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Commit f940260a authored by Mike Frysinger's avatar Mike Frysinger Committed by Bryan Wu
Browse files

Blackfin arch: unify duplicated bss init code 



Signed-off-by: default avatarMike Frysinger <vapier.adi@gmail.com>
Signed-off-by: default avatarBryan Wu <cooloney@kernel.org>
parent ede6f5ae

arch/blackfin/mach-common/head.S

+19 −47
Original line number Diff line number Diff line
@@ -195,6 +195,19 @@ ENDPROC(__start) 
# define WDOG_CTL WDOGA_CTL

#endif



ENTRY(__init_clear_bss)

	r2 = r2 - r1;

	cc = r2 == 0;

	if cc jump .L_bss_done;

	r2 >>= 2;

	p1 = r1;

	p2 = r2;

	lsetup (1f, 1f) lc0 = p2;

1:	[p1++] = r0;

.L_bss_done:

	rts;

ENDPROC(__init_clear_bss)



ENTRY(_real_start)

	/* Enable nested interrupts */

	[--sp] = reti;
@@ -206,75 +219,34 @@ ENTRY(_real_start) 
	w[p0] = r0;

	ssync;



	r0 = 0 (x);

	/* Zero out all of the fun bss regions */

#if L1_DATA_A_LENGTH > 0

	r1.l = __sbss_l1;

	r1.h = __sbss_l1;

	r2.l = __ebss_l1;

	r2.h = __ebss_l1;

	r0 = 0 (z);

	r2 = r2 - r1;

	cc = r2 == 0;

	if cc jump .L_a_l1_done;

	r2 >>= 2;

	p1 = r1;

	p2 = r2;

	lsetup (.L_clear_a_l1, .L_clear_a_l1 ) lc0 = p2;

.L_clear_a_l1:

	[p1++] = r0;

.L_a_l1_done:

	call __init_clear_bss

#endif



#if L1_DATA_B_LENGTH > 0

	r1.l = __sbss_b_l1;

	r1.h = __sbss_b_l1;

	r2.l = __ebss_b_l1;

	r2.h = __ebss_b_l1;

	r0 = 0 (z);

	r2 = r2 - r1;

	cc = r2 == 0;

	if cc jump .L_b_l1_done;

	r2 >>= 2;

	p1 = r1;

	p2 = r2;

	lsetup (.L_clear_b_l1, .L_clear_b_l1 ) lc0 = p2;

.L_clear_b_l1:

	[p1++] = r0;

.L_b_l1_done:

	call __init_clear_bss

#endif



#if L2_LENGTH > 0

	r1.l = __sbss_l2;

	r1.h = __sbss_l2;

	r2.l = __ebss_l2;

	r2.h = __ebss_l2;

	r0 = 0 (z);

	r2 = r2 - r1;

	cc = r2 == 0;

	if cc jump .L_l2_done;

	r2 >>= 2;

	p1 = r1;

	p2 = r2;

	lsetup (.L_clear_l2, .L_clear_l2 ) lc0 = p2;

.L_clear_l2:

	[p1++] = r0;

.L_l2_done:

	call __init_clear_bss

#endif



	/* Zero out the bss region

	 * Note: this will fail if bss is 0 bytes ...

	 */

	r0 = 0 (z);

	r1.l = ___bss_start;

	r1.h = ___bss_start;

	r2.l = ___bss_stop;

	r2.h = ___bss_stop;

	r2 = r2 - r1;

	r2 >>= 2;

	p1 = r1;

	p2 = r2;

	lsetup (.L_clear_bss, .L_clear_bss) lc0 = p2;

.L_clear_bss:

	[p1++] = r0;

	call __init_clear_bss



	/* In case there is a NULL pointer reference,

	 * zero out region before stext