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authorLinus Torvalds <torvalds@linux-foundation.org>2013-07-10 10:10:02 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-10 10:10:02 -0700
commitb247759642cc96a75122907cc898b4c43b4f86ce (patch)
tree568e6ab08f2b986ff0b1ef80318c6c56c5d2ef42 /arch
parent61e312914cc82c085c945f88e5a53d507dd7d0d4 (diff)
parent5b879d78bc0818aa710f5d4d9abbfc2aca075cc3 (diff)
downloadlinux-b247759642cc96a75122907cc898b4c43b4f86ce.tar.gz
Merge branch 'parisc-for-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc updates from Helge Deller: "The PA-RISC updates for v3.11 include a gcc miscompilation fix, gzip-compressed vmlinuz support, a fix in the PCI code for ATI FireGL support on c8000 machines, a fix to prevent that %sr1 is being clobbered and a few smaller optimizations and documentation updates" * 'parisc-for-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: Fix gcc miscompilation in pa_memcpy() parisc: Ensure volatile space register %sr1 is not clobbered parisc: optimize mtsp(0,sr) inline assembly parisc: switch to gzip-compressed vmlinuz kernel parisc: document the shadow registers parisc: more capabilities info in /proc/cpuinfo parisc: fix LMMIO mismatch between PAT length and MASK register
Diffstat (limited to 'arch')
-rw-r--r--arch/parisc/Makefile15
-rw-r--r--arch/parisc/defpalo.conf8
-rw-r--r--arch/parisc/include/asm/special_insns.h9
-rw-r--r--arch/parisc/include/asm/tlbflush.h5
-rw-r--r--arch/parisc/install.sh6
-rw-r--r--arch/parisc/kernel/cache.c2
-rw-r--r--arch/parisc/kernel/processor.c19
-rw-r--r--arch/parisc/lib/memcpy.c79
8 files changed, 94 insertions, 49 deletions
diff --git a/arch/parisc/Makefile b/arch/parisc/Makefile
index 96ec3982be8..e02f665f804 100644
--- a/arch/parisc/Makefile
+++ b/arch/parisc/Makefile
@@ -17,6 +17,8 @@
# Mike Shaver, Helge Deller and Martin K. Petersen
#
+KBUILD_IMAGE := vmlinuz
+
KBUILD_DEFCONFIG := default_defconfig
NM = sh $(srctree)/arch/parisc/nm
@@ -92,7 +94,7 @@ PALOCONF := $(shell if [ -f $(src)/palo.conf ]; then echo $(src)/palo.conf; \
else echo $(obj)/palo.conf; \
fi)
-palo: vmlinux
+palo: vmlinuz
@if test ! -x "$(PALO)"; then \
echo 'ERROR: Please install palo first (apt-get install palo)';\
echo 'or build it from source and install it somewhere in your $$PATH';\
@@ -107,10 +109,14 @@ palo: vmlinux
fi
$(PALO) -f $(PALOCONF)
-# Shorthands for known targets not supported by parisc, use vmlinux as default
-Image zImage bzImage: vmlinux
+# Shorthands for known targets not supported by parisc, use vmlinux/vmlinuz as default
+Image: vmlinux
+zImage bzImage: vmlinuz
+
+vmlinuz: vmlinux
+ @gzip -cf -9 $< > $@
-install: vmlinux
+install: vmlinuz
sh $(src)/arch/parisc/install.sh \
$(KERNELRELEASE) $< System.map "$(INSTALL_PATH)"
@@ -119,6 +125,7 @@ MRPROPER_FILES += palo.conf
define archhelp
@echo '* vmlinux - Uncompressed kernel image (./vmlinux)'
+ @echo ' vmlinuz - Compressed kernel image (./vmlinuz)'
@echo ' palo - Bootable image (./lifimage)'
@echo ' install - Install kernel using'
@echo ' (your) ~/bin/$(INSTALLKERNEL) or'
