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1936f6cf25
In order to accommodate tracking timestamps in all the __PRE_RAM__ stages (bootblock, verstage, romstage, etc) of a platform one needs to provide a way to specify a persistent region of SRAM or cache-as-ram to store the timestamps until cbmem comes online. Provide that infrastructure. Based on original patches from chromium.org: Original-Change-Id: I4d78653c0595523eeeb02115423e7fecceea5e1e Original-Signed-off-by: Furquan Shaikh <furquan@google.com> Original-Reviewed-on: https://chromium-review.googlesource.com/223348 Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Original-Reviewed-by: Patrick Georgi <pgeorgi@chromium.org> Original-Tested-by: Furquan Shaikh <furquan@chromium.org> Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org> Original-Change-Id: Ie5ffda3112d626068bd1904afcc5a09bc4916d16 Original-Signed-off-by: Furquan Shaikh <furquan@google.com> Original-Reviewed-on: https://chromium-review.googlesource.com/224024 Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org> Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org> Original-Tested-by: Furquan Shaikh <furquan@chromium.org> Change-Id: I8779526136e89ae61a6f177ce5c74a6530469ae1 Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/10790 Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Tested-by: build bot (Jenkins)
109 lines
3.2 KiB
C
109 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 TIMESTAMP(addr, size) \
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REGION(timestamp, addr, size, 8)
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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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