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PowerPC: Define AT_HWCAP2 bits and AT_HWCAP2 handling for POWER8.
This commit is contained in:
Ryan S. Arnold
parent
26e690b253
commit
dd8d5080a6
18
ChangeLog
18
ChangeLog
@ -1,3 +1,21 @@
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2013-06-28 Ryan S. Arnold <rsa@linux.vnet.ibm.com>
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* sysdeps/powerpc/Makefile: Add comment about generating an offset to
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rtld_global._dl_hwcap2.
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* sysdeps/powerpc/bits/hwcap.h: Added PPC_FEATURE2_* definitions for
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POWER8.
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* sysdeps/powerpc/dl-procinfo.c (_dl_powerpc_cap_flags): Extend for
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POWER8 feature descriptions defined in _dl_hwcap2.
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* sysdeps/powerpc/dl-procinfo.h (_dl_procinfo): Implement AT_HWCAP2
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string handling for POWER8 feature bits.
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(_DL_HWCAP_COUNT): Increment to 64 to cover AT_HWCAP2 bits.
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(_DL_HWCAP_LAST): New definition for position of last AT_HWCAP bit in
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_dl_powerpc_cap_flags.
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(_DL_HWCAP2_LAST): New definition for last usable bit of AT_HWCAP2.
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* sysdeps/powerpc/rtld-global-offsets.sym
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(RTLD_GLOBAL_RO_DL_HWCAP2_OFFSET): New offset macro to locate
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_dl_hwcap2 in the rtld_global_ro structure.
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2013-06-28 Ryan S. Arnold <rsa@linux.vnet.ibm.com>
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* elf/dl-support.c (_dl_hwcap2): Add a new hwcap field for more
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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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@ -1,4 +1,4 @@
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/* Defines for bits in AT_HWCAP.
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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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@ -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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/* 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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/* 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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@ -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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@ -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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/* 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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/* 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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/* 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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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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_dl_printf ("AT_HWCAP: ");
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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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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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_dl_printf ("\n");
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_dl_printf ("AT_HWCAP2: ");
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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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@ -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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