automake commit without merge history
This commit is contained in:
BVK Chaitanya
parent
265d68cd10
commit
8c41176882
810 changed files with 4980 additions and 2508 deletions
633
grub-core/efiemu/mm.c
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633
grub-core/efiemu/mm.c
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@ -0,0 +1,633 @@
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/* Memory management for efiemu */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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To keep efiemu runtime contiguous this mm is special.
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It uses deferred allocation.
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In the first stage you may request memory with grub_efiemu_request_memalign
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It will give you a handle with which in the second phase you can access your
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memory with grub_efiemu_mm_obtain_request (handle). It's guaranteed that
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subsequent calls with the same handle return the same result. You can't request any additional memory once you're in the second phase
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*/
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#include <grub/err.h>
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#include <grub/normal.h>
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#include <grub/mm.h>
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#include <grub/misc.h>
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#include <grub/machine/memory.h>
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#include <grub/efiemu/efiemu.h>
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struct grub_efiemu_memrequest
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{
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struct grub_efiemu_memrequest *next;
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grub_efi_memory_type_t type;
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grub_size_t size;
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grub_size_t align_overhead;
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int handle;
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void *val;
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};
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/* Linked list of requested memory. */
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static struct grub_efiemu_memrequest *memrequests = 0;
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/* Memory map. */
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static grub_efi_memory_descriptor_t *efiemu_mmap = 0;
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/* Pointer to allocated memory */
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static void *resident_memory = 0;
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/* Size of requested memory per type */
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static grub_size_t requested_memory[GRUB_EFI_MAX_MEMORY_TYPE];
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/* How many slots is allocated for memory_map and how many are already used */
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static int mmap_reserved_size = 0, mmap_num = 0;
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/* Add a memory region to map*/
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static grub_err_t
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grub_efiemu_add_to_mmap (grub_uint64_t start, grub_uint64_t size,
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grub_efi_memory_type_t type)
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{
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grub_uint64_t page_start, npages;
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/* Extend map if necessary*/
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if (mmap_num >= mmap_reserved_size)
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{
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efiemu_mmap = (grub_efi_memory_descriptor_t *)
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grub_realloc (efiemu_mmap, (++mmap_reserved_size)
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* sizeof (grub_efi_memory_descriptor_t));
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if (!efiemu_mmap)
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return grub_error (GRUB_ERR_OUT_OF_MEMORY,
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"not enough space for memory map");
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}
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/* Fill slot*/
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page_start = start - (start % GRUB_EFIEMU_PAGESIZE);
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npages = (size + (start % GRUB_EFIEMU_PAGESIZE) + GRUB_EFIEMU_PAGESIZE - 1)
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/ GRUB_EFIEMU_PAGESIZE;
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efiemu_mmap[mmap_num].physical_start = page_start;
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efiemu_mmap[mmap_num].virtual_start = page_start;
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efiemu_mmap[mmap_num].num_pages = npages;
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efiemu_mmap[mmap_num].type = type;
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mmap_num++;
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return GRUB_ERR_NONE;
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}
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/* Request a resident memory of type TYPE of size SIZE aligned at ALIGN
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ALIGN must be a divisor of page size (if it's a divisor of 4096
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it should be ok on all platforms)
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*/
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int
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grub_efiemu_request_memalign (grub_size_t align, grub_size_t size,
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grub_efi_memory_type_t type)
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{
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grub_size_t align_overhead;
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struct grub_efiemu_memrequest *ret, *cur, *prev;
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/* Check that the request is correct */
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if (type >= GRUB_EFI_MAX_MEMORY_TYPE || type <= GRUB_EFI_LOADER_CODE)
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return -2;
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/* Add new size to requested size */
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align_overhead = align - (requested_memory[type]%align);
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if (align_overhead == align)
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align_overhead = 0;
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requested_memory[type] += align_overhead + size;
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/* Remember the request */
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ret = grub_zalloc (sizeof (*ret));
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if (!ret)
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return -1;
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ret->type = type;
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ret->size = size;
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ret->align_overhead = align_overhead;
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prev = 0;
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/* Add request to the end of the chain.
