arch/arm/mach-sa1100/include/mach/uncompress.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * arch/arm/mach-sa1100/include/mach/uncompress.h
   4  *
   5  * (C) 1999 Nicolas Pitre <nico@fluxnic.net>
   6  *
   7  * Reorganised to be machine independent.
   8  */
   9
  10 #include "hardware.h"
  11
  12 #define IOMEM(x)        (x)
  13
  14 /*
  15  * The following code assumes the serial port has already been
  16  * initialized by the bootloader.  We search for the first enabled
  17  * port in the most probable order.  If you didn't setup a port in
  18  * your bootloader then nothing will appear (which might be desired).
  19  */
  20
  21 #define UART(x)         (*(volatile unsigned long *)(serial_port + (x)))
  22
  23 static inline void putc(int c)
  24 {
  25         unsigned long serial_port;
  26
  27         do {
  28                 serial_port = _Ser3UTCR0;
  29                 if (UART(UTCR3) & UTCR3_TXE) break;
  30                 serial_port = _Ser1UTCR0;
  31                 if (UART(UTCR3) & UTCR3_TXE) break;
  32                 serial_port = _Ser2UTCR0;
  33                 if (UART(UTCR3) & UTCR3_TXE) break;
  34                 return;
  35         } while (0);
  36
  37         /* wait for space in the UART's transmitter */
  38         while (!(UART(UTSR1) & UTSR1_TNF))
  39                 barrier();
  40
  41         /* send the character out. */
  42         UART(UTDR) = c;
  43 }
  44
  45 static inline void flush(void)
  46 {
  47 }
  48
  49 /*
  50  * Nothing to do for these
  51  */
  52 #define arch_decomp_setup()