mirror of
https://github.com/torvalds/linux.git
synced 2024-12-26 12:52:30 +00:00
eb28d0bb85
Enable ARCH_SUPPORTS_BIG_ENDIAN in Kconfig. zynq_secondary_trampoline is the first function that is called on secondary CPU. Reference: "ARM: mcpm: fix big endian issue in mcpm startup code" (sha1:519ceb9fd1) Fix early printk support. Based on: "ARM: pl01x debug code endian fix" (sha1:76e3faf156) Signed-off-by: Michal Simek <michal.simek@xilinx.com>
57 lines
1.6 KiB
ArmAsm
57 lines
1.6 KiB
ArmAsm
/*
|
|
* 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 0xF0000000
|
|
#define UART1_PHYS 0xE0001000
|
|
#define UART1_VIRT 0xF0001000
|
|
|
|
#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
|
|
str \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
|