* [PATCH 05/27] score: create head files cache.h cacheflush.h checksum.h cputime.h current.h
@ 2009-06-09 6:25 ` liqin.chen
0 siblings, 0 replies; 6+ messages in thread
From: liqin.chen @ 2009-06-09 6:25 UTC (permalink / raw)
To: linux-arch, linux-kernel; +Cc: Arnd Bergmann, Andrew Morton, torvalds
>From 5e295ae34254dbb13418020df52a67934ec08f9a Mon Sep 17 00:00:00 2001
From: Chen Liqin <liqin.chen@sunplusct.com>
Date: Tue, 9 Jun 2009 13:43:07 +0800
Signed-off-by: Chen Liqin <liqin.chen@sunplusct.com>
---
arch/score/include/asm/cache.h | 7 +
arch/score/include/asm/cacheflush.h | 47 +++++++
arch/score/include/asm/checksum.h | 235
+++++++++++++++++++++++++++++++++++
arch/score/include/asm/cputime.h | 6 +
arch/score/include/asm/current.h | 15 +++
5 files changed, 310 insertions(+), 0 deletions(-)
create mode 100644 arch/score/include/asm/cache.h
create mode 100644 arch/score/include/asm/cacheflush.h
create mode 100644 arch/score/include/asm/checksum.h
create mode 100644 arch/score/include/asm/cputime.h
create mode 100644 arch/score/include/asm/current.h
diff --git a/arch/score/include/asm/cache.h
b/arch/score/include/asm/cache.h
new file mode 100644
index 0000000..ae3d59f
--- /dev/null
+++ b/arch/score/include/asm/cache.h
@@ -0,0 +1,7 @@
+#ifndef _ASM_SCORE_CACHE_H
+#define _ASM_SCORE_CACHE_H
+
+#define L1_CACHE_SHIFT 4
+#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
+
+#endif /* _ASM_SCORE_CACHE_H */
diff --git a/arch/score/include/asm/cacheflush.h
b/arch/score/include/asm/cacheflush.h
new file mode 100644
index 0000000..1c74628
--- /dev/null
+++ b/arch/score/include/asm/cacheflush.h
@@ -0,0 +1,47 @@
+#ifndef _ASM_SCORE_CACHEFLUSH_H
+#define _ASM_SCORE_CACHEFLUSH_H
+
+/* Keep includes the same across arches. */
+#include <linux/mm.h>
+
+extern void (*flush_cache_all)(void);
+extern void (*flush_cache_mm)(struct mm_struct *mm);
+extern void (*flush_cache_range)(struct vm_area_struct *vma,
+ unsigned long start, unsigned long end);
+extern void (*flush_cache_page)(struct vm_area_struct *vma,
+ unsigned long page, unsigned long pfn);
+extern void (*flush_cache_sigtramp)(unsigned long addr);
+extern void (*flush_icache_all)(void);
+extern void (*flush_icache_range)(unsigned long start, unsigned long
end);
+extern void (*flush_data_cache_page)(unsigned long addr);
+
+extern void s7_flush_cache_all(void);
+
+#define flush_cache_dup_mm(mm) do {} while (0)
+#define flush_dcache_page(page) do {} while (0)
+#define flush_dcache_mmap_lock(mapping) do {} while (0)
+#define flush_dcache_mmap_unlock(mapping) do {} while (0)
+#define flush_cache_vmap(start, end) do {} while (0)
+#define flush_cache_vunmap(start, end) do {} while (0)
+
+static inline void flush_icache_page(struct vm_area_struct *vma,
+ struct page *page)
+{
+ if (vma->vm_flags & VM_EXEC) {
+ void *v = page_address(page);
+ flush_icache_range((unsigned long) v,
+ (unsigned long) v + PAGE_SIZE);
+ }
+}
+
+#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
+ memcpy(dst, src, len)
+
+#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
+ do { \
+ memcpy(dst, src, len); \
+ if ((vma->vm_flags & VM_EXEC)) \
+ flush_cache_page(vma, vaddr, page_to_pfn(page));\
+ } while (0)
+
+#endif /* _ASM_SCORE_CACHEFLUSH_H */
diff --git a/arch/score/include/asm/checksum.h
b/arch/score/include/asm/checksum.h
new file mode 100644
index 0000000..f909ac3
--- /dev/null
+++ b/arch/score/include/asm/checksum.h
@@ -0,0 +1,235 @@
+#ifndef _ASM_SCORE_CHECKSUM_H
+#define _ASM_SCORE_CHECKSUM_H
+
+#include <linux/in6.h>
+#include <asm/uaccess.h>
+
+/*
+ * computes the checksum of a memory block at buff, length len,
+ * and adds in "sum" (32-bit)
+ *
+ * returns a 32-bit number suitable for feeding into itself
+ * or csum_tcpudp_magic
+ *
+ * this function must be called with even lengths, except
+ * for the last fragment, which may be odd
+ *
+ * it's best to have buff aligned on a 32-bit boundary
+ */
+unsigned int csum_partial(const void *buff, int len, __wsum sum);
+unsigned int csum_partial_copy_from_user(const char *src, char *dst, int
len,
+ unsigned int sum, int *csum_err);
+unsigned int csum_partial_copy(const char *src, char *dst,
+ int len, unsigned int sum);
+
+/*
+ * this is a new version of the above that records errors it finds in
*errp,
+ * but continues and zeros the rest of the buffer.
