/*
* Copyright (c) 2005 Jakub Jermar
* 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/page.h>
#include <arch/mm/tlb.h>
#include <genarch/mm/page_ht.h>
#include <mm/frame.h>
#include <arch/mm/frame.h>
#include <bitops.h>
#include <debug.h>
#include <align.h>
#include <config.h>
#include <ddi/ddi.h>
/** Physical memory area for devices. */
static parea_t dev_area;
#ifdef CONFIG_SMP
/** Entries locked in DTLB of BSP.
*
* Application processors need to have the same locked entries in their DTLBs as
* the bootstrap processor.
*/
static struct {
uintptr_t virt_page;
uintptr_t phys_page;
int pagesize_code;
} bsp_locked_dtlb_entry[DTLB_MAX_LOCKED_ENTRIES];
/** Number of entries in bsp_locked_dtlb_entry array. */
static count_t bsp_locked_dtlb_entries = 0;
#endif /* CONFIG_SMP */
/** Perform sparc64 specific initialization of paging. */
void page_arch_init(void)
{
if (config.cpu_active == 1) {
page_mapping_operations = &ht_mapping_operations;
} else {
#ifdef CONFIG_SMP
unsigned int i;
/*
* Copy locked DTLB entries from the BSP.
*/
for (i = 0; i < bsp_locked_dtlb_entries; i++) {
dtlb_insert_mapping(bsp_locked_dtlb_entry[i].virt_page,
bsp_locked_dtlb_entry[i].phys_page,
bsp_locked_dtlb_entry[i].pagesize_code, true,
false);
}
#endif
}
}
/** Map memory-mapped device into virtual memory.
*
* So far, only DTLB is used to map devices into memory. Chances are that there
* will be only a limited amount of devices that the kernel itself needs to
* lock in DTLB.
*
* @param physaddr Physical address of the page where the device is located.
* Must be at least page-aligned.
* @param size Size of the device's registers. Must not exceed 4M and must
* include extra space caused by the alignment.
*
* @return Virtual address of the page where the device is mapped.
*/
uintptr_t hw_map(uintptr_t physaddr, size_t size)
{
unsigned int order;
unsigned int i;
ASSERT(config.cpu_active == 1);
struct {
int pagesize_code;
size_t increment;
count_t count;
} sizemap[] = {
{ PAGESIZE_8K, 0, 1 }, /* 8K */
{ PAGESIZE_8K, MMU_PAGE_SIZE, 2 }, /* 16K */
{ PAGESIZE_8K, MMU_PAGE_SIZE, 4 }, /* 32K */
{ PAGESIZE_64K, 0, 1}, /* 64K */
{ PAGESIZE_64K, 8 * MMU_PAGE_SIZE, 2 }, /* 128K */
{ PAGESIZE_64K, 8 * MMU_PAGE_SIZE, 4 }, /* 256K */
{ PAGESIZE_512K, 0, 1 }, /* 512K */
{ PAGESIZE_512K, 64 * MMU_PAGE_SIZE, 2 }, /* 1M */
{ PAGESIZE_512K, 64 * MMU_PAGE_SIZE, 4 }, /* 2M */
{ PAGESIZE_4M, 0, 1 }, /* 4M */
{ PAGESIZE_4M, 512 * MMU_PAGE_SIZE, 2 } /* 8M */
};
ASSERT(ALIGN_UP(physaddr, MMU_PAGE_SIZE) == physaddr);
ASSERT(size <= 8 * 1024 * 1024);
if (size <= MMU_FRAME_SIZE)
order = 0;
else
order = (fnzb64(size - 1) + 1) - MMU_FRAME_WIDTH;
/*
* Use virtual addresses that are beyond the limit of physical memory.
* Thus, the physical address space will not be wasted by holes created
* by frame_alloc().
*/
ASSERT(PA2KA(last_frame));
uintptr_t virtaddr = ALIGN_UP(PA2KA(last_frame),
1 << (order + FRAME_WIDTH));
last_frame = ALIGN_UP(KA2PA(virtaddr) + size,
1 << (order + FRAME_WIDTH));
for (i = 0; i < sizemap[order].count; i++) {
/*
* First, insert the mapping into DTLB.
*/
dtlb_insert_mapping(virtaddr + i * sizemap[order].increment,
physaddr + i * sizemap[order].increment,
sizemap[order].pagesize_code, true, false);
#ifdef CONFIG_SMP
/*
* Second, save the information about the mapping for APs.
*/
bsp_locked_dtlb_entry[bsp_locked_dtlb_entries].virt_page =
virtaddr + i * sizemap[order].increment;
bsp_locked_dtlb_entry[bsp_locked_dtlb_entries].phys_page =
physaddr + i * sizemap[order].increment;
bsp_locked_dtlb_entry[bsp_locked_dtlb_entries].pagesize_code =
sizemap[order].pagesize_code;
bsp_locked_dtlb_entries++;
#endif
}
return virtaddr;
}
void hw_area(void)
{
dev_area.pbase = end_frame;
dev_area.frames = SIZE2FRAMES(0x7ffffffffff - end_frame);
ddi_parea_register(&dev_area);
}
/** @}
*/