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-rw-r--r--arch/parisc/lib/Makefile3
-rw-r--r--arch/parisc/lib/bitops.c3
-rw-r--r--arch/parisc/lib/delay.c73
-rw-r--r--arch/parisc/lib/iomap.c24
-rw-r--r--arch/parisc/lib/lusercopy.S51
-rw-r--r--arch/parisc/lib/memcpy.c98
-rw-r--r--arch/parisc/lib/ucmpdi2.c25
7 files changed, 171 insertions, 106 deletions
diff --git a/arch/parisc/lib/Makefile b/arch/parisc/lib/Makefile
index 5f2e6904d14..8fa92b8d839 100644
--- a/arch/parisc/lib/Makefile
+++ b/arch/parisc/lib/Makefile
@@ -2,6 +2,7 @@
# Makefile for parisc-specific library files
#
-lib-y := lusercopy.o bitops.o checksum.o io.o memset.o fixup.o memcpy.o
+lib-y := lusercopy.o bitops.o checksum.o io.o memset.o fixup.o memcpy.o \
+ ucmpdi2.o delay.o
obj-y := iomap.o
diff --git a/arch/parisc/lib/bitops.c b/arch/parisc/lib/bitops.c
index 353963d4205..187118841af 100644
--- a/arch/parisc/lib/bitops.c
+++ b/arch/parisc/lib/bitops.c
@@ -8,8 +8,7 @@
#include <linux/kernel.h>
#include <linux/spinlock.h>
-#include <asm/system.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
#ifdef CONFIG_SMP
arch_spinlock_t __atomic_hash[ATOMIC_HASH_SIZE] __lock_aligned = {
diff --git a/arch/parisc/lib/delay.c b/arch/parisc/lib/delay.c
new file mode 100644
index 00000000000..ec9255f27a8
--- /dev/null
+++ b/arch/parisc/lib/delay.c
@@ -0,0 +1,73 @@
+/*
+ * Precise Delay Loops for parisc
+ *
+ * based on code by:
+ * Copyright (C) 1993 Linus Torvalds
+ * Copyright (C) 1997 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
+ * Copyright (C) 2008 Jiri Hladky <hladky _dot_ jiri _at_ gmail _dot_ com>
+ *
+ * parisc implementation:
+ * Copyright (C) 2013 Helge Deller <deller@gmx.de>
+ */
+
+
+#include <linux/module.h>
+#include <linux/preempt.h>
+#include <linux/init.h>
+
+#include <asm/processor.h>
+#include <asm/delay.h>
+
+#include <asm/special_insns.h> /* for mfctl() */
+#include <asm/processor.h> /* for boot_cpu_data */
+
+/* CR16 based delay: */
+static void __cr16_delay(unsigned long __loops)
+{
+ /*
+ * Note: Due to unsigned math, cr16 rollovers shouldn't be
+ * a problem here. However, on 32 bit, we need to make sure
+ * we don't pass in too big a value. The current default
+ * value of MAX_UDELAY_MS should help prevent this.
+ */
+ u32 bclock, now, loops = __loops;
+ int cpu;
+
+ preempt_disable();
+ cpu = smp_processor_id();
+ bclock = mfctl(16);
+ for (;;) {
+ now = mfctl(16);
+ if ((now - bclock) >= loops)
+ break;
+
+ /* Allow RT tasks to run */
+ preempt_enable();
+ asm volatile(" nop\n");
+ barrier();
+ preempt_disable();
+
+ /*
+ * It is possible that we moved to another CPU, and
+ * since CR16's are per-cpu we need to calculate
+ * that. The delay must guarantee that we wait "at
+ * least" the amount of time. Being moved to another
+ * CPU could make the wait longer but we just need to
+ * make sure we waited long enough. Rebalance the
+ * counter for this CPU.
