/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Copyright (c) 2009, Intel Corporation
 * All rights reserved.
 */

/*
 * Portions Copyright 2009 Advanced Micro Devices, Inc.
 */

/*
 * Assembler support routines to getcpuid information used to set
 * cache size information. Cache information used by memset, strcpy, etc..
 */

#include <sys/asm_linkage.h>
#include "proc64_id.h"

        .global .memops_method
        .global .amd64cache1, .amd64cache1half, .amd64cache2, .amd64cache2half
        .global .largest_level_cache_size


/*
 * Defaults for Core 2 Duo and AMD's SledgeHammer
 */
        .data
        .balign  8
.memops_method:
        .int    NO_SSE

        .balign 8
.amd64cache1:   .quad   AMD_DFLT_L1_CACHE_SIZE
.amd64cache1half: .quad AMD_DFLT_L1_CACHE_SIZE/2
.amd64cache2:   .quad   AMD_DFLT_L2_CACHE_SIZE
.amd64cache2half: .quad AMD_DFLT_L2_CACHE_SIZE/2
.largest_level_cache_size:
                .int    AMD_DFLT_L2_CACHE_SIZE

/*
 * Get cpuid data.
 * (void)__libc_get_cpuid(int cpuid_function, void *out_reg, int cache_index )
 */
        .text

        ENTRY(__libc_get_cpuid)
        # rdi = cpuid function, rsi = out_reg addr, rdx = cache index(fn 4)
        push    %rbx
        mov     %edx,%ecx
        mov     %edi,%eax
        cpuid
        mov     %eax,(%rsi)
        mov     %ebx,0x4(%rsi)
        mov     %ecx,0x8(%rsi)
        mov     %edx,0xc(%rsi)
        pop     %rbx
        ret
        SET_SIZE(__libc_get_cpuid)

/*
 * Set memops SSE level to use.
 * void __intel_set_memops_method(long sse_level);
 */
        ENTRY(__intel_set_memops_method)
        mov     %edi,.memops_method(%rip)
        ret
        SET_SIZE(__intel_set_memops_method)

/*
 * Set cache info global variables used by various libc primitives.
 * __set_cache_sizes(long l1_cache_size, long l2_cache_size,
 *    long largest_level_cache);
 */
        ENTRY(__set_cache_sizes)
        # rdi = l1_cache_size, rsi = l2_cache_size, rdx = largest_level_cache

        mov     %rdi,.amd64cache1(%rip)
        shr     $1, %rdi
        mov     %rdi,.amd64cache1half(%rip)

        mov     %rsi,.amd64cache2(%rip)
        shr     $1, %rsi
        mov     %rsi,.amd64cache2half(%rip)

        mov     %rdx,.largest_level_cache_size(%rip)
        ret
        SET_SIZE(__set_cache_sizes)