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192 lines
7.2 KiB
192 lines
7.2 KiB
From 3ca2c50727b3e3e22eb3606135a18c6212f516d2 Mon Sep 17 00:00:00 2001 |
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From: "Ryan S. Arnold" <rsa@linux.vnet.ibm.com> |
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Date: Fri, 28 Jun 2013 16:52:49 -0500 |
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Subject: [PATCH 40/42] PowerPC: Define AT_HWCAP2 bits and AT_HWCAP2 handling |
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for POWER8. (cherry picked from commit |
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89cd956937f46e8f4a0374994965f991642dd408) |
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--- |
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sysdeps/powerpc/Makefile | 2 +- |
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sysdeps/powerpc/bits/hwcap.h | 25 +++++++++++----- |
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sysdeps/powerpc/dl-procinfo.c | 10 ++++++- |
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sysdeps/powerpc/dl-procinfo.h | 53 ++++++++++++++++++++++++--------- |
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sysdeps/powerpc/rtld-global-offsets.sym | 1 + |
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6 files changed, 86 insertions(+), 23 deletions(-) |
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diff --git glibc-2.17-c758a686/sysdeps/powerpc/Makefile glibc-2.17-c758a686/sysdeps/powerpc/Makefile |
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index 7442b67..f75e625 100644 |
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--- glibc-2.17-c758a686/sysdeps/powerpc/Makefile |
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+++ glibc-2.17-c758a686/sysdeps/powerpc/Makefile |
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@@ -17,7 +17,7 @@ endif |
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endif |
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ifeq ($(subdir),csu) |
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-# get offset to rtld_global._dl_hwcap |
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+# get offset to rtld_global._dl_hwcap and rtld_global._dl_hwcap2 |
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gen-as-const-headers += rtld-global-offsets.sym |
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# get offset to __locale_struct.__ctype_tolower |
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gen-as-const-headers += locale-defines.sym |
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diff --git glibc-2.17-c758a686/sysdeps/powerpc/bits/hwcap.h glibc-2.17-c758a686/sysdeps/powerpc/bits/hwcap.h |
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index 89e7d8b..0c02fc6 100644 |
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--- glibc-2.17-c758a686/sysdeps/powerpc/bits/hwcap.h |
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+++ glibc-2.17-c758a686/sysdeps/powerpc/bits/hwcap.h |
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@@ -1,5 +1,5 @@ |
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-/* Defines for bits in AT_HWCAP. |
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- Copyright (C) 2012 Free Software Foundation, Inc. |
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+/* Defines for bits in AT_HWCAP and AT_HWCAP2. |
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+ Copyright (C) 2012-2013 Free Software Foundation, Inc. |
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This file is part of the GNU C Library. |
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The GNU C Library is free software; you can redistribute it and/or |
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@@ -20,9 +20,9 @@ |
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# error "Never include <bits/hwcap.h> directly; use <sys/auxv.h> instead." |
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#endif |
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-/* |
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- * The following must match the kernels asm/cputable.h. |
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- */ |
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+/* The bit numbers must match those in the kernel's asm/cputable.h. */ |
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+ |
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+/* Feature definitions in AT_HWCAP. */ |
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#define PPC_FEATURE_32 0x80000000 /* 32-bit mode. */ |
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#define PPC_FEATURE_64 0x40000000 /* 64-bit mode. */ |
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#define PPC_FEATURE_601_INSTR 0x20000000 /* 601 chip, Old POWER ISA. */ |
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@@ -39,8 +39,9 @@ |
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#define PPC_FEATURE_POWER5 0x00040000 /* POWER5 ISA 2.02 */ |
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#define PPC_FEATURE_POWER5_PLUS 0x00020000 /* POWER5+ ISA 2.03 */ |
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#define PPC_FEATURE_CELL_BE 0x00010000 /* CELL Broadband Engine */ |
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-#define PPC_FEATURE_BOOKE 0x00008000 |
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-#define PPC_FEATURE_SMT 0x00004000 /* Simultaneous Multi-Threading */ |
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+#define PPC_FEATURE_BOOKE 0x00008000 /* ISA Category Embedded */ |
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+#define PPC_FEATURE_SMT 0x00004000 /* Simultaneous |
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+ Multi-Threading */ |
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#define PPC_FEATURE_ICACHE_SNOOP 0x00002000 |
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#define PPC_FEATURE_ARCH_2_05 0x00001000 /* ISA 2.05 */ |
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#define PPC_FEATURE_PA6T 0x00000800 /* PA Semi 6T Core */ |
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@@ -51,3 +52,13 @@ |
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#define PPC_FEATURE_PSERIES_PERFMON_COMPAT 0x00000040 |
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#define PPC_FEATURE_TRUE_LE 0x00000002 |
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#define PPC_FEATURE_PPC_LE 0x00000001 |
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+ |
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+/* Feature definitions in AT_HWCAP2. */ |
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+#define PPC_FEATURE2_ARCH_2_07 0x80000000 /* ISA 2.07 */ |
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+#define PPC_FEATURE2_HAS_HTM 0x40000000 /* Hardware Transactional |
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+ Memory */ |
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+#define PPC_FEATURE2_HAS_DSCR 0x20000000 /* Data Stream Control |
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+ Register */ |
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+#define PPC_FEATURE2_HAS_EBB 0x10000000 /* Event Base Branching */ |
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+#define PPC_FEATURE2_HAS_ISEL 0x08000000 /* Integer Select */ |
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+#define PPC_FEATURE2_HAS_TAR 0x04000000 /* Target Address Register */ |
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diff --git glibc-2.17-c758a686/sysdeps/powerpc/dl-procinfo.c glibc-2.17-c758a686/sysdeps/powerpc/dl-procinfo.c |
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index efab165..6cebf99 100644 |
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--- glibc-2.17-c758a686/sysdeps/powerpc/dl-procinfo.c |
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+++ glibc-2.17-c758a686/sysdeps/powerpc/dl-procinfo.c |
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@@ -45,7 +45,7 @@ |
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#if !defined PROCINFO_DECL && defined SHARED |
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._dl_powerpc_cap_flags |
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#else |
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-PROCINFO_CLASS const char _dl_powerpc_cap_flags[25][10] |
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+PROCINFO_CLASS const char _dl_powerpc_cap_flags[57][10] |
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#endif |
