arch/arm/lib/ecard.S

   1 /*
   2  *  linux/arch/arm/lib/ecard.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  * 27/03/03 Ian Molton Clean up CONFIG_CPU
  11  *
  12  */
  13 #include <linux/linkage.h>
  14 #include <asm/assembler.h>
  15 #include <mach/hardware.h>
  16
  17 #define CPSR2SPSR(rt) \
  18                 mrs     rt, cpsr; \
  19                 msr     spsr_cxsf, rt
  20
  21 @ Purpose: call an expansion card loader to read bytes.
  22 @ Proto  : char read_loader(int offset, char *card_base, char *loader);
  23 @ Returns: byte read
  24
  25 ENTRY(ecard_loader_read)
  26                 stmfd   sp!, {r4 - r12, lr}
  27                 mov     r11, r1
  28                 mov     r1, r0
  29                 CPSR2SPSR(r0)
  30                 mov     lr, pc
  31                 mov     pc, r2
  32                 ldmfd   sp!, {r4 - r12, pc}
  33
  34 @ Purpose: call an expansion card loader to reset the card
  35 @ Proto  : void read_loader(int card_base, char *loader);
  36 @ Returns: byte read
  37
  38 ENTRY(ecard_loader_reset)
  39                 stmfd   sp!, {r4 - r12, lr}
  40                 mov     r11, r0
  41                 CPSR2SPSR(r0)
  42                 mov     lr, pc
  43                 add     pc, r1, #8
  44                 ldmfd   sp!, {r4 - r12, pc}
  45