diff options
Diffstat (limited to 'meta-xilinx/meta-xilinx-bsp/recipes-devtools/qemu/files/flash_stripe.c')
| -rw-r--r-- | meta-xilinx/meta-xilinx-bsp/recipes-devtools/qemu/files/flash_stripe.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/meta-xilinx/meta-xilinx-bsp/recipes-devtools/qemu/files/flash_stripe.c b/meta-xilinx/meta-xilinx-bsp/recipes-devtools/qemu/files/flash_stripe.c new file mode 100644 index 000000000..a9a6e76a5 --- /dev/null +++ b/meta-xilinx/meta-xilinx-bsp/recipes-devtools/qemu/files/flash_stripe.c @@ -0,0 +1,176 @@ +/* + * Stripe a flash image across multiple files. + * + * Copyright (C) 2019 Xilinx, Inc. All rights reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <stdint.h> +#include <stdbool.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <string.h> + +/* N way (num) in place bit striper. Lay out row wise bits column wise + * (from element 0 to N-1). num is the length of x, and dir reverses the + * direction of the transform. be determines the bit endianess scheme. + * false to lay out bits LSB to MSB (little endian) and true for big endian. + * + * Best illustrated by examples: + * Each digit in the below array is a single bit (num == 3, be == false): + * + * {{ 76543210, } ----- stripe (dir == false) -----> {{ FCheb630, } + * { hgfedcba, } { GDAfc741, } + * { HGFEDCBA, }} <---- upstripe (dir == true) ----- { HEBgda52, }} + * + * Same but with be == true: + * + * {{ 76543210, } ----- stripe (dir == false) -----> {{ 741gdaFC, } + * { hgfedcba, } { 630fcHEB, } + * { HGFEDCBA, }} <---- upstripe (dir == true) ----- { 52hebGDA, }} + */ + +static inline void stripe8(uint8_t *x, int num, bool dir, bool be) +{ + uint8_t r[num]; + memset(r, 0, sizeof(uint8_t) * num); + int idx[2] = {0, 0}; + int bit[2] = {0, be ? 7 : 0}; + int d = dir; + + for (idx[0] = 0; idx[0] < num; ++idx[0]) { + for (bit[0] = be ? 7 : 0; bit[0] != (be ? -1 : 8); bit[0] += be ? -1 : 1) { + r[idx[!d]] |= x[idx[d]] & 1 << bit[d] ? 1 << bit[!d] : 0; + idx[1] = (idx[1] + 1) % num; + if (!idx[1]) { + bit[1] += be ? -1 : 1; + } + } + } + memcpy(x, r, sizeof(uint8_t) * num); +} + +int main (int argc, char *argv []) { +#ifdef UNSTRIPE + bool unstripe = true; +#else + bool unstripe = false; +#endif + +#ifdef FLASH_STRIPE_BE + bool be = true; +#else + bool be = false; +#endif + + int i; + + const char *exe_name = argv[0]; + argc--; + argv++; + + if (argc < 2) { + fprintf(stderr, "ERROR: %s requires at least two args\n", exe_name); + return 1; + } + + const char *single_f = argv[0]; + int single; + + if (unstripe) { + single = creat(single_f, 0644); + } else { + single = open(single_f, 0); + } + if (single == -1) { + perror(argv[0]); + return 1; + } + + argv++; + argc--; + + int multiple[argc]; + + for (i = 0; i < argc; ++i) { + if (unstripe) { + multiple[i] = open(argv[i], 0); + } else { + multiple[i] = creat(argv[i], 0644); + } + if (multiple[i] == -1) { + perror(argv[i]); + return 1; + } + } + + while (true) { + uint8_t buf[argc]; + for (i = 0; i < argc; ++i) { + switch (read(!unstripe ? single : multiple[ +#if defined(FLASH_STRIPE_BW) && defined (FLASH_STRIPE_BE) + argc - 1 - +#endif + i], &buf[i], 1)) { + case 0: + if (i == 0) { + goto done; + } else if (!unstripe) { + fprintf(stderr, "WARNING:input file %s is not multiple of " + "%d bytes, padding with garbage byte\n", single_f, + argc); + } + break; + case -1: + perror(unstripe ? argv[i] : single_f); + return 1; + } + } + +#ifndef FLASH_STRIPE_BW + stripe8(buf, argc, unstripe, be); +#endif + + for (i = 0; i < argc; ++i) { + switch (write(unstripe ? single : multiple[ +#if defined(FLASH_STRIPE_BW) && defined (FLASH_STRIPE_BE) + argc - 1 - +#endif + i], &buf[i], 1)) { + case -1: + perror(unstripe ? single_f : argv[i]); + return 1; + case 0: + i--; /* try again */ + } + } + } + +done: + close(single); + for (i = 0; i < argc; ++i) { + close(multiple[argc]); + } + return 0; +} |