rd, \rd)
+ tst \rd, #1 << 3 @ TXDC
+ beq 1002b @ wait until transmit done
+ .endm
diff --git a/arch/arm/include/debug/ks8695.S b/arch/arm/include/debug/ks8695.S
new file mode 100644
index 0000000..961da1f
--- /dev/null
+++ b/arch/arm/include/debug/ks8695.S
@@ -0,0 +1,40 @@
+/*
+ * arch/arm/include/debug/ks8695.S
+ *
+ * Copyright (C) 2006 Ben Dooks <ben@simtec.co.uk>
+ * Copyright (C) 2006 Simtec Electronics
+ *
+ * KS8695 - Debug macros
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#define KS8695_UART_PA 0x03ffe000
+#define KS8695_UART_VA 0xf00fe000
+#define KS8695_URTH (0x04)
+#define KS8695_URLS (0x14)
+#define URLS_URTE (1 << 6)
+#define URLS_URTHRE (1 << 5)
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =KS8695_UART_PA @ physical base address
+ ldr \rv, =KS8695_UART_VA @ virtual base address
+ .endm
+
+ .macro senduart, rd, rx
+ str \rd, [\rx, #KS8695_URTH] @ Write to Transmit Holding Register
+ .endm
+
+ .macro busyuart, rd, rx
+1001: ldr \rd, [\rx, #KS8695_URLS] @ Read Line Status Register
+ tst \rd, #URLS_URTE @ Holding & Shift registers empty?
+ beq 1001b
+ .endm
+
+ .macro waituart, rd, rx
+1001: ldr \rd, [\rx, #KS8695_URLS] @ Read Line Status Register
+ tst \rd, #URLS_URTHRE @ Holding Register empty?
+ beq 1001b
+ .endm
diff --git a/arch/arm/include/debug/meson.S b/arch/arm/include/debug/meson.S
new file mode 100644
index 0000000..1bae99b
--- /dev/null
+++ b/arch/arm/include/debug/meson.S
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2014 Carlo Caione
+ * Carlo Caione <carlo@caione.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#define MESON_AO_UART_WFIFO 0x0
+#define MESON_AO_UART_STATUS 0xc
+
+#define MESON_AO_UART_TX_FIFO_EMPTY (1 << 22)
+#define MESON_AO_UART_TX_FIFO_FULL (1 << 21)
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =(CONFIG_DEBUG_UART_PHYS) @ physical
+ ldr \rv, =(CONFIG_DEBUG_UART_VIRT) @ virtual
+ .endm
+
+ .macro senduart,rd,rx
+ str \rd, [\rx, #MESON_AO_UART_WFIFO]
+ .endm
+
+ .macro busyuart,rd,rx
+1002: ldr \rd, [\rx, #MESON_AO_UART_STATUS]
+ tst \rd, #MESON_AO_UART_TX_FIFO_EMPTY
+ beq 1002b
+ .endm
+
+ .macro waituart,rd,rx
+1001: ldr \rd, [\rx, #MESON_AO_UART_STATUS]
+ tst \rd, #MESON_AO_UART_TX_FIFO_FULL
+ bne 1001b
+ .endm
diff --git a/arch/arm/include/debug/msm.S b/arch/arm/include/debug/msm.S
new file mode 100644
index 0000000..b03024f
--- /dev/null
+++ b/arch/arm/include/debug/msm.S
@@ -0,0 +1,54 @@
+/*
+ *
+ * Copyright (C) 2007 Google, Inc.
+ * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ * Author: Brian Swetland <swetland@google.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =CONFIG_DEBUG_UART_PHYS
+ ldr \rv, =CONFIG_DEBUG_UART_VIRT
+ .endm
+
+ .macro senduart, rd, rx
+ARM_BE8(rev \rd, \rd )
+ @ Write the 1 character to UARTDM_TF
+ str \rd, [\rx, #0x70]
+ .endm
+
+ .macro waituart, rd, rx
+ @ check for TX_EMT in UARTDM_SR
+ ldr \rd, [\rx, #0x08]
+ARM_BE8(rev \rd, \rd )
+ tst \rd, #0x08
+ bne 1002f
+ @ wait for TXREADY in UARTDM_ISR
+1001: ldr \rd, [\rx, #0x14]
+ARM_BE8(rev \rd, \rd )
+ tst \rd, #0x80
+ beq 1001b
+1002:
+ @ Clear TX_READY by writing to the UARTDM_CR register
+ mov \rd, #0x300
+ARM_BE8(rev \rd, \rd )
+ str \rd, [\rx, #0x10]
+ @ Write 0x1 to NCF register
+ mov \rd, #0x1
+ARM_BE8(rev \rd, \rd )
+ str \rd, [\rx, #0x40]
+ @ UARTDM reg. Read to induce delay
+ ldr \rd, [\rx, #0x08]
+ .endm
+
+ .macro busyuart, rd, rx
+ .endm
diff --git a/arch/arm/include/debug/netx.S b/arch/arm/include/debug/netx.S
new file mode 100644
index 0000000..81e1b2a
--- /dev/null
+++ b/arch/arm/include/debug/netx.S
@@ -0,0 +1,36 @@
+/*
+ * Debugging macro include header
+ *
+ * Copyright (C) 1994-1999 Russell King
+ * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+*/
+
+#define UART_DATA 0
+#define UART_FLAG 0x18
+#define UART_FLAG_BUSY (1 << 3)
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =CONFIG_DEBUG_UART_PHYS
+ ldr \rv, =CONFIG_DEBUG_UART_VIRT
+ .endm
+
+ .macro senduart,rd,rx
+ str \rd, [\rx, #UART_DATA]
+ .endm
+
+ .macro busyuart,rd,rx
+1002: ldr \rd, [\rx, #UART_FLAG]
+ tst \rd, #UART_FLAG_BUSY
