arch/arm/mach-ixp4xx/include/mach/uncompress.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * arch/arm/mach-ixp4xx/include/mach/uncompress.h
   4  *
   5  * Copyright (C) 2002 Intel Corporation.
   6  * Copyright (C) 2003-2004 MontaVista Software, Inc.
   7  */
   8
   9 #ifndef _ARCH_UNCOMPRESS_H_
  10 #define _ARCH_UNCOMPRESS_H_
  11
  12 #include "ixp4xx-regs.h"
  13 #include <asm/mach-types.h>
  14 #include <linux/serial_reg.h>
  15
  16 #define TX_DONE (UART_LSR_TEMT|UART_LSR_THRE)
  17
  18 volatile u32* uart_base;
  19
  20 static inline void putc(int c)
  21 {
  22         /* Check THRE and TEMT bits before we transmit the character.
  23          */
  24         while ((uart_base[UART_LSR] & TX_DONE) != TX_DONE)
  25                 barrier();
  26
  27         *uart_base = c;
  28 }
  29
  30 static void flush(void)
  31 {
  32 }
  33
  34 static __inline__ void __arch_decomp_setup(unsigned long arch_id)
  35 {
  36         /*
  37          * Some boards are using UART2 as console
  38          */
  39         if (machine_is_adi_coyote() || machine_is_gtwx5715() ||
  40             machine_is_gateway7001() || machine_is_wg302v2() ||
  41             machine_is_devixp() || machine_is_miccpt() || machine_is_mic256())
  42                 uart_base = (volatile u32*) IXP4XX_UART2_BASE_PHYS;
  43         else
  44                 uart_base = (volatile u32*) IXP4XX_UART1_BASE_PHYS;
  45 }
  46
  47 /*
  48  * arch_id is a variable in decompress_kernel()
  49  */
  50 #define arch_decomp_setup()     __arch_decomp_setup(arch_id)
  51
  52 #endif