+ */
+
+/*
+ * Copy and checksum to user
+ */
+#define HAVE_CSUM_COPY_USER
+static inline
+__wsum csum_and_copy_to_user(const void *src, void __user *dst, int len,
+ __wsum sum, int *err_ptr)
+{
+ sum = csum_partial(src, len, sum);
+ if (copy_to_user(dst, src, len)) {
+ *err_ptr = -EFAULT;
+ return (__force __wsum) -1; /* invalid checksum */
+ }
+ return sum;
+}
+
+
+#define csum_partial_copy_nocheck csum_partial_copy
+/*
+ * Fold a partial checksum without adding pseudo headers
+ */
+
+static inline __sum16 csum_fold(__wsum sum)
+{
+ /* the while loop is unnecessary really, it's always enough with
two
+ iterations */
+ __asm__ __volatile__(
+ ".set volatile\n\t"
+ ".set\tr1\n\t"
+ "slli\tr1,%0, 16\n\t"
+ "add\t%0,%0, r1\n\t"
+ "cmp.c\tr1, %0\n\t"
+ "srli\t%0, %0, 16\n\t"
+ "bleu\t1f\n\t"
+ "addi\t%0, 0x1\n\t"
+ "1:ldi\tr30, 0xffff\n\t"
+ "xor\t%0, %0, r30\n\t"
+ "slli\t%0, %0, 16\n\t"
+ "srli\t%0, %0, 16\n\t"
+ ".set\tnor1\n\t"
+ ".set optimize\n\t"
+ : "=r" (sum)
+ : "0" (sum));
+ return sum;
+}
+
+/*
+ * This is a version of ip_compute_csum() optimized for IP headers,
+ * which always checksum on 4 octet boundaries.
+ *
+ * By Jorge Cwik <jorge@laser.satlink.net>, adapted for linux by
+ * Arnt Gulbrandsen.
+ */
+static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
+{
+ unsigned int sum;
+ unsigned long dummy;
+
+ __asm__ __volatile__(
+ ".set volatile\n\t"
+ ".set\tnor1\n\t"
+ "lw\t%0, [%1]\n\t"
+ "subri\t%2, %2, 4\n\t"
+ "slli\t%2, %2, 2\n\t"
+ "lw\t%3, [%1, 4]\n\t"
+ "add\t%2, %2, %1\n\t"
+ "add\t%0, %0, %3\n\t"
+ "cmp.c\t%3, %0\n\t"
+ "lw\t%3, [%1, 8]\n\t"
+ "bleu\t1f\n\t"
+ "addi\t%0, 0x1\n\t"
+ "1:\n\t"
+ "add\t%0, %0, %3\n\t"
+ "cmp.c\t%3, %0\n\t"
+ "lw\t%3, [%1, 12]\n\t"
+ "bleu\t1f\n\t"
+ "addi\t%0, 0x1\n\t"
+ "1:add\t%0, %0, %3\n\t"
+ "cmp.c\t%3, %0\n\t"
+ "bleu\t1f\n\t"
+ "addi\t%0, 0x1\n"
+
+ "1:\tlw\t%3, [%1, 16]\n\t"
+ "addi\t%1, 4\n\t"
+ "add\t%0, %0, %3\n\t"
+ "cmp.c\t%3, %0\n\t"
+ "bleu\t2f\n\t"
+ "addi\t%0, 0x1\n"
+ "2:cmp.c\t%2, %1\n\t"
+ "bne\t1b\n\t"
+
+ ".set\tr1\n\t"
+ ".set optimize\n\t"
+ : "=&r" (sum), "=&r" (iph), "=&r" (ihl), "=&r" (dummy)
+ : "1" (iph), "2" (ihl));
+
+ return csum_fold(sum);
+}
+
+static inline __wsum
+csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
+ unsigned short proto, __wsum sum)
+{
+ unsigned long tmp = (ntohs(len) << 16) + proto * 256;
+ __asm__ __volatile__(
+ ".set volatile\n\t"
+ "add\t%0, %0, %2\n\t"
+ "cmp.c\t%2, %0\n\t"
+ "bleu\t1f\n\t"
+ "addi\t%0, 0x1\n\t"
+ "1:\n\t"
+ "add\t%0, %0, %3\n\t"
+ "cmp.c\t%3, %0\n\t"
+ "bleu\t1f\n\t"
+ "addi\t%0, 0x1\n\t"
+ "1:\n\t"
+ "add\t%0, %0, %4\n\t"
+ "cmp.c\t%4, %0\n\t"
+ "bleu\t1f\n\t"
+ "addi\t%0, 0x1\n\t"
+ "1:\n\t"
+ ".set optimize\n\t"
+ : "=r" (sum)
+ : "0" (daddr), "r"(saddr),
+ "r" (tmp),
+ "r" (sum));
+ return sum;
+}
+
+/*
+ * computes the checksum of the TCP/UDP pseudo-header
+ * returns a 16-bit checksum, already complemented
+ */
+static inline __sum16
+csum_tcpudp_magic(__be32 saddr, __be32 daddr, unsigned short len,
+ unsigned short proto, __wsum sum)
+{
+ return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto,
sum));
+}
+
+/*
+ * this routine is used for miscellaneous IP-like checksums, mainly
+ * in icmp.c
+ */
+
+static inline unsigned short ip_compute_csum(const void *buff, int len)
+{
+ return csum_fold(csum_partial(buff, len, 0));
