82d16b150c
This patch changes the memlayout macro infrastructure so that the size of a region "xxx" (i.e. the distance between the symbols _xxx and _exxx) is stored in a separate _xxx_size symbol. This has the advantage that region sizes can be used inside static initializers, and also saves an extra subtraction at runtime. Since linker symbols can only be treated as addresses (not as raw integers) by C, retain the REGION_SIZE() accessor macro to hide the necessary typecast. Signed-off-by: Julius Werner <jwerner@chromium.org> Change-Id: Ifd89708ca9bd3937d0db7308959231106a6aa373 Reviewed-on: https://review.coreboot.org/c/coreboot/+/49332 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
212 lines
6.2 KiB
C
212 lines
6.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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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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#include <vb2_constants.h>
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#include "fmap_config.h"
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/* Macros that the architecture can override. */
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#ifndef ARCH_POINTER_ALIGN_SIZE
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#define ARCH_POINTER_ALIGN_SIZE 8
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#endif
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#ifndef ARCH_CACHELINE_ALIGN_SIZE
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#define ARCH_CACHELINE_ALIGN_SIZE 64
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#endif
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#define STR(x) XSTR(x)
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#define XSTR(x) #x
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#define ALIGN_COUNTER(align) \
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. = ALIGN(align);
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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 = ABSOLUTE(.);
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#define RECORD_SIZE(name) \
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_##name##_size = ABSOLUTE(_e##name - _##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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RECORD_SIZE(name)
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#define ALIAS_REGION(name, alias) \
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_##alias = ABSOLUTE(_##name); \
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_e##alias = ABSOLUTE(_e##name); \
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RECORD_SIZE(alias)
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#define REGION_START(name, addr) SYMBOL(name, addr)
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#define REGION_END(name, addr) \
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SYMBOL(e##name, addr) \
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RECORD_SIZE(name)
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/* Declare according to SRAM/DRAM ranges in SoC hardware-defined address map. */
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#define SRAM_START(addr) REGION_START(sram, addr)
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#define SRAM_END(addr) REGION_END(sram, addr)
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#define DRAM_START(addr) REGION_START(dram, addr)
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#define TIMESTAMP(addr, size) \
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REGION(timestamp, addr, size, 8) \
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_ = ASSERT(size >= 212, "Timestamp region must fit timestamp_cache!");
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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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#define EARLYRAM_STACK(addr, size) \
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REGION(earlyram_stack, addr, size, ARCH_STACK_ALIGN_SIZE)
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/* Use either CBFS_CACHE (unified) or both (PRERAM|POSTRAM)_CBFS_CACHE */
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#define CBFS_CACHE(addr, size) \
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REGION(cbfs_cache, addr, size, 4) \
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ALIAS_REGION(cbfs_cache, preram_cbfs_cache) \
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ALIAS_REGION(cbfs_cache, postram_cbfs_cache)
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#define FMAP_CACHE(addr, sz) \
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REGION(fmap_cache, addr, sz, 4) \
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_ = ASSERT(sz >= FMAP_SIZE, \
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STR(FMAP does not fit in FMAP_CACHE! (sz < FMAP_SIZE)));
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#define CBFS_MCACHE(addr, sz) \
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REGION(cbfs_mcache, addr, sz, 4)
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#if ENV_ROMSTAGE_OR_BEFORE
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#define PRERAM_CBFS_CACHE(addr, size) \
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REGION(preram_cbfs_cache, addr, size, 4) \
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ALIAS_REGION(preram_cbfs_cache, cbfs_cache)
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#define POSTRAM_CBFS_CACHE(addr, size) \
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REGION(postram_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(preram_cbfs_cache, addr, size, 4)
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#define POSTRAM_CBFS_CACHE(addr, size) \
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REGION(postram_cbfs_cache, addr, size, 4) \
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ALIAS_REGION(postram_cbfs_cache, cbfs_cache)
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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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#if ENV_DECOMPRESSOR
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#define DECOMPRESSOR(addr, sz) \
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SYMBOL(decompressor, addr) \
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_edecompressor = ABSOLUTE(_decompressor + sz); \
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RECORD_SIZE(decompressor) \
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_ = ASSERT(_eprogram - _program <= sz, \
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STR(decompressor exceeded its allotted size! (sz))); \
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INCLUDE "decompressor/lib/program.ld"
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#define OVERLAP_DECOMPRESSOR_ROMSTAGE(addr, sz) DECOMPRESSOR(addr, sz)
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#define OVERLAP_DECOMPRESSOR_VERSTAGE_ROMSTAGE(addr, sz) \
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DECOMPRESSOR(addr, sz)
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#else
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#define DECOMPRESSOR(addr, sz) \
