--- /dev/null
+/*
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 RehiveTech. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of RehiveTech nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RTE_CPUFLAGS_ARM_H_
+#define _RTE_CPUFLAGS_ARM_H_
+
+#include <rte_cpuflags_32.h>
+
+#endif /* _RTE_CPUFLAGS_ARM_H_ */
--- /dev/null
+/*
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 RehiveTech. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of RehiveTech nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RTE_CPUFLAGS_ARM32_H_
+#define _RTE_CPUFLAGS_ARM32_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <elf.h>
+#include <fcntl.h>
+#include <assert.h>
+#include <unistd.h>
+
+#include "generic/rte_cpuflags.h"
+
+#ifndef AT_HWCAP
+#define AT_HWCAP 16
+#endif
+
+#ifndef AT_HWCAP2
+#define AT_HWCAP2 26
+#endif
+
+/* software based registers */
+enum cpu_register_t {
+ REG_HWCAP = 0,
+ REG_HWCAP2,
+};
+
+/**
+ * Enumeration of all CPU features supported
+ */
+enum rte_cpu_flag_t {
+ RTE_CPUFLAG_SWP = 0,
+ RTE_CPUFLAG_HALF,
+ RTE_CPUFLAG_THUMB,
+ RTE_CPUFLAG_A26BIT,
+ RTE_CPUFLAG_FAST_MULT,
+ RTE_CPUFLAG_FPA,
+ RTE_CPUFLAG_VFP,
+ RTE_CPUFLAG_EDSP,
+ RTE_CPUFLAG_JAVA,
+ RTE_CPUFLAG_IWMMXT,
+ RTE_CPUFLAG_CRUNCH,
+ RTE_CPUFLAG_THUMBEE,
+ RTE_CPUFLAG_NEON,
+ RTE_CPUFLAG_VFPv3,
+ RTE_CPUFLAG_VFPv3D16,
+ RTE_CPUFLAG_TLS,
+ RTE_CPUFLAG_VFPv4,
+ RTE_CPUFLAG_IDIVA,
+ RTE_CPUFLAG_IDIVT,
+ RTE_CPUFLAG_VFPD32,
+ RTE_CPUFLAG_LPAE,
+ RTE_CPUFLAG_EVTSTRM,
+ RTE_CPUFLAG_AES,
+ RTE_CPUFLAG_PMULL,
+ RTE_CPUFLAG_SHA1,
+ RTE_CPUFLAG_SHA2,
+ RTE_CPUFLAG_CRC32,
+ /* The last item */
+ RTE_CPUFLAG_NUMFLAGS,/**< This should always be the last! */
+};
+
+static const struct feature_entry cpu_feature_table[] = {
+ FEAT_DEF(SWP, 0x00000001, 0, REG_HWCAP, 0)
+ FEAT_DEF(HALF, 0x00000001, 0, REG_HWCAP, 1)
+ FEAT_DEF(THUMB, 0x00000001, 0, REG_HWCAP, 2)
+ FEAT_DEF(A26BIT, 0x00000001, 0, REG_HWCAP, 3)
+ FEAT_DEF(FAST_MULT, 0x00000001, 0, REG_HWCAP, 4)
+ FEAT_DEF(FPA, 0x00000001, 0, REG_HWCAP, 5)
+ FEAT_DEF(VFP, 0x00000001, 0, REG_HWCAP, 6)
+ FEAT_DEF(EDSP, 0x00000001, 0, REG_HWCAP, 7)
+ FEAT_DEF(JAVA, 0x00000001, 0, REG_HWCAP, 8)
+ FEAT_DEF(IWMMXT, 0x00000001, 0, REG_HWCAP, 9)
+ FEAT_DEF(CRUNCH, 0x00000001, 0, REG_HWCAP, 10)
+ FEAT_DEF(THUMBEE, 0x00000001, 0, REG_HWCAP, 11)
+ FEAT_DEF(NEON, 0x00000001, 0, REG_HWCAP, 12)
+ FEAT_DEF(VFPv3, 0x00000001, 0, REG_HWCAP, 13)
+ FEAT_DEF(VFPv3D16, 0x00000001, 0, REG_HWCAP, 14)
+ FEAT_DEF(TLS, 0x00000001, 0, REG_HWCAP, 15)
+ FEAT_DEF(VFPv4, 0x00000001, 0, REG_HWCAP, 16)
+ FEAT_DEF(IDIVA, 0x00000001, 0, REG_HWCAP, 17)
+ FEAT_DEF(IDIVT, 0x00000001, 0, REG_HWCAP, 18)
+ FEAT_DEF(VFPD32, 0x00000001, 0, REG_HWCAP, 19)
+ FEAT_DEF(LPAE, 0x00000001, 0, REG_HWCAP, 20)
+ FEAT_DEF(EVTSTRM, 0x00000001, 0, REG_HWCAP, 21)
+ FEAT_DEF(AES, 0x00000001, 0, REG_HWCAP2, 0)
+ FEAT_DEF(PMULL, 0x00000001, 0, REG_HWCAP2, 1)
+ FEAT_DEF(SHA1, 0x00000001, 0, REG_HWCAP2, 2)
+ FEAT_DEF(SHA2, 0x00000001, 0, REG_HWCAP2, 3)
+ FEAT_DEF(CRC32, 0x00000001, 0, REG_HWCAP2, 4)
+};
+
+/*
+ * Read AUXV software register and get cpu features for ARM
+ */
+static inline void
+rte_cpu_get_features(__attribute__((unused)) uint32_t leaf,
+ __attribute__((unused)) uint32_t subleaf, cpuid_registers_t out)
+{
+ int auxv_fd;
+ Elf32_auxv_t auxv;
+
+ auxv_fd = open("/proc/self/auxv", O_RDONLY);
+ assert(auxv_fd);
+ while (read(auxv_fd, &auxv,
+ sizeof(Elf32_auxv_t)) == sizeof(Elf32_auxv_t)) {
+ if (auxv.a_type == AT_HWCAP)
+ out[REG_HWCAP] = auxv.a_un.a_val;
+ else if (auxv.a_type == AT_HWCAP2)
+ out[REG_HWCAP2] = auxv.a_un.a_val;
+ }
+}
+
+/*
+ * Checks if a particular flag is available on current machine.
+ */
+static inline int
+rte_cpu_get_flag_enabled(enum rte_cpu_flag_t feature)
+{
+ const struct feature_entry *feat;
+ cpuid_registers_t regs = {0};
+
+ if (feature >= RTE_CPUFLAG_NUMFLAGS)
+ /* Flag does not match anything in the feature tables */
+ return -ENOENT;
+
+ feat = &cpu_feature_table[feature];
+
+ if (!feat->leaf)
+ /* This entry in the table wasn't filled out! */
+ return -EFAULT;
+
+ /* get the cpuid leaf containing the desired feature */
+ rte_cpu_get_features(feat->leaf, feat->subleaf, regs);
+
+ /* check if the feature is enabled */
+ return (regs[feat->reg] >> feat->bit) & 1;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTE_CPUFLAGS_ARM32_H_ */
git.droids-corp.org / dpdk.git / commitdiff