+}
+
+#define _HAVE_ARCH_IPV6_CSUM
+static inline __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
+ const struct in6_addr *daddr,
+ __u32 len, unsigned short proto,
+ __wsum sum)
+{
+ __asm__ __volatile__(
+ ".set\tnoreorder\t\t\t# csum_ipv6_magic\n\t"
+ ".set\tnoat\n\t"
+ "addu\t%0, %5\t\t\t# proto (long in network byte
order)\n\t"
+ "sltu\t$1, %0, %5\n\t"
+ "addu\t%0, $1\n\t"
+ "addu\t%0, %6\t\t\t# csum\n\t"
+ "sltu\t$1, %0, %6\n\t"
+ "lw\t%1, 0(%2)\t\t\t# four words source address\n\t"
+ "addu\t%0, $1\n\t"
+ "addu\t%0, %1\n\t"
+ "sltu\t$1, %0, %1\n\t"
+ "lw\t%1, 4(%2)\n\t"
+ "addu\t%0, $1\n\t"
+ "addu\t%0, %1\n\t"
+ "sltu\t$1, %0, %1\n\t"
+ "lw\t%1, 8(%2)\n\t"
+ "addu\t%0, $1\n\t"
+ "addu\t%0, %1\n\t"
+ "sltu\t$1, %0, %1\n\t"
+ "lw\t%1, 12(%2)\n\t"
+ "addu\t%0, $1\n\t"
+ "addu\t%0, %1\n\t"
+ "sltu\t$1, %0, %1\n\t"
+ "lw\t%1, 0(%3)\n\t"
+ "addu\t%0, $1\n\t"
+ "addu\t%0, %1\n\t"
+ "sltu\t$1, %0, %1\n\t"
+ "lw\t%1, 4(%3)\n\t"
+ "addu\t%0, $1\n\t"
+ "addu\t%0, %1\n\t"
+ "sltu\t$1, %0, %1\n\t"
+ "lw\t%1, 8(%3)\n\t"
+ "addu\t%0, $1\n\t"
+ "addu\t%0, %1\n\t"
+ "sltu\t$1, %0, %1\n\t"
+ "lw\t%1, 12(%3)\n\t"
+ "addu\t%0, $1\n\t"
+ "addu\t%0, %1\n\t"
+ "sltu\t$1, %0, %1\n\t"
+ "addu\t%0, $1\t\t\t# Add final carry\n\t"
+ ".set\tnoat\n\t"
+ ".set\tnoreorder"
+ : "=r" (sum), "=r" (proto)
+ : "r" (saddr), "r" (daddr),
+ "0" (htonl(len)), "1" (htonl(proto)), "r" (sum));
+
+ return csum_fold(sum);
+}
+#endif /* _ASM_SCORE_CHECKSUM_H */
diff --git a/arch/score/include/asm/cputime.h
b/arch/score/include/asm/cputime.h
new file mode 100644
index 0000000..1fced99
--- /dev/null
+++ b/arch/score/include/asm/cputime.h
@@ -0,0 +1,6 @@
+#ifndef _ASM_SCORE_CPUTIME_H
+#define _ASM_SCORE_CPUTIME_H
+
+#include <asm-generic/cputime.h>
+
+#endif /* _ASM_SCORE_CPUTIME_H */
diff --git a/arch/score/include/asm/current.h
b/arch/score/include/asm/current.h
new file mode 100644
index 0000000..91de710
--- /dev/null
+++ b/arch/score/include/asm/current.h
@@ -0,0 +1,15 @@
+#ifndef _ASM_SCORE_CURRENT_H
+#define _ASM_SCORE_CURRENT_H
+
+#include <linux/thread_info.h>
+
+struct task_struct;
+
+static inline struct task_struct *get_current(void)
+{
+ return current_thread_info()->task;
+}
+
+#define current get_current()
+
+#endif /* _ASM_SCORE_CURRENT_H */
--
1.6.2
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH 05/27] score: create head files cache.h cacheflush.h checksum.h cputime.h current.h
@ 2009-06-09 6:25 ` liqin.chen
0 siblings, 0 replies; 6+ messages in thread
From: liqin.chen @ 2009-06-09 6:25 UTC (permalink / raw)
To: linux-arch, linux-kernel; +Cc: Arnd Bergmann, Andrew Morton, torvalds
From 5e295ae34254dbb13418020df52a67934ec08f9a Mon Sep 17 00:00:00 2001
From: Chen Liqin <liqin.chen@sunplusct.com>
Date: Tue, 9 Jun 2009 13:43:07 +0800
Signed-off-by: Chen Liqin <liqin.chen@sunplusct.com>
---
arch/score/include/asm/cache.h | 7 +
arch/score/include/asm/cacheflush.h | 47 +++++++
arch/score/include/asm/checksum.h | 235
+++++++++++++++++++++++++++++++++++
arch/score/include/asm/cputime.h | 6 +
arch/score/include/asm/current.h | 15 +++
5 files changed, 310 insertions(+), 0 deletions(-)
create mode 100644 arch/score/include/asm/cache.h
create mode 100644 arch/score/include/asm/cacheflush.h
create mode 100644 arch/score/include/asm/checksum.h
create mode 100644 arch/score/include/asm/cputime.h
