| 0,0 → 1,168 |
|---|
| /* |
| * 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> |
| |
| #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_ENTRY_COUNT]; |
| |
| /** 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; |
| } |
| |
| /** @} |
| */ |