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
  13 #ifndef __STR
  14 #ifdef __ASSEMBLY__
  15 #define __STR(x) x
  16 #else
  17 #define __STR(x) #x
  18 #endif
  19 #endif /* __STR */
  20
  21 #ifdef CONFIG_SMP
  22 #define M32R_LOCK       __STR(lock)
  23 #define M32R_UNLOCK     __STR(unlock)
  24 #else
  25 #define M32R_LOCK       __STR(ld)
  26 #define M32R_UNLOCK     __STR(st)
  27 #endif
  28
  29 #ifdef __ASSEMBLY__
  30 #undef ENTRY
  31 #define ENTRY(name) ENTRY_M name
  32         .macro  ENTRY_M name
  33         .global \name
  34         ALIGN
  35 \name:
  36         .endm
  37 #endif
  38
  39
  40 /**
  41  * LDIMM - load immediate value
  42  * STI - enable interruption
  43  * CLI - disable interruption
  44  */
  45
  46 #ifdef __ASSEMBLY__
  47
  48 #define LDIMM(reg,x) LDIMM reg x
  49         .macro LDIMM reg x
  50         seth    \reg, #high(\x)
  51         or3     \reg, \reg, #low(\x)
  52         .endm
  53
  54 #if !(defined(CONFIG_CHIP_M32102) || defined(CONFIG_CHIP_M32104))
  55 #define STI(reg) STI_M reg
  56         .macro STI_M reg
  57         setpsw  #0x40       ->  nop
  58         ; WORKAROUND: "-> nop" is a workaround for the M32700(TS1).
  59         .endm
  60
  61 #define CLI(reg) CLI_M reg
  62         .macro CLI_M reg
  63         clrpsw  #0x40       ->  nop
  64         ; WORKAROUND: "-> nop" is a workaround for the M32700(TS1).
  65         .endm
  66 #else   /* CONFIG_CHIP_M32102 || CONFIG_CHIP_M32104 */
  67 #define STI(reg) STI_M reg
  68         .macro STI_M reg
  69         mvfc    \reg, psw
  70         or3     \reg, \reg, #0x0040
  71         mvtc    \reg, psw
  72         .endm
  73
  74 #define CLI(reg) CLI_M reg
  75         .macro CLI_M reg
  76         mvfc    \reg, psw
  77         and3    \reg, \reg, #0xffbf
  78         mvtc    \reg, psw
  79         .endm
  80 #endif  /* CONFIG_CHIP_M32102 */
  81
  82         .macro  SAVE_ALL
  83         push    r0              ; orig_r0
  84         push    sp              ; spi (r15)
  85         push    lr              ; r14
  86         push    r13
  87         mvfc    r13, cr3        ; spu
  88         push    r13
  89         mvfc    r13, bbpc
  90         push    r13
  91         mvfc    r13, bbpsw
  92         push    r13
  93         mvfc    r13, bpc
  94         push    r13
  95         mvfc    r13, psw
  96         push    r13
  97 #if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2)
  98         mvfaclo r13, a1
  99         push    r13
 100         mvfachi r13, a1
 101         push    r13
 102         mvfaclo r13, a0
 103         push    r13
 104         mvfachi r13, a0
 105         push    r13
 106 #elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R)
 107         mvfaclo r13
 108         push    r13
 109         mvfachi r13
 110         push    r13
 111         ldi     r13, #0
 112         push    r13             ; dummy push acc1h
 113         push    r13             ; dummy push acc1l
 114 #else
 115 #error unknown isa configuration
 116 #endif
 117         ldi     r13, #-1
 118         push    r13             ; syscall_nr (default: -1)
 119         push    r12
 120         push    r11
 121         push    r10
 122         push    r9
 123         push    r8
 124         push    r7
 125         push    r3
 126         push    r2
 127         push    r1
 128         push    r0
 129         addi    sp, #-4         ; room for implicit pt_regs parameter
 130         push    r6
 131         push    r5
 132         push    r4
 133         .endm
 134
 135         .macro  RESTORE_ALL
 136         pop     r4
 137         pop     r5
 138         pop     r6
 139         addi    sp, #4
 140         pop     r0
 141         pop     r1
 142         pop     r2
 143         pop     r3
 144         pop     r7
 145         pop     r8
 146         pop     r9
 147         pop     r10
 148         pop     r11
 149         pop     r12
 150         addi    r15, #4         ; Skip syscall number
 151 #if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2)
 152         pop     r13
 153         mvtachi r13, a0
 154         pop     r13
 155         mvtaclo r13, a0
 156         pop     r13
 157         mvtachi r13, a1
 158         pop     r13
 159         mvtaclo r13, a1
 160 #elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R)
 161         pop     r13             ; dummy pop acc1h
 162         pop     r13             ; dummy pop acc1l
 163         pop     r13
 164         mvtachi r13
 165         pop     r13
 166         mvtaclo r13
 167 #else
 168 #error unknown isa configuration
 169 #endif
 170         pop     r14
 171         mvtc    r14, psw
 172         pop     r14
 173         mvtc    r14, bpc
 174         addi    sp, #8          ; Skip bbpsw, bbpc
 175         pop     r14
 176         mvtc    r14, cr3        ; spu
 177         pop     r13
 178         pop     lr              ; r14
 179         pop     sp              ; spi (r15)
 180         addi    sp, #4          ; Skip orig_r0
 181         .fillinsn
 182 1:      rte
 183         .section .fixup,"ax"
 184 2:      bl      do_exit
 185         .previous
 186         .section __ex_table,"a"
 187         ALIGN
 188         .long   1b, 2b
 189         .previous
 190         .endm
 191
 192 #define GET_CURRENT(reg)  get_current reg
 193         .macro get_current reg
 194         ldi  \reg, #-8192
 195         and  \reg, sp
 196         .endm
 197
 198 #if !(defined(CONFIG_CHIP_M32102) || defined(CONFIG_CHIP_M32104))
 199         .macro  SWITCH_TO_KERNEL_STACK
 200         ; switch to kernel stack (spi)
 201         clrpsw  #0x80       ->  nop
 202         .endm
 203 #else   /* CONFIG_CHIP_M32102 || CONFIG_CHIP_M32104 */
 204         .macro  SWITCH_TO_KERNEL_STACK
 205         push    r0              ; save r0 for working
 206         mvfc    r0, psw
 207         and3    r0, r0, #0x00ff7f
 208         mvtc    r0, psw
 209         slli    r0, #16
 210         bltz    r0, 1f          ; check BSM-bit
 211 ;
 212         ;; called from kernel context: previous stack = spi
 213         pop     r0              ; retrieve r0
 214         bra     2f
 215         .fillinsn
 216 1:
 217         ;; called from user context: previous stack = spu
 218         mvfc    r0, cr3         ; spu
 219         addi    r0, #4
 220         mvtc    r0, cr3         ; spu
 221         ld      r0, @(-4,r0)    ; retrieve r0
 222         .fillinsn
 223 2:
 224         .endm
 225 #endif  /* CONFIG_CHIP_M32102 || CONFIG_CHIP_M32104 */
 226
 227 #endif  /* __ASSEMBLY__ */
 228
 229 #endif  /* _ASM_M32R_ASSEMBLER_H */