create mode 100644 arch/score/include/asm/current.h
diff --git a/arch/score/include/asm/cache.h
b/arch/score/include/asm/cache.h
new file mode 100644
index 0000000..ae3d59f
--- /dev/null
+++ b/arch/score/include/asm/cache.h
@@ -0,0 +1,7 @@
+#ifndef _ASM_SCORE_CACHE_H
+#define _ASM_SCORE_CACHE_H
+
+#define L1_CACHE_SHIFT 4
+#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
+
+#endif /* _ASM_SCORE_CACHE_H */
diff --git a/arch/score/include/asm/cacheflush.h
b/arch/score/include/asm/cacheflush.h
new file mode 100644
index 0000000..1c74628
--- /dev/null
+++ b/arch/score/include/asm/cacheflush.h
@@ -0,0 +1,47 @@
+#ifndef _ASM_SCORE_CACHEFLUSH_H
+#define _ASM_SCORE_CACHEFLUSH_H
+
+/* Keep includes the same across arches. */
+#include <linux/mm.h>
+
+extern void (*flush_cache_all)(void);
+extern void (*flush_cache_mm)(struct mm_struct *mm);
+extern void (*flush_cache_range)(struct vm_area_struct *vma,
+ unsigned long start, unsigned long end);
+extern void (*flush_cache_page)(struct vm_area_struct *vma,
+ unsigned long page, unsigned long pfn);
+extern void (*flush_cache_sigtramp)(unsigned long addr);
+extern void (*flush_icache_all)(void);
+extern void (*flush_icache_range)(unsigned long start, unsigned long
end);
+extern void (*flush_data_cache_page)(unsigned long addr);
+
+extern void s7_flush_cache_all(void);
+
+#define flush_cache_dup_mm(mm) do {} while (0)
+#define flush_dcache_page(page) do {} while (0)
+#define flush_dcache_mmap_lock(mapping) do {} while (0)
+#define flush_dcache_mmap_unlock(mapping) do {} while (0)
+#define flush_cache_vmap(start, end) do {} while (0)
+#define flush_cache_vunmap(start, end) do {} while (0)
+
+static inline void flush_icache_page(struct vm_area_struct *vma,
+ struct page *page)
+{
+ if (vma->vm_flags & VM_EXEC) {
+ void *v = page_address(page);
+ flush_icache_range((unsigned long) v,
+ (unsigned long) v + PAGE_SIZE);
+ }
+}
+
+#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
+ memcpy(dst, src, len)
+
+#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
+ do { \
+ memcpy(dst, src, len); \
+ if ((vma->vm_flags & VM_EXEC)) \
+ flush_cache_page(vma, vaddr, page_to_pfn(page));\
+ } while (0)
+
+#endif /* _ASM_SCORE_CACHEFLUSH_H */
diff --git a/arch/score/include/asm/checksum.h
b/arch/score/include/asm/checksum.h
new file mode 100644
index 0000000..f909ac3
--- /dev/null
+++ b/arch/score/include/asm/checksum.h
@@ -0,0 +1,235 @@
+#ifndef _ASM_SCORE_CHECKSUM_H
+#define _ASM_SCORE_CHECKSUM_H
+
+#include <linux/in6.h>
+#include <asm/uaccess.h>
+
+/*
+ * computes the checksum of a memory block at buff, length len,
+ * and adds in "sum" (32-bit)
+ *
+ * returns a 32-bit number suitable for feeding into itself
+ * or csum_tcpudp_magic
+ *
+ * this function must be called with even lengths, except
+ * for the last fragment, which may be odd
+ *
+ * it's best to have buff aligned on a 32-bit boundary
+ */
+unsigned int csum_partial(const void *buff, int len, __wsum sum);
+unsigned int csum_partial_copy_from_user(const char *src, char *dst, int
len,
+ unsigned int sum, int *csum_err);
+unsigned int csum_partial_copy(const char *src, char *dst,
+ int len, unsigned int sum);
+
+/*
+ * this is a new version of the above that records errors it finds in
*errp,
+ * but continues and zeros the rest of the buffer.