+ bne 1002b
+ .endm
+
+ .macro waituart,rd,rx
+1001: ldr \rd, [\rx, #UART_FLAG]
+ tst \rd, #UART_FLAG_BUSY
+ bne 1001b
+ .endm
diff --git a/arch/arm/include/debug/omap2plus.S b/arch/arm/include/debug/omap2plus.S
new file mode 100644
index 0000000..192a758
--- /dev/null
+++ b/arch/arm/include/debug/omap2plus.S
@@ -0,0 +1,83 @@
+/*
+ * Debugging macro include header
+ *
+ * Copyright (C) 1994-1999 Russell King
+ * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+*/
+
+#include <linux/serial_reg.h>
+
+/* External port on Zoom2/3 */
+#define ZOOM_UART_BASE 0x10000000
+#define ZOOM_UART_VIRT 0xfa400000
+
+#define OMAP_PORT_SHIFT 2
+#define ZOOM_PORT_SHIFT 1
+
+#define UART_OFFSET(addr) ((addr) & 0x00ffffff)
+
+ .pushsection .data
+ .align 2
+omap_uart_phys: .word 0
+omap_uart_virt: .word 0
+omap_uart_lsr: .word 0
+ .popsection
+
+ .macro addruart, rp, rv, tmp
+
+ /* Use omap_uart_phys/virt if already configured */
+10: adr \rp, 99f @ get effective addr of 99f
+ ldr \rv, [\rp] @ get absolute addr of 99f
+ sub \rv, \rv, \rp @ offset between the two
+ ldr \rp, [\rp, #4] @ abs addr of omap_uart_phys
+ sub \tmp, \rp, \rv @ make it effective
+ ldr \rp, [\tmp, #0] @ omap_uart_phys
+ ldr \rv, [\tmp, #4] @ omap_uart_virt
+ cmp \rp, #0 @ is port configured?
+ cmpne \rv, #0
+ bne 100f @ already configured
+
+ /* Configure the UART offset from the phys/virt base */
+#ifdef CONFIG_DEBUG_ZOOM_UART
+ ldr \rp, =ZOOM_UART_BASE
+ str \rp, [\tmp, #0] @ omap_uart_phys
+ ldr \rp, =ZOOM_UART_VIRT
+ str \rp, [\tmp, #4] @ omap_uart_virt
+ mov \rp, #(UART_LSR << ZOOM_PORT_SHIFT)
+ str \rp, [\tmp, #8] @ omap_uart_lsr
+#endif
+ b 10b
+
+ .align
+99: .word .
+ .word omap_uart_phys
+ .ltorg
+
+100: /* Pass the UART_LSR reg address */
+ ldr \tmp, [\tmp, #8] @ omap_uart_lsr
+ add \rp, \rp, \tmp
+ add \rv, \rv, \tmp
+ .endm
+
+ .macro senduart,rd,rx
+ orr \rd, \rd, \rx, lsl #24 @ preserve LSR reg offset
+ bic \rx, \rx, #0xff @ get base (THR) reg address
+ strb \rd, [\rx] @ send lower byte of rd
+ orr \rx, \rx, \rd, lsr #24 @ restore original rx (LSR)
+ bic \rd, \rd, #(0xff << 24) @ restore original rd
+ .endm
+
+ .macro busyuart,rd,rx
+1001: ldrb \rd, [\rx] @ rx contains UART_LSR address
+ and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
+ teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
+ bne 1001b
+ .endm
+
+ .macro waituart,rd,rx
+ .endm
diff --git a/arch/arm/include/debug/palmchip.S b/arch/arm/include/debug/palmchip.S
new file mode 100644
index 0000000..aed5933
--- /dev/null
+++ b/arch/arm/include/debug/palmchip.S
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <linux/serial_reg.h>
+
+#undef UART_TX
+#undef UART_LSR
+#undef UART_MSR
+
+#define UART_TX 1
+#define UART_LSR 7
+#define UART_MSR 8
+
+#include <debug/8250.S>
diff --git a/arch/arm/include/debug/pl01x.S b/arch/arm/include/debug/pl01x.S
new file mode 100644
index 0000000..f7d8323
--- /dev/null
+++ b/arch/arm/include/debug/pl01x.S
@@ -0,0 +1,45 @@
+/* arch/arm/include/debug/pl01x.S
+ *
+ * Debugging macro include header
+ *
+ * Copyright (C) 1994-1999 Russell King
+ * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+*/
+#include <linux/amba/serial.h>
+
+#ifdef CONFIG_DEBUG_ZTE_ZX
+#undef UART01x_DR
+#undef UART01x_FR
+#define UART01x_DR 0x04
+#define UART01x_FR 0x14
+#endif
+
+#ifdef CONFIG_DEBUG_UART_PHYS
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =CONFIG_DEBUG_UART_PHYS
+ ldr \rv, =CONFIG_DEBUG_UART_VIRT
+ .endm
+#endif
+
+ .macro senduart,rd,rx
+ strb \rd, [\rx, #UART01x_DR]
+ .endm
+
+ .macro waituart,rd,rx
+1001: ldr \rd, [\rx, #UART01x_FR]
+ ARM_BE8( rev \rd, \rd )
+ tst \rd, #UART01x_FR_TXFF
+ bne 1001b
+ .endm
+
+ .macro busyuart,rd,rx
+1001: ldr \rd, [\rx, #UART01x_FR]
+ ARM_BE8( rev \rd, \rd )
+ tst \rd, #UART01x_FR_BUSY
+ bne 1001b
+ .endm
diff --git a/arch/arm/include/debug/renesas-scif.S b/arch/arm/include/debug/renesas-scif.S
new file mode 100644
index 0000000..1c5f795
--- /dev/null
+++ b/arch/arm/include/debug/renesas-scif.S
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Renesas SCIF(A) debugging macro include header
