microblaze: Do not use r0_ram space for syscall debugging

Remove syscall counting space from r0_ram. Use special
syscall_debug_table pool for syscall statistic.

Signed-off-by: Michal Simek <monstr@monstr.eu>

1 files changed, 16 insertions, 3 deletions

diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S
index 41c30cdb270..5010f0b22ca 100644
--- a/arch/microblaze/kernel/entry.S
+++ b/arch/microblaze/kernel/entry.S
@@ -39,6 +39,15 @@
 /* The offset of the struct pt_regs in a `state save frame' on the stack. */
 #define PTO     STATE_SAVE_ARG_SPACE /* 24 the space for args */
 
+#ifdef DEBUG
+/* Create space for syscalls counting. */
+.section .data
+.global syscall_debug_table
+.align 4
+syscall_debug_table:
+        .space  (__NR_syscalls * 4)
+#endif /* DEBUG */
+
 #define C_ENTRY(name)   .globl name; .align 4; name
 
 /*
@@ -371,10 +380,14 @@ C_ENTRY(_user_exception):
         add     r12, r12, r12;
 
 #ifdef DEBUG
-        /* Trac syscalls and stored them to r0_ram */
-        lwi     r3, r12, 0x400 + r0_ram
+        /* Trac syscalls and stored them to syscall_debug_table */
+        /* The first syscall location stores total syscall number */
+        lwi     r3, r0, syscall_debug_table
+        addi    r3, r3, 1
+        swi     r3, r0, syscall_debug_table
+        lwi     r3, r12, syscall_debug_table
         addi    r3, r3, 1
-        swi     r3, r12, 0x400 + r0_ram
+        swi     r3, r12, syscall_debug_table
 #endif
 
         # Find and jump into the syscall handler.