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/* SPDX-License-Identifier: GPL-2.0 */
/*
 * winmacro.h: Window loading-unloading macros.
 *
 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 */

#ifndef _SPARC_WINMACRO_H
#define _SPARC_WINMACRO_H

#include <asm/ptrace.h>

/* Store the register window onto the 8-byte aligned area starting
 * at %reg.  It might be %sp, it might not, we don't care.
 */
#define STORE_WINDOW(reg) \
	std	%l0, [%reg + RW_L0]; \
	std	%l2, [%reg + RW_L2]; \
	std	%l4, [%reg + RW_L4]; \
	std	%l6, [%reg + RW_L6]; \
	std	%i0, [%reg + RW_I0]; \
	std	%i2, [%reg + RW_I2]; \
	std	%i4, [%reg + RW_I4]; \
	std	%i6, [%reg + RW_I6];

/* Load a register window from the area beginning at %reg. */
#define LOAD_WINDOW(reg) \
	ldd	[%reg + RW_L0], %l0; \
	ldd	[%reg + RW_L2], %l2; \
	ldd	[%reg + RW_L4], %l4; \
	ldd	[%reg + RW_L6], %l6; \
	ldd	[%reg + RW_I0], %i0; \
	ldd	[%reg + RW_I2], %i2; \
	ldd	[%reg + RW_I4], %i4; \
	ldd	[%reg + RW_I6], %i6;

/* Loading and storing struct pt_reg trap frames. */
#define LOAD_PT_INS(base_reg) \
        ldd     [%base_reg + STACKFRAME_SZ + PT_I0], %i0; \
        ldd     [%base_reg + STACKFRAME_SZ + PT_I2], %i2; \
        ldd     [%base_reg + STACKFRAME_SZ + PT_I4], %i4; \
        ldd     [%base_reg + STACKFRAME_SZ + PT_I6], %i6;

#define LOAD_PT_GLOBALS(base_reg) \
        ld      [%base_reg + STACKFRAME_SZ + PT_G1], %g1; \
        ldd     [%base_reg + STACKFRAME_SZ + PT_G2], %g2; \
        ldd     [%base_reg + STACKFRAME_SZ + PT_G4], %g4; \
        ldd     [%base_reg + STACKFRAME_SZ + PT_G6], %g6;

#define LOAD_PT_YREG(base_reg, scratch) \
        ld      [%base_reg + STACKFRAME_SZ + PT_Y], %scratch; \
        wr      %scratch, 0x0, %y;

#define LOAD_PT_PRIV(base_reg, pt_psr, pt_pc, pt_npc) \
        ld      [%base_reg + STACKFRAME_SZ + PT_PSR], %pt_psr; \
        ld      [%base_reg + STACKFRAME_SZ + PT_PC], %pt_pc; \
        ld      [%base_reg + STACKFRAME_SZ + PT_NPC], %pt_npc;

#define LOAD_PT_ALL(base_reg, pt_psr, pt_pc, pt_npc, scratch) \
        LOAD_PT_YREG(base_reg, scratch) \
        LOAD_PT_INS(base_reg) \
        LOAD_PT_GLOBALS(base_reg) \
        LOAD_PT_PRIV(base_reg, pt_psr, pt_pc, pt_npc)

#define STORE_PT_INS(base_reg) \
        std     %i0, [%base_reg + STACKFRAME_SZ + PT_I0]; \
        std     %i2, [%base_reg + STACKFRAME_SZ + PT_I2]; \
        std     %i4, [%base_reg + STACKFRAME_SZ + PT_I4]; \
        std     %i6, [%base_reg + STACKFRAME_SZ + PT_I6];

#define STORE_PT_GLOBALS(base_reg) \
        st      %g1, [%base_reg + STACKFRAME_SZ + PT_G1]; \
        std     %g2, [%base_reg + STACKFRAME_SZ + PT_G2]; \
        std     %g4, [%base_reg + STACKFRAME_SZ + PT_G4]; \
        std     %g6, [%base_reg + STACKFRAME_SZ + PT_G6];

#define STORE_PT_YREG(base_reg, scratch) \
        rd      %y, %scratch; \
        st      %scratch, [%base_reg + STACKFRAME_SZ + PT_Y];

#define STORE_PT_PRIV(base_reg, pt_psr, pt_pc, pt_npc) \
        st      %pt_psr, [%base_reg + STACKFRAME_SZ + PT_PSR]; \
        st      %pt_pc,  [%base_reg + STACKFRAME_SZ + PT_PC]; \
        st      %pt_npc, [%base_reg + STACKFRAME_SZ + PT_NPC];

#define STORE_PT_ALL(base_reg, reg_psr, reg_pc, reg_npc, g_scratch) \
        STORE_PT_PRIV(base_reg, reg_psr, reg_pc, reg_npc) \
        STORE_PT_GLOBALS(base_reg) \
        STORE_PT_YREG(base_reg, g_scratch) \
        STORE_PT_INS(base_reg)

#define SAVE_BOLIXED_USER_STACK(cur_reg, scratch) \
        ld       [%cur_reg + TI_W_SAVED], %scratch; \
        sll      %scratch, 2, %scratch; \
        add      %scratch, %cur_reg, %scratch; \
        st       %sp, [%scratch + TI_RWIN_SPTRS]; \
        sub      %scratch, %cur_reg, %scratch; \
        sll      %scratch, 4, %scratch; \
        add      %scratch, %cur_reg, %scratch; \
        STORE_WINDOW(scratch + TI_REG_WINDOW); \
        sub      %scratch, %cur_reg, %scratch; \
        srl      %scratch, 6, %scratch; \
        add      %scratch, 1, %scratch; \
        st       %scratch, [%cur_reg + TI_W_SAVED];

#ifdef CONFIG_SMP
#define LOAD_CURRENT(dest_reg, idreg) 			\
661:	rd	%tbr, %idreg;				\
	srl	%idreg, 10, %idreg;			\
	and	%idreg, 0xc, %idreg;			\
	.section	.cpuid_patch, "ax";		\
	/* Instruction location. */			\
	.word		661b;				\
	/* SUN4D implementation. */			\
	lda	 [%g0] ASI_M_VIKING_TMP1, %idreg;	\
	sll	 %idreg, 2, %idreg;			\
	nop;						\
	/* LEON implementation. */			\
	rd 	%asr17, %idreg;				\
	srl	%idreg, 0x1c, %idreg;			\
	sll	%idreg, 0x02, %idreg;			\
	.previous;					\
	sethi    %hi(current_set), %dest_reg; 		\
	or       %dest_reg, %lo(current_set), %dest_reg;\
	ld       [%idreg + %dest_reg], %dest_reg;
#else
#define LOAD_CURRENT(dest_reg, idreg) \
        sethi    %hi(current_set), %idreg; \
        ld       [%idreg + %lo(current_set)], %dest_reg;
#endif

#endif /* !(_SPARC_WINMACRO_H) */

Filemanager

Name Type Size Permission Actions
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agp.h File 434 B 0644
apb.h File 1.06 KB 0644
asm-offsets.h File 35 B 0644
asm-prototypes.h File 727 B 0644
asm.h File 1.08 KB 0644
asmmacro.h File 1.16 KB 0644
atomic.h File 219 B 0644
atomic_32.h File 2.26 KB 0644
atomic_64.h File 3.34 KB 0644
auxio.h File 310 B 0644
auxio_32.h File 2.55 KB 0644
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winmacro.h File 4.66 KB 0644
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