diff --git a/arch/parisc/defpalo.conf b/arch/parisc/defpalo.conf
index 4e1ae25b08d..208ff3b4148 100644
--- a/arch/parisc/defpalo.conf
+++ b/arch/parisc/defpalo.conf
@@ -4,7 +4,7 @@
# Most people using 'make palo' want a bootable file, usable for
# network or tape booting for example.
--init-tape=lifimage
---recoverykernel=vmlinux
+--recoverykernel=vmlinuz
########## Pick your ROOT here! ##########
# You need at least one 'root='!
@@ -12,10 +12,10 @@
# If you want a root ramdisk, use the next 2 lines
# (Edit the ramdisk image name!!!!)
--ramdisk=ram-disk-image-file
---commandline=0/vmlinux HOME=/ root=/dev/ram initrd=0/ramdisk
+--commandline=0/vmlinuz HOME=/ root=/dev/ram initrd=0/ramdisk panic_timeout=60 panic=-1
# If you want NFS root, use the following command line (Edit the HOSTNAME!!!)
-#--commandline=0/vmlinux HOME=/ root=/dev/nfs nfsroot=HOSTNAME ip=bootp
+#--commandline=0/vmlinuz HOME=/ root=/dev/nfs nfsroot=HOSTNAME ip=bootp
# If you have root on a disk partition, use this (Edit the partition name!!!)
-#--commandline=0/vmlinux HOME=/ root=/dev/sda1
+#--commandline=0/vmlinuz HOME=/ root=/dev/sda1
diff --git a/arch/parisc/include/asm/special_insns.h b/arch/parisc/include/asm/special_insns.h
index d306b75bc77..e1509308899 100644
--- a/arch/parisc/include/asm/special_insns.h
+++ b/arch/parisc/include/asm/special_insns.h
@@ -32,9 +32,12 @@ static inline void set_eiem(unsigned long val)
cr; \
})
-#define mtsp(gr, cr) \
- __asm__ __volatile__("mtsp %0,%1" \
+#define mtsp(val, cr) \
+ { if (__builtin_constant_p(val) && ((val) == 0)) \
+ __asm__ __volatile__("mtsp %%r0,%0" : : "i" (cr) : "memory"); \
+ else \
+ __asm__ __volatile__("mtsp %0,%1" \
: /* no outputs */ \
- : "r" (gr), "i" (cr) : "memory")
+ : "r" (val), "i" (cr) : "memory"); }
#endif /* __PARISC_SPECIAL_INSNS_H */
diff --git a/arch/parisc/include/asm/tlbflush.h b/arch/parisc/include/asm/tlbflush.h
index 5273da991e0..9d086a599fa 100644
--- a/arch/parisc/include/asm/tlbflush.h
+++ b/arch/parisc/include/asm/tlbflush.h
@@ -63,13 +63,14 @@ static inline void flush_tlb_mm(struct mm_struct *mm)
static inline void flush_tlb_page(struct vm_area_struct *vma,
unsigned long addr)
{
- unsigned long flags;
+ unsigned long flags, sid;
/* For one page, it's not worth testing the split_tlb variable */
mb();
- mtsp(vma->vm_mm->context,1);
+ sid = vma->vm_mm->context;
purge_tlb_start(flags);
+ mtsp(sid, 1);
pdtlb(addr);
pitlb(addr);
purge_tlb_end(flags);
diff --git a/arch/parisc/install.sh b/arch/parisc/install.sh
index e593fc8d58b..4da682b466d 100644
--- a/arch/parisc/install.sh
+++ b/arch/parisc/install.sh
@@ -26,13 +26,13 @@ if [ -x /sbin/${INSTALLKERNEL} ]; then exec /sbin/${INSTALLKERNEL} "$@"; fi
# Default install
-if [ -f $4/vmlinux ]; then
- mv $4/vmlinux $4/vmlinux.old
+if [ -f $4/vmlinuz ]; then
+ mv $4/vmlinuz $4/vmlinuz.old
fi
if [ -f $4/System.map ]; then
mv $4/System.map $4/System.old
fi
-cat $2 > $4/vmlinux
+cat $2 > $4/vmlinuz
cp $3 $4/System.map
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index 65fb4cbc3a0..2e65aa54bd1 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -440,8 +440,8 @@ void __flush_tlb_range(unsigned long sid, unsigned long start,
else {
unsigned long flags;
- mtsp(sid, 1);
purge_tlb_start(flags);
+ mtsp(sid, 1);
if (split_tlb) {
while (npages--) {
pdtlb(start);
diff --git a/arch/parisc/kernel/processor.c b/arch/parisc/kernel/processor.c
index c8fb61ed32f..8a96c8ab9fe 100644
