root/arch/arm/mm/proc-arm9tdmi.S

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *  linux/arch/arm/mm/proc-arm9tdmi.S: utility functions for ARM9TDMI
   4  *
   5  *  Copyright (C) 2003-2006 Hyok S. Choi <hyok.choi@samsung.com>
   6  */
   7 #include <linux/linkage.h>
   8 #include <linux/init.h>
   9 #include <asm/assembler.h>
  10 #include <asm/asm-offsets.h>
  11 #include <asm/hwcap.h>
  12 #include <asm/pgtable-hwdef.h>
  13 #include <asm/pgtable.h>
  14 #include <asm/ptrace.h>
  15 
  16 #include "proc-macros.S"
  17 
  18         .text
  19 /*
  20  * cpu_arm9tdmi_proc_init()
  21  * cpu_arm9tdmi_do_idle()
  22  * cpu_arm9tdmi_dcache_clean_area()
  23  * cpu_arm9tdmi_switch_mm()
  24  *
  25  * These are not required.
  26  */
  27 ENTRY(cpu_arm9tdmi_proc_init)
  28 ENTRY(cpu_arm9tdmi_do_idle)
  29 ENTRY(cpu_arm9tdmi_dcache_clean_area)
  30 ENTRY(cpu_arm9tdmi_switch_mm)
  31                 ret     lr
  32 
  33 /*
  34  * cpu_arm9tdmi_proc_fin()
  35  */
  36 ENTRY(cpu_arm9tdmi_proc_fin)
  37                 ret     lr
  38 
  39 /*
  40  * Function: cpu_arm9tdmi_reset(loc)
  41  * Params  : loc(r0)    address to jump to
  42  * Purpose : Sets up everything for a reset and jump to the location for soft reset.
  43  */
  44                 .pushsection    .idmap.text, "ax"
  45 ENTRY(cpu_arm9tdmi_reset)
  46                 ret     r0
  47 ENDPROC(cpu_arm9tdmi_reset)
  48                 .popsection
  49 
  50                 .type   __arm9tdmi_setup, #function
  51 __arm9tdmi_setup:
  52                 ret     lr
  53                 .size   __arm9tdmi_setup, . - __arm9tdmi_setup
  54 
  55                 __INITDATA
  56 
  57                 @ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
  58                 define_processor_functions arm9tdmi, dabort=nommu_early_abort, pabort=legacy_pabort, nommu=1
  59 
  60                 .section ".rodata"
  61 
  62                 string  cpu_arch_name, "armv4t"
  63                 string  cpu_elf_name, "v4"
  64                 string  cpu_arm9tdmi_name, "ARM9TDMI"
  65                 string  cpu_p2001_name, "P2001"
  66 
  67                 .align
  68 
  69                 .section ".proc.info.init", #alloc
  70 
  71 .macro arm9tdmi_proc_info name:req, cpu_val:req, cpu_mask:req, cpu_name:req
  72                 .type   __\name\()_proc_info, #object
  73 __\name\()_proc_info:
  74                 .long   \cpu_val
  75                 .long   \cpu_mask
  76                 .long   0
  77                 .long   0
  78                 initfn  __arm9tdmi_setup, __\name\()_proc_info
  79                 .long   cpu_arch_name
  80                 .long   cpu_elf_name
  81                 .long   HWCAP_SWP | HWCAP_THUMB | HWCAP_26BIT
  82                 .long   \cpu_name
  83                 .long   arm9tdmi_processor_functions
  84                 .long   0
  85                 .long   0
  86                 .long   v4_cache_fns
  87                 .size   __\name\()_proc_info, . - __\name\()_proc_info
  88 .endm
  89 
  90         arm9tdmi_proc_info arm9tdmi, 0x41009900, 0xfff8ff00, cpu_arm9tdmi_name
  91         arm9tdmi_proc_info p2001, 0x41029000, 0xffffffff, cpu_p2001_name