From: Tien Fong Chee tien.fong.chee@intel.com
This patch adding the Arria10 FPGA manager program assembly driver which can be used for feeding bitstream to configure FPGA.
Signed-off-by: Tien Fong Chee tien.fong.chee@intel.com Cc: Marek Vasut marex@denx.de Cc: Dinh Nguyen dinguyen@kernel.org Cc: Ching Liang See chin.liang.see@intel.com Cc: Ley Foon ley.foon.tan@intel.com Cc: Westergreen Dalon dalon.westergreen@intel.com --- arch/arm/mach-socfpga/lowlevel_init.S | 48 +++++++++++++++++++++++++++++++++ 1 files changed, 48 insertions(+), 0 deletions(-) create mode 100644 arch/arm/mach-socfpga/lowlevel_init.S
diff --git a/arch/arm/mach-socfpga/lowlevel_init.S b/arch/arm/mach-socfpga/lowlevel_init.S new file mode 100644 index 0000000..79e9d07 --- /dev/null +++ b/arch/arm/mach-socfpga/lowlevel_init.S @@ -0,0 +1,48 @@ +/* + * Copyright (C) 2017 Intel Corporation <www.intel.com> + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include <asm-offsets.h> +#include <config.h> +#include <linux/linkage.h> + +/* + * Write RBF data in burst form to FPGA Manager + * [r0] RBF binary source address + * [r1] FPGA Manager data address + * [r2] RBF data length + */ + +ENTRY(fpgamgr_axi_write) + PUSH {r4-r11, lr} /* save registers per AAPCS */ + +write_burst: + cmp r2,#32 + beq write_burst_cont + bls write_word +write_burst_cont: + ldmia r0!, {r4-r11} + stmia r1, {r4-r11} + subs r2, r2, #32 + b write_burst + +write_word: + cmp r2,#4 + beq write_word_cont + bls write_byte +write_word_cont: + ldmia r0!, {r4} + stmia r1, {r4} + subs r2, r2, #4 + b write_word + +write_byte: + cmp r2,#0 + beq write_end + ldr r3, [r0] + str r3, [r1] +write_end: + POP {r4-r11, pc} +ENDPROC(fpgamgr_axi_write)