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   1 /*
   2  *  linux/arch/arm/mm/proc-arm9tdmi.S: utility functions for ARM9TDMI
   3  *
   4  *  Copyright (C) 2003-2006 Hyok S. Choi <hyok.choi@samsung.com>
   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  */
  11 #include <linux/linkage.h>
  12 #include <linux/init.h>
  13 #include <asm/assembler.h>
  14 #include <asm/asm-offsets.h>
  15 #include <asm/elf.h>
  16 #include <asm/pgtable-hwdef.h>
  17 #include <asm/pgtable.h>
  18 #include <asm/ptrace.h>
  19
  20         .text
  21 /*
  22  * cpu_arm9tdmi_proc_init()
  23  * cpu_arm9tdmi_do_idle()
  24  * cpu_arm9tdmi_dcache_clean_area()
  25  * cpu_arm9tdmi_switch_mm()
  26  *
  27  * These are not required.
  28  */
  29 ENTRY(cpu_arm9tdmi_proc_init)
  30 ENTRY(cpu_arm9tdmi_do_idle)
  31 ENTRY(cpu_arm9tdmi_dcache_clean_area)
  32 ENTRY(cpu_arm9tdmi_switch_mm)
  33                 mov     pc, lr
  34
  35 /*
  36  * cpu_arm9tdmi_proc_fin()
  37  */
  38 ENTRY(cpu_arm9tdmi_proc_fin)
  39                 mov     r0, #PSR_F_BIT | PSR_I_BIT | SVC_MODE
  40                 msr     cpsr_c, r0
  41                 mov     pc, lr
  42
  43 /*
  44  * Function: cpu_arm9tdmi_reset(loc)
  45  * Params  : loc(r0)    address to jump to
  46  * Purpose : Sets up everything for a reset and jump to the location for soft reset.
  47  */
  48 ENTRY(cpu_arm9tdmi_reset)
  49                 mov     pc, r0
  50
  51                 __INIT
  52
  53                 .type   __arm9tdmi_setup, #function
  54 __arm9tdmi_setup:
  55                 mov     pc, lr
  56                 .size   __arm9tdmi_setup, . - __arm9tdmi_setup
  57
  58                 __INITDATA
  59
  60 /*
  61  * Purpose : Function pointers used to access above functions - all calls
  62  *           come through these
  63  */
  64                 .type   arm9tdmi_processor_functions, #object
  65 ENTRY(arm9tdmi_processor_functions)
  66                 .word   nommu_early_abort
  67                 .word   pabort_noifar
  68                 .word   cpu_arm9tdmi_proc_init
  69                 .word   cpu_arm9tdmi_proc_fin
  70                 .word   cpu_arm9tdmi_reset
  71                 .word   cpu_arm9tdmi_do_idle
  72                 .word   cpu_arm9tdmi_dcache_clean_area
  73                 .word   cpu_arm9tdmi_switch_mm
  74                 .word   0               @ cpu_*_set_pte
  75                 .size   arm9tdmi_processor_functions, . - arm9tdmi_processor_functions
  76
  77                 .section ".rodata"
  78
  79                 .type   cpu_arch_name, #object
  80 cpu_arch_name:
  81                 .asciz  "armv4t"
  82                 .size   cpu_arch_name, . - cpu_arch_name
  83
  84                 .type   cpu_elf_name, #object
  85 cpu_elf_name:
  86                 .asciz  "v4"
  87                 .size   cpu_elf_name, . - cpu_elf_name
  88
  89                 .type   cpu_arm9tdmi_name, #object
  90 cpu_arm9tdmi_name:
  91                 .asciz  "ARM9TDMI"
  92                 .size   cpu_arm9tdmi_name, . - cpu_arm9tdmi_name
  93
  94                 .type   cpu_p2001_name, #object
  95 cpu_p2001_name:
  96                 .asciz  "P2001"
  97                 .size   cpu_p2001_name, . - cpu_p2001_name
  98
  99                 .align
 100
 101                 .section ".proc.info.init", #alloc, #execinstr
 102
 103                 .type   __arm9tdmi_proc_info, #object
 104 __arm9tdmi_proc_info:
 105                 .long   0x41009900
 106                 .long   0xfff8ff00
 107                 .long   0
 108                 .long   0
 109                 b       __arm9tdmi_setup
 110                 .long   cpu_arch_name
 111                 .long   cpu_elf_name
 112                 .long   HWCAP_SWP | HWCAP_THUMB | HWCAP_26BIT
 113                 .long   cpu_arm9tdmi_name
 114                 .long   arm9tdmi_processor_functions
 115                 .long   0
 116                 .long   0
 117                 .long   v4_cache_fns
 118                 .size   __arm9tdmi_proc_info, . - __arm9dmi_proc_info
 119
 120                 .type   __p2001_proc_info, #object
 121 __p2001_proc_info:
 122                 .long   0x41029000
 123                 .long   0xffffffff
 124                 .long   0
 125                 .long   0
 126                 b       __arm9tdmi_setup
 127                 .long   cpu_arch_name
 128                 .long   cpu_elf_name
 129                 .long   HWCAP_SWP | HWCAP_THUMB | HWCAP_26BIT
 130                 .long   cpu_p2001_name
 131                 .long   arm9tdmi_processor_functions
 132                 .long   0
 133                 .long   0
 134                 .long   v4_cache_fns
 135                 .size   __p2001_proc_info, . - __p2001_proc_info