mirror of
https://github.com/crosstool-ng/crosstool-ng.git
synced 2024-12-29 09:08:52 +00:00
1906cf93f8
You might just say: 'Yeah! crosstool-NG's got its own repo!". Unfortunately, that's because the previous repo got damaged beyond repair and I had no backup. That means I'm putting backups in place in the afternoon. That also means we've lost history... :-(
66 lines
2.0 KiB
Diff
66 lines
2.0 KiB
Diff
# see http://bugs.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&pr=4155
|
|
# and http://www.kegel.com/xgcc3/ppc405erratum77.html
|
|
# See also matching patch for linuxthreads
|
|
|
|
diff -aur glibc-2.2.5.orig/sysdeps/powerpc/atomicity.h glibc-2.2.5/sysdeps/powerpc/atomicity.h
|
|
--- glibc-2.2.5.orig/sysdeps/powerpc/atomicity.h Thu Jul 5 21:56:01 2001
|
|
+++ glibc-2.2.5/sysdeps/powerpc/atomicity.h Tue Jul 23 05:39:38 2002
|
|
@@ -28,6 +28,17 @@
|
|
# define __ATOMICITY_INLINE inline
|
|
#endif
|
|
|
|
+#ifdef __PPC405__
|
|
+/* workaround for PPC405 erratum #77 - Mark Hatle, dank. References:
|
|
+ http://www-3.ibm.com/chips/techlib/techlib.nsf/techdocs/89DED00DEBFF54BF87256A8000491BA2/$file/405CR_C_errata_1_2.pdf
|
|
+ http://ppc.bkbits.net:8080/linuxppc_2_4_devel/cset@1.489
|
|
+ http://www.kegel.com/xgcc3/ppc405erratum77.html
|
|
+ FIXME: using dbct instead of sync would be faster */
|
|
+#define __LIBC_PPC405_ERR77_SYNC "sync \n\t"
|
|
+#else
|
|
+#define __LIBC_PPC405_ERR77_SYNC
|
|
+#endif
|
|
+
|
|
static __ATOMICITY_INLINE int
|
|
__attribute__ ((unused))
|
|
exchange_and_add (volatile uint32_t *mem, int val)
|
|
@@ -36,6 +47,7 @@
|
|
__asm__ ("\n\
|
|
0: lwarx %0,0,%2 \n\
|
|
add%I3 %1,%0,%3 \n\
|
|
+ " __LIBC_PPC405_ERR77_SYNC "\n\
|
|
stwcx. %1,0,%2 \n\
|
|
bne- 0b \n\
|
|
" : "=&b"(result), "=&r"(tmp) : "r" (mem), "Ir"(val) : "cr0", "memory");
|
|
@@ -50,6 +62,7 @@
|
|
__asm__ ("\n\
|
|
0: lwarx %0,0,%1 \n\
|
|
add%I2 %0,%0,%2 \n\
|
|
+ " __LIBC_PPC405_ERR77_SYNC "\n\
|
|
stwcx. %0,0,%1 \n\
|
|
bne- 0b \n\
|
|
" : "=&b"(tmp) : "r" (mem), "Ir"(val) : "cr0", "memory");
|
|
@@ -65,6 +78,7 @@
|
|
sub%I2c. %0,%0,%2 \n\
|
|
cntlzw %0,%0 \n\
|
|
bne- 1f \n\
|
|
+ " __LIBC_PPC405_ERR77_SYNC "\n\
|
|
stwcx. %3,0,%1 \n\
|
|
bne- 0b \n\
|
|
1: \n\
|
|
@@ -79,6 +93,7 @@
|
|
long int result;
|
|
__asm__ ("\n\
|
|
0: lwarx %0,0,%1 \n\
|
|
+ " __LIBC_PPC405_ERR77_SYNC "\n\
|
|
stwcx. %2,0,%1 \n\
|
|
bne- 0b \n\
|
|
" : "=&r"(result) : "r"(p), "r"(newval) : "cr0", "memory");
|
|
@@ -94,6 +109,7 @@
|
|
0: lwarx %0,0,%1 \n\
|
|
cmpwi %0,0 \n\
|
|
bne- 1f \n\
|
|
+ " __LIBC_PPC405_ERR77_SYNC "\n\
|
|
stwcx. %2,0,%1 \n\
|
|
bne- 0b \n\
|
|
1: \n\
|