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path: root/src/arch/riscv/ramstage.S
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2019-02-13riscv: Add initial support for 32bit boardsPhilipp Hug
* Adding separate targets for 32bit and 64bit qemu * Using the riscv64 toolchain for 32bit builds requires setting -m elf32lriscv * rv32/rv64 is currently configured with ARCH_RISCV_RV32/RV64 and not per stage. This should probably be changed later. TEST=Boots to "Payload not loaded." on 32bit qemu using the following commands: util/riscv/make-spike-elf.sh build/coreboot.rom build/coreboot.elf qemu-system-riscv32 -M virt -m 1024M -nographic -kernel build/coreboot.elf Change-Id: I35e59b459d1770df10b51fe9e77dcc474d7c75a0 Signed-off-by: Philipp Hug <philipp@hug.cx> Reviewed-on: https://review.coreboot.org/c/31253 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: ron minnich <rminnich@gmail.com>
2018-11-05riscv: add support to block smp in each stageXiang Wang
Each stage performs some basic initialization (stack, HLS etc) and then call smp_pause to enter the single-threaded state. The main work of each stage is executed in a single-threaded state, and the multi-threaded state is restored by call smp_resume while booting the next stage. Change-Id: I8d508c3d0f65a022010e74f8edad7ad2cfdc7dee Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/29024 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-by: Philipp Hug <philipp@hug.cx>
2018-10-06arch/riscv: Update comment about mstatus initializationJonathan Neuschäfer
coreboot does not set up virtual memory anymore. Change-Id: I231af07b2988e8362d1cdd606ce889fb31136ff1 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/28831 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Philipp Hug <philipp@hug.cx> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2018-09-05riscv: add entry assembly file for RAMSTAGEXiang Wang
RAMSTAGE will revoke CAR/scratchpad, so stack and exception handling needs to be moved to ddr memory. So add a assembly file to do this. Change-Id: I58aa6ff911f385180bad6e026d3c3eace846e37d Signed-off-by: Xiang Wang <wxjstz@126.com> Reviewed-on: https://review.coreboot.org/28384 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>