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arm: socfpga: Enhance FPGA program write rbf data with size >= 4 bytes

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Existing FPGA program write is always assume RBF data >= 32 bytes, so
any rbf data less than 32 bytes writing to FPGA would be failed.
This patch enhances the FPGA program write to support rbf data with
size >= 4 bytes.

Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>
This commit is contained in:
Tien Fong Chee 2017-09-25 16:40:01 +08:00 committed by Marek Vasut
parent 772f8765d7
commit bd08ce8f5e
1 changed files with 8 additions and 6 deletions
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14
drivers/fpga/socfpga.c
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@ -1,5 +1,5 @@
/*
* Copyright (C) 2012 Altera Corporation <www.altera.com>
* Copyright (C) 2012-2017 Altera Corporation <www.altera.com>
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
@ -55,18 +55,20 @@ void fpgamgr_program_write(const void *rbf_data, size_t rbf_size)
uint32_t loops4 = DIV_ROUND_UP(rbf_size % 32, 4);
asm volatile(
" cmp %2, #0\n"
" beq 2f\n"
"1: ldmia %0!, {r0-r7}\n"
" stmia %1!, {r0-r7}\n"
" sub %1, #32\n"
" subs %2, #1\n"
" bne 1b\n"
" cmp %3, #0\n"
" beq 3f\n"
"2: ldr %2, [%0], #4\n"
"2: cmp %3, #0\n"
" beq 4f\n"
"3: ldr %2, [%0], #4\n"
" str %2, [%1]\n"
" subs %3, #1\n"
" bne 2b\n"
"3: nop\n"
" bne 3b\n"
"4: nop\n"
: "+r"(src), "+r"(dst), "+r"(loops32), "+r"(loops4) :
: "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "cc");
}