+ *
+ * Based on r8a7790.S
+ *
+ * Copyright (C) 2012-2013 Renesas Electronics Corporation
+ * Copyright (C) 1994-1999 Russell King
+ */
+
+#define SCIF_PHYS CONFIG_DEBUG_UART_PHYS
+#define SCIF_VIRT ((SCIF_PHYS & 0x00ffffff) | 0xfd000000)
+
+#if CONFIG_DEBUG_UART_PHYS < 0xe6e00000
+/* SCIFA */
+#define FTDR 0x20
+#define FSR 0x14
+#else
+/* SCIF */
+#define FTDR 0x0c
+#define FSR 0x10
+#endif
+
+#define TDFE (1 << 5)
+#define TEND (1 << 6)
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =SCIF_PHYS
+ ldr \rv, =SCIF_VIRT
+ .endm
+
+ .macro waituart, rd, rx
+1001: ldrh \rd, [\rx, #FSR]
+ tst \rd, #TDFE
+ beq 1001b
+ .endm
+
+ .macro senduart, rd, rx
+ strb \rd, [\rx, #FTDR]
+ ldrh \rd, [\rx, #FSR]
+ bic \rd, \rd, #TEND
+ strh \rd, [\rx, #FSR]
+ .endm
+
+ .macro busyuart, rd, rx
+1001: ldrh \rd, [\rx, #FSR]
+ tst \rd, #TEND
+ beq 1001b
+ .endm
diff --git a/arch/arm/include/debug/s3c24xx.S b/arch/arm/include/debug/s3c24xx.S
new file mode 100644
index 0000000..b1f54dc
--- /dev/null
+++ b/arch/arm/include/debug/s3c24xx.S
@@ -0,0 +1,46 @@
+/* arch/arm/mach-s3c2410/include/mach/debug-macro.S
+ *
+ * Debugging macro include header
+ *
+ * Copyright (C) 1994-1999 Russell King
+ * Copyright (C) 2005 Simtec Electronics
+ *
+ * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/serial_s3c.h>
+
+#define S3C2410_UART1_OFF (0x4000)
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, = CONFIG_DEBUG_UART_PHYS
+ ldr \rv, = CONFIG_DEBUG_UART_VIRT
+ .endm
+
+ .macro fifo_full_s3c2410 rd, rx
+ ldr \rd, [\rx, # S3C2410_UFSTAT]
+ tst \rd, #S3C2410_UFSTAT_TXFULL
+ .endm
+
+ .macro fifo_level_s3c2410 rd, rx
+ ldr \rd, [\rx, # S3C2410_UFSTAT]
+ and \rd, \rd, #S3C2410_UFSTAT_TXMASK
+ .endm
+
+/* Select the correct implementation depending on the configuration. The
+ * S3C2440 will get selected by default, as these are the most widely
+ * used variants of these
+*/
+
+#if defined(CONFIG_DEBUG_S3C2410_UART)
+#define fifo_full fifo_full_s3c2410
+#define fifo_level fifo_level_s3c2410
+#endif
+
+/* include the reset of the code which will do the work */
+
+#include <debug/samsung.S>
diff --git a/arch/arm/include/debug/s5pv210.S b/arch/arm/include/debug/s5pv210.S
new file mode 100644
index 0000000..4f1a73e
--- /dev/null
+++ b/arch/arm/include/debug/s5pv210.S
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+/* pull in the relevant register and map files. */
+
+#define S3C_ADDR_BASE 0xF6000000
+#define S3C_VA_UART S3C_ADDR_BASE + 0x01000000
+#define S5PV210_PA_UART 0xe2900000
+
+ /* note, for the boot process to work we have to keep the UART
+ * virtual address aligned to an 1MiB boundary for the L1
+ * mapping the head code makes. We keep the UART virtual address
+ * aligned and add in the offset when we load the value here.
+ */
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =S5PV210_PA_UART
+ ldr \rv, =S3C_VA_UART
+#if CONFIG_DEBUG_S3C_UART != 0
+ add \rp, \rp, #(0x400 * CONFIG_DEBUG_S3C_UART)
+ add \rv, \rv, #(0x400 * CONFIG_DEBUG_S3C_UART)
+#endif
+ .endm
+
+#define fifo_full fifo_full_s5pv210
+#define fifo_level fifo_level_s5pv210
+
+#include <debug/samsung.S>
diff --git a/arch/arm/include/debug/sa1100.S b/arch/arm/include/debug/sa1100.S
new file mode 100644
index 0000000..a0ae4f4
--- /dev/null
+++ b/arch/arm/include/debug/sa1100.S
@@ -0,0 +1,68 @@
+/* arch/arm/include/debug/sa1100.S
+ *
+ * Debugging macro include header
+ *
+ * Copyright (C) 1994-1999 Russell King
+ * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+*/
+
+#define UTCR3 0x0c
+#define UTDR 0x14
+#define UTSR1 0x20
+#define UTCR3_TXE 0x00000002 /* Transmit Enable */
+#define UTSR1_TBY 0x00000001 /* Transmitter BusY (read) */
+#define UTSR1_TNF 0x00000004 /* Transmit FIFO Not Full (read) */
+
+ .macro addruart, rp, rv, tmp
+ mrc p15, 0, \rp, c1, c0
+ tst \rp, #1 @ MMU enabled?
+ moveq \rp, #0x80000000 @ physical base address
+ movne \rp, #0xf8000000 @ virtual address
+
+ @ We probe for the active serial port here, coherently with
+ @ the comment in arch/arm/mach-sa1100/include/mach/uncompress.h.
+ @ We assume r1 can be clobbered.