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It should be at the end because otherwise alignment isn't guaranteed */
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for (cur = memrequests; cur; prev = cur, cur = cur->next);
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if (prev)
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{
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ret->handle = prev->handle + 1;
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prev->next = ret;
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}
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else
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{
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ret->handle = 1; /* Avoid 0 handle*/
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memrequests = ret;
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}
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return ret->handle;
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}
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/* Really allocate the memory */
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static grub_err_t
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efiemu_alloc_requests (void)
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{
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grub_size_t align_overhead = 0;
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grub_uint8_t *curptr, *typestart;
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struct grub_efiemu_memrequest *cur;
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grub_size_t total_alloc = 0;
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unsigned i;
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/* Order of memory regions */
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grub_efi_memory_type_t reqorder[] =
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{
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/* First come regions usable by OS*/
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GRUB_EFI_LOADER_CODE,
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GRUB_EFI_LOADER_DATA,
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GRUB_EFI_BOOT_SERVICES_CODE,
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GRUB_EFI_BOOT_SERVICES_DATA,
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GRUB_EFI_CONVENTIONAL_MEMORY,
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GRUB_EFI_ACPI_RECLAIM_MEMORY,
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/* Then memory used by runtime */
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/* This way all our regions are in a single block */
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GRUB_EFI_RUNTIME_SERVICES_CODE,
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GRUB_EFI_RUNTIME_SERVICES_DATA,
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GRUB_EFI_ACPI_MEMORY_NVS,
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/* And then unavailable memory types. This is more for a completeness.
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You should double think before allocating memory of any of these types
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*/
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GRUB_EFI_UNUSABLE_MEMORY,
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GRUB_EFI_MEMORY_MAPPED_IO,
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GRUB_EFI_MEMORY_MAPPED_IO_PORT_SPACE,
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GRUB_EFI_PAL_CODE
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};
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/* Compute total memory needed */
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for (i = 0; i < sizeof (reqorder) / sizeof (reqorder[0]); i++)
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{
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align_overhead = GRUB_EFIEMU_PAGESIZE
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- (requested_memory[reqorder[i]] % GRUB_EFIEMU_PAGESIZE);
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if (align_overhead == GRUB_EFIEMU_PAGESIZE)
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align_overhead = 0;
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total_alloc += requested_memory[reqorder[i]] + align_overhead;
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}
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/* Allocate the whole memory in one block */
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resident_memory = grub_memalign (GRUB_EFIEMU_PAGESIZE, total_alloc);
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if (!resident_memory)
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return grub_error (GRUB_ERR_OUT_OF_MEMORY,
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"couldn't allocate resident memory");
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/* Split the memory into blocks by type */
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curptr = resident_memory;
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for (i = 0; i < sizeof (reqorder) / sizeof (reqorder[0]); i++)
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{
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if (!requested_memory[reqorder[i]])
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continue;
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typestart = curptr;
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/* Write pointers to requests */
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for (cur = memrequests; cur; cur = cur->next)
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if (cur->type == reqorder[i])
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{
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curptr = ((grub_uint8_t *)curptr) + cur->align_overhead;
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cur->val = curptr;
