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Commit 06a54604 authored by Michal Simek's avatar Michal Simek
Browse files

microblaze: Optimize SAVE_STATE macro 



SAVE_STATE macro could be used for user_exception
or interrupt functions.

Signed-off-by: default avatarMichal Simek <monstr@monstr.eu>
parent 40eb0dc4

arch/microblaze/kernel/entry.S

+13 −8
Original line number Diff line number Diff line
@@ -513,9 +513,6 @@ C_ENTRY(sys_rt_sigreturn_wrapper): 
	tophys(r1,r1);							\

	addik	r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack.  */\

	SAVE_REGS							\

	/* PC, before IRQ/trap - this is one instruction above */	\

	swi	r17, r1, PTO+PT_PC;					\

									\

	addi	r11, r0, 1; 		/* Was in kernel-mode.  */	\

	swi	r11, r1, PTO+PT_MODE; 	 				\

	brid	2f;							\
@@ -528,20 +525,19 @@ C_ENTRY(sys_rt_sigreturn_wrapper): 
	tophys(r1,r1);							\

	addik	r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack.  */\

	SAVE_REGS							\

	/* PC, before IRQ/trap - this is one instruction above FIXME*/	\

	swi	r17, r1, PTO+PT_PC;					\

									\

	swi	r0, r1, PTO+PT_MODE; /* Was in user-mode.  */		\

	lwi	r11, r0, TOPHYS(PER_CPU(ENTRY_SP));			\

	swi	r11, r1, PTO+PT_R1; /* Store user SP.  */		\

2:	lwi	CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE));	\

	tovirt(r1,r1)

2:	lwi	CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE));



C_ENTRY(full_exception_trap):

	/* adjust exception address for privileged instruction

	 * for finding where is it */

	addik	r17, r17, -4

	SAVE_STATE /* Save registers */

	/* PC, before IRQ/trap - this is one instruction above */

	swi	r17, r1, PTO+PT_PC;

	tovirt(r1,r1)

	/* FIXME this can be store directly in PT_ESR reg.

	 * I tested it but there is a fault */

	/* where the trap should return need -8 to adjust for rtsd r15, 8 */
@@ -581,6 +577,9 @@ C_ENTRY(unaligned_data_trap): 
	set_ee;

	lwi	r11, r0, TOPHYS(PER_CPU(ENTRY_SP));

	SAVE_STATE		/* Save registers.*/

	/* PC, before IRQ/trap - this is one instruction above */

	swi	r17, r1, PTO+PT_PC;

	tovirt(r1,r1)

	/* where the trap should return need -8 to adjust for rtsd r15, 8 */

	addik	r15, r0, ret_from_exc-8

	mfs	r3, resr		/* ESR */
@@ -613,6 +612,9 @@ C_ENTRY(unaligned_data_trap): 
/* data and intruction trap - which is choose is resolved int fault.c */

C_ENTRY(page_fault_data_trap):

	SAVE_STATE		/* Save registers.*/

	/* PC, before IRQ/trap - this is one instruction above */

	swi	r17, r1, PTO+PT_PC;

	tovirt(r1,r1)

	/* where the trap should return need -8 to adjust for rtsd r15, 8 */

	addik	r15, r0, ret_from_exc-8

	addik	r5, r1, PTO		/* parameter struct pt_regs * regs */
@@ -627,6 +629,9 @@ C_ENTRY(page_fault_data_trap): 


C_ENTRY(page_fault_instr_trap):

	SAVE_STATE		/* Save registers.*/

	/* PC, before IRQ/trap - this is one instruction above */

	swi	r17, r1, PTO+PT_PC;

	tovirt(r1,r1)

	/* where the trap should return need -8 to adjust for rtsd r15, 8 */

	addik	r15, r0, ret_from_exc-8

	addik	r5, r1, PTO		/* parameter struct pt_regs * regs */