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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
| commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
| tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /arch/arm/include/debug/8250.S | |
| parent | Initial commit. (diff) | |
| download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip | |
Adding upstream version 4.19.249.upstream/4.19.249upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/include/debug/8250.S')
| -rw-r--r-- | arch/arm/include/debug/8250.S | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/arch/arm/include/debug/8250.S b/arch/arm/include/debug/8250.S new file mode 100644 index 000000000..7f7446f6f --- /dev/null +++ b/arch/arm/include/debug/8250.S @@ -0,0 +1,57 @@ +/* + * arch/arm/include/debug/8250.S + * + * Copyright (C) 1994-2013 Russell King + * + * 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> + + .macro addruart, rp, rv, tmp + ldr \rp, =CONFIG_DEBUG_UART_PHYS + ldr \rv, =CONFIG_DEBUG_UART_VIRT + .endm + +#ifdef CONFIG_DEBUG_UART_8250_WORD + .macro store, rd, rx:vararg + ARM_BE8(rev \rd, \rd) + str \rd, \rx + ARM_BE8(rev \rd, \rd) + .endm + + .macro load, rd, rx:vararg + ldr \rd, \rx + ARM_BE8(rev \rd, \rd) + .endm +#else + .macro store, rd, rx:vararg + strb \rd, \rx + .endm + + .macro load, rd, rx:vararg + ldrb \rd, \rx + .endm +#endif + +#define UART_SHIFT CONFIG_DEBUG_UART_8250_SHIFT + + .macro senduart,rd,rx + store \rd, [\rx, #UART_TX << UART_SHIFT] + .endm + + .macro busyuart,rd,rx +1002: load \rd, [\rx, #UART_LSR << UART_SHIFT] + and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE + teq \rd, #UART_LSR_TEMT | UART_LSR_THRE + bne 1002b + .endm + + .macro waituart,rd,rx +#ifdef CONFIG_DEBUG_UART_8250_FLOW_CONTROL +1001: load \rd, [\rx, #UART_MSR << UART_SHIFT] + tst \rd, #UART_MSR_CTS + beq 1001b +#endif + .endm |