+
+ @ see if Ser3 is active
+ add \rp, \rp, #0x00050000
+ ldr \rv, [\rp, #UTCR3]
+ tst \rv, #UTCR3_TXE
+
+ @ if Ser3 is inactive, then try Ser1
+ addeq \rp, \rp, #(0x00010000 - 0x00050000)
+ ldreq \rv, [\rp, #UTCR3]
+ tsteq \rv, #UTCR3_TXE
+
+ @ if Ser1 is inactive, then try Ser2
+ addeq \rp, \rp, #(0x00030000 - 0x00010000)
+ ldreq \rv, [\rp, #UTCR3]
+ tsteq \rv, #UTCR3_TXE
+
+ @ clear top bits, and generate both phys and virt addresses
+ lsl \rp, \rp, #8
+ lsr \rp, \rp, #8
+ orr \rv, \rp, #0xf8000000 @ virtual
+ orr \rp, \rp, #0x80000000 @ physical
+
+ .endm
+
+ .macro senduart,rd,rx
+ str \rd, [\rx, #UTDR]
+ .endm
+
+ .macro waituart,rd,rx
+1001: ldr \rd, [\rx, #UTSR1]
+ tst \rd, #UTSR1_TNF
+ beq 1001b
+ .endm
+
+ .macro busyuart,rd,rx
+1001: ldr \rd, [\rx, #UTSR1]
+ tst \rd, #UTSR1_TBY
+ bne 1001b
+ .endm
diff --git a/arch/arm/include/debug/samsung.S b/arch/arm/include/debug/samsung.S
new file mode 100644
index 0000000..69201d7
--- /dev/null
+++ b/arch/arm/include/debug/samsung.S
@@ -0,0 +1,91 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright 2005, 2007 Simtec Electronics
+ * http://armlinux.simtec.co.uk/
+ * Ben Dooks <ben@simtec.co.uk>
+ */
+
+#include <linux/serial_s3c.h>
+
+/* The S5PV210/S5PC110 implementations are as belows. */
+
+ .macro fifo_level_s5pv210 rd, rx
+ ldr \rd, [\rx, # S3C2410_UFSTAT]
+ARM_BE8(rev \rd, \rd)
+ and \rd, \rd, #S5PV210_UFSTAT_TXMASK
+ .endm
+
+ .macro fifo_full_s5pv210 rd, rx
+ ldr \rd, [\rx, # S3C2410_UFSTAT]
+ARM_BE8(rev \rd, \rd)
+ tst \rd, #S5PV210_UFSTAT_TXFULL
+ .endm
+
+/* The S3C2440 implementations are used by default as they are the
+ * most widely re-used */
+
+ .macro fifo_level_s3c2440 rd, rx
+ ldr \rd, [\rx, # S3C2410_UFSTAT]
+ARM_BE8(rev \rd, \rd)
+ and \rd, \rd, #S3C2440_UFSTAT_TXMASK
+ .endm
+
+#ifndef fifo_level
+#define fifo_level fifo_level_s3c2440
+#endif
+
+ .macro fifo_full_s3c2440 rd, rx
+ ldr \rd, [\rx, # S3C2410_UFSTAT]
+ARM_BE8(rev \rd, \rd)
+ tst \rd, #S3C2440_UFSTAT_TXFULL
+ .endm
+
+#ifndef fifo_full
+#define fifo_full fifo_full_s3c2440
+#endif
+
+ .macro senduart,rd,rx
+ strb \rd, [\rx, # S3C2410_UTXH]
+ .endm
+
+ .macro busyuart, rd, rx
+ ldr \rd, [\rx, # S3C2410_UFCON]
+ARM_BE8(rev \rd, \rd)
+ tst \rd, #S3C2410_UFCON_FIFOMODE @ fifo enabled?
+ beq 1001f @
+ @ FIFO enabled...
+1003:
+ fifo_full \rd, \rx
+ bne 1003b
+ b 1002f
+
+1001:
+ @ busy waiting for non fifo
+ ldr \rd, [\rx, # S3C2410_UTRSTAT]
+ARM_BE8(rev \rd, \rd)
+ tst \rd, #S3C2410_UTRSTAT_TXFE
+ beq 1001b
+
+1002: @ exit busyuart
+ .endm
+
+ .macro waituart,rd,rx
+ ldr \rd, [\rx, # S3C2410_UFCON]
+ARM_BE8(rev \rd, \rd)
+ tst \rd, #S3C2410_UFCON_FIFOMODE @ fifo enabled?
+ beq 1001f @
+ @ FIFO enabled...
+1003:
+ fifo_level \rd, \rx
+ teq \rd, #0
+ bne 1003b
+ b 1002f
+1001:
+ @ idle waiting for non fifo
+ ldr \rd, [\rx, # S3C2410_UTRSTAT]
+ARM_BE8(rev \rd, \rd)
+ tst \rd, #S3C2410_UTRSTAT_TXFE
+ beq 1001b
+
+1002: @ exit busyuart
+ .endm
diff --git a/arch/arm/include/debug/sirf.S b/arch/arm/include/debug/sirf.S
new file mode 100644
index 0000000..630f231
--- /dev/null
+++ b/arch/arm/include/debug/sirf.S
@@ -0,0 +1,38 @@
+/*
+ * arch/arm/mach-prima2/include/mach/debug-macro.S
+ *
+ * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
+ *
+ * Licensed under GPLv2 or later.
