[dpdk-dev] [PATCH v7 1/8] eal: eal stub to add windows support

[Anand Rawat <anand.rawat@intel.com>]

Added initial stub source files for windows support
and only the required meson changes for windows.

Signed-off-by: Pallavi Kadam <pallavi.kadam@intel.com>
Signed-off-by: Anand Rawat <anand.rawat@intel.com>
Reviewed-by: Jeff Shaw <jeffrey.b.shaw@intel.com>
Reviewed-by: Ranjit Menon <ranjit.menon@intel.com>
---
 config/meson.build                      | 23 ++++++++++++------
 config/x86/meson.build                  | 14 ++++++-----
 lib/librte_eal/meson.build              |  6 ++++-
 lib/librte_eal/windows/eal/eal.c        | 14 +++++++++++
 lib/librte_eal/windows/eal/eal_debug.c  | 15 ++++++++++++
 lib/librte_eal/windows/eal/eal_lcore.c  | 32 +++++++++++++++++++++++++
 lib/librte_eal/windows/eal/eal_thread.c | 18 ++++++++++++++
 lib/librte_eal/windows/eal/meson.build  | 10 ++++++++
 8 files changed, 118 insertions(+), 14 deletions(-)
 create mode 100644 lib/librte_eal/windows/eal/eal.c
 create mode 100644 lib/librte_eal/windows/eal/eal_debug.c
 create mode 100644 lib/librte_eal/windows/eal/eal_lcore.c
 create mode 100644 lib/librte_eal/windows/eal/eal_thread.c
 create mode 100644 lib/librte_eal/windows/eal/meson.build

diff --git a/config/meson.build b/config/meson.build
index 30a7261a5..4bd73b1e9 100644
--- a/config/meson.build
+++ b/config/meson.build
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: BSD-3-Clause
-# Copyright(c) 2017 Intel Corporation
+# Copyright(c) 2017-2019 Intel Corporation
 
 # set the major version, which might be used by drivers and libraries
 # depending on the configuration options
@@ -80,18 +80,27 @@ dpdk_extra_ldflags += '-Wl,--no-as-needed'
 add_project_link_arguments('-pthread', language: 'c')
 dpdk_extra_ldflags += '-pthread'
 
-# some libs depend on maths lib
-add_project_link_arguments('-lm', language: 'c')
-dpdk_extra_ldflags += '-lm'
+# on some OS, maths functions are in a separate library
+if cc.find_library('lm', required : false).found()
+	# some libs depend on maths lib
+	add_project_link_arguments('-lm', language: 'c')
+	dpdk_extra_ldflags += '-lm'
+endif
 
 # for linux link against dl, for bsd execinfo
 if host_machine.system() == 'linux'
 	link_lib = 'dl'
-else
+elif host_machine.system() == 'freebsd'
 	link_lib = 'execinfo'
+else
+	link_lib = ''
+endif
+
+# if link_lib is empty, do not add it to project properties
+if link_lib != ''
+	add_project_link_arguments('-l' + link_lib, language: 'c')
+	dpdk_extra_ldflags += '-l' + link_lib
 endif
-add_project_link_arguments('-l' + link_lib, language: 'c')
-dpdk_extra_ldflags += '-l' + link_lib
 
 # check for libraries used in multiple places in DPDK
 has_libnuma = 0
diff --git a/config/x86/meson.build b/config/x86/meson.build
index 7504cb9e5..558edfda9 100644
--- a/config/x86/meson.build
+++ b/config/x86/meson.build
@@ -1,15 +1,17 @@
 # SPDX-License-Identifier: BSD-3-Clause
-# Copyright(c) 2017 Intel Corporation
+# Copyright(c) 2017-2019 Intel Corporation
 
 # for checking defines we need to use the correct compiler flags
 march_opt = ['-march=@0@'.format(machine)]
 
 # get binutils version for the workaround of Bug 97
-ldver = run_command('ld', '-v').stdout().strip()
-if ldver.contains('2.30')
-	if cc.has_argument('-mno-avx512f')
-		march_opt += '-mno-avx512f'
-		message('Binutils 2.30 detected, disabling AVX512 support as workaround for bug #97')
+if host_machine.system() != 'windows'
+	ldver = run_command('ld', '-v').stdout().strip()
+	if ldver.contains('2.30')
+		if cc.has_argument('-mno-avx512f')
+			march_opt += '-mno-avx512f'
+			message('Binutils 2.30 detected, disabling AVX512 support as workaround for bug #97')
+		endif
 	endif
 endif
 
diff --git a/lib/librte_eal/meson.build b/lib/librte_eal/meson.build
index d48c5e11d..1863622c0 100644
--- a/lib/librte_eal/meson.build
+++ b/lib/librte_eal/meson.build
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: BSD-3-Clause
-# Copyright(c) 2017 Intel Corporation
+# Copyright(c) 2017-2019 Intel Corporation
 
