LXR linux/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
  18volatile u32* uart_base;
  19
  20static 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
  30static void flush(void)
  31{
  32}
  33
  34static __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
  53