+ */
+
+/*
+ * Copy and checksum to user
+ */
+#define HAVE_CSUM_COPY_USER
+static inline
+__wsum csum_and_copy_to_user(const void *src, void __user *dst, int len,
+ __wsum sum, int *err_ptr)
+{
+ sum = csum_partial(src, len, sum);
+ if (copy_to_user(dst, src, len)) {
+ *err_ptr = -EFAULT;
+ return (__force __wsum) -1; /* invalid checksum */
+ }
+ return sum;
+}
+
+
+#define csum_partial_copy_nocheck csum_partial_copy
+/*
+ * Fold a partial checksum without adding pseudo headers
+ */
+
+static inline __sum16 csum_fold(__wsum sum)
+{
+ /* the while loop is unnecessary really, it's always enough with
two
+ iterations */
+ __asm__ __volatile__(
+ ".set volatile\n\t"
+ ".set\tr1\n\t"
+ "slli\tr1,%0, 16\n\t"
+ "add\t%0,%0, r1\n\t"
+ "cmp.c\tr1, %0\n\t"
+ "srli\t%0, %0, 16\n\t"
+ "bleu\t1f\n\t"
+ "addi\t%0, 0x1\n\t"
+ "1:ldi\tr30, 0xffff\n\t"
+ "xor\t%0, %0, r30\n\t"
+ "slli\t%0, %0, 16\n\t"
+ "srli\t%0, %0, 16\n\t"
+ ".set\tnor1\n\t"
+ ".set optimize\n\t"
+ : "=r" (sum)
+ : "0" (sum));
+ return sum;
+}
+
+/*
+ * This is a version of ip_compute_csum() optimized for IP headers,
+ * which always checksum on 4 octet boundaries.
+ *
+ * By Jorge Cwik <jorge@laser.satlink.net>, adapted for linux by
+ * Arnt Gulbrandsen.
+ */
+static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
+{
+ unsigned int sum;
+ unsigned long dummy;
+
+ __asm__ __volatile__(
+ ".set volatile\n\t"
+ ".set\tnor1\n\t"
+ "lw\t%0, [%1]\n\t"
+ "subri\t%2, %2, 4\n\t"
+ "slli\t%2, %2, 2\n\t"
+ "lw\t%3, [%1, 4]\n\t"
+ "add\t%2, %2, %1\n\t"
+ "add\t%0, %0, %3\n\t"
+ "cmp.c\t%3, %0\n\t"
+ "lw\t%3, [%1, 8]\n\t"
+ "bleu\t1f\n\t"
+ "addi\t%0, 0x1\n\t"
+ "1:\n\t"
+ "add\t%0, %0, %3\n\t"
+ "cmp.c\t%3, %0\n\t"
+ "lw\t%3, [%1, 12]\n\t"
+ "bleu\t1f\n\t"
+ "addi\t%0, 0x1\n\t"
+ "1:add\t%0, %0, %3\n\t"
+ "cmp.c\t%3, %0\n\t"
+ "bleu\t1f\n\t"
+ "addi\t%0, 0x1\n"
+
+ "1:\tlw\t%3, [%1, 16]\n\t"
+ "addi\t%1, 4\n\t"
+ "add\t%0, %0, %3\n\t"
+ "cmp.c\t%3, %0\n\t"
+ "bleu\t2f\n\t"
+ "addi\t%0, 0x1\n"
+ "2:cmp.c\t%2, %1\n\t"
+ "bne\t1b\n\t"
+
+ ".set\tr1\n\t"
+ ".set optimize\n\t"
+ : "=&r" (sum), "=&r" (iph), "=&r" (ihl), "=&r" (dummy)
+ : "1" (iph), "2" (ihl));
+
+ return csum_fold(sum);
+}
+
+static inline __wsum
+csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
+ unsigned short proto, __wsum sum)
+{
+ unsigned long tmp = (ntohs(len) << 16) + proto * 256;
+ __asm__ __volatile__(
+ ".set volatile\n\t"
+ "add\t%0, %0, %2\n\t"
+ "cmp.c\t%2, %0\n\t"
+ "bleu\t1f\n\t"
+ "addi\t%0, 0x1\n\t"
+ "1:\n\t"
+ "add\t%0, %0, %3\n\t"
+ "cmp.c\t%3, %0\n\t"
+ "bleu\t1f\n\t"
+ "addi\t%0, 0x1\n\t"
+ "1:\n\t"
+ "add\t%0, %0, %4\n\t"
+ "cmp.c\t%4, %0\n\t"
+ "bleu\t1f\n\t"
+ "addi\t%0, 0x1\n\t"
+ "1:\n\t"
+ ".set optimize\n\t"
+ : "=r" (sum)
+ : "0" (daddr), "r"(saddr),
+ "r" (tmp),
+ "r" (sum));
+ return sum;
+}
+
+/*
+ * computes the checksum of the TCP/UDP pseudo-header
+ * returns a 16-bit checksum, already complemented