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curptr = ((grub_uint8_t *)curptr) + cur->size;
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}
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/* Ensure that the regions are page-aligned */
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align_overhead = GRUB_EFIEMU_PAGESIZE
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- (requested_memory[reqorder[i]] % GRUB_EFIEMU_PAGESIZE);
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if (align_overhead == GRUB_EFIEMU_PAGESIZE)
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align_overhead = 0;
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curptr = ((grub_uint8_t *)curptr) + align_overhead;
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/* Add the region to memory map */
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grub_efiemu_add_to_mmap (PTR_TO_UINT64 (typestart),
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curptr - typestart, reqorder[i]);
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}
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return GRUB_ERR_NONE;
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}
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/* Get a pointer to requested memory from handle */
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void *
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grub_efiemu_mm_obtain_request (int handle)
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{
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struct grub_efiemu_memrequest *cur;
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for (cur = memrequests; cur; cur = cur->next)
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if (cur->handle == handle)
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return cur->val;
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return 0;
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}
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/* Get type of requested memory by handle */
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grub_efi_memory_type_t
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grub_efiemu_mm_get_type (int handle)
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{
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struct grub_efiemu_memrequest *cur;
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for (cur = memrequests; cur; cur = cur->next)
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if (cur->handle == handle)
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return cur->type;
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return 0;
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}
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/* Free a request */
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void
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grub_efiemu_mm_return_request (int handle)
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{
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struct grub_efiemu_memrequest *cur, *prev;
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/* Remove head if necessary */
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while (memrequests && memrequests->handle == handle)
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{
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cur = memrequests->next;
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grub_free (memrequests);
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memrequests = cur;
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}
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if (!memrequests)
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return;
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/* Remove request from a middle of chain*/
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for (prev = memrequests, cur = prev->next; cur;)
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if (cur->handle == handle)
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{
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prev->next = cur->next;
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grub_free (cur);
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cur = prev->next;
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}
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else
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{
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prev = cur;
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cur = prev->next;
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}
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}
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/* Reserve space for memory map */
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static grub_err_t
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grub_efiemu_mmap_init (void)
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{
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auto int NESTED_FUNC_ATTR bounds_hook (grub_uint64_t, grub_uint64_t,
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grub_uint32_t);
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int NESTED_FUNC_ATTR bounds_hook (grub_uint64_t addr __attribute__ ((unused)),
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grub_uint64_t size __attribute__ ((unused)),
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grub_uint32_t type __attribute__ ((unused)))
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{
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mmap_reserved_size++;
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return 0;
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}
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// the place for memory used by efiemu itself
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mmap_reserved_size = GRUB_EFI_MAX_MEMORY_TYPE + 1;
