From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/arm/include/debug/at91.S | 52 ++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 kernel/arch/arm/include/debug/at91.S (limited to 'kernel/arch/arm/include/debug/at91.S') diff --git a/kernel/arch/arm/include/debug/at91.S b/kernel/arch/arm/include/debug/at91.S new file mode 100644 index 000000000..c3c45e628 --- /dev/null +++ b/kernel/arch/arm/include/debug/at91.S @@ -0,0 +1,52 @@ +/* + * Copyright (C) 2003-2005 SAN People + * + * Debugging macro include header + * + * 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. + * +*/ + +#if defined(CONFIG_AT91_DEBUG_LL_DBGU0) +#define AT91_DBGU 0xfffff200 /* AT91_BASE_DBGU0 */ +#elif defined(CONFIG_AT91_DEBUG_LL_DBGU1) +#define AT91_DBGU 0xffffee00 /* AT91_BASE_DBGU1 */ +#else +/* On sama5d4, use USART3 as low level serial console */ +#define AT91_DBGU 0xfc00c000 /* SAMA5D4_BASE_USART3 */ +#endif + +#ifdef CONFIG_MMU +#define AT91_IO_P2V(x) ((x) - 0x01000000) +#else +#define AT91_IO_P2V(x) (x) +#endif + +#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, =AT91_DBGU @ System peripherals (phys address) + ldr \rv, =AT91_IO_P2V(AT91_DBGU) @ System peripherals (virt address) + .endm + + .macro senduart,rd,rx + strb \rd, [\rx, #(AT91_DBGU_THR)] @ Write to Transmitter Holding Register + .endm + + .macro waituart,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 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 + -- cgit 1.2.3-korg