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https://github.com/ARM-software/arm-trusted-firmware.git
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fa1fdb223c
BL31 binary size is aligned to 4KB because of the
code in include\plat\arm\common\arm_reclaim_init.ld.S:
__INIT_CODE_UNALIGNED__ = .;
. = ALIGN(PAGE_SIZE);
__INIT_CODE_END__ = .;
with all the zero data after the last instruction of
BL31 code to the end of the page.
This causes increase in size of BL31 binary stored in FIP
and its loading time by BL2.
This patch reduces the size of BL31 image by moving
page alignment from __INIT_CODE_END__ to __STACKS_END__
which also increases the stack size for secondary CPUs.
Change-Id: Ie2ec503fc774c22c12ec506d74fd3ef2b0b183a9
Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>
68 lines
1.8 KiB
ArmAsm
68 lines
1.8 KiB
ArmAsm
/*
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* Copyright (c) 2017-2020, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef ARM_RECLAIM_INIT_LD_S
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#define ARM_RECLAIM_INIT_LD_S
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SECTIONS
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{
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.init __STACKS_START__ : {
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. = . + PLATFORM_STACK_SIZE;
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. = ALIGN(PAGE_SIZE);
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__INIT_CODE_START__ = .;
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*(*text.init*);
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__INIT_CODE_END__ = .;
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} >RAM
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#ifdef BL31_PROGBITS_LIMIT
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ASSERT(__INIT_CODE_END__ <= BL31_PROGBITS_LIMIT,
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"BL31 init has exceeded progbits limit.")
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#endif
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ASSERT(__INIT_CODE_END__ <= __STACKS_END__,
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"Init code ends past the end of the stacks")
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}
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#undef MIN
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#define ABS ABSOLUTE
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#define COUNT PLATFORM_CORE_COUNT
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#define ALIGN_MASK ~(CACHE_WRITEBACK_GRANULE - 1)
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#define PRIMARY_STACK \
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__STACKS_START__ = .; \
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*(tzfw_normal_stacks) \
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OFFSET = ABS(SIZEOF(.init) - (. - __STACKS_START__)); \
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/* Offset sign */ \
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SIGN = ABS(OFFSET) & (1 << 63); \
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/* Offset mask */ \
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MASK = ABS(SIGN >> 63) - 1; \
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. += ABS(OFFSET) & ABS(MASK); \
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. = ALIGN(PAGE_SIZE); \
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__STACKS_END__ = .; \
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/* Total stack size */ \
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SIZE = ABS(. - __STACKS_START__); \
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/* Maximum primary CPU stack */ \
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STACK = ABS(__STACKS_START__ + SIZE / COUNT) & ALIGN_MASK; \
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/* Primary CPU stack */ \
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__PRIMARY_STACK__ = MIN(STACK, ABS(__INIT_CODE_START__));
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#if (COUNT > 1)
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#define SECONDARY_STACK \
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/* Size of the secondary CPUs' stack */ \
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REST = ABS(__STACKS_END__ - __PRIMARY_STACK__); \
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/* Secondary per-CPU stack size */ \
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__STACK_SIZE__ = ABS(REST / (COUNT - 1));
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#else
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#define SECONDARY_STACK
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#endif
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#define STACK_SECTION \
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stacks (NOLOAD) : { \
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PRIMARY_STACK \
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SECONDARY_STACK \
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}
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#endif /* ARM_RECLAIM_INIT_LD_S */
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