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userspace-rcu/add-e2k-support.patch
Ilfat G 3ec6e16ca8 Update e2k patch
2022-04-14 18:01:17 +00:00

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diff --git a/include/Makefile.am b/include/Makefile.am
index 3f92cc3..68e9790 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -2,6 +2,7 @@ nobase_include_HEADERS = \
urcu/arch/aarch64.h \
urcu/arch/alpha.h \
urcu/arch/arm.h \
+ urcu/arch/e2k.h \
urcu/arch/gcc.h \
urcu/arch/generic.h \
urcu/arch.h \
@@ -62,6 +63,7 @@ nobase_include_HEADERS = \
urcu/uatomic/alpha.h \
urcu/uatomic_arch.h \
urcu/uatomic/arm.h \
+ urcu/uatomic/e2k.h \
urcu/uatomic/gcc.h \
urcu/uatomic/generic.h \
urcu/uatomic.h \
diff --git a/include/urcu/arch.h b/include/urcu/arch.h
index 620743c..6f809c7 100644
--- a/include/urcu/arch.h
+++ b/include/urcu/arch.h
@@ -64,6 +64,11 @@
#define URCU_ARCH_AMD64 1
#include <urcu/arch/x86.h>
+#elif defined(__e2k__)
+
+#define URCU_ARCH_E2K 1
+#include <urcu/arch/e2k.h>
+
#elif (defined(__i486__) || defined(__i586__) || defined(__i686__))
#define URCU_ARCH_X86 1
diff --git a/include/urcu/arch/e2k.h b/include/urcu/arch/e2k.h
new file mode 100644
index 0000000..b4d80ca
--- /dev/null
+++ b/include/urcu/arch/e2k.h
@@ -0,0 +1,86 @@
+#ifndef _URCU_ARCH_E2K_H
+#define _URCU_ARCH_E2K_H
+
+/*
+ * arch_e2k.h: trivial definitions for the e2k architecture.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <urcu/compiler.h>
+#include <urcu/config.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define E2K_GET_DSREG(reg_mnemonic) \
+({ \
+ unsigned long long __res; \
+ asm volatile ("rrd %%" #reg_mnemonic ", %0" : "=r" (__res)); \
+ __res; \
+})
+
+#define _ld_c 0x8 /* stop until all load operations complete */
+#define _st_c 0x4 /* stop until store operations complete */
+#define E2K_WAIT(num) \
+({ \
+ asm volatile ("{wait \tma_c = %0, fl_c = %1, ld_c = %2, " \
+ "st_c = %3, all_e = %4, all_c = %5}" \
+ : \
+ : "i" (((num) & 0x20) >> 5), \
+ "i" (((num) & 0x10) >> 4), \
+ "i" (((num) & 0x8) >> 3), \
+ "i" (((num) & 0x4) >> 2), \
+ "i" (((num) & 0x2) >> 1), \
+ "i" (((num) & 0x1)) \
+ : "memory" ); \
+})
+
+#define barrier() __asm__ __volatile__("{nop}" ::: "memory")
+
+#define caa_cpu_relax() __asm__ __volatile__("{nop 7}" ::: "memory")
+
+
+#define cmm_mb() E2K_WAIT(_st_c|_ld_c)
+#define cmm_wmb() E2K_WAIT(_st_c)
+#define cmm_rmb() E2K_WAIT(_ld_c)
+
+#ifdef CONFIG_RCU_SMP
+#define cmm_smp_mb() cmm_mb()
+#define cmm_smp_rmb() cmm_rmb()
+#define cmm_smp_wmb() cmm_wmb()
+#else
+#define cmm_smp_mb() barrier()
+#define cmm_smp_rmb() barrier()
+#define cmm_smp_wmb() barrier()
+#endif
+
+#define cmm_read_barrier_depends() do { } while (0)
+
+#define HAS_CAA_GET_CYCLES
+typedef unsigned long long caa_cycles_t;
+static inline caa_cycles_t caa_get_cycles(void)
+{
+ return E2K_GET_DSREG(clkr);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#include <urcu/arch/generic.h>
+
+#endif /* _URCU_ARCH_E2K_H */
diff --git a/include/urcu/compiler.h b/include/urcu/compiler.h
index 34eb564..9974dfd 100644
--- a/include/urcu/compiler.h
+++ b/include/urcu/compiler.h
@@ -24,7 +24,11 @@
#define caa_likely(x) __builtin_expect(!!(x), 1)
#define caa_unlikely(x) __builtin_expect(!!(x), 0)
+#ifdef __e2k__
+#define cmm_barrier() __asm__ __volatile__ ("{nop}" ::: "memory")
+#else
#define cmm_barrier() __asm__ __volatile__ ("" : : : "memory")
+#endif
/*
* Instruct the compiler to perform only a single access to a variable
diff --git a/include/urcu/uatomic.h b/include/urcu/uatomic.h
index 2fb5fd4..4497e40 100644
--- a/include/urcu/uatomic.h
+++ b/include/urcu/uatomic.h
@@ -25,6 +25,8 @@
#if defined(URCU_ARCH_X86)
#include <urcu/uatomic/x86.h>
+#elif defined(URCU_ARCH_E2K)
+#include <urcu/uatomic/e2k.h>
#elif defined(URCU_ARCH_PPC)
#include <urcu/uatomic/ppc.h>
#elif defined(URCU_ARCH_S390)
diff --git a/include/urcu/uatomic/e2k.h b/include/urcu/uatomic/e2k.h
new file mode 100644
index 0000000..4792268
--- /dev/null
+++ b/include/urcu/uatomic/e2k.h
@@ -0,0 +1,31 @@
+ #ifndef _URCU_UATOMIC_ARCH_E2K_H
+#define _URCU_UATOMIC_ARCH_E2K_H
+
+/*
+ * Atomic exchange operations for the e2k architecture. Let GCC do it.
+ *
+ * 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 <urcu/compiler.h>
+#include <urcu/system.h>
+#include <urcu/uatomic/generic.h>
+
+#endif /* _URCU_UATOMIC_ARCH_E2K_H */
+
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