summaryrefslogtreecommitdiffstats
path: root/kernel/arch/m32r/include/asm/assembler.h
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/arch/m32r/include/asm/assembler.h')
-rw-r--r--kernel/arch/m32r/include/asm/assembler.h230
1 files changed, 230 insertions, 0 deletions
diff --git a/kernel/arch/m32r/include/asm/assembler.h b/kernel/arch/m32r/include/asm/assembler.h
new file mode 100644
index 000000000..728799fc7
--- /dev/null
+++ b/kernel/arch/m32r/include/asm/assembler.h
@@ -0,0 +1,230 @@
+#ifndef _ASM_M32R_ASSEMBLER_H
+#define _ASM_M32R_ASSEMBLER_H
+
+/*
+ * linux/asm-m32r/assembler.h
+ *
+ * Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org>
+ *
+ * This file contains M32R architecture specific macro definitions.
+ */
+
+#include <linux/stringify.h>
+
+#undef __STR
+
+#ifdef __ASSEMBLY__
+#define __STR(x) x
+#else
+#define __STR(x) __stringify(x)
+#endif
+
+#ifdef CONFIG_SMP
+#define M32R_LOCK __STR(lock)
+#define M32R_UNLOCK __STR(unlock)
+#else
+#define M32R_LOCK __STR(ld)
+#define M32R_UNLOCK __STR(st)
+#endif
+
+#ifdef __ASSEMBLY__
+#undef ENTRY
+#define ENTRY(name) ENTRY_M name
+ .macro ENTRY_M name
+ .global \name
+ ALIGN
+\name:
+ .endm
+#endif
+
+
+/**
+ * LDIMM - load immediate value
+ * STI - enable interruption
+ * CLI - disable interruption
+ */
+
+#ifdef __ASSEMBLY__
+
+#define LDIMM(reg,x) LDIMM reg x
+ .macro LDIMM reg x
+ seth \reg, #high(\x)
+ or3 \reg, \reg, #low(\x)
+ .endm
+
+#if !(defined(CONFIG_CHIP_M32102) || defined(CONFIG_CHIP_M32104))
+#define ENABLE_INTERRUPTS(reg) ENABLE_INTERRUPTS reg
+ .macro ENABLE_INTERRUPTS reg
+ setpsw #0x40 -> nop
+ ; WORKAROUND: "-> nop" is a workaround for the M32700(TS1).
+ .endm
+
+#define DISABLE_INTERRUPTS(reg) DISABLE_INTERRUPTS reg
+ .macro DISABLE_INTERRUPTS reg
+ clrpsw #0x40 -> nop
+ ; WORKAROUND: "-> nop" is a workaround for the M32700(TS1).
+ .endm
+#else /* CONFIG_CHIP_M32102 || CONFIG_CHIP_M32104 */
+#define ENABLE_INTERRUPTS(reg) ENABLE_INTERRUPTS reg
+ .macro ENABLE_INTERRUPTS reg
+ mvfc \reg, psw
+ or3 \reg, \reg, #0x0040
+ mvtc \reg, psw
+ .endm
+
+#define DISABLE_INTERRUPTS(reg) DISABLE_INTERRUPTS reg
+ .macro DISABLE_INTERRUPTS reg
+ mvfc \reg, psw
+ and3 \reg, \reg, #0xffbf
+ mvtc \reg, psw
+ .endm
+#endif /* CONFIG_CHIP_M32102 */
+
+ .macro SAVE_ALL
+ push r0 ; orig_r0
+ push sp ; spi (r15)
+ push lr ; r14
+ push r13
+ mvfc r13, cr3 ; spu
+ push r13
+ mvfc r13, bbpc
+ push r13
+ mvfc r13, bbpsw
+ push r13
+ mvfc r13, bpc
+ push r13
+ mvfc r13, psw
+ push r13
+#if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2)
+ mvfaclo r13, a1
+ push r13
+ mvfachi r13, a1
+ push r13
+ mvfaclo r13, a0
+ push r13
+ mvfachi r13, a0
+ push r13
+#elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R)
+ mvfaclo r13
+ push r13
+ mvfachi r13
+ push r13
+ ldi r13, #0
+ push r13 ; dummy push acc1h
+ push r13 ; dummy push acc1l
+#else
+#error unknown isa configuration
+#endif
+ ldi r13, #-1
+ push r13 ; syscall_nr (default: -1)
+ push r12
+ push r11
+ push r10
+ push r9
+ push r8
+ push r7
+ push r3
+ push r2
+ push r1
+ push r0
+ addi sp, #-4 ; room for implicit pt_regs parameter
+ push r6
+ push r5
+ push r4
+ .endm
+
+ .macro RESTORE_ALL
+ pop r4
+ pop r5
+ pop r6
+ addi sp, #4
+ pop r0
+ pop r1
+ pop r2
+ pop r3
+ pop r7
+ pop r8
+ pop r9
+ pop r10
+ pop r11
+ pop r12
+ addi r15, #4 ; Skip syscall number
+#if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2)
+ pop r13
+ mvtachi r13, a0
+ pop r13
+ mvtaclo r13, a0
+ pop r13
+ mvtachi r13, a1
+ pop r13
+ mvtaclo r13, a1
+#elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R)
+ pop r13 ; dummy pop acc1h
+ pop r13 ; dummy pop acc1l
+ pop r13
+ mvtachi r13
+ pop r13
+ mvtaclo r13
+#else
+#error unknown isa configuration
+#endif
+ pop r14
+ mvtc r14, psw
+ pop r14
+ mvtc r14, bpc
+ addi sp, #8 ; Skip bbpsw, bbpc
+ pop r14
+ mvtc r14, cr3 ; spu
+ pop r13
+ pop lr ; r14
+ pop sp ; spi (r15)
+ addi sp, #4 ; Skip orig_r0
+ .fillinsn
+1: rte
+ .section .fixup,"ax"
+2: bl do_exit
+ .previous
+ .section __ex_table,"a"
+ ALIGN
+ .long 1b, 2b
+ .previous
+ .endm
+
+#define GET_CURRENT(reg) get_current reg
+ .macro get_current reg
+ ldi \reg, #-8192
+ and \reg, sp
+ .endm
+
+#if !(defined(CONFIG_CHIP_M32102) || defined(CONFIG_CHIP_M32104))
+ .macro SWITCH_TO_KERNEL_STACK
+ ; switch to kernel stack (spi)
+ clrpsw #0x80 -> nop
+ .endm
+#else /* CONFIG_CHIP_M32102 || CONFIG_CHIP_M32104 */
+ .macro SWITCH_TO_KERNEL_STACK
+ push r0 ; save r0 for working
+ mvfc r0, psw
+ and3 r0, r0, #0x00ff7f
+ mvtc r0, psw
+ slli r0, #16
+ bltz r0, 1f ; check BSM-bit
+;
+ ;; called from kernel context: previous stack = spi
+ pop r0 ; retrieve r0
+ bra 2f
+ .fillinsn
+1:
+ ;; called from user context: previous stack = spu
+ mvfc r0, cr3 ; spu
+ addi r0, #4
+ mvtc r0, cr3 ; spu
+ ld r0, @(-4,r0) ; retrieve r0
+ .fillinsn
+2:
+ .endm
+#endif /* CONFIG_CHIP_M32102 || CONFIG_CHIP_M32104 */
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_M32R_ASSEMBLER_H */