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Diffstat (limited to 'arch/arm/include/debug/zynq.S')
| -rw-r--r-- | arch/arm/include/debug/zynq.S | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/arm/include/debug/zynq.S b/arch/arm/include/debug/zynq.S new file mode 100644 index 000000000..060cb5b49 --- /dev/null +++ b/arch/arm/include/debug/zynq.S @@ -0,0 +1,56 @@ +/* + * Debugging macro include header + * + * Copyright (C) 2011 Xilinx + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#define UART_CR_OFFSET 0x00 /* Control Register [8:0] */ +#define UART_SR_OFFSET 0x2C /* Channel Status [11:0] */ +#define UART_FIFO_OFFSET 0x30 /* FIFO [15:0] or [7:0] */ + +#define UART_SR_TXFULL 0x00000010 /* TX FIFO full */ +#define UART_SR_TXEMPTY 0x00000008 /* TX FIFO empty */ + +#define UART0_PHYS 0xE0000000 +#define UART0_VIRT 0xF0800000 +#define UART1_PHYS 0xE0001000 +#define UART1_VIRT 0xF0801000 + +#if IS_ENABLED(CONFIG_DEBUG_ZYNQ_UART1) +# define LL_UART_PADDR UART1_PHYS +# define LL_UART_VADDR UART1_VIRT +#else +# define LL_UART_PADDR UART0_PHYS +# define LL_UART_VADDR UART0_VIRT +#endif + + .macro addruart, rp, rv, tmp + ldr \rp, =LL_UART_PADDR @ physical + ldr \rv, =LL_UART_VADDR @ virtual + .endm + + .macro senduart,rd,rx + strb \rd, [\rx, #UART_FIFO_OFFSET] @ TXDATA + .endm + + .macro waituart,rd,rx +1001: ldr \rd, [\rx, #UART_SR_OFFSET] +ARM_BE8( rev \rd, \rd ) + tst \rd, #UART_SR_TXEMPTY + beq 1001b + .endm + + .macro busyuart,rd,rx +1002: ldr \rd, [\rx, #UART_SR_OFFSET] @ get status register +ARM_BE8( rev \rd, \rd ) + tst \rd, #UART_SR_TXFULL @ + bne 1002b @ wait if FIFO is full + .endm |