+ */
+static inline __sum16
+csum_tcpudp_magic(__be32 saddr, __be32 daddr, unsigned short len,
+ unsigned short proto, __wsum sum)
+{
+ return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto,
sum));
+}
+
+/*
+ * this routine is used for miscellaneous IP-like checksums, mainly
+ * in icmp.c
+ */
+
+static inline unsigned short ip_compute_csum(const void *buff, int len)
+{
+ return csum_fold(csum_partial(buff, len, 0));
+}
+
+#define _HAVE_ARCH_IPV6_CSUM
+static inline __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
+ const struct in6_addr *daddr,
+ __u32 len, unsigned short proto,
+ __wsum sum)
+{
+ __asm__ __volatile__(
+ ".set\tnoreorder\t\t\t# csum_ipv6_magic\n\t"
+ ".set\tnoat\n\t"
+ "addu\t%0, %5\t\t\t# proto (long in network byte
order)\n\t"
+ "sltu\t$1, %0, %5\n\t"
+ "addu\t%0, $1\n\t"
+ "addu\t%0, %6\t\t\t# csum\n\t"
+ "sltu\t$1, %0, %6\n\t"
+ "lw\t%1, 0(%2)\t\t\t# four words source address\n\t"
+ "addu\t%0, $1\n\t"
+ "addu\t%0, %1\n\t"
+ "sltu\t$1, %0, %1\n\t"
+ "lw\t%1, 4(%2)\n\t"
+ "addu\t%0, $1\n\t"
+ "addu\t%0, %1\n\t"
+ "sltu\t$1, %0, %1\n\t"
+ "lw\t%1, 8(%2)\n\t"
+ "addu\t%0, $1\n\t"
+ "addu\t%0, %1\n\t"
+ "sltu\t$1, %0, %1\n\t"
+ "lw\t%1, 12(%2)\n\t"
+ "addu\t%0, $1\n\t"
+ "addu\t%0, %1\n\t"
+ "sltu\t$1, %0, %1\n\t"
+ "lw\t%1, 0(%3)\n\t"
+ "addu\t%0, $1\n\t"
+ "addu\t%0, %1\n\t"
+ "sltu\t$1, %0, %1\n\t"
+ "lw\t%1, 4(%3)\n\t"
+ "addu\t%0, $1\n\t"
+ "addu\t%0, %1\n\t"
+ "sltu\t$1, %0, %1\n\t"
+ "lw\t%1, 8(%3)\n\t"
+ "addu\t%0, $1\n\t"
+ "addu\t%0, %1\n\t"
+ "sltu\t$1, %0, %1\n\t"
+ "lw\t%1, 12(%3)\n\t"
+ "addu\t%0, $1\n\t"
+ "addu\t%0, %1\n\t"
+ "sltu\t$1, %0, %1\n\t"
+ "addu\t%0, $1\t\t\t# Add final carry\n\t"
+ ".set\tnoat\n\t"
+ ".set\tnoreorder"
+ : "=r" (sum), "=r" (proto)
+ : "r" (saddr), "r" (daddr),
+ "0" (htonl(len)), "1" (htonl(proto)), "r" (sum));
+
+ return csum_fold(sum);
+}
+#endif /* _ASM_SCORE_CHECKSUM_H */
diff --git a/arch/score/include/asm/cputime.h
b/arch/score/include/asm/cputime.h
new file mode 100644
index 0000000..1fced99
--- /dev/null
+++ b/arch/score/include/asm/cputime.h
@@ -0,0 +1,6 @@
+#ifndef _ASM_SCORE_CPUTIME_H
+#define _ASM_SCORE_CPUTIME_H
+
+#include <asm-generic/cputime.h>
+
+#endif /* _ASM_SCORE_CPUTIME_H */
diff --git a/arch/score/include/asm/current.h
b/arch/score/include/asm/current.h
new file mode 100644
index 0000000..91de710
--- /dev/null
+++ b/arch/score/include/asm/current.h
@@ -0,0 +1,15 @@
+#ifndef _ASM_SCORE_CURRENT_H
+#define _ASM_SCORE_CURRENT_H
+
+#include <linux/thread_info.h>
+
+struct task_struct;
+
+static inline struct task_struct *get_current(void)
+{
+ return current_thread_info()->task;
+}
+
+#define current get_current()
+
+#endif /* _ASM_SCORE_CURRENT_H */
--
1.6.2
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH 05/27] score: create head files cache.h cacheflush.h checksum.h cputime.h current.h
2009-06-09 6:25 ` liqin.chen
(?)