+ */
+
+#define SIRF_LLUART_TXFIFO_STATUS 0x0114
+#define SIRF_LLUART_TXFIFO_DATA 0x0118
+
+#define SIRF_LLUART_TXFIFO_FULL (1 << 5)
+
+#ifdef CONFIG_DEBUG_SIRFATLAS7_UART0
+#define SIRF_LLUART_TXFIFO_EMPTY (1 << 8)
+#else
+#define SIRF_LLUART_TXFIFO_EMPTY (1 << 6)
+#endif
+
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =CONFIG_DEBUG_UART_PHYS @ physical
+ ldr \rv, =CONFIG_DEBUG_UART_VIRT @ virtual
+ .endm
+
+ .macro senduart,rd,rx
+ str \rd, [\rx, #SIRF_LLUART_TXFIFO_DATA]
+ .endm
+
+ .macro busyuart,rd,rx
+ .endm
+
+ .macro waituart,rd,rx
+1001: ldr \rd, [\rx, #SIRF_LLUART_TXFIFO_STATUS]
+ tst \rd, #SIRF_LLUART_TXFIFO_EMPTY
+ beq 1001b
+ .endm
+
diff --git a/arch/arm/include/debug/sti.S b/arch/arm/include/debug/sti.S
new file mode 100644
index 0000000..e3aa58f
--- /dev/null
+++ b/arch/arm/include/debug/sti.S
@@ -0,0 +1,61 @@
+/*
+ * arch/arm/include/debug/sti.S
+ *
+ * Debugging macro include header
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#define STIH41X_COMMS_BASE 0xfed00000
+#define STIH41X_ASC2_BASE (STIH41X_COMMS_BASE+0x32000)
+
+#define STIH41X_SBC_LPM_BASE 0xfe400000
+#define STIH41X_SBC_COMMS_BASE (STIH41X_SBC_LPM_BASE + 0x100000)
+#define STIH41X_SBC_ASC1_BASE (STIH41X_SBC_COMMS_BASE + 0x31000)
+
+
+#define VIRT_ADDRESS(x) (x - 0x1000000)
+
+#if IS_ENABLED(CONFIG_STIH41X_DEBUG_ASC2)
+#define DEBUG_LL_UART_BASE STIH41X_ASC2_BASE
+#endif
+
+#if IS_ENABLED(CONFIG_STIH41X_DEBUG_SBC_ASC1)
+#define DEBUG_LL_UART_BASE STIH41X_SBC_ASC1_BASE
+#endif
+
+#ifndef DEBUG_LL_UART_BASE
+#error "DEBUG UART is not Configured"
+#endif
+
+#define ASC_TX_BUF_OFF 0x04
+#define ASC_CTRL_OFF 0x0c
+#define ASC_STA_OFF 0x14
+
+#define ASC_STA_TX_FULL (1<<9)
+#define ASC_STA_TX_EMPTY (1<<1)
+
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =DEBUG_LL_UART_BASE @ physical base
+ ldr \rv, =VIRT_ADDRESS(DEBUG_LL_UART_BASE) @ virt base
+ .endm
+
+ .macro senduart,rd,rx
+ strb \rd, [\rx, #ASC_TX_BUF_OFF]
+ .endm
+
+ .macro waituart,rd,rx
+1001: ldr \rd, [\rx, #ASC_STA_OFF]
+ tst \rd, #ASC_STA_TX_FULL
+ bne 1001b
+ .endm
+
+ .macro busyuart,rd,rx
+1001: ldr \rd, [\rx, #ASC_STA_OFF]
+ tst \rd, #ASC_STA_TX_EMPTY
+ beq 1001b
+ .endm
diff --git a/arch/arm/include/debug/tegra.S b/arch/arm/include/debug/tegra.S
new file mode 100644
index 0000000..3bc8059
--- /dev/null
+++ b/arch/arm/include/debug/tegra.S
@@ -0,0 +1,226 @@
+/*
+ * Copyright (C) 2010,2011 Google, Inc.
+ * Copyright (C) 2011-2012 NVIDIA CORPORATION. All Rights Reserved.
+ *
+ * Author:
+ * Colin Cross <ccross@google.com>
+ * Erik Gilling <konkers@google.com>
+ * Doug Anderson <dianders@chromium.org>
+ * Stephen Warren <swarren@nvidia.com>
+ *
+ * Portions based on mach-omap2's debug-macro.S
+ * Copyright (C) 1994-1999 Russell King
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/serial_reg.h>
+
+#define UART_SHIFT 2
+
+/* Physical addresses */
+#define TEGRA_CLK_RESET_BASE 0x60006000
+#define TEGRA_APB_MISC_BASE 0x70000000
+#define TEGRA_UARTA_BASE 0x70006000
+#define TEGRA_UARTB_BASE 0x70006040
+#define TEGRA_UARTC_BASE 0x70006200
+#define TEGRA_UARTD_BASE 0x70006300
+#define TEGRA_UARTE_BASE 0x70006400
+#define TEGRA_PMC_BASE 0x7000e400
+
+#define TEGRA_CLK_RST_DEVICES_L (TEGRA_CLK_RESET_BASE + 0x04)
+#define TEGRA_CLK_RST_DEVICES_H (TEGRA_CLK_RESET_BASE + 0x08)
+#define TEGRA_CLK_RST_DEVICES_U (TEGRA_CLK_RESET_BASE + 0x0c)
+#define TEGRA_CLK_OUT_ENB_L (TEGRA_CLK_RESET_BASE + 0x10)
+#define TEGRA_CLK_OUT_ENB_H (TEGRA_CLK_RESET_BASE + 0x14)
+#define TEGRA_CLK_OUT_ENB_U (TEGRA_CLK_RESET_BASE + 0x18)
+#define TEGRA_PMC_SCRATCH20 (TEGRA_PMC_BASE + 0xa0)
+#define TEGRA_APB_MISC_GP_HIDREV (TEGRA_APB_MISC_BASE + 0x804)
+
+/*
+ * Must be section-aligned since a section mapping is used early on.
+ * Must not overlap with regions in mach-tegra/io.c:tegra_io_desc[].
