From patchwork Mon Apr 20 22:34:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mitchell Horne X-Patchwork-Id: 238138 List-Id: U-Boot discussion From: mhorne at FreeBSD.org (mhorne at FreeBSD.org) Date: Mon, 20 Apr 2020 18:34:17 -0400 Subject: [PATCH 6/7] riscv: add CONFIG_API support In-Reply-To: <20200420223418.117186-1-mhorne@FreeBSD.org> References: <20200420223418.117186-1-mhorne@FreeBSD.org> Message-ID: <20200420223418.117186-7-mhorne@FreeBSD.org> From: Mitchell Horne Add the necessary changes to allow building the CONFIG_API option on the RISC-V architecture. The downstream consumer of this API is the u-boot version of FreeBSD's loader(8). This enables the loader to be ported to RISC-V. Signed-off-by: Mitchell Horne Cc: rick at andestech.com Cc: bmeng.cn at gmail.com Cc: atish.patra at wdc.com --- api/Makefile | 1 + api/api_platform-riscv.c | 33 +++++++++++++++++++++++++++++++++ examples/api/Makefile | 3 +++ examples/api/crt0.S | 15 +++++++++++++++ 4 files changed, 52 insertions(+) create mode 100644 api/api_platform-riscv.c diff --git a/api/Makefile b/api/Makefile index bd2d035fcd..737854e2c6 100644 --- a/api/Makefile +++ b/api/Makefile @@ -6,3 +6,4 @@ obj-y += api.o api_display.o api_net.o api_storage.o obj-$(CONFIG_ARM) += api_platform-arm.o obj-$(CONFIG_PPC) += api_platform-powerpc.o obj-$(CONFIG_MIPS) += api_platform-mips.o +obj-$(CONFIG_RISCV) += api_platform-riscv.o diff --git a/api/api_platform-riscv.c b/api/api_platform-riscv.c new file mode 100644 index 0000000000..33a56535f3 --- /dev/null +++ b/api/api_platform-riscv.c @@ -0,0 +1,33 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2007 Stanislav Galabov + * + * This file contains routines that fetch data from bd_info sources + */ + +#include +#include +#include + +#include +#include + +#include "api_private.h" + +DECLARE_GLOBAL_DATA_PTR; + +/* + * Important notice: handling of individual fields MUST be kept in sync with + * include/asm-generic/u-boot.h, so any changes + * need to reflect their current state and layout of structures involved! + */ +int platform_sys_info(struct sys_info *si) +{ + int i; + + for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) + platform_set_mr(si, gd->bd->bi_dram[i].start, + gd->bd->bi_dram[i].size, MR_ATTR_DRAM); + + return 1; +} diff --git a/examples/api/Makefile b/examples/api/Makefile index 8fa9c04118..0f9d0e013f 100644 --- a/examples/api/Makefile +++ b/examples/api/Makefile @@ -18,6 +18,9 @@ else LOAD_ADDR = 0x80200000 endif endif +ifeq ($(ARCH),riscv) +LOAD_ADDR = 0x84000000 +endif # Resulting ELF and binary exectuables will be named demo and demo.bin extra-y = demo demo.bin diff --git a/examples/api/crt0.S b/examples/api/crt0.S index 658bc59a82..2ba23331df 100644 --- a/examples/api/crt0.S +++ b/examples/api/crt0.S @@ -65,6 +65,21 @@ return_addr: .data .align 8 .long 0 + +#elif defined(CONFIG_RISCV) +#include + .text + .globl _start +_start: + lla t0, search_hint + REG_S sp, 0(t0) + tail main + + .globl syscall +syscall: + lla t0, syscall_ptr + REG_L t2, 0(t0) + jr t2 #else #error No support for this arch! #endif