arch/arm26/lib/io-acorn.S

   1 /*
   2  *  linux/arch/arm26/lib/io-acorn.S
   3  *
   4  *  Copyright (C) 1995, 1996 Russell King
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #include <linux/config.h> /* for CONFIG_CPU_nn */
  11 #include <linux/linkage.h>
  12 #include <asm/assembler.h>
  13 #include <asm/hardware.h>
  14
  15                 .text
  16                 .align
  17
  18                 .equ    diff_pcio_base, PCIO_BASE - IO_BASE
  19
  20                 .macro  outw2   rd
  21                 mov     r8, \rd, lsl #16
  22                 orr     r8, r8, r8, lsr #16
  23                 str     r8, [r3, r0, lsl #2]
  24                 mov     r8, \rd, lsr #16
  25                 orr     r8, r8, r8, lsl #16
  26                 str     r8, [r3, r0, lsl #2]
  27                 .endm
  28
  29                 .macro  inw2    rd, mask, temp
  30                 ldr     \rd, [r0]
  31                 and     \rd, \rd, \mask
  32                 ldr     \temp, [r0]
  33                 orr     \rd, \rd, \temp, lsl #16
  34                 .endm
  35
  36                 .macro  addr    rd
  37                 tst     \rd, #0x80000000
  38                 mov     \rd, \rd, lsl #2
  39                 add     \rd, \rd, #IO_BASE
  40                 addeq   \rd, \rd, #diff_pcio_base
  41                 .endm
  42
  43 .iosl_warning:
  44                 .ascii  "<4>insl/outsl not implemented, called from %08lX\0"
  45                 .align
  46
  47 /*
  48  * These make no sense on Acorn machines.
  49  * Print a warning message.
  50  */
  51 ENTRY(insl)
  52 ENTRY(outsl)
  53                 adr     r0, .iosl_warning
  54                 mov     r1, lr
  55                 b       printk
  56
  57 @ Purpose: write a memc register
  58 @ Proto  : void memc_write(int register, int value);
  59 @ Returns: nothing
  60
  61 ENTRY(memc_write)
  62                 cmp     r0, #7
  63                 RETINSTR(movgt,pc,lr)
  64                 mov     r0, r0, lsl #17
  65                 mov     r1, r1, lsl #15
  66                 mov     r1, r1, lsr #17
  67                 orr     r0, r0, r1, lsl #2
  68                 add     r0, r0, #0x03600000
  69                 strb    r0, [r0]
  70                 RETINSTR(mov,pc,lr)
  71