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authorLinus Torvalds <torvalds@linux-foundation.org>2026-08-19 10:09:22 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2026-08-19 10:09:22 -0700
commitf4cdf7ca9a1fdcca413157df19753f388a5a224e (patch)
tree60a31895b2446cd7fa27514e8c2843534a0de0da /lib/crc/gen_crc32table.c
downloadlinux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.tar.gz
linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.zip
Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-mediagrafted
Pull media updates from Mauro Carvalho Chehab: - v4l2-core: added ISP statistics support and per-block validation - v4l2-core: Allow unknown HDR10 white point and luminance - New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor - New codec: Milos: VPU v2.0 codec support - isp driver: gained support for Dreamchip RPPX1 ISP framework - vsp1 driver: gained support for RZ/T2H and RZ/N2H - Novalake driver: gained CVS support for new NVL hardware - dvb-core: fix feed leak on failed DMX_ADD_PID - several driver fixes, cleanups and minor improvements * tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits) media: ipu-bridge: check all DMI entries when overriding sensor rotation media: v4l2-async: avoid deleting unlinked ASC entry on link error media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement media: intel/ipu6: fix async notifier cleanup leak on parse error media: staging/ipu7: fix async notifier UAF on probe error path media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem() media: rcar-isp: Fix VSPX reference leaks media: rcar-isp: Release ISPCORE resources media: i2c: imx415: Release runtime PM reference on VBLANK error media: i2c: imx415: Return test pattern write errors media: renesas: vsp1: Declare index variables in for loop statement media: renesas: vsp1: Make reset control optional to support platforms without a reset line media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs media: nxp: imx8-isi: Add additional 32-bit RGB format support media: nxp: imx8-isi: Add 16-bit raw Bayer format support media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks media: nxp: imx8-isi: Correct color map between V4L2 and ISI ...
Diffstat (limited to 'lib/crc/gen_crc32table.c')
-rw-r--r--lib/crc/gen_crc32table.c89
1 files changed, 89 insertions, 0 deletions
diff --git a/lib/crc/gen_crc32table.c b/lib/crc/gen_crc32table.c
new file mode 100644
index 000000000..9a7f31658
--- /dev/null
+++ b/lib/crc/gen_crc32table.c
@@ -0,0 +1,89 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include "../../include/linux/crc32poly.h"
+#include "../../include/generated/autoconf.h"
+#include <inttypes.h>
+
+static uint32_t crc32table_le[256];
+static uint32_t crc32table_be[256];
+static uint32_t crc32ctable_le[256];
+
+/**
+ * crc32init_le() - allocate and initialize LE table data
+ *
+ * crc is the crc of the byte i; other entries are filled in based on the
+ * fact that crctable[i^j] = crctable[i] ^ crctable[j].
+ *
+ */
+static void crc32init_le_generic(const uint32_t polynomial, uint32_t tab[256])
+{
+ unsigned i, j;
+ uint32_t crc = 1;
+
+ tab[0] = 0;
+
+ for (i = 128; i; i >>= 1) {
+ crc = (crc >> 1) ^ ((crc & 1) ? polynomial : 0);
+ for (j = 0; j < 256; j += 2 * i)
+ tab[i + j] = crc ^ tab[j];
+ }
+}
+
+static void crc32init_le(void)
+{
+ crc32init_le_generic(CRC32_POLY_LE, crc32table_le);
+}
+
+static void crc32cinit_le(void)
+{
+ crc32init_le_generic(CRC32C_POLY_LE, crc32ctable_le);
+}
+
+/**
+ * crc32init_be() - allocate and initialize BE table data
+ */
+static void crc32init_be(void)
+{
+ unsigned i, j;
+ uint32_t crc = 0x80000000;
+
+ crc32table_be[0] = 0;
+
+ for (i = 1; i < 256; i <<= 1) {
+ crc = (crc << 1) ^ ((crc & 0x80000000) ? CRC32_POLY_BE : 0);
+ for (j = 0; j < i; j++)
+ crc32table_be[i + j] = crc ^ crc32table_be[j];
+ }
+}
+
+static void output_table(const uint32_t table[256])
+{
+ int i;
+
+ for (i = 0; i < 256; i += 4) {
+ printf("\t0x%08x, 0x%08x, 0x%08x, 0x%08x,\n",
+ table[i], table[i + 1], table[i + 2], table[i + 3]);
+ }
+}
+
+int main(int argc, char** argv)
+{
+ printf("/* this file is generated - do not edit */\n\n");
+
+ crc32init_le();
+ printf("static const u32 ____cacheline_aligned crc32table_le[256] = {\n");
+ output_table(crc32table_le);
+ printf("};\n");
+
+ crc32init_be();
+ printf("static const u32 ____cacheline_aligned crc32table_be[256] = {\n");
+ output_table(crc32table_be);
+ printf("};\n");
+
+ crc32cinit_le();
+ printf("static const u32 ____cacheline_aligned crc32ctable_le[256] = {\n");
+ output_table(crc32ctable_le);
+ printf("};\n");
+
+ return 0;
+}