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kernel/linux-rt-4.4.41/arch/arm/include/debug/sirf.S 824 Bytes
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  /*
   * arch/arm/mach-prima2/include/mach/debug-macro.S
   *
   * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
   *
   * Licensed under GPLv2 or later.
   */
  
  #define SIRF_LLUART_TXFIFO_STATUS	0x0114
  #define SIRF_LLUART_TXFIFO_DATA	0x0118
  
  #define SIRF_LLUART_TXFIFO_FULL                       (1 << 5)
  
  #ifdef CONFIG_DEBUG_SIRFATLAS7_UART0
  #define SIRF_LLUART_TXFIFO_EMPTY			(1 << 8)
  #else
  #define SIRF_LLUART_TXFIFO_EMPTY			(1 << 6)
  #endif
  
  
  	.macro	addruart, rp, rv, tmp
  	ldr	\rp, =CONFIG_DEBUG_UART_PHYS		@ physical
  	ldr	\rv, =CONFIG_DEBUG_UART_VIRT		@ virtual
  	.endm
  
  	.macro	senduart,rd,rx
  	str	\rd, [\rx, #SIRF_LLUART_TXFIFO_DATA]
  	.endm
  
  	.macro	busyuart,rd,rx
  	.endm
  
  	.macro	waituart,rd,rx
  1001:	ldr	\rd, [\rx, #SIRF_LLUART_TXFIFO_STATUS]
  	tst	\rd, #SIRF_LLUART_TXFIFO_EMPTY
  	beq	1001b
  	.endm