+ */
+#define UART_VIRTUAL_BASE 0xfe800000
+
+#define checkuart(rp, rv, lhu, bit, uart) \
+ /* Load address of CLK_RST register */ \
+ ldr rp, =TEGRA_CLK_RST_DEVICES_##lhu ; \
+ /* Load value from CLK_RST register */ \
+ ldr rp, [rp, #0] ; \
+ /* Test UART's reset bit */ \
+ tst rp, #(1 << bit) ; \
+ /* If set, can't use UART; jump to save no UART */ \
+ bne 90f ; \
+ /* Load address of CLK_OUT_ENB register */ \
+ ldr rp, =TEGRA_CLK_OUT_ENB_##lhu ; \
+ /* Load value from CLK_OUT_ENB register */ \
+ ldr rp, [rp, #0] ; \
+ /* Test UART's clock enable bit */ \
+ tst rp, #(1 << bit) ; \
+ /* If clear, can't use UART; jump to save no UART */ \
+ beq 90f ; \
+ /* Passed all tests, load address of UART registers */ \
+ ldr rp, =TEGRA_UART##uart##_BASE ; \
+ /* Jump to save UART address */ \
+ b 91f
+
+ .macro addruart, rp, rv, tmp
+ adr \rp, 99f @ actual addr of 99f
+ ldr \rv, [\rp] @ linked addr is stored there
+ sub \rv, \rv, \rp @ offset between the two
+ ldr \rp, [\rp, #4] @ linked tegra_uart_config
+ sub \tmp, \rp, \rv @ actual tegra_uart_config
+ ldr \rp, [\tmp] @ Load tegra_uart_config
+ cmp \rp, #1 @ needs initialization?
+ bne 100f @ no; go load the addresses
+ mov \rv, #0 @ yes; record init is done
+ str \rv, [\tmp]
+
+#ifdef CONFIG_TEGRA_DEBUG_UART_AUTO_ODMDATA
+ /* Check ODMDATA */
+10: ldr \rp, =TEGRA_PMC_SCRATCH20
+ ldr \rp, [\rp, #0] @ Load PMC_SCRATCH20
+ lsr \rv, \rp, #18 @ 19:18 are console type
+ and \rv, \rv, #3
+ cmp \rv, #2 @ 2 and 3 mean DCC, UART
+ beq 11f @ some boards swap the meaning
+ cmp \rv, #3 @ so accept either
+ bne 90f
+11: lsr \rv, \rp, #15 @ 17:15 are UART ID
+ and \rv, #7
+ cmp \rv, #0 @ UART 0?
+ beq 20f
+ cmp \rv, #1 @ UART 1?
+ beq 21f
+ cmp \rv, #2 @ UART 2?
+ beq 22f
+ cmp \rv, #3 @ UART 3?
+ beq 23f
+ cmp \rv, #4 @ UART 4?
+ beq 24f
+ b 90f @ invalid
+#endif
+
+#if defined(CONFIG_TEGRA_DEBUG_UARTA) || \
+ defined(CONFIG_TEGRA_DEBUG_UART_AUTO_ODMDATA)
+ /* Check UART A validity */
+20: checkuart(\rp, \rv, L, 6, A)
+#endif
+
+#if defined(CONFIG_TEGRA_DEBUG_UARTB) || \
+ defined(CONFIG_TEGRA_DEBUG_UART_AUTO_ODMDATA)
+ /* Check UART B validity */
+21: checkuart(\rp, \rv, L, 7, B)
+#endif
+
+#if defined(CONFIG_TEGRA_DEBUG_UARTC) || \
+ defined(CONFIG_TEGRA_DEBUG_UART_AUTO_ODMDATA)
+ /* Check UART C validity */
+22: checkuart(\rp, \rv, H, 23, C)
+#endif
+
+#if defined(CONFIG_TEGRA_DEBUG_UARTD) || \
+ defined(CONFIG_TEGRA_DEBUG_UART_AUTO_ODMDATA)
+ /* Check UART D validity */
+23: checkuart(\rp, \rv, U, 1, D)
+#endif
+
+#if defined(CONFIG_TEGRA_DEBUG_UARTE) || \
+ defined(CONFIG_TEGRA_DEBUG_UART_AUTO_ODMDATA)
+ /* Check UART E validity */
+24:
+ checkuart(\rp, \rv, U, 2, E)
+#endif
+
+ /* No valid UART found */
+90: mov \rp, #0
+ /* fall through */
+
+ /* Record whichever UART we chose */
+91: str \rp, [\tmp, #4] @ Store in tegra_uart_phys
+ cmp \rp, #0 @ Valid UART address?
+ bne 92f @ Yes, go process it
+ str \rp, [\tmp, #8] @ Store 0 in tegra_uart_virt
+ b 100f @ Done
+92: and \rv, \rp, #0xffffff @ offset within 1MB section
+ add \rv, \rv, #UART_VIRTUAL_BASE
+ str \rv, [\tmp, #8] @ Store in tegra_uart_virt
+ b 100f
+
+ .align
+99: .word .
+ .word tegra_uart_config
+ .ltorg
+
+ /* Load previously selected UART address */
+100: ldr \rp, [\tmp, #4] @ Load tegra_uart_phys
+ ldr \rv, [\tmp, #8] @ Load tegra_uart_virt
+ .endm
+
+/*
+ * Code below is swiped from <asm/hardware/debug-8250.S>, but add an extra
+ * check to make sure that the UART address is actually valid.
