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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
| commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
| tree | a94efe259b9009378be6d90eb30d2b019d95c194 /arch/arm/include/debug/at91.S | |
| parent | Initial commit. (diff) | |
| download | linux-430c2fc249ea5c0536abd21c23382884005c9093.tar.xz linux-430c2fc249ea5c0536abd21c23382884005c9093.zip | |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/include/debug/at91.S')
| -rw-r--r-- | arch/arm/include/debug/at91.S | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/arm/include/debug/at91.S b/arch/arm/include/debug/at91.S new file mode 100644 index 000000000..17722824e --- /dev/null +++ b/arch/arm/include/debug/at91.S @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2003-2005 SAN People + * + * Debugging macro include header +*/ + +#define AT91_DBGU_SR (0x14) /* Status Register */ +#define AT91_DBGU_THR (0x1c) /* Transmitter Holding Register */ +#define AT91_DBGU_TXRDY (1 << 1) /* Transmitter Ready */ +#define AT91_DBGU_TXEMPTY (1 << 9) /* Transmitter Empty */ + + .macro addruart, rp, rv, tmp + ldr \rp, =CONFIG_DEBUG_UART_PHYS @ System peripherals (phys address) + ldr \rv, =CONFIG_DEBUG_UART_VIRT @ System peripherals (virt address) + .endm + + .macro senduart,rd,rx + strb \rd, [\rx, #(AT91_DBGU_THR)] @ Write to Transmitter Holding Register + .endm + + .macro waituarttxrdy,rd,rx +1001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register + tst \rd, #AT91_DBGU_TXRDY @ DBGU_TXRDY = 1 when ready to transmit + beq 1001b + .endm + + .macro waituartcts,rd,rx + .endm + + .macro busyuart,rd,rx +1001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register + tst \rd, #AT91_DBGU_TXEMPTY @ DBGU_TXEMPTY = 1 when transmission complete + beq 1001b + .endm + |