/*
* Copyright (c) 2006 Jakub Jermar
* Copyright (c) 2009 Pavel Rimsky
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup sparc64mm
* @{
*/
/** @file
*/
#include <arch/mm/as.h>
#include <arch/mm/pagesize.h>
#include <arch/mm/tlb.h>
#include <genarch/mm/page_ht.h>
#include <genarch/mm/asid_fifo.h>
#include <debug.h>
#include <config.h>
#include <arch/sun4v/hypercall.h>
#ifdef CONFIG_TSB
#include <arch/mm/tsb.h>
#include <arch/memstr.h>
#include <arch/asm.h>
#include <mm/frame.h>
#include <bitops.h>
#include <macros.h>
#endif /* CONFIG_TSB */
/** Architecture dependent address space init. */
void as_arch_init(void)
{
if (config.cpu_active == 1) {
as_operations = &as_ht_operations;
asid_fifo_init();
}
}
int as_constructor_arch(as_t *as, int flags)
{
#ifdef CONFIG_TSB
int order = fnzb32(
(TSB_ENTRY_COUNT * sizeof(tsb_entry_t)) >> FRAME_WIDTH);
uintptr_t tsb = (uintptr_t) frame_alloc(order, flags);
if (!tsb)
return -1;
as->arch.tsb_description.page_size = PAGESIZE_8K;
as->arch.tsb_description.associativity = 1;
as->arch.tsb_description.num_ttes = TSB_ENTRY_COUNT;
as->arch.tsb_description.pgsize_mask = 1 << PAGESIZE_8K;
as->arch.tsb_description.tsb_base = tsb;
as->arch.tsb_description.reserved = 0;
as->arch.tsb_description.context = 0;
memsetb((void *) PA2KA(as->arch.tsb_description.tsb_base),
TSB_ENTRY_COUNT * sizeof(tsb_entry_t), 0);
#endif
return 0;
}
int as_destructor_arch(as_t *as)
{
#ifdef CONFIG_TSB
count_t cnt = (TSB_ENTRY_COUNT * sizeof(tsb_entry_t)) >> FRAME_WIDTH;
frame_free((uintptr_t) as->arch.tsb_description.tsb_base);
return cnt;
#else
return 0;
#endif
}
int as_create_arch(as_t *as, int flags)
{
#ifdef CONFIG_TSB
tsb_invalidate(as, 0, (count_t) -1);
#endif
return 0;
}
/** Perform sparc64-specific tasks when an address space becomes active on the
* processor.
*
* Install ASID and map TSBs.
*
* @param as Address space.
*/
void as_install_arch(as_t *as)
{
mmu_secondary_context_write(as->asid);
#ifdef CONFIG_TSB
uintptr_t base = ALIGN_DOWN(config.base, 1 << KERNEL_PAGE_WIDTH);
ASSERT(as->arch.tsb_description.tsb_base);
uintptr_t tsb = PA2KA(as->arch.tsb_description.tsb_base);
if (!overlaps(tsb, 8 * MMU_PAGE_SIZE, base, 1 << KERNEL_PAGE_WIDTH)) {
/*
* TSBs were allocated from memory not covered
* by the locked 4M kernel DTLB entry. We need
* to map both TSBs explicitly.
*/
mmu_demap_page(tsb, 0, MMU_FLAG_DTLB);
dtlb_insert_mapping(tsb, KA2PA(tsb), PAGESIZE_64K, true, true);
}
__hypercall_fast2(MMU_TSB_CTXNON0, 1, KA2PA(&(as->arch.tsb_description)));
#endif
}
/** Perform sparc64-specific tasks when an address space is removed from the
* processor.
*
* Demap TSBs.
*
* @param as Address space.
*/
void as_deinstall_arch(as_t *as)
{
/*
* Note that we don't and may not lock the address space. That's ok
* since we only read members that are currently read-only.
*
* Moreover, the as->asid is protected by asidlock, which is being held.
*/
#ifdef CONFIG_TSB
uintptr_t base = ALIGN_DOWN(config.base, 1 << KERNEL_PAGE_WIDTH);
ASSERT(as->arch.tsb_description.tsb_base);
uintptr_t tsb = PA2KA(as->arch.tsb_description.tsb_base);
if (!overlaps(tsb, 8 * MMU_PAGE_SIZE, base, 1 << KERNEL_PAGE_WIDTH)) {
/*
* TSBs were allocated from memory not covered
* by the locked 4M kernel DTLB entry. We need
* to demap the entry installed by as_install_arch().
*/
__hypercall_fast3(MMU_UNMAP_PERM_ADDR, tsb, 0, MMU_FLAG_DTLB);
}
#endif
}
/** @}
*/