diff options
| author | Anup Patel <anup.patel@wdc.com> | 2019-02-08 12:47:01 +0530 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2019-02-12 15:55:15 +0530 |
| commit | c5467fce469f0a5da868f1c9f90f9e4e549cb660 (patch) | |
| tree | 12c4f51bc71fa844d55bfda460ea0692094337ef /platform/template | |
| parent | 84169e2e691183594d0ba3b2acd85024c65b7370 (diff) | |
Makefile: Set ABI, ISA and Code Model in top-level make
This patch introduces following optional PLATFORM options:
PLATFORM_RISCV_XLEN -> RISC-V register width
PLATFORM_RISCV_ABI -> RISC-V GCC ABI
PLATFORM_RISCV_ISA -> RISC-V GCC ISA string
PLATFORM_RISCV_CODE_MODEL -> RISC-V GCC Code Model
If the above options are not provided by platform config.mk
or by command-line parameters then:
1. PLATFORM_RISCV_XLEN will be determined using toolchain
capability
2. PLATFORM_RISCV_ABI, PLATFORM_RISCV_ISA, and
PLATFORM_RISCV_CODE_MODEL is set to value best suited for
generic libsbi.a
As a result of these optional PLATFORM options, the
platform-cflags-y and platform-asflags-y is further
simplified for platform config.mk.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Diffstat (limited to 'platform/template')
| -rw-r--r-- | platform/template/config.mk | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/platform/template/config.mk b/platform/template/config.mk index 3c85af7..65ea135 100644 --- a/platform/template/config.mk +++ b/platform/template/config.mk @@ -8,20 +8,24 @@ platform-cppflags-y = # C Compiler and assembler flags. -# For a 64 bits platform, this will likely be: -# -mabi=lp64 -march=rv64imafdc -mcmodel=medany -# For a 32 bits platform, this will likely be: -# -mabi=lp32 -march=rv32imafdc -mcmodel=medlow -# You can also use the Makefile variable OPENSBI_CC_XLEN for the xlen -# See the QEMU virt machine for an example of this -platform-cflags-y = -mabi=lp64 -march=rv64imafdc -mcmodel=medany -platform-asflags-y = -mabi=lp64 -march=rv64imafdc -mcmodel=medany +platform-cflags-y = +platform-asflags-y = # Linker flags: additional libraries and object files that the platform # code needs can be added here platform-ldflags-y = # +# Platform RISC-V XLEN, ABI, ISA and Code Model configuration. +# These are optional parameters but platforms can optionaly provide it. +# Some of these are guessed based on GCC compiler capabilities +# +# PLATFORM_RISCV_XLEN = 64 +# PLATFORM_RISCV_ABI = lp64 +# PLATFORM_RISCV_ISA = rv64imafdc +# PLATFORM_RISCV_CODE_MODEL = medany + +# # OpenSBI implements generic drivers for some common generic hardware. The # drivers currently available are the RISC-V Platform Level Interrupt # Controller (PLIC), RISC-V Core Local Interrupt controller (CLINT) and a UART |