1b820eaf42
Versatile Express platform can be used in different configurations, the console UART used by early printk may be located at different addresses in the address space. This patch makes it possible to select the base address of a PL011 UART to be used as a console output in the kernel configuration. The default behaviour is still the heuristic detecting memory map on Cortex-A core tiles. The zImage decompressor will use the same configuration values or print out nothing if DEBUG_LL is not enabled. Signed-off-by: Pawel Moll <pawel.moll@arm.com>
85 lines
2 KiB
ArmAsm
85 lines
2 KiB
ArmAsm
/* arch/arm/mach-realview/include/mach/debug-macro.S
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*
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* Debugging macro include header
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*
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* Copyright (C) 1994-1999 Russell King
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* Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#define DEBUG_LL_PHYS_BASE 0x10000000
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#define DEBUG_LL_UART_OFFSET 0x00009000
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#define DEBUG_LL_PHYS_BASE_RS1 0x1c000000
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#define DEBUG_LL_UART_OFFSET_RS1 0x00090000
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#define DEBUG_LL_VIRT_BASE 0xf8000000
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#if defined(CONFIG_DEBUG_VEXPRESS_UART0_DETECT)
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.macro addruart,rp,rv,tmp
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@ Make an educated guess regarding the memory map:
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@ - the original A9 core tile, which has MPCore peripherals
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@ located at 0x1e000000, should use UART at 0x10009000
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@ - all other (RS1 complaint) tiles use UART mapped
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@ at 0x1c090000
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mrc p15, 4, \tmp, c15, c0, 0
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cmp \tmp, #0x1e000000
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@ Original memory map
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moveq \rp, #DEBUG_LL_UART_OFFSET
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orreq \rv, \rp, #DEBUG_LL_VIRT_BASE
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orreq \rp, \rp, #DEBUG_LL_PHYS_BASE
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@ RS1 memory map
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movne \rp, #DEBUG_LL_UART_OFFSET_RS1
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orrne \rv, \rp, #DEBUG_LL_VIRT_BASE
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orrne \rp, \rp, #DEBUG_LL_PHYS_BASE_RS1
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.endm
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#include <asm/hardware/debug-pl01x.S>
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#elif defined(CONFIG_DEBUG_VEXPRESS_UART0_CA9)
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.macro addruart,rp,rv,tmp
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mov \rp, #DEBUG_LL_UART_OFFSET
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orr \rv, \rp, #DEBUG_LL_VIRT_BASE
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orr \rp, \rp, #DEBUG_LL_PHYS_BASE
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.endm
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#include <asm/hardware/debug-pl01x.S>
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#elif defined(CONFIG_DEBUG_VEXPRESS_UART0_RS1)
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.macro addruart,rp,rv,tmp
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mov \rp, #DEBUG_LL_UART_OFFSET_RS1
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orr \rv, \rp, #DEBUG_LL_VIRT_BASE
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orr \rp, \rp, #DEBUG_LL_PHYS_BASE_RS1
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.endm
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#include <asm/hardware/debug-pl01x.S>
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#else /* CONFIG_DEBUG_LL_UART_NONE */
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.macro addruart, rp, rv, tmp
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/* Safe dummy values */
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mov \rp, #0
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mov \rv, #DEBUG_LL_VIRT_BASE
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.endm
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.macro senduart,rd,rx
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.endm
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.macro waituart,rd,rx
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.endm
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.macro busyuart,rd,rx
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.endm
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#endif
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