[U-Boot] s5pc1xx: update cache routines

* [U-Boot] s5pc1xx: update cache routines
@ 2009-12-18  8:51 Minkyu Kang
  2010-01-13  4:19 ` Minkyu Kang
  0 siblings, 1 reply; 2+ messages in thread
From: Minkyu Kang @ 2009-12-18  8:51 UTC (permalink / raw)
  To: u-boot

Because of v7_flush_dcache_all is moved to omap3/cache.S
and s5pc110 needs cache routines, need to update s5pc1xx cache routines.

l2_cache_enable and l2_caceh_disable are moved from cache.c to cache.S
and invalidate_dcache is modified for SoC specific.

Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
---
 cpu/arm_cortexa8/s5pc1xx/Makefile        |    4 +-
 cpu/arm_cortexa8/s5pc1xx/cache.S         |  120 ++++++++++++++++++++++++++++++
 cpu/arm_cortexa8/s5pc1xx/cache.c         |   43 -----------
 include/asm-arm/arch-s5pc1xx/sys_proto.h |   32 ++++++++
 include/configs/smdkc100.h               |    2 -
 5 files changed, 154 insertions(+), 47 deletions(-)
 create mode 100644 cpu/arm_cortexa8/s5pc1xx/cache.S
 delete mode 100644 cpu/arm_cortexa8/s5pc1xx/cache.c
 create mode 100644 include/asm-arm/arch-s5pc1xx/sys_proto.h

diff --git a/cpu/arm_cortexa8/s5pc1xx/Makefile b/cpu/arm_cortexa8/s5pc1xx/Makefile
index e08d9d8..4f922e6 100644
--- a/cpu/arm_cortexa8/s5pc1xx/Makefile
+++ b/cpu/arm_cortexa8/s5pc1xx/Makefile
@@ -28,9 +28,9 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(SOC).a
 
