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899d13d0df
A new CBFS API is introduced to allow making CBFS access easier for providing multiple CBFS sources. That is achieved by decoupling the cbfs source from a CBFS file. A CBFS source is described by a descriptor. It contains the necessary properties for walking a CBFS to locate a file. The CBFS file is then decoupled from the CBFS descriptor in that it's no longer needed to access the contents of the file. All of this is accomplished using the regions infrastructure by repsenting CBFS sources and files as region_devices. Because region_devices can be chained together forming subregions this allows one to decouple a CBFS source from a file. This also allows one to provide CBFS files that came from other sources for payload and/or stage loading. The program loading takes advantage of those very properties by allowing multiple sources for locating a program. Because of this we can reduce the overhead of loading programs because it's all done in the common code paths. Only locating the program is per source. Change-Id: I339b84fce95f03d1dbb63a0f54a26be5eb07f7c8 Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/9134 Tested-by: build bot (Jenkins) Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
105 lines
3.2 KiB
C
105 lines
3.2 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright 2014 Google Inc.
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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.
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*/
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/* This file contains macro definitions for memlayout.ld linker scripts. */
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#ifndef __MEMLAYOUT_H
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#define __MEMLAYOUT_H
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#include <arch/memlayout.h>
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#define STR(x) #x
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#define SET_COUNTER(name, addr) \
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_ = ASSERT(. <= addr, STR(name overlaps the previous region!)); \
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. = addr;
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#define SYMBOL(name, addr) \
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SET_COUNTER(name, addr) \
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_##name = .;
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#define REGION(name, addr, size, expected_align) \
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SYMBOL(name, addr) \
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_ = ASSERT(. == ALIGN(expected_align), \
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STR(name must be aligned to expected_align!)); \
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SYMBOL(e##name, addr + size)
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/* Declare according to SRAM/DRAM ranges in SoC hardware-defined address map. */
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#define SRAM_START(addr) SYMBOL(sram, addr)
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#define SRAM_END(addr) SYMBOL(esram, addr)
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#define DRAM_START(addr) SYMBOL(dram, addr)
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#define PRERAM_CBMEM_CONSOLE(addr, size) \
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REGION(preram_cbmem_console, addr, size, 4)
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/* Use either CBFS_CACHE (unified) or both (PRERAM|POSTRAM)_CBFS_CACHE */
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#define CBFS_CACHE(addr, size) REGION(cbfs_cache, addr, size, 4)
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/* TODO: This only works if you never access CBFS in romstage before RAM is up!
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* If you need to change that assumption, you have some work ahead of you... */
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#if defined(__PRE_RAM__) && !defined(__ROMSTAGE__)
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#define PRERAM_CBFS_CACHE(addr, size) CBFS_CACHE(addr, size)
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#define POSTRAM_CBFS_CACHE(addr, size) \
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REGION(unused_cbfs_cache, addr, size, 4)
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#else
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#define PRERAM_CBFS_CACHE(addr, size) \
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REGION(unused_cbfs_cache, addr, size, 4)
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#define POSTRAM_CBFS_CACHE(addr, size) CBFS_CACHE(addr, size)
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#endif
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/* Careful: 'INCLUDE <filename>' must always be at the end of the output line */
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#ifdef __BOOTBLOCK__
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#define BOOTBLOCK(addr, sz) \
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SET_COUNTER(bootblock, addr) \
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_ = ASSERT(_ebootblock - _bootblock <= sz, \
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STR(Bootblock exceeded its allotted size! (sz))); \
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INCLUDE "lib/bootblock.bootblock.ld"
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#else
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#define BOOTBLOCK(addr, sz) \
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SET_COUNTER(bootblock, addr) \
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. += sz;
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#endif
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#ifdef __ROMSTAGE__
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#define ROMSTAGE(addr, sz) \
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SET_COUNTER(romstage, addr) \
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_ = ASSERT(_eromstage - _romstage <= sz, \
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STR(Romstage exceeded its allotted size! (sz))); \
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INCLUDE "lib/romstage.romstage.ld"
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#else
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#define ROMSTAGE(addr, sz) \
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SET_COUNTER(romstage, addr) \
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. += sz;
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#endif
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#ifdef __RAMSTAGE__
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#define RAMSTAGE(addr, sz) \
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SET_COUNTER(ramstage, addr) \
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_ = ASSERT(_eramstage - _ramstage <= sz, \
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STR(Ramstage exceeded its allotted size! (sz))); \
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INCLUDE "lib/ramstage.ramstage.ld"
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#else
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#define RAMSTAGE(addr, sz) \
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SET_COUNTER(ramstage, addr) \
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. += sz;
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#endif
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#endif /* __MEMLAYOUT_H */
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