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#ifndef GRUB_MACHINE_EMU
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grub_machine_mmap_iterate (bounds_hook);
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#endif
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return GRUB_ERR_NONE;
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}
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/* This is a drop-in replacement of grub_efi_get_memory_map */
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/* Get the memory map as defined in the EFI spec. Return 1 if successful,
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return 0 if partial, or return -1 if an error occurs. */
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int
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grub_efiemu_get_memory_map (grub_efi_uintn_t *memory_map_size,
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grub_efi_memory_descriptor_t *memory_map,
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grub_efi_uintn_t *map_key,
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grub_efi_uintn_t *descriptor_size,
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grub_efi_uint32_t *descriptor_version)
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{
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if (!efiemu_mmap)
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{
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grub_error (GRUB_ERR_INVALID_COMMAND,
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"you need to first launch efiemu_prepare");
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return -1;
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}
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if (*memory_map_size < mmap_num * sizeof (grub_efi_memory_descriptor_t))
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{
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*memory_map_size = mmap_num * sizeof (grub_efi_memory_descriptor_t);
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return 0;
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}
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*memory_map_size = mmap_num * sizeof (grub_efi_memory_descriptor_t);
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grub_memcpy (memory_map, efiemu_mmap, *memory_map_size);
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if (descriptor_size)
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*descriptor_size = sizeof (grub_efi_memory_descriptor_t);
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if (descriptor_version)
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*descriptor_version = 1;
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if (map_key)
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*map_key = 0;
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return 1;
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}
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/* Free everything */
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grub_err_t
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grub_efiemu_mm_unload (void)
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{
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struct grub_efiemu_memrequest *cur, *d;
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for (cur = memrequests; cur;)
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{
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d = cur->next;
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grub_free (cur);
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cur = d;
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}
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memrequests = 0;
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grub_memset (&requested_memory, 0, sizeof (requested_memory));
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grub_free (resident_memory);
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resident_memory = 0;
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grub_free (efiemu_mmap);
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efiemu_mmap = 0;
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mmap_reserved_size = mmap_num = 0;
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return GRUB_ERR_NONE;
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}
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/* This function should be called before doing any requests */
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grub_err_t
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grub_efiemu_mm_init (void)
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{
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grub_err_t err;
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err = grub_efiemu_mm_unload ();
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if (err)
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return err;
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grub_efiemu_mmap_init ();
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return GRUB_ERR_NONE;
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}
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/* Copy host memory map */
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static grub_err_t
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grub_efiemu_mmap_fill (void)
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{
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auto int NESTED_FUNC_ATTR fill_hook (grub_uint64_t, grub_uint64_t, grub_uint32_t);
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int NESTED_FUNC_ATTR fill_hook (grub_uint64_t addr,
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grub_uint64_t size,
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grub_uint32_t type)
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{
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switch (type)
