mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 17:08:52 +09:00
c4db335c2e
Since the Blackfin ABI favors higher scratch registers by default, use the last scratch register (P3) for global data rather than the first (P5). This allows the compiler's register allocator to use higher number scratch P registers, which in turn better matches the Blackfin instruction set, which reduces the size of U-Boot by more than 1024 bytes... Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
67 lines
2.1 KiB
Makefile
67 lines
2.1 KiB
Makefile
#
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# (C) Copyright 2000-2002
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# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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#
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# See file CREDITS for list of people who contributed to this
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# project.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 2 of
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# the License, or (at your option) any later version.
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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., 59 Temple Place, Suite 330, Boston,
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# MA 02111-1307 USA
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#
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CROSS_COMPILE ?= bfin-uclinux-
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CONFIG_BFIN_CPU := $(strip $(subst ",,$(CONFIG_BFIN_CPU)))
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CONFIG_BFIN_BOOT_MODE := $(strip $(subst ",,$(CONFIG_BFIN_BOOT_MODE)))
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CONFIG_ENV_OFFSET := $(strip $(subst ",,$(CONFIG_ENV_OFFSET)))
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CONFIG_ENV_SIZE := $(strip $(subst ",,$(CONFIG_ENV_SIZE)))
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PLATFORM_RELFLAGS += -ffixed-P3 -fomit-frame-pointer -mno-fdpic
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PLATFORM_CPPFLAGS += -DCONFIG_BLACKFIN
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LDFLAGS += --gc-sections
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PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections
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ifneq (,$(CONFIG_BFIN_CPU))
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PLATFORM_RELFLAGS += -mcpu=$(CONFIG_BFIN_CPU)
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endif
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ifneq ($(CONFIG_BFIN_BOOT_MODE),BFIN_BOOT_BYPASS)
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ALL += $(obj)u-boot.ldr
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endif
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SYM_PREFIX = _
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LDR_FLAGS-y :=
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LDR_FLAGS-$(CONFIG_BFIN_BOOTROM_USES_EVT1) += -J
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LDR_FLAGS += --bmode $(subst BFIN_BOOT_,,$(CONFIG_BFIN_BOOT_MODE))
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LDR_FLAGS += --use-vmas
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LDR_FLAGS += --initcode $(obj)cpu/$(CPU)/initcode.o
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ifneq ($(CONFIG_BFIN_BOOT_MODE),BFIN_BOOT_UART)
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ifneq ($(ENV_IS_EMBEDDED_CUSTOM),ENV_IS_EMBEDDED_CUSTOM)
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LDR_FLAGS += --punchit $$(($(CONFIG_ENV_OFFSET))):$$(($(CONFIG_ENV_SIZE))):$(obj)env-ldr.o
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endif
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endif
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ifneq (,$(findstring s,$(MAKEFLAGS)))
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LDR_FLAGS += --quiet
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endif
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LDR_FLAGS += $(LDR_FLAGS-y)
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ifeq ($(wildcard $(TOPDIR)/board/$(BOARD)/u-boot.lds*),)
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LDSCRIPT = $(obj)lib_$(ARCH)/u-boot.lds.S
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endif
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