diff options
Diffstat (limited to 'include/asm-arm/arch-s3c2410/debug-macro.S')
| -rw-r--r-- | include/asm-arm/arch-s3c2410/debug-macro.S | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/include/asm-arm/arch-s3c2410/debug-macro.S b/include/asm-arm/arch-s3c2410/debug-macro.S new file mode 100644 index 00000000000..abfbe45cd17 --- /dev/null +++ b/include/asm-arm/arch-s3c2410/debug-macro.S @@ -0,0 +1,99 @@ +/* linux/include/asm-arm/arch-s3c2410/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. + * + * Modifications: + * 10-Mar-2005 LCVR Changed S3C2410_VA to S3C24XX_VA +*/ + +#include <asm/arch/map.h> +#include <asm/arch/regs-serial.h> +#include <asm/arch/regs-gpio.h> + +#define S3C2410_UART1_OFF (0x4000) +#define SHIFT_2440TXF (14-9) + + .macro addruart, rx + mrc p15, 0, \rx, c1, c0 + tst \rx, #1 + ldreq \rx, = S3C2410_PA_UART + ldrne \rx, = S3C24XX_VA_UART +#if CONFIG_DEBUG_S3C2410_UART != 0 + add \rx, \rx, #(S3C2410_UART1_OFF * CONFIG_DEBUG_S3C2410_UART) +#endif + .endm + + .macro senduart,rd,rx + str \rd, [\rx, # S3C2410_UTXH ] + .endm + + .macro busyuart, rd, rx + ldr \rd, [ \rx, # S3C2410_UFCON ] + tst \rd, #S3C2410_UFCON_FIFOMODE @ fifo enabled? + beq 1001f @ + @ FIFO enabled... +1003: + mrc p15, 0, \rd, c1, c0 + tst \rd, #1 + addeq \rd, \rx, #(S3C2410_PA_GPIO - S3C2410_PA_UART) + addne \rd, \rx, #(S3C24XX_VA_GPIO - S3C24XX_VA_UART) + bic \rd, \rd, #0xff000 + ldr \rd, [ \rd, # S3C2410_GSTATUS1 - S3C2410_GPIOREG(0) ] + and \rd, \rd, #0x00ff0000 + teq \rd, #0x00440000 @ is it 2440? + + ldr \rd, [ \rx, # S3C2410_UFSTAT ] + moveq \rd, \rd, lsr #SHIFT_2440TXF + tst \rd, #S3C2410_UFSTAT_TXFULL + bne 1003b + b 1002f + +1001: + @ busy waiting for non fifo + ldr \rd, [ \rx, # S3C2410_UTRSTAT ] + tst \rd, #S3C2410_UTRSTAT_TXFE + beq 1001b + +1002: @ exit busyuart + .endm + + .macro waituart,rd,rx + + ldr \rd, [ \rx, # S3C2410_UFCON ] + tst \rd, #S3C2410_UFCON_FIFOMODE @ fifo enabled? + beq 1001f @ + @ FIFO enabled... +1003: + mrc p15, 0, \rd, c1, c0 + tst \rd, #1 + addeq \rd, \rx, #(S3C2410_PA_GPIO - S3C2410_PA_UART) + addne \rd, \rx, #(S3C24XX_VA_GPIO - S3C24XX_VA_UART) + bic \rd, \rd, #0xff000 + ldr \rd, [ \rd, # S3C2410_GSTATUS1 - S3C2410_GPIOREG(0) ] + and \rd, \rd, #0x00ff0000 + teq \rd, #0x00440000 @ is it 2440? + + ldr \rd, [ \rx, # S3C2410_UFSTAT ] + andne \rd, \rd, #S3C2410_UFSTAT_TXMASK + andeq \rd, \rd, #S3C2440_UFSTAT_TXMASK + teq \rd, #0 + bne 1003b + b 1002f + +1001: + @ idle waiting for non fifo + ldr \rd, [ \rx, # S3C2410_UTRSTAT ] + tst \rd, #S3C2410_UTRSTAT_TXFE + beq 1001b + +1002: @ exit busyuart + .endm |