@ 2009-06-09 17:07 ` Arnd Bergmann
2009-06-13 6:33 ` liqin.chen
-1 siblings, 1 reply; 6+ messages in thread
From: Arnd Bergmann @ 2009-06-09 17:07 UTC (permalink / raw)
To: liqin.chen; +Cc: linux-arch, linux-kernel, Andrew Morton, torvalds
On Tuesday 09 June 2009, liqin.chen@sunplusct.com wrote:
> diff --git a/arch/score/include/asm/cacheflush.h
> b/arch/score/include/asm/cacheflush.h
> +extern void (*flush_cache_all)(void);
> +extern void (*flush_cache_mm)(struct mm_struct *mm);
> +extern void (*flush_cache_range)(struct vm_area_struct *vma,
> + unsigned long start, unsigned long end);
> +extern void (*flush_cache_page)(struct vm_area_struct *vma,
> + unsigned long page, unsigned long pfn);
> +extern void (*flush_cache_sigtramp)(unsigned long addr);
> +extern void (*flush_icache_all)(void);
> +extern void (*flush_icache_range)(unsigned long start, unsigned long
> end);
> +extern void (*flush_data_cache_page)(unsigned long addr);
This is a somewhat unusual way to express these functions. It seems
that you only have one implementation for each of them, so I wonder
why you keep them as function pointers. Do you plan to add more CPUs
in the future that do these differently?
> --- /dev/null
> +++ b/arch/score/include/asm/current.h
> @@ -0,0 +1,15 @@
> +#ifndef _ASM_SCORE_CURRENT_H
> +#define _ASM_SCORE_CURRENT_H
> +
> +#include <linux/thread_info.h>
> +
> +struct task_struct;
> +
> +static inline struct task_struct *get_current(void)
> +{
> + return current_thread_info()->task;
> +}
> +
> +#define current get_current()
> +
> +#endif /* _ASM_SCORE_CURRENT_H */
This is basically the asm-generic version, so you could just use that
instead.
Arnd <><
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH 05/27] score: create head files cache.h cacheflush.h checksum.h cputime.h current.h
2009-06-09 17:07 ` Arnd Bergmann
@ 2009-06-13 6:33 ` liqin.chen
0 siblings, 0 replies; 6+ messages in thread
From: liqin.chen @ 2009-06-13 6:33 UTC (permalink / raw)
To: Arnd Bergmann; +Cc: Andrew Morton, linux-arch, linux-kernel, torvalds
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset="GB2312", Size: 2019 bytes --]
Hi Arnd,
Arnd Bergmann <arnd@arndb.de> дÓÚ 2009-06-10 01:07:16:
> On Tuesday 09 June 2009, liqin.chen@sunplusct.com wrote:
> > diff --git a/arch/score/include/asm/cacheflush.h
> > b/arch/score/include/asm/cacheflush.h
> > +extern void (*flush_cache_all)(void);
> > +extern void (*flush_cache_mm)(struct mm_struct *mm);
> > +extern void (*flush_cache_range)(struct vm_area_struct *vma,
> > + unsigned long start, unsigned long
end);
> > +extern void (*flush_cache_page)(struct vm_area_struct *vma,
> > + unsigned long page, unsigned long
pfn);
> > +extern void (*flush_cache_sigtramp)(unsigned long addr);
> > +extern void (*flush_icache_all)(void);
> > +extern void (*flush_icache_range)(unsigned long start, unsigned long
> > end);
> > +extern void (*flush_data_cache_page)(unsigned long addr);
>
> This is a somewhat unusual way to express these functions. It seems
> that you only have one implementation for each of them, so I wonder
> why you keep them as function pointers. Do you plan to add more CPUs
> in the future that do these differently?
>
S+core series have score7 core and score3 core, they use different ISA,
this patch only include score7 code. We will provide score3 code latter.
> > --- /dev/null
> > +++ b/arch/score/include/asm/current.h
> > @@ -0,0 +1,15 @@
> > +#ifndef _ASM_SCORE_CURRENT_H
> > +#define _ASM_SCORE_CURRENT_H
> > +
> > +#include <linux/thread_info.h>
> > +
> > +struct task_struct;
> > +
> > +static inline struct task_struct *get_current(void)
> > +{
> > + return current_thread_info()->task;
> > +}
> > +
> > +#define current get_current()
> > +
> > +#endif /* _ASM_SCORE_CURRENT_H */
>
> This is basically the asm-generic version, so you could just use that
> instead.
>
Use asm-generic/current.h instead.