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REGION(decompressor, addr, sz, 1)
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#define OVERLAP_DECOMPRESSOR_ROMSTAGE(addr, sz) ROMSTAGE(addr, sz)
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#define OVERLAP_DECOMPRESSOR_VERSTAGE_ROMSTAGE(addr, sz) \
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OVERLAP_VERSTAGE_ROMSTAGE(addr, sz)
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#endif
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#if ENV_BOOTBLOCK
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#define BOOTBLOCK(addr, sz) \
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SYMBOL(bootblock, addr) \
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_ebootblock = ABSOLUTE(_bootblock + sz); \
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RECORD_SIZE(bootblock) \
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_ = ASSERT(_eprogram - _program <= sz, \
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STR(Bootblock exceeded its allotted size! (sz))); \
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INCLUDE "bootblock/lib/program.ld"
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#else
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#define BOOTBLOCK(addr, sz) \
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REGION(bootblock, addr, sz, 1)
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#endif
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#if ENV_ROMSTAGE
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#define ROMSTAGE(addr, sz) \
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SYMBOL(romstage, addr) \
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_eromstage = ABSOLUTE(_romstage + sz); \
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RECORD_SIZE(romstage) \
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_ = ASSERT(_eprogram - _program <= sz, \
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STR(Romstage exceeded its allotted size! (sz))); \
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INCLUDE "romstage/lib/program.ld"
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#else
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#define ROMSTAGE(addr, sz) \
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REGION(romstage, addr, sz, 1)
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#endif
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#if ENV_RAMSTAGE
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#define RAMSTAGE(addr, sz) \
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SYMBOL(ramstage, addr) \
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_eramstage = ABSOLUTE(_ramstage + sz); \
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RECORD_SIZE(ramstage) \
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_ = ASSERT(_eprogram - _program <= sz, \
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STR(Ramstage exceeded its allotted size! (sz))); \
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INCLUDE "ramstage/lib/program.ld"
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#else
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#define RAMSTAGE(addr, sz) \
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REGION(ramstage, addr, sz, 1)
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#endif
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/* VBOOT2_WORK must always use VB2_FIRMWARE_WORKBUF_RECOMMENDED_SIZE for its
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* size argument. The constant is imported via vb2_workbuf_size.h. */
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#define VBOOT2_WORK(addr, sz) \
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REGION(vboot2_work, addr, sz, 16) \
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_ = ASSERT(sz == VB2_FIRMWARE_WORKBUF_RECOMMENDED_SIZE, \
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STR(vboot2 work buffer size must be equivalent to \
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VB2_FIRMWARE_WORKBUF_RECOMMENDED_SIZE! (sz)));
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#define TPM_TCPA_LOG(addr, size) \
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REGION(tpm_tcpa_log, addr, size, 16) \
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_ = ASSERT(size >= 2K, "tpm tcpa log buffer must be at least 2K!");
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#if ENV_SEPARATE_VERSTAGE
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#define VERSTAGE(addr, sz) \
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SYMBOL(verstage, addr) \
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_everstage = ABSOLUTE(_verstage + sz); \
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RECORD_SIZE(verstage) \
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_ = ASSERT(_eprogram - _program <= sz, \
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STR(Verstage exceeded its allotted size! (sz))); \
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INCLUDE "verstage/lib/program.ld"
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#define OVERLAP_VERSTAGE_ROMSTAGE(addr, size) \
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_ = ASSERT(CONFIG(VBOOT_RETURN_FROM_VERSTAGE) == 1, \
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"Must set RETURN_FROM_VERSTAGE to overlap romstage."); \
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VERSTAGE(addr, size)
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#else
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#define VERSTAGE(addr, sz) \
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REGION(verstage, addr, sz, 1)
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#define OVERLAP_VERSTAGE_ROMSTAGE(addr, size) ROMSTAGE(addr, size)
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#endif
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#if ENV_POSTCAR
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#define POSTCAR(addr, sz) \
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SYMBOL(postcar, addr) \
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_epostcar = ABSOLUTE(_postcar + sz); \
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RECORD_SIZE(postcar) \
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_ = ASSERT(_eprogram - _program <= sz, \
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STR(Aftercar exceeded its allotted size! (sz))); \
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INCLUDE "postcar/lib/program.ld"
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#else
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#define POSTCAR(addr, sz) \
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REGION(postcar, addr, sz, 1)
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#endif
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#define WATCHDOG_TOMBSTONE(addr, size) \
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REGION(watchdog_tombstone, addr, size, 4) \
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_ = ASSERT(size == 4, "watchdog tombstones should be exactly 4 byte!");
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#endif /* __MEMLAYOUT_H */
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