103 lines
2.5 KiB
ArmAsm
103 lines
2.5 KiB
ArmAsm
/* linux/include/asm-arm/arch-s3c2410/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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* Copyright (C) 2005 Simtec Electronics
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*
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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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#include <asm/arch/map.h>
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#include <asm/arch/regs-serial.h>
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#include <asm/arch/regs-gpio.h>
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#define S3C2410_UART1_OFF (0x4000)
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#define SHIFT_2440TXF (14-9)
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.macro addruart, rx
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mrc p15, 0, \rx, c1, c0
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tst \rx, #1
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ldreq \rx, = S3C24XX_PA_UART
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ldrne \rx, = S3C24XX_VA_UART
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#if CONFIG_DEBUG_S3C2410_UART != 0
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add \rx, \rx, #(S3C2410_UART1_OFF * CONFIG_DEBUG_S3C2410_UART)
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#endif
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.endm
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.macro senduart,rd,rx
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strb \rd, [\rx, # S3C2410_UTXH ]
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.endm
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.macro busyuart, rd, rx
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ldr \rd, [ \rx, # S3C2410_UFCON ]
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tst \rd, #S3C2410_UFCON_FIFOMODE @ fifo enabled?
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beq 1001f @
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@ FIFO enabled...
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1003:
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@ check for arm920 vs arm926. currently assume all arm926
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@ devices have an 64 byte FIFO identical to the s3c2440
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mrc p15, 0, \rd, c0, c0
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and \rd, \rd, #0xff0
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teq \rd, #0x260
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beq 1004f
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mrc p15, 0, \rd, c1, c0
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tst \rd, #1
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addeq \rd, \rx, #(S3C24XX_PA_GPIO - S3C24XX_PA_UART)
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addne \rd, \rx, #(S3C24XX_VA_GPIO - S3C24XX_VA_UART)
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bic \rd, \rd, #0xff000
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ldr \rd, [ \rd, # S3C2410_GSTATUS1 - S3C2410_GPIOREG(0) ]
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and \rd, \rd, #0x00ff0000
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teq \rd, #0x00440000 @ is it 2440?
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1004:
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ldr \rd, [ \rx, # S3C2410_UFSTAT ]
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moveq \rd, \rd, lsr #SHIFT_2440TXF
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tst \rd, #S3C2410_UFSTAT_TXFULL
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bne 1003b
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b 1002f
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1001:
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@ busy waiting for non fifo
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ldr \rd, [ \rx, # S3C2410_UTRSTAT ]
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tst \rd, #S3C2410_UTRSTAT_TXFE
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beq 1001b
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1002: @ exit busyuart
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.endm
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.macro waituart,rd,rx
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ldr \rd, [ \rx, # S3C2410_UFCON ]
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tst \rd, #S3C2410_UFCON_FIFOMODE @ fifo enabled?
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beq 1001f @
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@ FIFO enabled...
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1003:
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mrc p15, 0, \rd, c1, c0
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tst \rd, #1
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addeq \rd, \rx, #(S3C24XX_PA_GPIO - S3C24XX_PA_UART)
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addne \rd, \rx, #(S3C24XX_VA_GPIO - S3C24XX_VA_UART)
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bic \rd, \rd, #0xff000
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ldr \rd, [ \rd, # S3C2410_GSTATUS1 - S3C2410_GPIOREG(0) ]
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and \rd, \rd, #0x00ff0000
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teq \rd, #0x00440000 @ is it 2440?
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ldr \rd, [ \rx, # S3C2410_UFSTAT ]
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andne \rd, \rd, #S3C2410_UFSTAT_TXMASK
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andeq \rd, \rd, #S3C2440_UFSTAT_TXMASK
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teq \rd, #0
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bne 1003b
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b 1002f
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1001:
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@ idle waiting for non fifo
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ldr \rd, [ \rx, # S3C2410_UTRSTAT ]
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tst \rd, #S3C2410_UTRSTAT_TXFE
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beq 1001b
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1002: @ exit busyuart
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.endm
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