include/asm-m32r/assembler.h

   1 #ifndef _ASM_M32R_ASSEMBLER_H
   2 #define _ASM_M32R_ASSEMBLER_H
   3
   4 /*
   5  * linux/asm-m32r/assembler.h
   6  *
   7  * Copyright (C) 2004  Hirokazu Takata <takata at linux-m32r.org>
   8  *
   9  * This file contains M32R architecture specific macro definitions.
  10  */
  11
  12 #include <linux/config.h>
  13
  14 #ifndef __STR
  15 #ifdef __ASSEMBLY__
  16 #define __STR(x) x
  17 #else
  18 #define __STR(x) #x
  19 #endif
  20 #endif /* __STR */
  21
  22 #ifdef CONFIG_SMP
  23 #define M32R_LOCK       __STR(lock)
  24 #define M32R_UNLOCK     __STR(unlock)
  25 #else
  26 #define M32R_LOCK       __STR(ld)
  27 #define M32R_UNLOCK     __STR(st)
  28 #endif
  29
  30 #ifdef __ASSEMBLY__
  31 #undef ENTRY
  32 #define ENTRY(name) ENTRY_M name
  33         .macro  ENTRY_M name
  34         .global \name
  35         ALIGN
  36 \name:
  37         .endm
  38 #endif
  39
  40
  41 /**
  42  * LDIMM - load immediate value
  43  * STI - enable interruption
  44  * CLI - disable interruption
  45  */
  46
  47 #ifdef __ASSEMBLY__
  48
  49 #define LDIMM(reg,x) LDIMM reg x
  50         .macro LDIMM reg x
  51         seth    \reg, #high(\x)
  52         or3     \reg, \reg, #low(\x)
  53         .endm
  54
  55 #if !defined(CONFIG_CHIP_M32102)
  56 #define STI(reg) STI_M reg
  57         .macro STI_M reg
  58         setpsw  #0x40       ->  nop
  59         ; WORKAROUND: "-> nop" is a workaround for the M32700(TS1).
  60         .endm
  61
  62 #define CLI(reg) CLI_M reg
  63         .macro CLI_M reg
  64         clrpsw  #0x40       ->  nop
  65         ; WORKAROUND: "-> nop" is a workaround for the M32700(TS1).
  66         .endm
  67 #else   /* CONFIG_CHIP_M32102 */
  68 #define STI(reg) STI_M reg
  69         .macro STI_M reg
  70         mvfc    \reg, psw
  71         or3     \reg, \reg, #0x0040
  72         mvtc    \reg, psw
  73         .endm
  74
  75 #define CLI(reg) CLI_M reg
  76         .macro CLI_M reg
  77         mvfc    \reg, psw
  78         and3    \reg, \reg, #0xffbf
  79         mvtc    \reg, psw
  80         .endm
  81 #endif  /* CONFIG_CHIP_M32102 */
  82
  83         .macro  SAVE_ALL
  84         push    r0              ; orig_r0
  85         push    sp              ; spi (r15)
  86         push    lr              ; r14
  87         push    r13
  88         mvfc    r13, cr3        ; spu
  89         push    r13
  90         mvfc    r13, bbpc
  91         push    r13
  92         mvfc    r13, bbpsw
  93         push    r13
  94         mvfc    r13, bpc
  95         push    r13
  96         mvfc    r13, psw
  97         push    r13
  98 #if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2)
  99         mvfaclo r13, a1
 100         push    r13
 101         mvfachi r13, a1
 102         push    r13
 103         mvfaclo r13, a0
 104         push    r13
 105         mvfachi r13, a0
 106         push    r13
 107 #elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R)
 108         mvfaclo r13
 109         push    r13
 110         mvfachi r13
 111         push    r13
 112 #else
 113 #error unknown isa configuration
 114 #endif
 115         ldi     r13, #-1
 116         push    r13             ; syscall_nr (default: -1)
 117         push    r12
 118         push    r11
 119         push    r10
 120         push    r9
 121         push    r8
 122         push    r7
 123         push    r3
 124         push    r2
 125         push    r1
 126         push    r0
 127         addi    sp, #-4         ; room for implicit pt_regs parameter
 128         push    r6
 129         push    r5
 130         push    r4
 131         .endm
 132
 133         .macro  RESTORE_ALL
 134         pop     r4
 135         pop     r5
 136         pop     r6
 137         addi    sp, #4
 138         pop     r0
 139         pop     r1
 140         pop     r2
 141         pop     r3
 142         pop     r7
 143         pop     r8
 144         pop     r9
 145         pop     r10
 146         pop     r11
 147         pop     r12
 148         addi    r15, #4         ; Skip syscall number
 149 #if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2)
 150         pop     r13
 151         mvtachi r13, a0
 152         pop     r13
 153         mvtaclo r13, a0
 154         pop     r13
 155         mvtachi r13, a1
 156         pop     r13
 157         mvtaclo r13, a1
 158 #elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R)
 159         pop     r13
 160         mvtachi r13
 161         pop     r13
 162         mvtaclo r13
 163 #else
 164 #error unknown isa configuration
 165 #endif
 166         pop     r14
 167         mvtc    r14, psw
 168         pop     r14
 169         mvtc    r14, bpc
 170         addi    sp, #8          ; Skip bbpsw, bbpc
 171         pop     r14
 172         mvtc    r14, cr3        ; spu
 173         pop     r13
 174         pop     lr              ; r14
 175         pop     sp              ; spi (r15)
 176         addi    sp, #4          ; Skip orig_r0
 177         .fillinsn
 178 1:      rte
 179         .section .fixup,"ax"
 180 2:      bl      do_exit
 181         .previous
 182         .section __ex_table,"a"
 183         ALIGN
 184         .long   1b, 2b
 185         .previous
 186         .endm
 187
 188 #define GET_CURRENT(reg)  get_current reg
 189         .macro get_current reg
 190         ldi  \reg, #-8192
 191         and  \reg, sp
 192         .endm
 193
 194 #if !defined(CONFIG_CHIP_M32102)
 195         .macro  SWITCH_TO_KERNEL_STACK
 196         ; switch to kernel stack (spi)
 197         clrpsw  #0x80       ->  nop
 198         .endm
 199 #else   /* CONFIG_CHIP_M32102 */
 200         .macro  SWITCH_TO_KERNEL_STACK
 201         push    r0              ; save r0 for working
 202         mvfc    r0, psw
 203         and3    r0, r0, #0x00ff7f
 204         mvtc    r0, psw
 205         slli    r0, #16
 206         bltz    r0, 1f          ; check BSM-bit
 207 ;
 208         ;; called from kernel context: previous stack = spi
 209         pop     r0              ; retrieve r0
 210         bra     2f
 211         .fillinsn
 212 1:
 213         ;; called from user context: previous stack = spu
 214         mvfc    r0, cr3         ; spu
 215         addi    r0, #4
 216         mvtc    r0, cr3         ; spu
 217         ld      r0, @(-4,r0)    ; retrieve r0
 218         .fillinsn
 219 2:
 220         .endm
 221 #endif  /* CONFIG_CHIP_M32102 */
 222
 223 #endif  /* __ASSEMBLY__ */
 224
 225 #endif  /* _ASM_M32R_ASSEMBLER_H */