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[147.11.156.139]) by smtp.gmail.com with ESMTPSA id f6sm5206070pfg.188.2018.12.07.06.09.32 (version=TLS1_1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 07 Dec 2018 06:09:32 -0800 (PST) From: Bin Meng To: Rick Chen , Simon Glass , Lukas Auer , Anup Patel , U-Boot Mailing List Date: Fri, 7 Dec 2018 06:14:13 -0800 Message-Id: <1544192072-28764-2-git-send-email-bmeng.cn@gmail.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1544192072-28764-1-git-send-email-bmeng.cn@gmail.com> References: <1544192072-28764-1-git-send-email-bmeng.cn@gmail.com> Subject: [U-Boot] [PATCH v2 01/20] riscv: add Kconfig entries for the code model X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.18 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" From: Lukas Auer RISC-V has two code models, medium low (medlow) and medium any (medany). Medlow limits addressable memory to a single 2 GiB range between the absolute addresses -2 GiB and +2 GiB. Medany limits addressable memory to any single 2 GiB address range. By default, medlow is selected for U-Boot on both 32-bit and 64-bit systems. The -mcmodel compiler flag is selected according to the Kconfig configuration. Signed-off-by: Lukas Auer [bmeng: adjust to make medlow the default code model for U-Boot] Signed-off-by: Bin Meng --- Changes in v2: None arch/riscv/Kconfig | 18 ++++++++++++++++++ arch/riscv/Makefile | 9 ++++++++- 2 files changed, 26 insertions(+), 1 deletion(-) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 732a357..6d85ac9 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -44,6 +44,24 @@ config ARCH_RV64I endchoice +choice + prompt "Code Model" + default CMODEL_MEDLOW + +config CMODEL_MEDLOW + bool "medium low code model" + help + U-Boot and its statically defined symbols must lie within a single 2 GiB + address range and must lie between absolute addresses -2 GiB and +2 GiB. + +config CMODEL_MEDANY + bool "medium any code model" + help + U-Boot and its statically defined symbols must be within any single 2 GiB + address range. + +endchoice + config RISCV_ISA_C bool "Emit compressed instructions" default y diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile index 55d7c65..0b80eb8 100644 --- a/arch/riscv/Makefile +++ b/arch/riscv/Makefile @@ -17,8 +17,15 @@ endif ifeq ($(CONFIG_RISCV_ISA_C),y) ARCH_C = c endif +ifeq ($(CONFIG_CMODEL_MEDLOW),y) + CMODEL = medlow +endif +ifeq ($(CONFIG_CMODEL_MEDANY),y) + CMODEL = medany +endif -ARCH_FLAGS = -march=$(ARCH_BASE)$(ARCH_A)$(ARCH_C) -mabi=$(ABI) +ARCH_FLAGS = -march=$(ARCH_BASE)$(ARCH_A)$(ARCH_C) -mabi=$(ABI) \ + -mcmodel=$(CMODEL) PLATFORM_CPPFLAGS += $(ARCH_FLAGS) CFLAGS_EFI += $(ARCH_FLAGS)