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 <linux/cfi_types.h>
  10 #include <linux/pgtable.h>
  11 #include <asm/assembler.h>
  12 #include <asm/asm-offsets.h>
  13 #include <asm/hwcap.h>
  14 #include <asm/pgtable-hwdef.h>
  15 #include <asm/ptrace.h>
  16
  17 #include "proc-macros.S"
  18
  19         .text
  20 /*
  21  * cpu_arm9tdmi_proc_init()
  22  * cpu_arm9tdmi_do_idle()
  23  * cpu_arm9tdmi_dcache_clean_area()
  24  * cpu_arm9tdmi_switch_mm()
  25  *
  26  * These are not required.
  27  */
  28 SYM_TYPED_FUNC_START(cpu_arm9tdmi_proc_init)
  29                 ret     lr
  30 SYM_FUNC_END(cpu_arm9tdmi_proc_init)
  31
  32 SYM_TYPED_FUNC_START(cpu_arm9tdmi_do_idle)
  33                 ret     lr
  34 SYM_FUNC_END(cpu_arm9tdmi_do_idle)
  35
  36 SYM_TYPED_FUNC_START(cpu_arm9tdmi_dcache_clean_area)
  37                 ret     lr
  38 SYM_FUNC_END(cpu_arm9tdmi_dcache_clean_area)
  39
  40 SYM_TYPED_FUNC_START(cpu_arm9tdmi_switch_mm)
  41                 ret     lr
  42 SYM_FUNC_END(cpu_arm9tdmi_switch_mm)
  43
  44 /*
  45  * cpu_arm9tdmi_proc_fin()
  46  */
  47 SYM_TYPED_FUNC_START(cpu_arm9tdmi_proc_fin)
  48                 ret     lr
  49 SYM_FUNC_END(cpu_arm9tdmi_proc_fin)
  50
  51 /*
  52  * Function: cpu_arm9tdmi_reset(loc)
  53  * Params  : loc(r0)    address to jump to
  54  * Purpose : Sets up everything for a reset and jump to the location for soft reset.
  55  */
  56                 .pushsection    .idmap.text, "ax"
  57 SYM_TYPED_FUNC_START(cpu_arm9tdmi_reset)
  58                 ret     r0
  59 SYM_FUNC_END(cpu_arm9tdmi_reset)
  60                 .popsection
  61
  62                 .type   __arm9tdmi_setup, #function
  63 __arm9tdmi_setup:
  64                 ret     lr
  65                 .size   __arm9tdmi_setup, . - __arm9tdmi_setup
  66
  67                 __INITDATA
  68
  69                 @ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
  70                 define_processor_functions arm9tdmi, dabort=nommu_early_abort, pabort=legacy_pabort, nommu=1
  71
  72                 .section ".rodata"
  73
  74                 string  cpu_arch_name, "armv4t"
  75                 string  cpu_elf_name, "v4"
  76                 string  cpu_arm9tdmi_name, "ARM9TDMI"
  77                 string  cpu_p2001_name, "P2001"
  78
  79                 .align
  80
  81                 .section ".proc.info.init", "a"
  82
  83 .macro arm9tdmi_proc_info name:req, cpu_val:req, cpu_mask:req, cpu_name:req
  84                 .type   __\name\()_proc_info, #object
  85 __\name\()_proc_info:
  86                 .long   \cpu_val
  87                 .long   \cpu_mask
  88                 .long   0
  89                 .long   0
  90                 initfn  __arm9tdmi_setup, __\name\()_proc_info
  91                 .long   cpu_arch_name
  92                 .long   cpu_elf_name
  93                 .long   HWCAP_SWP | HWCAP_THUMB | HWCAP_26BIT
  94                 .long   \cpu_name
  95                 .long   arm9tdmi_processor_functions
  96                 .long   0
  97                 .long   0
  98                 .long   v4_cache_fns
  99                 .size   __\name\()_proc_info, . - __\name\()_proc_info
 100 .endm
 101
 102         arm9tdmi_proc_info arm9tdmi, 0x41009900, 0xfff8ff00, cpu_arm9tdmi_name
 103         arm9tdmi_proc_info p2001, 0x41029000, 0xffffffff, cpu_p2001_name