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authorMinkyu Kang <mk7.kang@samsung.com>2009-12-18 15:03:51 +0900
committerTom Rix <Tom.Rix@windriver.com>2010-01-23 08:15:48 -0600
commitd8e5f55475e621e793a15d93e2dd2549c5138735 (patch)
tree84b5d3a6093cf96379ea23f3bf4b6e655d5a9185 /cpu/arm_cortexa8
parent17ef9104ae11220979e1870f22dcaf535d9baacf (diff)
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s5pc1xx: update cache routines
Because of v7_flush_dcache_all is moved to omap3/cache.S and s5pc110 needs cache routines, 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>
Diffstat (limited to 'cpu/arm_cortexa8')
-rw-r--r--cpu/arm_cortexa8/s5pc1xx/Makefile4
-rw-r--r--cpu/arm_cortexa8/s5pc1xx/cache.S120
-rw-r--r--cpu/arm_cortexa8/s5pc1xx/cache.c43
3 files changed, 122 insertions, 45 deletions
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));
-}