root/arch/arm/mm/proc-arm7tdmi.S

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *  linux/arch/arm/mm/proc-arm7tdmi.S: utility functions for ARM7TDMI
   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_arm7tdmi_proc_init()
  21  * cpu_arm7tdmi_do_idle()
  22  * cpu_arm7tdmi_dcache_clean_area()
  23  * cpu_arm7tdmi_switch_mm()
  24  *
  25  * These are not required.
  26  */
  27 ENTRY(cpu_arm7tdmi_proc_init)
  28 ENTRY(cpu_arm7tdmi_do_idle)
  29 ENTRY(cpu_arm7tdmi_dcache_clean_area)
  30 ENTRY(cpu_arm7tdmi_switch_mm)
  31                 ret     lr
  32 
  33 /*
  34  * cpu_arm7tdmi_proc_fin()
  35  */
  36 ENTRY(cpu_arm7tdmi_proc_fin)
  37                 ret     lr
  38 
  39 /*
  40  * Function: cpu_arm7tdmi_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_arm7tdmi_reset)
  46                 ret     r0
  47 ENDPROC(cpu_arm7tdmi_reset)
  48                 .popsection
  49 
  50                 .type   __arm7tdmi_setup, #function
  51 __arm7tdmi_setup:
  52                 ret     lr
  53                 .size   __arm7tdmi_setup, . - __arm7tdmi_setup
  54 
  55                 __INITDATA
  56 
  57                 @ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
  58                 define_processor_functions arm7tdmi, dabort=v4t_late_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_arm7tdmi_name, "ARM7TDMI"
  65                 string  cpu_triscenda7_name, "Triscend-A7x"
  66                 string  cpu_at91_name, "Atmel-AT91M40xxx"
  67                 string  cpu_s3c3410_name, "Samsung-S3C3410"
  68                 string  cpu_s3c44b0x_name, "Samsung-S3C44B0x"
  69                 string  cpu_s3c4510b_name, "Samsung-S3C4510B"
  70                 string  cpu_s3c4530_name, "Samsung-S3C4530"
  71                 string  cpu_netarm_name, "NETARM"
  72 
  73                 .align
  74 
  75                 .section ".proc.info.init", #alloc
  76 
  77 .macro arm7tdmi_proc_info name:req, cpu_val:req, cpu_mask:req, cpu_name:req, \
  78         extra_hwcaps=0
  79                 .type   __\name\()_proc_info, #object
  80 __\name\()_proc_info:
  81                 .long   \cpu_val
  82                 .long   \cpu_mask
  83                 .long   0
  84                 .long   0
  85                 initfn  __arm7tdmi_setup, __\name\()_proc_info
  86                 .long   cpu_arch_name
  87                 .long   cpu_elf_name
  88                 .long   HWCAP_SWP | HWCAP_26BIT | ( \extra_hwcaps )
  89                 .long   \cpu_name
  90                 .long   arm7tdmi_processor_functions
  91                 .long   0
  92                 .long   0
  93                 .long   v4_cache_fns
  94                 .size   __\name\()_proc_info, . - __\name\()_proc_info
  95 .endm
  96 
  97                 arm7tdmi_proc_info arm7tdmi, 0x41007700, 0xfff8ff00, \
  98                         cpu_arm7tdmi_name
  99                 arm7tdmi_proc_info triscenda7, 0x0001d2ff, 0x0001ffff, \
 100                         cpu_triscenda7_name, extra_hwcaps=HWCAP_THUMB
 101                 arm7tdmi_proc_info at91, 0x14000040, 0xfff000e0, \
 102                         cpu_at91_name, extra_hwcaps=HWCAP_THUMB
 103                 arm7tdmi_proc_info s3c4510b, 0x36365000, 0xfffff000, \
 104                         cpu_s3c4510b_name, extra_hwcaps=HWCAP_THUMB
 105                 arm7tdmi_proc_info s3c4530, 0x4c000000, 0xfff000e0, \
 106                         cpu_s3c4530_name, extra_hwcaps=HWCAP_THUMB
 107                 arm7tdmi_proc_info s3c3410, 0x34100000, 0xffff0000, \
 108                         cpu_s3c3410_name, extra_hwcaps=HWCAP_THUMB
 109                 arm7tdmi_proc_info s3c44b0x, 0x44b00000, 0xffff0000, \
 110                         cpu_s3c44b0x_name, extra_hwcaps=HWCAP_THUMB