diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/alpha/sysconf.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/alpha/sysconf.c | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/sysdeps/unix/sysv/linux/alpha/sysconf.c b/sysdeps/unix/sysv/linux/alpha/sysconf.c deleted file mode 100644 index 3e5b4ee85f..0000000000 --- a/sysdeps/unix/sysv/linux/alpha/sysconf.c +++ /dev/null @@ -1,152 +0,0 @@ -/* Copyright (C) 2004 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C 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. - - The GNU C 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 the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <assert.h> -#include <stdbool.h> -#include <stdlib.h> -#include <unistd.h> - - -static long int linux_sysconf (int name); - -#define CSHAPE(totalsize, linesize, assoc) \ - ((totalsize & ~0xff) | (linesize << 4) | assoc) - -extern long __libc_alpha_cache_shape[4]; - -static inline unsigned long -implver (void) -{ - unsigned long i; -#if __GNUC_PREREQ(3,3) - i = __builtin_alpha_implver (); -#else - asm ("implver %0" : "=r" (i)); -#endif - return i; -} - -static inline unsigned long -amask (unsigned long x) -{ - unsigned long r; -#if __GNUC_PREREQ(3,3) - r = __builtin_alpha_amask (x); -#else - asm ("amask %1,%0" : "=r"(r) : "Ir"(x)); -#endif - return r; -} - -/* Get the value of the system variable NAME. */ -long int -__sysconf (int name) -{ - long shape, index; - - /* We only handle the cache information here (for now). */ - if (name < _SC_LEVEL1_ICACHE_SIZE || name > _SC_LEVEL4_CACHE_LINESIZE) - return linux_sysconf (name); - - /* No Alpha has L4 caches. */ - if (name >= _SC_LEVEL4_CACHE_SIZE) - return -1; - - index = (name - _SC_LEVEL1_ICACHE_SIZE) / 3; - shape = __libc_alpha_cache_shape[index]; - if (shape == -2) - { - long shape_l1i, shape_l1d, shape_l2, shape_l3 = -1; - - /* ??? In the cases below for which we do not know L1 cache sizes, - we could do timings to measure sizes. But for the Bcache, it's - generally big enough that (without additional help) TLB effects - get in the way. We'd either need to be able to allocate large - pages or have the kernel do the timings from KSEG. Fortunately, - kernels beginning with 2.6.5 will pass us this info in auxvec. */ - - switch (implver()) - { - case 0: /* EV4 */ - /* EV4/LCA45 had 8k L1 caches; EV45 had 16k L1 caches. */ - /* EV4/EV45 had 128k to 16M 32-byte direct Bcache. LCA45 - had 64k to 8M 8-byte direct Bcache. Can't tell. */ - shape_l1i = shape_l1d = shape_l2 = CSHAPE (0, 5, 1); - break; - - case 1: /* EV5 */ - if (amask (1 << 8)) - { - /* MAX insns not present; either EV5 or EV56. */ - shape_l1i = shape_l1d = CSHAPE(8*1024, 5, 1); - /* ??? L2 and L3 *can* be configured as 32-byte line. */ - shape_l2 = CSHAPE (96*1024, 6, 3); - /* EV5/EV56 has 1M to 16M Bcache. */ - shape_l3 = CSHAPE (0, 6, 1); - } - else - { - /* MAX insns present; either PCA56 or PCA57. */ - /* PCA56 had 16k 64-byte cache; PCA57 had 32k Icache. */ - /* PCA56 had 8k 64-byte cache; PCA57 had 16k Dcache. */ - /* PCA5[67] had 512k to 4M Bcache. */ - shape_l1i = shape_l1d = shape_l2 = CSHAPE (0, 6, 1); - } - break; - - case 2: /* EV6 */ - shape_l1i = shape_l1d = CSHAPE(64*1024, 6, 2); - /* EV6/EV67/EV68* had 1M to 16M Bcache. */ - shape_l2 = CSHAPE (0, 6, 1); - break; - - case 3: /* EV7 */ - shape_l1i = shape_l1d = CSHAPE(64*1024, 6, 2); - shape_l2 = CSHAPE(7*1024*1024/4, 6, 7); - break; - - default: - shape_l1i = shape_l1d = shape_l2 = 0; - break; - } - - __libc_alpha_cache_shape[0] = shape_l1i; - __libc_alpha_cache_shape[1] = shape_l1d; - __libc_alpha_cache_shape[2] = shape_l2; - __libc_alpha_cache_shape[3] = shape_l3; - shape = __libc_alpha_cache_shape[index]; - } - - if (shape <= 0) - return shape; - - switch (name % 3) - { - case 0: /* total size */ - return shape & -0x100; - case 1: /* associativity */ - return shape & 0xf; - default: /* line size */ - return 1L << ((shape >> 4) & 0xf); - } -} - -/* Now the generic Linux version. */ -#undef __sysconf -#define __sysconf static linux_sysconf -#include "../sysconf.c" |