This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / asm-avr32 / asm.h

diff --git a/include/asm-avr32/asm.h b/include/asm-avr32/asm.h
new file mode 100644 (file)
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+++ b/include/asm-avr32/asm.h
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __ASM_AVR32_ASM_H__
+#define __ASM_AVR32_ASM_H__
+
+#include <asm/sysreg.h>
+#include <asm/asm-offsets.h>
+#include <asm/thread_info.h>
+
+#define mask_interrupts                ssrf    SR_GM_BIT
+#define mask_exceptions                ssrf    SR_EM_BIT
+#define unmask_interrupts      csrf    SR_GM_BIT
+#define unmask_exceptions      csrf    SR_EM_BIT
+
+#ifdef CONFIG_FRAME_POINTER
+       .macro  save_fp
+       st.w    --sp, r7
+       .endm
+       .macro  restore_fp
+       ld.w    r7, sp++
+       .endm
+       .macro  zero_fp
+       mov     r7, 0
+       .endm
+#else
+       .macro  save_fp
+       .endm
+       .macro  restore_fp
+       .endm
+       .macro  zero_fp
+       .endm
+#endif
+       .macro  get_thread_info reg
+       mov     \reg, sp
+       andl    \reg, ~(THREAD_SIZE - 1) & 0xffff
+       .endm
+
+       /* Save and restore registers */
+       .macro  save_min sr, tmp=lr
+       pushm   lr
+       mfsr    \tmp, \sr
+       zero_fp
+       st.w    --sp, \tmp
+       .endm
+
+       .macro  restore_min sr, tmp=lr
+       ld.w    \tmp, sp++
+       mtsr    \sr, \tmp
+       popm    lr
+       .endm
+
+       .macro  save_half sr, tmp=lr
+       save_fp
+       pushm   r8-r9,r10,r11,r12,lr
+       zero_fp
+       mfsr    \tmp, \sr
+       st.w    --sp, \tmp
+       .endm
+
+       .macro  restore_half sr, tmp=lr
+       ld.w    \tmp, sp++
+       mtsr    \sr, \tmp
+       popm    r8-r9,r10,r11,r12,lr
+       restore_fp
+       .endm
+
+       .macro  save_full_user sr, tmp=lr
+       stmts   --sp, r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,sp,lr
+       st.w    --sp, lr
+       zero_fp
+       mfsr    \tmp, \sr
+       st.w    --sp, \tmp
+       .endm
+
+       .macro  restore_full_user sr, tmp=lr
+       ld.w    \tmp, sp++
+       mtsr    \sr, \tmp
+       ld.w    lr, sp++
+       ldmts   sp++, r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,sp,lr
+       .endm
+
+       /* uaccess macros */
+       .macro branch_if_kernel scratch, label
+       get_thread_info \scratch
+       ld.w    \scratch, \scratch[TI_flags]
+       bld     \scratch, TIF_USERSPACE
+       brcc    \label
+       .endm
+
+       .macro ret_if_privileged scratch, addr, size, ret
+       sub     \scratch, \size, 1
+       add     \scratch, \addr
+       retcs   \ret
+       retmi   \ret
+       .endm
+
+#endif /* __ASM_AVR32_ASM_H__ */