Title: [9124] trunk/arch/blackfin: Task[#6243] blackfin:cacheflush: add syscall sys_cacheflush
- Revision
- 9124
- Author
- sonicz
- Date
- 2010-09-06 06:16:04 -0400 (Mon, 06 Sep 2010)
Log Message
Task[#6243] blackfin:cacheflush: add syscall sys_cacheflush
This syscall is for compiler to deal with trampline user code.
Modified Paths
Diff
Modified: trunk/arch/blackfin/include/asm/ptrace.h (9123 => 9124)
--- trunk/arch/blackfin/include/asm/ptrace.h 2010-09-06 07:21:59 UTC (rev 9123)
+++ trunk/arch/blackfin/include/asm/ptrace.h 2010-09-06 10:16:04 UTC (rev 9124)
@@ -113,6 +113,9 @@
/* common code demands this function */
#define ptrace_disable(child) user_disable_single_step(child)
+extern inline int is_user_addr_valid(struct task_struct *child,
+ unsigned long start, unsigned long len);
+
/*
* Get the address of the live pt_regs for the specified task.
* These are saved onto the top kernel stack when the process
Modified: trunk/arch/blackfin/include/asm/unistd.h (9123 => 9124)
--- trunk/arch/blackfin/include/asm/unistd.h 2010-09-06 07:21:59 UTC (rev 9123)
+++ trunk/arch/blackfin/include/asm/unistd.h 2010-09-06 10:16:04 UTC (rev 9124)
@@ -389,8 +389,9 @@
#define __NR_rt_tgsigqueueinfo 368
#define __NR_perf_event_open 369
#define __NR_recvmmsg 370
+#define __NR_cacheflush 371
-#define __NR_syscall 371
+#define __NR_syscall 372
#define NR_syscalls __NR_syscall
/* Old optional stuff no one actually uses */
Modified: trunk/arch/blackfin/kernel/ptrace.c (9123 => 9124)
--- trunk/arch/blackfin/kernel/ptrace.c 2010-09-06 07:21:59 UTC (rev 9123)
+++ trunk/arch/blackfin/kernel/ptrace.c 2010-09-06 10:16:04 UTC (rev 9124)
@@ -114,7 +114,7 @@
/*
* check that an address falls within the bounds of the target process's memory mappings
*/
-static inline int is_user_addr_valid(struct task_struct *child,
+inline int is_user_addr_valid(struct task_struct *child,
unsigned long start, unsigned long len)
{
struct vm_area_struct *vma;
Modified: trunk/arch/blackfin/kernel/sys_bfin.c (9123 => 9124)
--- trunk/arch/blackfin/kernel/sys_bfin.c 2010-09-06 07:21:59 UTC (rev 9123)
+++ trunk/arch/blackfin/kernel/sys_bfin.c 2010-09-06 10:16:04 UTC (rev 9124)
@@ -21,6 +21,8 @@
#include <asm/cacheflush.h>
#include <asm/dma.h>
+#include <asm/cachectl.h>
+#include <asm/ptrace.h>
asmlinkage void *sys_sram_alloc(size_t size, unsigned long flags)
{
@@ -70,3 +72,16 @@
return ret;
}
+
+SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, len, int, op)
+{
+ if (is_user_addr_valid(current, addr, len) == 0) {
+ if (op & DCACHE)
+ blackfin_dcache_flush_range(addr, addr + len);
+ if (op & ICACHE)
+ blackfin_icache_flush_range(addr, addr + len);
+ return 0;
+ }
+
+ return -EINVAL;
+}
Modified: trunk/arch/blackfin/mach-common/entry.S (9123 => 9124)
--- trunk/arch/blackfin/mach-common/entry.S 2010-09-06 07:21:59 UTC (rev 9123)
+++ trunk/arch/blackfin/mach-common/entry.S 2010-09-06 10:16:04 UTC (rev 9124)
@@ -1734,6 +1734,7 @@
.long _sys_rt_tgsigqueueinfo
.long _sys_perf_event_open
.long _sys_recvmmsg /* 370 */
+ .long _sys_cacheflush
.rept NR_syscalls-(.-_sys_call_table)/4
.long _sys_ni_syscall
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