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https://github.com/fail0verflow/switch-coreboot.git
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43ab8bd2f9
Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de> Acked-by: Uwe Hermann <uwe@hermann-uwe.de> git-svn-id: svn://coreboot.org/repository/LinuxBIOSv3@116 f3766cd6-281f-0410-b1cd-43a5c92072e9
75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
/*
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* This file is part of the LinuxBIOS project.
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*
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* Copyright (C) 2007 Ronald G. Minnich <rminnich@gmail.com>
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*
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* This program 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; version 2 of the License.
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*
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* This program 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 this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
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*/
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/*
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* Simple non-freeing malloc. There have been about a million versions of
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* this but we need one with a known author. Almost every OS and bootloader
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* has had this at some time or other.
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*/
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#include <stdlib.h>
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#include <console/console.h>
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#if 0
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#define MALLOCDBG(x...)
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#else
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#define MALLOCDBG(x...) printk (BIOS_SPEW, x)
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#endif
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/* instead of ldscript magic, just declare an array. The array
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* will consume no bytes in the image, and it won't run into trouble
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* the way the V2 allocator could. We do not provide zero'd memory.
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* note that the execute-in-place code in top of flash is not allowed to call malloc,
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* since we can't link this in to it. The FLASH-based code should always be dead simple.
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* (in fact, it's not clear we need malloc at all any more -- we're doing our best to
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* remove all usage of it -- the only real users were elfboot and lzma, and we have
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* removed its usage in elfboot, and will try to remove its usage in lzma).
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*/
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#define HEAPSIZE (256*1024)
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static unsigned char heap[HEAPSIZE];
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static unsigned char * free_mem_ptr = heap;
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static unsigned long freebytes = HEAPSIZE;
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void *malloc(size_t size)
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{
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void *p;
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MALLOCDBG("%s Enter, size %d, free_mem_ptr %p\n", __FUNCTION__, size, free_mem_ptr);
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if (size > freebytes){
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printk(BIOS_ERR, "OUT OF MEMORY for alloc of %d bytes\n", size);
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die("OUT OF MEMORY\n");
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}
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size = (size + 3) & 3; /* Align */
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p = free_mem_ptr;
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free_mem_ptr += size;
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freebytes -= size;
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MALLOCDBG("malloc 0x%08lx\n", (unsigned long)p);
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return p;
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}
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void free(void *where)
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{
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/* Don't care */
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}
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