-SOBJS	= reset.o
+SOBJS	= cache.o
+SOBJS	+= reset.o
 
-COBJS	+= cache.o
 COBJS	+= clock.o
 COBJS	+= cpu_info.o
 COBJS	+= timer.o
diff --git a/cpu/arm_cortexa8/s5pc1xx/cache.S b/cpu/arm_cortexa8/s5pc1xx/cache.S
new file mode 100644
index 0000000..23f527a
--- /dev/null
+++ b/cpu/arm_cortexa8/s5pc1xx/cache.S
@@ -0,0 +1,120 @@
+/*
+ * Copyright (C) 2009 Samsung Electronics
+ * Minkyu Kang <mk7.kang@samsung.com>
+ *
+ * based on cpu/arm_cortexa8/omap3/cache.S
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <asm/arch/cpu.h>
+
+.align 5
+.global invalidate_dcache
+.global l2_cache_enable
+.global l2_cache_disable
+
+/*
+ * invalidate_dcache()
+ * Invalidate the whole D-cache.
+ *
+ * Corrupted registers: r0-r5, r7, r9-r11
+ */
+invalidate_dcache:
+	stmfd	r13!, {r0 - r5, r7, r9 - r12, r14}
+
+	cmp	r0, #0xC100			@ check if the cpu is s5pc100
+
+	beq	finished_inval			@ s5pc100 doesn't need this
+						@ routine
+	mrc	p15, 1, r0, c0, c0, 1		@ read clidr
+	ands	r3, r0, #0x7000000		@ extract loc from clidr
+	mov	r3, r3, lsr #23			@ left align loc bit field
+	beq	finished_inval			@ if loc is 0, then no need to
+						@ clean
+	mov	r10, #0				@ start clean at cache level 0
+inval_loop1:
+	add	r2, r10, r10, lsr #1		@ work out 3x current cache
+						@ level
+	mov	r1, r0, lsr r2			@ extract cache type bits from
+						@ clidr
+	and	r1, r1, #7			@ mask of the bits for current
+						@ cache only
+	cmp	r1, #2				@ see what cache we have at
+						@ this level
+	blt	skip_inval			@ skip if no cache, or just
+						@ i-cache
+	mcr	p15, 2, r10, c0, c0, 0		@ select current cache level
+						@ in cssr
+	mov	r2, #0				@ operand for mcr SBZ
+	mcr	p15, 0, r2, c7, c5, 4		@ flush prefetch buffer to
+						@ sych the new cssr&csidr,
+						@ with armv7 this is 'isb',
+						@ but we compile with armv5
+	mrc	p15, 1, r1, c0, c0, 0		@ read the new csidr
+	and	r2, r1, #7			@ extract the length of the
+						@ cache lines
+	add	r2, r2, #4			@ add 4 (line length offset)
+	ldr	r4, =0x3ff
+	ands	r4, r4, r1, lsr #3		@ find maximum number on the
+						@ way size
+	clz	r5, r4				@ find bit position of way
+						@ size increment
+	ldr	r7, =0x7fff
+	ands	r7, r7, r1, lsr #13		@ extract max number of the
+						@ index size
+inval_loop2:
+	mov	r9, r4				@ create working copy of max
+						@ way size
+inval_loop3:
+	orr	r11, r10, r9, lsl r5		@ factor way and cache number
+						@ into r11
+	orr	r11, r11, r7, lsl r2		@ factor index number into r11
+	mcr	p15, 0, r11, c7, c6, 2		@ invalidate by set/way
+	subs	r9, r9, #1			@ decrement the way
+	bge	inval_loop3
+	subs	r7, r7, #1			@ decrement the index
+	bge	inval_loop2
+skip_inval:
+	add	r10, r10, #2			@ increment cache number
+	cmp	r3, r10
+	bgt	inval_loop1
+finished_inval:
+	mov	r10, #0				@ swith back to cache level 0
+	mcr	p15, 2, r10, c0, c0, 0		@ select current cache level
+						@ in cssr
+	mcr	p15, 0, r10, c7, c5, 4		@ flush prefetch buffer,
+						@ with armv7 this is 'isb',
+						@ but we compile with armv5
+
+	ldmfd	r13!, {r0 - r5, r7, r9 - r12, pc}
+
+l2_cache_enable:
+	push	{r0, r1, r2, lr}
+	mrc	15, 0, r3, cr1, cr0, 1
+	orr	r3, r3, #2
+	mcr	15, 0, r3, cr1, cr0, 1
+	pop	{r1, r2, r3, pc}
+
+l2_cache_disable:
+	push	{r0, r1, r2, lr}
+	mrc	15, 0, r3, cr1, cr0, 1
+	bic	r3, r3, #2
+	mcr	15, 0, r3, cr1, cr0, 1
+	pop	{r1, r2, r3, pc}
diff --git a/cpu/arm_cortexa8/s5pc1xx/cache.c b/cpu/arm_cortexa8/s5pc1xx/cache.c
deleted file mode 100644
index 8652a45..0000000
--- a/cpu/arm_cortexa8/s5pc1xx/cache.c
+++ /dev/null
@@ -1,43 +0,0 @@
-/*
- * Copyright (C) 2009 Samsung Electronics
- * Minkyu Kang <mk7.kang@samsung.com>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <common.h>
-#include <asm/cache.h>
-
-void l2_cache_enable(void)
-{
-	unsigned long i;
-
-	__asm__ __volatile__("mrc p15, 0, %0, c1, c0, 1":"=r"(i));
-	__asm__ __volatile__("orr %0, %0, #0x2":"=r"(i));
-	__asm__ __volatile__("mcr p15, 0, %0, c1, c0, 1":"=r"(i));
-}
-
-void l2_cache_disable(void)
-{
-	unsigned long i;
-
-	__asm__ __volatile__("mrc p15, 0, %0, c1, c0, 1":"=r"(i));
-	__asm__ __volatile__("bic %0, %0, #0x2":"=r"(i));
-	__asm__ __volatile__("mcr p15, 0, %0, c1, c0, 1":"=r"(i));
-}
diff --git a/include/asm-arm/arch-s5pc1xx/sys_proto.h b/include/asm-arm/arch-s5pc1xx/sys_proto.h
new file mode 100644
index 0000000..3078aaf
--- /dev/null
+++ b/include/asm-arm/arch-s5pc1xx/sys_proto.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2009 Samsung Electrnoics
+ * Minkyu Kang <mk7.kang@samsung.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _SYS_PROTO_H_
+#define _SYS_PROTO_H_
+
+u32 get_device_type(void);
+void invalidate_dcache(u32);
+void l2_cache_disable(void);
+void l2_cache_enable(void);
+
+#endif
diff --git a/include/configs/smdkc100.h b/include/configs/smdkc100.h
index 8c472af..9c27079 100644
--- a/include/configs/smdkc100.h
+++ b/include/configs/smdkc100.h
@@ -47,8 +47,6 @@
 
 #undef CONFIG_SKIP_RELOCATE_UBOOT
 
-#define CONFIG_L2_OFF
-
 /* input clock of PLL: SMDKC100 has 12MHz input clock */
 #define CONFIG_SYS_CLK_FREQ		12000000
 
-- 
1.5.4.3

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