On Jum, 2017-05-05 at 13:14 +0200, Marek Vasut wrote:
On 05/05/2017 12:26 PM, tien.fong.chee@intel.com wrote:
From: Tien Fong Chee tien.fong.chee@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.chee@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.
Okay, i just saw it, thanks for pointing out.
+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)