+ */
+
+ .macro senduart, rd, rx
+ cmp \rx, #0
+ strneb \rd, [\rx, #UART_TX << UART_SHIFT]
+1001:
+ .endm
+
+ .macro busyuart, rd, rx
+ cmp \rx, #0
+ beq 1002f
+1001: ldrb \rd, [\rx, #UART_LSR << UART_SHIFT]
+ and \rd, \rd, #UART_LSR_THRE
+ teq \rd, #UART_LSR_THRE
+ bne 1001b
+1002:
+ .endm
+
+ .macro waituart, rd, rx
+#ifdef FLOW_CONTROL
+ cmp \rx, #0
+ beq 1002f
+1001: ldrb \rd, [\rx, #UART_MSR << UART_SHIFT]
+ tst \rd, #UART_MSR_CTS
+ beq 1001b
+1002:
+#endif
+ .endm
+
+/*
+ * Storage for the state maintained by the macros above.
+ *
+ * In the kernel proper, this data is located in arch/arm/mach-tegra/tegra.c.
+ * That's because this header is included from multiple files, and we only
+ * want a single copy of the data. In particular, the UART probing code above
+ * assumes it's running using physical addresses. This is true when this file
+ * is included from head.o, but not when included from debug.o. So we need
+ * to share the probe results between the two copies, rather than having
+ * to re-run the probing again later.
+ *
+ * In the decompressor, we put the symbol/storage right here, since common.c
+ * isn't included in the decompressor build. This symbol gets put in .text
+ * even though it's really data, since .data is discarded from the
+ * decompressor. Luckily, .text is writeable in the decompressor, unless
+ * CONFIG_ZBOOT_ROM. That dependency is handled in arch/arm/Kconfig.debug.
+ */
+#if defined(ZIMAGE)
+tegra_uart_config:
+ /* Debug UART initialization required */
+ .word 1
+ /* Debug UART physical address */
+ .word 0
+ /* Debug UART virtual address */
+ .word 0
+#endif
diff --git a/arch/arm/include/debug/uncompress.h b/arch/arm/include/debug/uncompress.h
new file mode 100644
index 0000000..ff0b227
--- /dev/null
+++ b/arch/arm/include/debug/uncompress.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifdef CONFIG_DEBUG_UNCOMPRESS
+extern void putc(int c);
+#else
+static inline void putc(int c) {}
+#endif
+static inline void flush(void) {}
+static inline void arch_decomp_setup(void) {}
diff --git a/arch/arm/include/debug/ux500.S b/arch/arm/include/debug/ux500.S
new file mode 100644
index 0000000..aa7f63a
--- /dev/null
+++ b/arch/arm/include/debug/ux500.S
@@ -0,0 +1,48 @@
+/*
+ * Debugging macro include header
+ *
+ * Copyright (C) 2009 ST-Ericsson
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+
+#if CONFIG_UX500_DEBUG_UART > 2
+#error Invalid Ux500 debug UART
+#endif
+
+/*
+ * DEBUG_LL only works if only one SOC is built in. We don't use #else below
+ * in order to get "__UX500_UART redefined" warnings if more than one SOC is
+ * built, so that there's some hint during the build that something is wrong.
+ */
+
+#ifdef CONFIG_UX500_SOC_DB8500
+#define U8500_UART0_PHYS_BASE (0x80120000)
+#define U8500_UART1_PHYS_BASE (0x80121000)
+#define U8500_UART2_PHYS_BASE (0x80007000)
+#define U8500_UART0_VIRT_BASE (0xf8120000)
+#define U8500_UART1_VIRT_BASE (0xf8121000)
+#define U8500_UART2_VIRT_BASE (0xf8007000)
+#define __UX500_PHYS_UART(n) U8500_UART##n##_PHYS_BASE
+#define __UX500_VIRT_UART(n) U8500_UART##n##_VIRT_BASE
+#endif
+
+#if !defined(__UX500_PHYS_UART) || !defined(__UX500_VIRT_UART)
+#error Unknown SOC
+#endif
+
+#define UX500_PHYS_UART(n) __UX500_PHYS_UART(n)
+#define UX500_VIRT_UART(n) __UX500_VIRT_UART(n)
+#define UART_PHYS_BASE UX500_PHYS_UART(CONFIG_UX500_DEBUG_UART)
+#define UART_VIRT_BASE UX500_VIRT_UART(CONFIG_UX500_DEBUG_UART)
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =UART_PHYS_BASE @ no, physical address
+ ldr \rv, =UART_VIRT_BASE @ yes, virtual address
+ .endm
+
+#include <debug/pl01x.S>
diff --git a/arch/arm/include/debug/vexpress.S b/arch/arm/include/debug/vexpress.S
new file mode 100644
index 0000000..524acd5
--- /dev/null
+++ b/arch/arm/include/debug/vexpress.S
@@ -0,0 +1,51 @@
+/* arch/arm/mach-realview/include/mach/debug-macro.S
+ *
+ * Debugging macro include header
+ *
+ * Copyright (C) 1994-1999 Russell King
+ * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#define DEBUG_LL_PHYS_BASE 0x10000000
+#define DEBUG_LL_UART_OFFSET 0x00009000
+
+#define DEBUG_LL_PHYS_BASE_RS1 0x1c000000
+#define DEBUG_LL_UART_OFFSET_RS1 0x00090000
+
+#define DEBUG_LL_UART_PHYS_CRX 0xb0090000
+
