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[PATCH 0/3] aarch64: Add AmpereComputing emag to tunable cpu list
- From: Feng Xue <fxue at os dot amperecomputing dot com>
- To: "libc-alpha at sourceware dot org" <libc-alpha at sourceware dot org>
- Cc: Feng Xue <fxue at os dot amperecomputing dot com>
- Date: Tue, 18 Dec 2018 09:49:55 +0000
- Subject: [PATCH 0/3] aarch64: Add AmpereComputing emag to tunable cpu list
This patch and following patches are from AmpereComputing, which target AmpereComputing's emag processor. Hope your code reviews on these patches. And we have already signed a copyright assignement with the FSF.
Thanks,
Feng
---
Emag is a 64-bit CPU core released by AmpereComputing.
Add its name to cpu list, and corresponding macro as utilities for
later IFUNC dispatch.
* manual/tunables.texi (Tunable glibc.cpu.name): Add emag.
* sysdeps/unix/sysv/linux/aarch64/cpu-features.c (cpu_list):
Add emag.
* sysdeps/unix/sysv/linux/aarch64/cpu-features.h (IS_EMAG):
New macro.
---
ChangeLog | 8 ++++++++
manual/tunables.texi | 2 +-
sysdeps/unix/sysv/linux/aarch64/cpu-features.c | 1 +
sysdeps/unix/sysv/linux/aarch64/cpu-features.h | 3 +++
4 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/ChangeLog b/ChangeLog
index e0e7a74..ee2119b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2018-12-17 Feng Xue <fxue@os.amperecomputing.com>
+
+ * manual/tunables.texi (Tunable glibc.cpu.name): Add emag.
+ * sysdeps/unix/sysv/linux/aarch64/cpu-features.c (cpu_list):
+ Add emag.
+ * sysdeps/unix/sysv/linux/aarch64/cpu-features.h (IS_EMAG):
+ New macro.
+
2018-12-15 Paul Eggert <eggert@cs.ucla.edu>
regex: fix storage-exhaustion error
diff --git a/manual/tunables.texi b/manual/tunables.texi
index 09a2565..1a20e95 100644
--- a/manual/tunables.texi
+++ b/manual/tunables.texi
@@ -360,7 +360,7 @@ This tunable is specific to powerpc, powerpc64 and powerpc64le.
The @code{glibc.cpu.name=xxx} tunable allows the user to tell @theglibc{} to
assume that the CPU is @code{xxx} where xxx may have one of these values:
@code{generic}, @code{falkor}, @code{thunderxt88}, @code{thunderx2t99},
-@code{thunderx2t99p1}.
+@code{thunderx2t99p1}, @code{emag}.
This tunable is specific to aarch64.
@end deftp
diff --git a/sysdeps/unix/sysv/linux/aarch64/cpu-features.c b/sysdeps/unix/sysv/linux/aarch64/cpu-features.c
index b4f3485..07138ea 100644
--- a/sysdeps/unix/sysv/linux/aarch64/cpu-features.c
+++ b/sysdeps/unix/sysv/linux/aarch64/cpu-features.c
@@ -36,6 +36,7 @@ static struct cpu_list cpu_list[] = {
{"thunderx2t99", 0x431F0AF0},
{"thunderx2t99p1", 0x420F5160},
{"phecda", 0x680F0000},
+ {"emag", 0x503F0001},
{"generic", 0x0}
};
diff --git a/sysdeps/unix/sysv/linux/aarch64/cpu-features.h b/sysdeps/unix/sysv/linux/aarch64/cpu-features.h
index eb35adf..95b17d4 100644
--- a/sysdeps/unix/sysv/linux/aarch64/cpu-features.h
+++ b/sysdeps/unix/sysv/linux/aarch64/cpu-features.h
@@ -52,6 +52,9 @@
#define IS_PHECDA(midr) (MIDR_IMPLEMENTOR(midr) == 'h' \
&& MIDR_PARTNUM(midr) == 0x000)
+#define IS_EMAG(midr) (MIDR_IMPLEMENTOR(midr) == 'P' \
+ && MIDR_PARTNUM(midr) == 0x000)
+
struct cpu_features
{
uint64_t midr_el1;
--
1.8.3.1