Best Regards
Liqin
--
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH 05/27] score: create head files cache.h cacheflush.h checksum.h cputime.h current.h
@ 2009-06-13 6:33 ` liqin.chen
0 siblings, 0 replies; 6+ messages in thread
From: liqin.chen @ 2009-06-13 6:33 UTC (permalink / raw)
To: Arnd Bergmann; +Cc: Andrew Morton, linux-arch, linux-kernel, torvalds
Hi Arnd,
Arnd Bergmann <arnd@arndb.de> 写于 2009-06-10 01:07:16:
> On Tuesday 09 June 2009, liqin.chen@sunplusct.com wrote:
> > diff --git a/arch/score/include/asm/cacheflush.h
> > b/arch/score/include/asm/cacheflush.h
> > +extern void (*flush_cache_all)(void);
> > +extern void (*flush_cache_mm)(struct mm_struct *mm);
> > +extern void (*flush_cache_range)(struct vm_area_struct *vma,
> > + unsigned long start, unsigned long
end);
> > +extern void (*flush_cache_page)(struct vm_area_struct *vma,
> > + unsigned long page, unsigned long
pfn);
> > +extern void (*flush_cache_sigtramp)(unsigned long addr);
> > +extern void (*flush_icache_all)(void);
> > +extern void (*flush_icache_range)(unsigned long start, unsigned long
> > end);
> > +extern void (*flush_data_cache_page)(unsigned long addr);
>
> This is a somewhat unusual way to express these functions. It seems
> that you only have one implementation for each of them, so I wonder
> why you keep them as function pointers. Do you plan to add more CPUs
> in the future that do these differently?
>
S+core series have score7 core and score3 core, they use different ISA,
this patch only include score7 code. We will provide score3 code latter.
> > --- /dev/null
> > +++ b/arch/score/include/asm/current.h
> > @@ -0,0 +1,15 @@
> > +#ifndef _ASM_SCORE_CURRENT_H
> > +#define _ASM_SCORE_CURRENT_H
> > +
> > +#include <linux/thread_info.h>
> > +
> > +struct task_struct;
> > +
> > +static inline struct task_struct *get_current(void)
> > +{
> > + return current_thread_info()->task;
> > +}
> > +
> > +#define current get_current()
> > +
> > +#endif /* _ASM_SCORE_CURRENT_H */
>
> This is basically the asm-generic version, so you could just use that
> instead.
>
Use asm-generic/current.h instead.
Best Regards
Liqin
--
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH 05/27] score: create head files cache.h cacheflush.h checksum.h cputime.h current.h
2009-06-13 6:33 ` liqin.chen
(?)
@ 2009-06-13 22:40 ` Arnd Bergmann
-1 siblings, 0 replies; 6+ messages in thread
From: Arnd Bergmann @ 2009-06-13 22:40 UTC (permalink / raw)
To: liqin.chen; +Cc: Andrew Morton, linux-arch, linux-kernel, torvalds
On Saturday 13 June 2009, liqin.chen@sunplusct.com wrote:
>
> > This is a somewhat unusual way to express these functions. It seems
> > that you only have one implementation for each of them, so I wonder
> > why you keep them as function pointers. Do you plan to add more CPUs
> > in the future that do these differently?
> >
>
> S+core series have score7 core and score3 core, they use different ISA,
> this patch only include score7 code. We will provide score3 code latter.
Ok. Is the ISA similar enough that you still intend to provide binary
kernels that work on both, with just overriding a few functions?
If a kernel gets built only for one architecture or another, a compile-time
switch would be quicker than a runtime switch here.
A common way to express this kind of runtime dependency is to put all
the function pointers into a single data structure and just flip a
single pointer at boot time, e.g.
struct score_cpu_ops {
void (*flush_cache_all)(void);
void (*flush_cache_mm)(struct mm_struct *mm);
void (*flush_cache_range)(struct vm_area_struct *vma,
unsigned long start, unsigned long end);
void (*flush_cache_page)(struct vm_area_struct *vma,
unsigned long page, unsigned long pfn);
void (*flush_cache_sigtramp)(unsigned long addr);
void (*flush_icache_all)(void);
void (*flush_icache_range)(unsigned long start, unsigned long end);
void (*flush_data_cache_page)(unsigned long addr);
};
extern struct score_cpu_ops *score_cpu_ops;
static inline flush_cache_all(void)
{
return score_cpu_ops->flush_cache_all();
}
...
Arnd <><
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2009-06-13 22:40 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2009-06-09 6:25 [PATCH 05/27] score: create head files cache.h cacheflush.h checksum.h cputime.h current.h liqin.chen
2009-06-09 6:25 ` liqin.chen
2009-06-09 17:07 ` Arnd Bergmann
2009-06-13 6:33 ` liqin.chen
2009-06-13 6:33 ` liqin.chen
2009-06-13 22:40 ` Arnd Bergmann
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