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{
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case GRUB_MACHINE_MEMORY_AVAILABLE:
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return grub_efiemu_add_to_mmap (addr, size,
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GRUB_EFI_CONVENTIONAL_MEMORY);
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#ifdef GRUB_MACHINE_MEMORY_ACPI
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case GRUB_MACHINE_MEMORY_ACPI:
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return grub_efiemu_add_to_mmap (addr, size,
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GRUB_EFI_ACPI_RECLAIM_MEMORY);
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#endif
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#ifdef GRUB_MACHINE_MEMORY_NVS
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case GRUB_MACHINE_MEMORY_NVS:
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return grub_efiemu_add_to_mmap (addr, size,
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GRUB_EFI_ACPI_MEMORY_NVS);
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#endif
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default:
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grub_printf ("Unknown memory type %d. Marking as unusable\n", type);
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case GRUB_MACHINE_MEMORY_RESERVED:
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return grub_efiemu_add_to_mmap (addr, size,
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GRUB_EFI_UNUSABLE_MEMORY);
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}
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}
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#ifndef GRUB_MACHINE_EMU
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grub_machine_mmap_iterate (fill_hook);
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#endif
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return GRUB_ERR_NONE;
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}
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grub_err_t
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grub_efiemu_mmap_iterate (int NESTED_FUNC_ATTR (*hook) (grub_uint64_t,
|
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grub_uint64_t,
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grub_uint32_t))
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{
|
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unsigned i;
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for (i = 0; i < (unsigned) mmap_num; i++)
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switch (efiemu_mmap[i].type)
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{
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case GRUB_EFI_RUNTIME_SERVICES_CODE:
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hook (efiemu_mmap[i].physical_start, efiemu_mmap[i].num_pages * 4096,
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GRUB_EFIEMU_MEMORY_CODE);
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break;
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case GRUB_EFI_RESERVED_MEMORY_TYPE:
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case GRUB_EFI_RUNTIME_SERVICES_DATA:
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case GRUB_EFI_UNUSABLE_MEMORY:
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case GRUB_EFI_MEMORY_MAPPED_IO:
|
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case GRUB_EFI_MEMORY_MAPPED_IO_PORT_SPACE:
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case GRUB_EFI_PAL_CODE:
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case GRUB_EFI_MAX_MEMORY_TYPE:
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hook (efiemu_mmap[i].physical_start, efiemu_mmap[i].num_pages * 4096,
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GRUB_EFIEMU_MEMORY_RESERVED);
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break;
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case GRUB_EFI_LOADER_CODE:
|
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case GRUB_EFI_LOADER_DATA:
|
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case GRUB_EFI_BOOT_SERVICES_CODE:
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case GRUB_EFI_BOOT_SERVICES_DATA:
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case GRUB_EFI_CONVENTIONAL_MEMORY:
|
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hook (efiemu_mmap[i].physical_start, efiemu_mmap[i].num_pages * 4096,
|
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GRUB_EFIEMU_MEMORY_AVAILABLE);
|
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break;
|
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case GRUB_EFI_ACPI_RECLAIM_MEMORY:
|
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hook (efiemu_mmap[i].physical_start, efiemu_mmap[i].num_pages * 4096,
|
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GRUB_EFIEMU_MEMORY_ACPI);
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break;
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case GRUB_EFI_ACPI_MEMORY_NVS:
|
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hook (efiemu_mmap[i].physical_start, efiemu_mmap[i].num_pages * 4096,
|
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GRUB_EFIEMU_MEMORY_NVS);
|
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break;
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||||
}
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||||
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return 0;
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||||
}
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||||
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|
||||
/* This function resolves overlapping regions and sorts the memory map
|
||||
It uses scanline (sweeping) algorithm
|
||||
*/
|
||||
static grub_err_t
|
||||
grub_efiemu_mmap_sort_and_uniq (void)
|
||||
{
|
||||
/* If same page is used by multiple types it's resolved
