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/* arch/arm/mach-omap1/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 <linux/serial_reg.h>
#include <plat/serial.h>
.pushsection .data
omap_uart_phys: .word 0x0
omap_uart_virt: .word 0x0
* Note that this code won't work if the bootloader passes
* a wrong machine ID number in r1. To debug, just hardcode
* the desired UART phys and virt addresses temporarily into
* the omap_uart_phys and omap_uart_virt above.
.macro addruart, rp, rv, tmp
/* Use omap_uart_phys/virt if already configured */
9: 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
/* Check the debug UART configuration set in uncompress.h */
and \rp, pc, #0xff000000
ldr \rp, [\rp, \rv]
/* Select the UART to use based on the UART1 scratchpad value */
10: cmp \rp, #0 @ no port configured?
beq 11f @ if none, try to use UART1
cmp \rp, #OMAP1UART1
beq 11f @ configure OMAP1UART1
cmp \rp, #OMAP1UART2
beq 12f @ configure OMAP1UART2
cmp \rp, #OMAP1UART3
beq 13f @ configure OMAP2UART3
/* Configure the UART offset from the phys/virt base */
11: mov \rp, #0x00fb0000 @ OMAP1UART1
b 98f
12: mov \rp, #0x00fb0000 @ OMAP1UART1
orr \rp, \rp, #0x00000800 @ OMAP1UART2
b 98f
13: mov \rp, #0x00fb0000 @ OMAP1UART1
orr \rp, \rp, #0x00000800 @ OMAP1UART2
orr \rp, \rp, #0x00009000 @ OMAP1UART3
/* Store both phys and virt address for the uart */
98: add \rp, \rp, #0xff000000 @ phys base
str \rp, [\tmp, #0] @ omap_uart_phys
sub \rp, \rp, #0xff000000 @ phys base
add \rp, \rp, #0xfe000000 @ virt base
str \rp, [\tmp, #4] @ omap_uart_virt
b 9b
99: .word .
.word omap_uart_phys
.macro senduart,rd,rx
strb \rd, [\rx]
.macro busyuart,rd,rx
1001: ldrb \rd, [\rx, #(UART_LSR << OMAP_PORT_SHIFT)]
and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
beq 1002f
ldrb \rd, [\rx, #(UART_LSR << OMAP7XX_PORT_SHIFT)]
and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
bne 1001b
.macro waituart,rd,rx