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#ifndef PROCINFO_DECL |
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= { |
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@@ -56,6 +56,14 @@ PROCINFO_CLASS const char _dl_powerpc_cap_flags[25][10] |
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"notb", "efpdouble", "efpsingle", "spe", |
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"ucache", "4xxmac", "mmu", "fpu", |
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"altivec", "ppc601", "ppc64", "ppc32", |
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+ "", "", "", "", |
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+ "", "", "", "", |
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+ "", "", "", "", |
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+ "", "", "", "", |
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+ "", "", "", "", |
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+ "", "", "", "", |
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+ "", "", "tar", "isel", |
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+ "ebb", "dscr", "htm", "arch_2_07", |
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} |
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#endif |
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#if !defined SHARED || defined PROCINFO_DECL |
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diff --git glibc-2.17-c758a686/sysdeps/powerpc/dl-procinfo.h glibc-2.17-c758a686/sysdeps/powerpc/dl-procinfo.h |
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index 7732ed2..dc3b70e 100644 |
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--- glibc-2.17-c758a686/sysdeps/powerpc/dl-procinfo.h |
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+++ glibc-2.17-c758a686/sysdeps/powerpc/dl-procinfo.h |
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@@ -20,11 +20,21 @@ |
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#define _DL_PROCINFO_H 1 |
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#include <ldsodefs.h> |
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-#include <sysdep.h> /* This defines the PPC_FEATURE_* macros. */ |
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+#include <sysdep.h> /* This defines the PPC_FEATURE[2]_* macros. */ |
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/* There are 25 bits used, but they are bits 7..31. */ |
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#define _DL_HWCAP_FIRST 7 |
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-#define _DL_HWCAP_COUNT 32 |
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+ |
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+/* The total number of available bits (including those prior to |
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+ _DL_HWCAP_FIRST). Some of these bits might not be used. */ |
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+#define _DL_HWCAP_COUNT 64 |
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+ |
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+/* Features started at bit 31 and decremented as new features were added. */ |
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+#define _DL_HWCAP_LAST 31 |
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+ |
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+/* AT_HWCAP2 features started at bit 31 and decremented as new features were |
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+ added. HWCAP2 feature bits start at bit 0. */ |
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+#define _DL_HWCAP2_LAST 31 |
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/* These bits influence library search. */ |
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#define HWCAP_IMPORTANT (PPC_FEATURE_HAS_ALTIVEC \ |
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@@ -161,18 +171,33 @@ static inline int |
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__attribute__ ((unused)) |
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_dl_procinfo (unsigned int type, unsigned long int word) |
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{ |
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- /* Fallback to unknown output mechanism. */ |
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- if (type == AT_HWCAP2) |
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- return -1; |
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- |
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- _dl_printf ("AT_HWCAP: "); |
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- |
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- for (int i = _DL_HWCAP_FIRST; i < _DL_HWCAP_COUNT; ++i) |
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- if (word & (1 << i)) |
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- _dl_printf (" %s", _dl_hwcap_string (i)); |
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- |
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- _dl_printf ("\n"); |
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- |
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+ switch(type) |
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+ { |
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+ case AT_HWCAP: |
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+ _dl_printf ("AT_HWCAP: "); |
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+ |
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+ for (int i = _DL_HWCAP_FIRST; i <= _DL_HWCAP_LAST; ++i) |
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+ if (word & (1 << i)) |
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+ _dl_printf (" %s", _dl_hwcap_string (i)); |
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+ break; |
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+ case AT_HWCAP2: |
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+ { |
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+ unsigned int offset = _DL_HWCAP_LAST + 1; |
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+ |
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+ _dl_printf ("AT_HWCAP2: "); |
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+ |
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+ /* We have to go through them all because the kernel added the |
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+ AT_HWCAP2 features starting with the high bits. */ |
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+ for (int i = 0; i <= _DL_HWCAP2_LAST; ++i) |
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+ if (word & (1 << i)) |
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+ _dl_printf (" %s", _dl_hwcap_string (offset + i)); |
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+ break; |
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+ } |
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+ default: |
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+ /* This should not happen. */ |
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+ return -1; |
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+ } |
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+ _dl_printf ("\n"); |
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return 0; |
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} |
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#endif |
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diff --git glibc-2.17-c758a686/sysdeps/powerpc/rtld-global-offsets.sym glibc-2.17-c758a686/sysdeps/powerpc/rtld-global-offsets.sym |
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index ff4e97f..f5ea5a1 100644 |
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--- glibc-2.17-c758a686/sysdeps/powerpc/rtld-global-offsets.sym |
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+++ glibc-2.17-c758a686/sysdeps/powerpc/rtld-global-offsets.sym |
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@@ -5,3 +5,4 @@ |
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#define rtld_global_ro_offsetof(mem) offsetof (struct rtld_global_ro, mem) |
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RTLD_GLOBAL_RO_DL_HWCAP_OFFSET rtld_global_ro_offsetof (_dl_hwcap) |
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+RTLD_GLOBAL_RO_DL_HWCAP2_OFFSET rtld_global_ro_offsetof (_dl_hwcap2) |
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-- |
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1.7.11.7
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