--- a/arch/parisc/kernel/processor.c
+++ b/arch/parisc/kernel/processor.c
@@ -371,10 +371,23 @@ show_cpuinfo (struct seq_file *m, void *v)
seq_printf(m, "capabilities\t:");
if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS32)
- seq_printf(m, " os32");
+ seq_puts(m, " os32");
if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS64)
- seq_printf(m, " os64");
- seq_printf(m, "\n");
+ seq_puts(m, " os64");
+ if (boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC)
+ seq_puts(m, " iopdir_fdc");
+ switch (boot_cpu_data.pdc.capabilities & PDC_MODEL_NVA_MASK) {
+ case PDC_MODEL_NVA_SUPPORTED:
+ seq_puts(m, " nva_supported");
+ break;
+ case PDC_MODEL_NVA_SLOW:
+ seq_puts(m, " nva_slow");
+ break;
+ case PDC_MODEL_NVA_UNSUPPORTED:
+ seq_puts(m, " needs_equivalent_aliasing");
+ break;
+ }
+ seq_printf(m, " (0x%02lx)\n", boot_cpu_data.pdc.capabilities);
seq_printf(m, "model\t\t: %s\n"
"model name\t: %s\n",
diff --git a/arch/parisc/lib/memcpy.c b/arch/parisc/lib/memcpy.c
index a49cc812df8..ac4370b1ca4 100644
--- a/arch/parisc/lib/memcpy.c
+++ b/arch/parisc/lib/memcpy.c
@@ -2,6 +2,7 @@
* Optimized memory copy routines.
*
* Copyright (C) 2004 Randolph Chung <tausq@debian.org>
+ * Copyright (C) 2013 Helge Deller <deller@gmx.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -153,17 +154,21 @@ static inline void prefetch_dst(const void *addr)
#define prefetch_dst(addr) do { } while(0)
#endif
+#define PA_MEMCPY_OK 0
+#define PA_MEMCPY_LOAD_ERROR 1
+#define PA_MEMCPY_STORE_ERROR 2
+
/* Copy from a not-aligned src to an aligned dst, using shifts. Handles 4 words
* per loop. This code is derived from glibc.
*/
-static inline unsigned long copy_dstaligned(unsigned long dst, unsigned long src, unsigned long len, unsigned long o_dst, unsigned long o_src, unsigned long o_len)
+static inline unsigned long copy_dstaligned(unsigned long dst,
+ unsigned long src, unsigned long len)
{
/* gcc complains that a2 and a3 may be uninitialized, but actually
* they cannot be. Initialize a2/a3 to shut gcc up.
*/
register unsigned int a0, a1, a2 = 0, a3 = 0;
int sh_1, sh_2;
- struct exception_data *d;
/* prefetch_src((const void *)src); */
@@ -197,7 +202,7 @@ static inline unsigned long copy_dstaligned(unsigned long dst, unsigned long src
goto do2;
case 0:
if (len == 0)
- return 0;
+ return PA_MEMCPY_OK;
/* a3 = ((unsigned int *) src)[0];
a0 = ((unsigned int *) src)[1]; */
ldw(s_space, 0, src, a3, cda_ldw_exc);
@@ -256,42 +261,35 @@ do0:
preserve_branch(handle_load_error);
preserve_branch(handle_store_error);
- return 0;
+ return PA_MEMCPY_OK;
handle_load_error:
__asm__ __volatile__ ("cda_ldw_exc:\n");
- d = &__get_cpu_var(exception_data);
- DPRINTF("cda_ldw_exc: o_len=%lu fault_addr=%lu o_src=%lu ret=%lu\n",
- o_len, d->fault_addr, o_src, o_len - d->fault_addr + o_src);
- return o_len * 4 - d->fault_addr + o_src;
+ return PA_MEMCPY_LOAD_ERROR;
handle_store_error:
__asm__ __volatile__ ("cda_stw_exc:\n");
- d = &__get_cpu_var(exception_data);
- DPRINTF("cda_stw_exc: o_len=%lu fault_addr=%lu o_dst=%lu ret=%lu\n",
- o_len, d->fault_addr, o_dst, o_len - d->fault_addr + o_dst);
- return o_len * 4 - d->fault_addr + o_dst;
+ return PA_MEMCPY_STORE_ERROR;
}
-/* Returns 0 for success, otherwise, returns number of bytes not transferred. */
-static unsigned long pa_memcpy(void *dstp, const void *srcp, unsigned long len)
+/* Returns PA_MEMCPY_OK, PA_MEMCPY_LOAD_ERROR or PA_MEMCPY_STORE_ERROR.