 # Custom EAL processing. EAL is complicated enough that it can't just
 # have a straight list of headers and source files.
@@ -17,6 +17,10 @@ elif host_machine.system() == 'freebsd'
 	dpdk_conf.set('RTE_EXEC_ENV_FREEBSD', 1)
 	subdir('freebsd/eal')
 
+elif host_machine.system() == 'windows'
+	dpdk_conf.set('RTE_EXEC_ENV_WINDOWS', 1)
+	subdir('windows/eal')
+
 else
 	error('unsupported system type "@0@"'.format(host_machine.system()))
 endif
diff --git a/lib/librte_eal/windows/eal/eal.c b/lib/librte_eal/windows/eal/eal.c
new file mode 100644
index 000000000..37ed42233
--- /dev/null
+++ b/lib/librte_eal/windows/eal/eal.c
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2019 Intel Corporation
+ */
+
+#include <rte_common.h>
+
+ /* Launch threads, called at application init(). */
+int
+rte_eal_init(int argc __rte_unused, char **argv __rte_unused)
+{
+	/* TODO */
+	/* This is a stub, not the expected result */
+	return 0;
+}
diff --git a/lib/librte_eal/windows/eal/eal_debug.c b/lib/librte_eal/windows/eal/eal_debug.c
new file mode 100644
index 000000000..a9705e257
--- /dev/null
+++ b/lib/librte_eal/windows/eal/eal_debug.c
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2019 Intel Corporation
+ */
+
+#include <rte_common.h>
+
+ /* call abort(), it will generate a coredump if enabled */
+void
+__rte_panic(const char *funcname __rte_unused,
+		const char *format __rte_unused, ...)
+{
+	/* TODO */
+	/* This is a stub, not the expected result */
+	abort();
+}
diff --git a/lib/librte_eal/windows/eal/eal_lcore.c b/lib/librte_eal/windows/eal/eal_lcore.c
new file mode 100644
index 000000000..e4fcb2615
--- /dev/null
+++ b/lib/librte_eal/windows/eal/eal_lcore.c
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2019 Intel Corporation
+ */
+
+#include <rte_common.h>
+
+ /* Get the cpu core id value */
+unsigned int
+eal_cpu_core_id(unsigned int lcore_id)
+{
+	/* TODO */
+	/* This is a stub, not the expected result */
+	return lcore_id;
+}
+
+/* Check if a cpu is present by the presence of the cpu information for it */
+int
+eal_cpu_detected(unsigned int lcore_id __rte_unused)
+{
+	/* TODO */
+	/* This is a stub, not the expected result */
+	return 1;
+}
+
+/* Get CPU socket id (NUMA node) for a logical core */
+unsigned int
+eal_cpu_socket_id(unsigned int cpu_id __rte_unused)
+{
+	/* TODO */
+	/* This is a stub, not the expected result */
+	return 0;
+}
diff --git a/lib/librte_eal/windows/eal/eal_thread.c b/lib/librte_eal/windows/eal/eal_thread.c
new file mode 100644
index 000000000..f701443c3
--- /dev/null
+++ b/lib/librte_eal/windows/eal/eal_thread.c
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2019 Intel Corporation
+ */
+
+#include <windows.h>
+
+#include <rte_common.h>
+
+typedef uintptr_t eal_thread_t;
+
+/* function to create threads */
+int
+eal_thread_create(eal_thread_t *thread __rte_unused)
+{
+	/* TODO */
+	/* This is a stub, not the expected result */
+	return 0;
+}
diff --git a/lib/librte_eal/windows/eal/meson.build b/lib/librte_eal/windows/eal/meson.build
new file mode 100644
index 000000000..8b1735623
--- /dev/null
+++ b/lib/librte_eal/windows/eal/meson.build
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2019 Intel Corporation
+
+env_objs = []
+env_headers = []
+env_sources = files('eal.c',
+	'eal_debug.c',
+	'eal_lcore.c',
+	'eal_thread.c',
+)
-- 
2.17.1.windows.2