|
||||
according to priority
|
||||
0 - free memory
|
||||
1 - memory immediately usable after ExitBootServices
|
||||
2 - memory usable after loading ACPI tables
|
||||
3 - efiemu memory
|
||||
4 - unusable memory
|
||||
*/
|
||||
int priority[GRUB_EFI_MAX_MEMORY_TYPE] =
|
||||
{
|
||||
[GRUB_EFI_RESERVED_MEMORY_TYPE] = 4,
|
||||
[GRUB_EFI_LOADER_CODE] = 1,
|
||||
[GRUB_EFI_LOADER_DATA] = 1,
|
||||
[GRUB_EFI_BOOT_SERVICES_CODE] = 1,
|
||||
[GRUB_EFI_BOOT_SERVICES_DATA] = 1,
|
||||
[GRUB_EFI_RUNTIME_SERVICES_CODE] = 3,
|
||||
[GRUB_EFI_RUNTIME_SERVICES_DATA] = 3,
|
||||
[GRUB_EFI_CONVENTIONAL_MEMORY] = 0,
|
||||
[GRUB_EFI_UNUSABLE_MEMORY] = 4,
|
||||
[GRUB_EFI_ACPI_RECLAIM_MEMORY] = 2,
|
||||
[GRUB_EFI_ACPI_MEMORY_NVS] = 3,
|
||||
[GRUB_EFI_MEMORY_MAPPED_IO] = 4,
|
||||
[GRUB_EFI_MEMORY_MAPPED_IO_PORT_SPACE] = 4,
|
||||
[GRUB_EFI_PAL_CODE] = 4
|
||||
};
|
||||
|
||||
int i, j, k, done;
|
||||
|
||||
/* Scanline events */
|
||||
struct grub_efiemu_mmap_scan
|
||||
{
|
||||
/* At which memory address*/
|
||||
grub_uint64_t pos;
|
||||
/* 0 = region starts, 1 = region ends */
|
||||
int type;
|
||||
/* Which type of memory region */
|
||||
grub_efi_memory_type_t memtype;
|
||||
};
|
||||
struct grub_efiemu_mmap_scan *scanline_events;
|
||||
struct grub_efiemu_mmap_scan t;
|
||||
|
||||
/* Previous scanline event */
|
||||
grub_uint64_t lastaddr;
|
||||
int lasttype;
|
||||
/* Current scanline event */
|
||||
int curtype;
|
||||
/* how many regions of given type overlap at current location */
|
||||
int present[GRUB_EFI_MAX_MEMORY_TYPE];
|
||||
/* Here is stored the resulting memory map*/
|
||||
grub_efi_memory_descriptor_t *result;
|
||||
|
||||
/* Initialize variables*/
|
||||
grub_memset (present, 0, sizeof (int) * GRUB_EFI_MAX_MEMORY_TYPE);
|
||||
scanline_events = (struct grub_efiemu_mmap_scan *)
|
||||
grub_malloc (sizeof (struct grub_efiemu_mmap_scan) * 2 * mmap_num);
|
||||
|
||||
/* Number of chunks can't increase more than by factor of 2 */
|
||||
result = (grub_efi_memory_descriptor_t *)
|
||||
grub_malloc (sizeof (grub_efi_memory_descriptor_t) * 2 * mmap_num);
|
||||
if (!result || !scanline_events)
|
||||
{
|
||||
grub_free (result);
|
||||
grub_free (scanline_events);
|
||||
return grub_error (GRUB_ERR_OUT_OF_MEMORY,
|
||||
"couldn't allocate space for new memory map");
|
||||
}
|
||||
|
||||
/* Register scanline events */
|
||||
for (i = 0; i < mmap_num; i++)
|
||||
{
|
||||
scanline_events[2 * i].pos = efiemu_mmap[i].physical_start;
|
||||
scanline_events[2 * i].type = 0;
|
||||
scanline_events[2 * i].memtype = efiemu_mmap[i].type;
|
||||
scanline_events[2 * i + 1].pos = efiemu_mmap[i].physical_start
|
||||
+ efiemu_mmap[i].num_pages * GRUB_EFIEMU_PAGESIZE;
|
||||
scanline_events[2 * i + 1].type = 1;
|
||||
scanline_events[2 * i + 1].memtype = efiemu_mmap[i].type;
|
||||
}
|
||||
|
||||
/* Primitive bubble sort. It has complexity O(n^2) but since we're
|
||||
unlikely to have more than 100 chunks it's probably one of the
|
||||
fastest for one purpose */
|
||||
done = 1;
|
||||
while (done)
|
||||
{
|
||||
done = 0;
|
||||
for (i = 0; i < 2 * mmap_num - 1; i++)
|
||||
if (scanline_events[i + 1].pos < scanline_events[i].pos)
|
||||
{
|
||||
t = scanline_events[i + 1];
|
||||
scanline_events[i + 1] = scanline_events[i];
|
||||
scanline_events[i] = t;
|
||||
done = 1;
|
||||
}
|
||||
}
|
||||
|
||||
/* Pointer in resulting memory map */
|
||||
j = 0;
|
||||
lastaddr = scanline_events[0].pos;
|
||||
lasttype = scanline_events[0].memtype;
|
||||
for (i = 0; i < 2 * mmap_num; i++)
|
||||
{
|
||||
/* Process event */
|
||||
if (scanline_events[i].type)
|
||||
present[scanline_events[i].memtype]--;
|
||||
else
|
||||
present[scanline_events[i].memtype]++;
|
||||
|
||||
/* Determine current region type */
|
||||
curtype = -1;
|
||||
for (k = 0; k < GRUB_EFI_MAX_MEMORY_TYPE; k++)
|
||||
if (present[k] && (curtype == -1 || priority[k] > priority[curtype]))
|
||||
curtype = k;
|
||||
|
||||
/* Add memory region to resulting map if necessary */
|
||||
if ((curtype == -1 || curtype != lasttype)
|
||||
&& lastaddr != scanline_events[i].pos
|
||||
&& lasttype != -1)
|
||||
{
|
||||
result[j].virtual_start = result[j].physical_start = lastaddr;
|
||||
result[j].num_pages = (scanline_events[i].pos - lastaddr)
|
||||
/ GRUB_EFIEMU_PAGESIZE;
|
||||
result[j].type = lasttype;
|
||||
|
||||
/* We set runtime attribute on pages we need to be mapped */
|
||||
result[j].attribute
|
||||
= (lasttype == GRUB_EFI_RUNTIME_SERVICES_CODE
|
||||
|| lasttype == GRUB_EFI_RUNTIME_SERVICES_DATA)
|
||||
? GRUB_EFI_MEMORY_RUNTIME : 0;
|
||||
grub_dprintf ("efiemu",
|
||||
"mmap entry: type %d start 0x%llx 0x%llx pages\n",
|
||||
result[j].type,
|
||||
result[j].physical_start, result[j].num_pages);
|
||||
j++;
|
||||
}
|
||||
|
||||
/* Update last values if necessary */
|
||||
if (curtype == -1 || curtype != lasttype)
|
||||
{
|
||||
lasttype = curtype;
|
||||
lastaddr = scanline_events[i].pos;
|
||||
}
|
||||
}
|
||||
|
||||
grub_free (scanline_events);
|
||||
|
||||
/* Shrink resulting memory map to really used size and replace efiemu_mmap
|
||||
by new value */
|
||||
grub_free (efiemu_mmap);
|
||||
efiemu_mmap = grub_realloc (result, j * sizeof (*result));
|
||||
return GRUB_ERR_NONE;
|
||||
}
|
||||
|
||||
/* This function is called to switch from first to second phase */
|
||||
grub_err_t
|
||||
grub_efiemu_mm_do_alloc (void)
|
||||
{
|
||||
grub_err_t err;
|
||||
|
||||
/* Preallocate mmap */
|
||||
efiemu_mmap = (grub_efi_memory_descriptor_t *)
|
||||
grub_malloc (mmap_reserved_size * sizeof (grub_efi_memory_descriptor_t));
|
||||
if (!efiemu_mmap)
|
||||
{
|
||||
grub_efiemu_unload ();
|
||||
return grub_error (GRUB_ERR_OUT_OF_MEMORY, "couldn't initialize mmap");
|
||||
}
|
||||
|
||||
if ((err = efiemu_alloc_requests ()))
|
||||
return err;
|
||||
if ((err = grub_efiemu_mmap_fill ()))
|
||||
return err;
|
||||
return grub_efiemu_mmap_sort_and_uniq ();
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue