898de6111a
Some simple implementation of the MultiBoot protocol may not pass a memory map (MULTIBOOT_FLAGS_MMAP missing in the flags) but just the two values for low and high memory, indicated by the MULTIBOOT_FLAGS_MEMINFO flag. Support those kind of boot loaders too, instead of falling back to the hard-coded values in lib_get_sysinfo(). Tested with a multiboot enhanced version of FILO. Change-Id: I22cf9e3ec0075aff040390bd177c5cd22d439b81 Signed-off-by: Mathias Krause <minipli@googlemail.com> Reviewed-on: https://review.coreboot.org/18350 Tested-by: build bot (Jenkins) Reviewed-by: Nico Huber <nico.h@gmx.de>
129 lines
3.7 KiB
C
129 lines
3.7 KiB
C
/*
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* This file is part of the libpayload project.
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*
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* Copyright (C) 2008 Advanced Micro Devices, Inc.
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*
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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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* are met:
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* 1. 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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* 2. 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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* documentation and/or other materials provided with the distribution.
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* 3. 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <libpayload-config.h>
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#include <libpayload.h>
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#include <multiboot_tables.h>
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extern unsigned long loader_eax;
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extern unsigned long loader_ebx;
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static int mb_add_memrange(struct sysinfo_t *info, unsigned long long base,
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unsigned long long size, unsigned int type)
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{
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if (info->n_memranges >= SYSINFO_MAX_MEM_RANGES)
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return -1;
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#if IS_ENABLED(CONFIG_LP_MEMMAP_RAM_ONLY)
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/* 1 == normal RAM. Ignore everything else for now */
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if (type != 1)
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return 0;
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#endif
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info->memrange[info->n_memranges].base = base;
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info->memrange[info->n_memranges].size = size;
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info->memrange[info->n_memranges].type = type;
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info->n_memranges++;
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return 0;
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}
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static void mb_parse_mmap(struct multiboot_header *table,
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struct sysinfo_t *info)
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{
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u8 *start = (u8 *) phys_to_virt(table->mmap_addr);
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u8 *ptr = start;
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info->n_memranges = 0;
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while(ptr < (start + table->mmap_length)) {
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struct multiboot_mmap *mmap = (struct multiboot_mmap *) ptr;
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if (mb_add_memrange(info, mmap->addr, mmap->length, mmap->type))
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return;
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ptr += (mmap->size + sizeof(mmap->size));
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}
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}
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static void mb_parse_meminfo(struct multiboot_header *table,
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struct sysinfo_t *info)
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{
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unsigned long long mem_low = table->mem_lower;
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unsigned long long mem_high = table->mem_higher;
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info->n_memranges = 0;
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if (mem_low)
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mb_add_memrange(info, 0 * MiB, mem_low * KiB, 1);
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if (mem_high)
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mb_add_memrange(info, 1 * MiB, mem_high * KiB, 1);
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}
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static void mb_parse_cmdline(struct multiboot_header *table)
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{
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extern int main_argc;
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extern char *main_argv[];
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char *c = phys_to_virt(table->cmdline);
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while(*c != '\0' && main_argc < MAX_ARGC_COUNT) {
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main_argv[main_argc++] = c;
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for( ; *c != '\0' && !isspace(*c); c++);
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if (*c) {
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*c = 0;
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c++;
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}
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}
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}
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int get_multiboot_info(struct sysinfo_t *info)
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{
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struct multiboot_header *table;
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if (loader_eax != MULTIBOOT_MAGIC)
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return -1;
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table = (struct multiboot_header *) phys_to_virt(loader_ebx);
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info->mbtable = phys_to_virt(loader_ebx);
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if (table->flags & MULTIBOOT_FLAGS_MMAP)
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mb_parse_mmap(table, info);
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else if (table->flags & MULTIBOOT_FLAGS_MEMINFO)
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mb_parse_meminfo(table, info);
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if (table->flags & MULTIBOOT_FLAGS_CMDLINE)
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mb_parse_cmdline(table);
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return 0;
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}
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