On 05/05/2017 12:26 PM, tien.fong.c...@intel.com wrote:
> From: Tien Fong Chee <tien.fong.c...@intel.com>
>
> Adding the Arria10 FPGA manager program assembly driver which can be used
> to feed bitstream into FPGA manager for configuring FPGA.
>
> Signed-off-by: Tien Fong Chee <tien.fong.c...@intel.com>
> ---
> arch/arm/mach-socfpga/Makefile | 1 +
> arch/arm/mach-socfpga/lowlevel_init.S | 48
> +++++++++++++++++++++++++++++++++
> 2 files changed, 49 insertions(+), 0 deletions(-)
> create mode 100644 arch/arm/mach-socfpga/lowlevel_init.S
>
> diff --git a/arch/arm/mach-socfpga/Makefile b/arch/arm/mach-socfpga/Makefile
> index 824cd8e..8b86dc7 100644
> --- a/arch/arm/mach-socfpga/Makefile
> +++ b/arch/arm/mach-socfpga/Makefile
> @@ -24,6 +24,7 @@ endif
>
> ifdef CONFIG_TARGET_SOCFPGA_ARRIA10
> obj-y += clock_manager_arria10.o
> +obj-y += lowlevel_init.o
> obj-y += misc_arria10.o
> obj-y += pinmux_arria10.o
> obj-y += reset_manager_arria10.o
> 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
> + */
We do the same for Gen5 in C code with a bit of assembly, so do the same.
> +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)
>
--
Best regards,
Marek Vasut
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