diff options
Diffstat (limited to 'arch/microblaze/kernel/entry.S')
| -rw-r--r-- | arch/microblaze/kernel/entry.S | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S index 3fee82d6e9a2..042657165184 100644 --- a/arch/microblaze/kernel/entry.S +++ b/arch/microblaze/kernel/entry.S @@ -507,9 +507,6 @@ C_ENTRY(sys_rt_sigreturn_wrapper): #define SAVE_STATE \ swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)); /* save stack */ \ swi r11, r0, TOPHYS(r0_ram + PTO + PT_R11); /* Save r11 */ \ - set_bip; /*equalize initial state for all possible entries*/\ - clear_eip; \ - set_ee; \ /* See if already in kernel mode.*/ \ mfs r11, rmsr; \ nop; \ @@ -569,7 +566,7 @@ C_ENTRY(full_exception_trap): nop addik r12, r0, full_exception set_vms; - rtbd r12, 0; + rted r12, 0; nop; /* @@ -583,6 +580,17 @@ C_ENTRY(full_exception_trap): * The assembler routine is in "arch/microblaze/kernel/hw_exception_handler.S" */ C_ENTRY(unaligned_data_trap): + /* MS: I have to save r11 value and then restore it because + * set_bit, clear_eip, set_ee use r11 as temp register if MSR + * instructions are not used. We don't need to do if MSR instructions + * are used and they use r0 instead of r11. + * I am using ENTRY_SP which should be primary used only for stack + * pointer saving. */ + swi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); + set_bip; /* equalize initial state for all possible entries */ + clear_eip; + set_ee; + lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); SAVE_STATE /* Save registers.*/ /* where the trap should return need -8 to adjust for rtsd r15, 8 */ addik r15, r0, ret_from_exc-8 @@ -625,7 +633,7 @@ C_ENTRY(page_fault_data_trap): nop addik r12, r0, do_page_fault set_vms; - rtbd r12, 0; /* interrupts enabled */ + rted r12, 0; /* interrupts enabled */ nop; C_ENTRY(page_fault_instr_trap): @@ -638,7 +646,7 @@ C_ENTRY(page_fault_instr_trap): ori r7, r0, 0 /* parameter unsigned long error_code */ addik r12, r0, do_page_fault set_vms; - rtbd r12, 0; /* interrupts enabled */ + rted r12, 0; /* interrupts enabled */ nop; /* Entry point used to return from an exception. */ |