+ * In case of an access fault the faulty address can be read from the per_cpu
+ * exception data struct. */
+static unsigned long pa_memcpy_internal(void *dstp, const void *srcp,
+ unsigned long len)
{
register unsigned long src, dst, t1, t2, t3;
register unsigned char *pcs, *pcd;
register unsigned int *pws, *pwd;
register double *pds, *pdd;
- unsigned long ret = 0;
- unsigned long o_dst, o_src, o_len;
- struct exception_data *d;
+ unsigned long ret;
src = (unsigned long)srcp;
dst = (unsigned long)dstp;
pcs = (unsigned char *)srcp;
pcd = (unsigned char *)dstp;
- o_dst = dst; o_src = src; o_len = len;
-
/* prefetch_src((const void *)srcp); */
if (len < THRESHOLD)
@@ -401,7 +399,7 @@ byte_copy:
len--;
}
- return 0;
+ return PA_MEMCPY_OK;
unaligned_copy:
/* possibly we are aligned on a word, but not on a double... */
@@ -438,8 +436,7 @@ unaligned_copy:
src = (unsigned long)pcs;
}
- ret = copy_dstaligned(dst, src, len / sizeof(unsigned int),
- o_dst, o_src, o_len);
+ ret = copy_dstaligned(dst, src, len / sizeof(unsigned int));
if (ret)
return ret;
@@ -454,17 +451,41 @@ unaligned_copy:
handle_load_error:
__asm__ __volatile__ ("pmc_load_exc:\n");
- d = &__get_cpu_var(exception_data);
- DPRINTF("pmc_load_exc: o_len=%lu fault_addr=%lu o_src=%lu ret=%lu\n",
- o_len, d->fault_addr, o_src, o_len - d->fault_addr + o_src);
- return o_len - d->fault_addr + o_src;
+ return PA_MEMCPY_LOAD_ERROR;
handle_store_error:
__asm__ __volatile__ ("pmc_store_exc:\n");
+ return PA_MEMCPY_STORE_ERROR;
+}
+
+
+/* Returns 0 for success, otherwise, returns number of bytes not transferred. */
+static unsigned long pa_memcpy(void *dstp, const void *srcp, unsigned long len)
+{
+ unsigned long ret, fault_addr, reference;
+ struct exception_data *d;
+
+ ret = pa_memcpy_internal(dstp, srcp, len);
+ if (likely(ret == PA_MEMCPY_OK))
+ return 0;
+
+ /* if a load or store fault occured we can get the faulty addr */
d = &__get_cpu_var(exception_data);
- DPRINTF("pmc_store_exc: o_len=%lu fault_addr=%lu o_dst=%lu ret=%lu\n",
- o_len, d->fault_addr, o_dst, o_len - d->fault_addr + o_dst);
- return o_len - d->fault_addr + o_dst;
+ fault_addr = d->fault_addr;
+
+ /* error in load or store? */
+ if (ret == PA_MEMCPY_LOAD_ERROR)
+ reference = (unsigned long) srcp;
+ else
+ reference = (unsigned long) dstp;
+
+ DPRINTF("pa_memcpy: fault type = %lu, len=%lu fault_addr=%lu ref=%lu\n",
+ ret, len, fault_addr, reference);
+
+ if (fault_addr >= reference)
+ return len - (fault_addr - reference);
+ else
+ return len;
}
#ifdef __KERNEL__