+ */
+ if (unlikely(cpu != smp_processor_id())) {
+ loops -= (now - bclock);
+ cpu = smp_processor_id();
+ bclock = mfctl(16);
+ }
+ }
+ preempt_enable();
+}
+
+
+void __udelay(unsigned long usecs)
+{
+ __cr16_delay(usecs * ((unsigned long)boot_cpu_data.cpu_hz / 1000000UL));
+}
+EXPORT_SYMBOL(__udelay);
diff --git a/arch/parisc/lib/iomap.c b/arch/parisc/lib/iomap.c
index 5069e8b2ca7..fb8e10a4fb3 100644
--- a/arch/parisc/lib/iomap.c
+++ b/arch/parisc/lib/iomap.c
@@ -5,6 +5,7 @@
#include <linux/ioport.h>
#include <linux/pci.h>
+#include <linux/export.h>
#include <asm/io.h>
/*
@@ -435,28 +436,6 @@ void ioport_unmap(void __iomem *addr)
}
}
-/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
-void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
-{
- resource_size_t start = pci_resource_start(dev, bar);
- resource_size_t len = pci_resource_len(dev, bar);
- unsigned long flags = pci_resource_flags(dev, bar);
-
- if (!len || !start)
- return NULL;
- if (maxlen && len > maxlen)
- len = maxlen;
- if (flags & IORESOURCE_IO)
- return ioport_map(start, len);
- if (flags & IORESOURCE_MEM) {
- if (flags & IORESOURCE_CACHEABLE)
- return ioremap(start, len);
- return ioremap_nocache(start, len);
- }
- /* What? */
- return NULL;
-}
-
void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
{
if (!INDIRECT_ADDR(addr)) {
@@ -482,5 +461,4 @@ EXPORT_SYMBOL(iowrite16_rep);
EXPORT_SYMBOL(iowrite32_rep);
EXPORT_SYMBOL(ioport_map);
EXPORT_SYMBOL(ioport_unmap);
-EXPORT_SYMBOL(pci_iomap);
EXPORT_SYMBOL(pci_iounmap);
diff --git a/arch/parisc/lib/lusercopy.S b/arch/parisc/lib/lusercopy.S
index 1bd23ccec17..a512f07d4fe 100644
--- a/arch/parisc/lib/lusercopy.S
+++ b/arch/parisc/lib/lusercopy.S
@@ -61,47 +61,6 @@
.endm
/*
- * long lstrncpy_from_user(char *dst, const char *src, long n)
- *
- * Returns -EFAULT if exception before terminator,
- * N if the entire buffer filled,
- * otherwise strlen (i.e. excludes zero byte)
- */
-
-ENTRY(lstrncpy_from_user)
- .proc
- .callinfo NO_CALLS
- .entry
- comib,= 0,%r24,$lsfu_done
- copy %r24,%r23
- get_sr
-1: ldbs,ma 1(%sr1,%r25),%r1
-$lsfu_loop:
- stbs,ma %r1,1(%r26)
- comib,=,n 0,%r1,$lsfu_done
- addib,<>,n -1,%r24,$lsfu_loop
-2: ldbs,ma 1(%sr1,%r25),%r1
-$lsfu_done:
- sub %r23,%r24,%r28
-$lsfu_exit:
- bv %r0(%r2)
- nop
- .exit
-ENDPROC(lstrncpy_from_user)
-
- .section .fixup,"ax"
-3: fixup_branch $lsfu_exit
- ldi -EFAULT,%r28
- .previous
-
- .section __ex_table,"aw"
- ASM_ULONG_INSN 1b,3b
- ASM_ULONG_INSN 2b,3b
- .previous
-
- .procend
-
- /*
* unsigned long lclear_user(void *to, unsigned long n)
*
* Returns 0 for success.
@@ -129,9 +88,7 @@ ENDPROC(lclear_user)
ldo 1(%r25),%r25
.previous
- .section __ex_table,"aw"
- ASM_ULONG_INSN 1b,2b
- .previous
+ ASM_EXCEPTIONTABLE_ENTRY(1b,2b)
.procend
@@ -170,10 +127,8 @@ ENDPROC(lstrnlen_user)
copy %r24,%r26 /* reset r26 so 0 is returned on fault */
.previous
- .section __ex_table,"aw"
- ASM_ULONG_INSN 1b,3b
- ASM_ULONG_INSN 2b,3b
- .previous
+ ASM_EXCEPTIONTABLE_ENTRY(1b,3b)
+ ASM_EXCEPTIONTABLE_ENTRY(2b,3b)
.procend
diff --git a/arch/parisc/lib/memcpy.c b/arch/parisc/lib/memcpy.c
index 1dbca5c31b3..b2b441b3234 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
@@ -55,7 +56,7 @@
#ifdef __KERNEL__
#include <linux/module.h>
#include <linux/compiler.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#define s_space "%%sr1"
#define d_space "%%sr2"
#else
@@ -68,7 +69,7 @@
DECLARE_PER_CPU(struct exception_data, exception_data);
#define preserve_branch(label) do { \
- volatile int dummy; \
+ volatile int dummy = 0; \
/* The following branch is never taken, it's just here to */ \
/* prevent gcc from optimizing away our exception code. */ \
if (unlikely(dummy != dummy)) \
@@ -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 noinline 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 noinline 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");
- 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;
+ 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 = this_cpu_ptr(&exception_data);
+ 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__
@@ -503,4 +524,17 @@ EXPORT_SYMBOL(copy_to_user);
EXPORT_SYMBOL(copy_from_user);
EXPORT_SYMBOL(copy_in_user);
EXPORT_SYMBOL(memcpy);
+
+long probe_kernel_read(void *dst, const void *src, size_t size)
+{
+ unsigned long addr = (unsigned long)src;
+
+ if (addr < PAGE_SIZE)
+ return -EFAULT;
+
+ /* check for I/O space F_EXTEND(0xfff00000) access as well? */
+
+ return __probe_kernel_read(dst, src, size);
+}
+
#endif
diff --git a/arch/parisc/lib/ucmpdi2.c b/arch/parisc/lib/ucmpdi2.c
new file mode 100644
index 00000000000..149c016f32c
--- /dev/null
+++ b/arch/parisc/lib/ucmpdi2.c
@@ -0,0 +1,25 @@
+#include <linux/module.h>
+
+union ull_union {
+ unsigned long long ull;
+ struct {
+ unsigned int high;
+ unsigned int low;
+ } ui;
+};
+
+int __ucmpdi2(unsigned long long a, unsigned long long b)
+{
+ union ull_union au = {.ull = a};
+ union ull_union bu = {.ull = b};
+
+ if (au.ui.high < bu.ui.high)
+ return 0;
+ else if (au.ui.high > bu.ui.high)
+ return 2;
+ if (au.ui.low < bu.ui.low)
+ return 0;
+ else if (au.ui.low > bu.ui.low)
+ return 2;
+ return 1;
+}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 13:20:32 +0000