root/arch/arm/include/debug/vexpress.S
/* SPDX-License-Identifier: GPL-2.0-only */
/* 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
 */

#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