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/*
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/*
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 * Copyright (c) 2005 Jakub Jermar
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 * Copyright (c) 2005 Jakub Jermar
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 * All rights reserved.
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 * All rights reserved.
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 *
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * are met:
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 *
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 *
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 * - Redistributions of source code must retain the above copyright
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *   derived from this software without specific prior written permission.
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 *
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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 */
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/** @addtogroup sparc64
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/** @addtogroup sparc64
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 * @{
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 * @{
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 */
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 */
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/** @file
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/** @file
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 */
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 */
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#ifndef KERN_sparc64_sun4v_CPU_H_
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#ifndef KERN_sparc64_sun4v_CPU_H_
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#define KERN_sparc64_sun4v_CPU_H_
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#define KERN_sparc64_sun4v_CPU_H_
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/* Maximum number of virtual processors. */
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/* Maximum number of virtual processors. */
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#define MAX_NUM_STRANDS     64
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#define MAX_NUM_STRANDS     64
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/*
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/*
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 * Size of pair of pointers (one pointer to kernel stack,
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 * Size of pair of pointers (one pointer to kernel stack,
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 * one to uspace window buffer).
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 * one to uspace window buffer).
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 */
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 */
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#define KSTACK_WBUF_PTR_SIZE    (2 * 8)
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#define KSTACK_WBUF_PTR_SIZE    (2 * 8)
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#ifndef __ASM__
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#ifndef __ASM__
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/**
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/**
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 * Pair of two pointers, the first one points to the kernel stack of
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 * Pair of two pointers, the first one points to the kernel stack of
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 * a userspace thread, the second one points to the userspace window
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 * a userspace thread, the second one points to the userspace window
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 * buffer of the userspace thread. For each CPU there exists exactly
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 * buffer of the userspace thread. For each CPU there exists exactly
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 * one isntance of this structure.
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 * one isntance of this structure.
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 */
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 */
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typedef struct {
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typedef struct {
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    uintptr_t kstack;
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    uintptr_t kstack;
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    uintptr_t wbuf;
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    uintptr_t wbuf;
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} __attribute__ ((packed)) kstack_wbuf_ptr ;
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} __attribute__ ((packed)) kstack_wbuf_ptr ;
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typedef struct {
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typedef struct {
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    uint64_t id;            /**< virtual processor ID */
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    uint64_t id;            /**< virtual processor ID */
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    uint32_t mid;   // TODO: left here only to keep the code compilable!!!     
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    uint32_t mid;   // TODO: left here only to keep the code compilable!!!     
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    uint32_t clock_frequency;   /**< Processor frequency in Hz. */
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    uint32_t clock_frequency;   /**< Processor frequency in Hz. */
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    uint64_t next_tick_cmpr;    /**< Next clock interrupt should be
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    uint64_t next_tick_cmpr;    /**< Next clock interrupt should be
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                         generated when the TICK register
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                         generated when the TICK register
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                         matches this value. */
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                         matches this value. */
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} cpu_arch_t;
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} cpu_arch_t;
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#endif 
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#endif 
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#ifdef __ASM__
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#ifdef __ASM__
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/*
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 * Computes the pointer to the kstack_wbuf_ptr structure of the current CPU.
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 *
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 * Parameters:
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 *  tmpreg1     global register to be used for scratching purposes
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 *  result      register where the resulting pointer will be saved
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 */
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.macro get_kstack_wbuf_ptr tmpreg1, result
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    ! load CPUID to tmpreg1
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    or %g0, SCRATCHPAD_CPUID, \tmpreg1
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    ldxa [\tmpreg1] ASI_SCRATCHPAD, \tmpreg1
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    ! compute offset within the array of kstack_wbuf_ptr structures (each
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    ! such structure is 16 bytes long)
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    mulx \tmpreg1, KSTACK_WBUF_PTR_SIZE, \tmpreg1
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    ! compute the pointer to the structure for the current CPU
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    sethi %hi(kstack_wbuf_ptrs), \result
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    or \result, %lo(kstack_wbuf_ptrs), \result
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    add \result, \tmpreg1, \result
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.endm
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#endif
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#endif
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#endif
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#endif
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/** @}
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/** @}
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 */
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 */
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