+#define DEBUG_LL_VIRT_BASE 0xf8000000
+
+#if defined(CONFIG_DEBUG_VEXPRESS_UART0_DETECT)
+
+ .macro addruart,rp,rv,tmp
+ .arch armv7-a
+
+ @ Make an educated guess regarding the memory map:
+ @ - the original A9 core tile (based on ARM Cortex-A9 r0p1)
+ @ should use UART at 0x10009000
+ @ - all other (RS1 complaint) tiles use UART mapped
+ @ at 0x1c090000
+ mrc p15, 0, \rp, c0, c0, 0
+ movw \rv, #0xc091
+ movt \rv, #0x410f
+ cmp \rp, \rv
+
+ @ Original memory map
+ moveq \rp, #DEBUG_LL_UART_OFFSET
+ orreq \rv, \rp, #DEBUG_LL_VIRT_BASE
+ orreq \rp, \rp, #DEBUG_LL_PHYS_BASE
+
+ @ RS1 memory map
+ movne \rp, #DEBUG_LL_UART_OFFSET_RS1
+ orrne \rv, \rp, #DEBUG_LL_VIRT_BASE
+ orrne \rp, \rp, #DEBUG_LL_PHYS_BASE_RS1
+
+ .endm
+
+#include <debug/pl01x.S>
+#endif
diff --git a/arch/arm/include/debug/vf.S b/arch/arm/include/debug/vf.S
new file mode 100644
index 0000000..b889338
--- /dev/null
+++ b/arch/arm/include/debug/vf.S
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2013 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#define VF_UART0_BASE_ADDR 0x40027000
+#define VF_UART1_BASE_ADDR 0x40028000
+#define VF_UART2_BASE_ADDR 0x40029000
+#define VF_UART3_BASE_ADDR 0x4002a000
+#define VF_UART_BASE_ADDR(n) VF_UART##n##_BASE_ADDR
+#define VF_UART_BASE(n) VF_UART_BASE_ADDR(n)
+#define VF_UART_PHYSICAL_BASE VF_UART_BASE(CONFIG_DEBUG_VF_UART_PORT)
+
+#define VF_UART_VIRTUAL_BASE 0xfe000000
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =VF_UART_PHYSICAL_BASE @ physical
+ and \rv, \rp, #0xffffff @ offset within 16MB section
+ add \rv, \rv, #VF_UART_VIRTUAL_BASE
+ .endm
+
+ .macro senduart, rd, rx
+ strb \rd, [\rx, #0x7] @ Data Register
+ .endm
+
+ .macro busyuart, rd, rx
+1001: ldrb \rd, [\rx, #0x4] @ Status Register 1
+ tst \rd, #1 << 6 @ TC
+ beq 1001b @ wait until transmit done
+ .endm
+
+ .macro waituart,rd,rx
+ .endm
diff --git a/arch/arm/include/debug/vt8500.S b/arch/arm/include/debug/vt8500.S
new file mode 100644
index 0000000..0e0ca08
--- /dev/null
+++ b/arch/arm/include/debug/vt8500.S
@@ -0,0 +1,37 @@
+/*
+ * Debugging macro include header
+ *
+ * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com>
+ * Moved from arch/arm/mach-vt8500/include/mach/debug-macro.S
+ * Minor changes for readability.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#define DEBUG_LL_PHYS_BASE 0xD8000000
+#define DEBUG_LL_VIRT_BASE 0xF8000000
+#define DEBUG_LL_UART_OFFSET 0x00200000
+
+#if defined(CONFIG_DEBUG_VT8500_UART0)
+ .macro addruart, rp, rv, tmp
+ mov \rp, #DEBUG_LL_UART_OFFSET
+ orr \rv, \rp, #DEBUG_LL_VIRT_BASE
+ orr \rp, \rp, #DEBUG_LL_PHYS_BASE
+ .endm
+
+ .macro senduart,rd,rx
+ strb \rd, [\rx, #0]
+ .endm
+
+ .macro busyuart,rd,rx
+1001: ldr \rd, [\rx, #0x1c]
+ ands \rd, \rd, #0x2
+ bne 1001b
+ .endm
+
+ .macro waituart,rd,rx
+ .endm
+
+#endif
diff --git a/arch/arm/include/debug/zynq.S b/arch/arm/include/debug/zynq.S
new file mode 100644
index 0000000..060cb5b
--- /dev/null
+++ b/arch/arm/include/debug/zynq.S
@@ -0,0 +1,56 @@
+/*
+ * Debugging macro include header
+ *
+ * Copyright (C) 2011 Xilinx
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#define UART_CR_OFFSET 0x00 /* Control Register [8:0] */
+#define UART_SR_OFFSET 0x2C /* Channel Status [11:0] */
+#define UART_FIFO_OFFSET 0x30 /* FIFO [15:0] or [7:0] */
+
+#define UART_SR_TXFULL 0x00000010 /* TX FIFO full */
+#define UART_SR_TXEMPTY 0x00000008 /* TX FIFO empty */
+
+#define UART0_PHYS 0xE0000000
+#define UART0_VIRT 0xF0800000
+#define UART1_PHYS 0xE0001000
+#define UART1_VIRT 0xF0801000
+
+#if IS_ENABLED(CONFIG_DEBUG_ZYNQ_UART1)
+# define LL_UART_PADDR UART1_PHYS
+# define LL_UART_VADDR UART1_VIRT
+#else
+# define LL_UART_PADDR UART0_PHYS
+# define LL_UART_VADDR UART0_VIRT
+#endif
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =LL_UART_PADDR @ physical
+ ldr \rv, =LL_UART_VADDR @ virtual
+ .endm
+
+ .macro senduart,rd,rx
+ strb \rd, [\rx, #UART_FIFO_OFFSET] @ TXDATA
+ .endm
+
+ .macro waituart,rd,rx
+1001: ldr \rd, [\rx, #UART_SR_OFFSET]
+ARM_BE8( rev \rd, \rd )
+ tst \rd, #UART_SR_TXEMPTY
+ beq 1001b
+ .endm
+
+ .macro busyuart,rd,rx
+1002: ldr \rd, [\rx, #UART_SR_OFFSET] @ get status register
+ARM_BE8( rev \rd, \rd )
+ tst \rd, #UART_SR_TXFULL @
+ bne 1002b @ wait if FIFO is full
+ .endm