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 <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_arm7tdmi_proc_init()
  22  * cpu_arm7tdmi_do_idle()
  23  * cpu_arm7tdmi_dcache_clean_area()
  24  * cpu_arm7tdmi_switch_mm()
  25  *
  26  * These are not required.
  27 */
  28 SYM_TYPED_FUNC_START(cpu_arm7tdmi_proc_init)
  29         ret lr
  30 SYM_FUNC_END(cpu_arm7tdmi_proc_init)
  31
  32 SYM_TYPED_FUNC_START(cpu_arm7tdmi_do_idle)
  33         ret lr
  34 SYM_FUNC_END(cpu_arm7tdmi_do_idle)
  35
  36 SYM_TYPED_FUNC_START(cpu_arm7tdmi_dcache_clean_area)
  37         ret lr
  38 SYM_FUNC_END(cpu_arm7tdmi_dcache_clean_area)
  39
  40 SYM_TYPED_FUNC_START(cpu_arm7tdmi_switch_mm)
  41         ret     lr
  42 SYM_FUNC_END(cpu_arm7tdmi_switch_mm)
  43
  44 /*
  45  * cpu_arm7tdmi_proc_fin()
  46 */
  47 SYM_TYPED_FUNC_START(cpu_arm7tdmi_proc_fin)
  48         ret     lr
  49 SYM_FUNC_END(cpu_arm7tdmi_proc_fin)
  50
  51 /*
  52  * Function: cpu_arm7tdmi_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_arm7tdmi_reset)
  58                 ret     r0
  59 SYM_FUNC_END(cpu_arm7tdmi_reset)
  60                 .popsection
  61
  62                 .type   __arm7tdmi_setup, #function
  63 __arm7tdmi_setup:
  64                 ret     lr
  65                 .size   __arm7tdmi_setup, . - __arm7tdmi_setup
  66
  67                 __INITDATA
  68
  69                 @ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
  70                 define_processor_functions arm7tdmi, dabort=v4t_late_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_arm7tdmi_name, "ARM7TDMI"
  77                 string  cpu_triscenda7_name, "Triscend-A7x"
  78                 string  cpu_at91_name, "Atmel-AT91M40xxx"
  79                 string  cpu_s3c3410_name, "Samsung-S3C3410"
  80                 string  cpu_s3c44b0x_name, "Samsung-S3C44B0x"
  81                 string  cpu_s3c4510b_name, "Samsung-S3C4510B"
  82                 string  cpu_s3c4530_name, "Samsung-S3C4530"
  83                 string  cpu_netarm_name, "NETARM"
  84
  85                 .align
  86
  87                 .section ".proc.info.init", "a"
  88
  89 .macro arm7tdmi_proc_info name:req, cpu_val:req, cpu_mask:req, cpu_name:req, \
  90         extra_hwcaps=0
  91                 .type   __\name\()_proc_info, #object
  92 __\name\()_proc_info:
  93                 .long   \cpu_val
  94                 .long   \cpu_mask
  95                 .long   0
  96                 .long   0
  97                 initfn  __arm7tdmi_setup, __\name\()_proc_info
  98                 .long   cpu_arch_name
  99                 .long   cpu_elf_name
 100                 .long   HWCAP_SWP | HWCAP_26BIT | ( \extra_hwcaps )
 101                 .long   \cpu_name
 102                 .long   arm7tdmi_processor_functions
 103                 .long   0
 104                 .long   0
 105                 .long   v4_cache_fns
 106                 .size   __\name\()_proc_info, . - __\name\()_proc_info
 107 .endm
 108
 109                 arm7tdmi_proc_info arm7tdmi, 0x41007700, 0xfff8ff00, \
 110                         cpu_arm7tdmi_name
 111                 arm7tdmi_proc_info triscenda7, 0x0001d2ff, 0x0001ffff, \
 112                         cpu_triscenda7_name, extra_hwcaps=HWCAP_THUMB
 113                 arm7tdmi_proc_info at91, 0x14000040, 0xfff000e0, \
 114                         cpu_at91_name, extra_hwcaps=HWCAP_THUMB
 115                 arm7tdmi_proc_info s3c4510b, 0x36365000, 0xfffff000, \
 116                         cpu_s3c4510b_name, extra_hwcaps=HWCAP_THUMB
 117                 arm7tdmi_proc_info s3c4530, 0x4c000000, 0xfff000e0, \
 118                         cpu_s3c4530_name, extra_hwcaps=HWCAP_THUMB
 119                 arm7tdmi_proc_info s3c3410, 0x34100000, 0xffff0000, \
 120                         cpu_s3c3410_name, extra_hwcaps=HWCAP_THUMB
 121                 arm7tdmi_proc_info s3c44b0x, 0x44b00000, 0xffff0000, \
 122                         cpu_s3c44b0x_name, extra_hwcaps=HWCAP_THUMB