[U-Boot] [PATCH v3 10/10] armv7: adapt s5pc1xx to the new cache maintenance framework

Aneesh V
2011-05-12T12:11:16Z

adapt s5pc1xx to the new layered cache maintenance framework

Signed-off-by: Aneesh V <aneesh@ti.com>
---
V2:
* Changes for the function pointer to weakly linked change
---
arch/arm/cpu/armv7/s5pc1xx/cache.S | 88 ++-----------------------
arch/arm/include/asm/arch-s5pc1xx/sys_proto.h | 3 -
2 files changed, 7 insertions(+), 84 deletions(-)

diff --git a/arch/arm/cpu/armv7/s5pc1xx/cache.S b/arch/arm/cpu/armv7/s5pc1xx/cache.S
index 7734b32..726afe7 100644
--- a/arch/arm/cpu/armv7/s5pc1xx/cache.S
+++ b/arch/arm/cpu/armv7/s5pc1xx/cache.S
@@ -23,98 +23,24 @@
* 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
+#if !defined(CONFIG_SYS_NO_DCACHE) && !defined(CONFIG_SYS_NO_L2CACHE)

- ldmfd r13!, {r0 - r5, r7, r9 - r12, pc}
-
-l2_cache_enable:
+.global v7_outer_cache_enable
+v7_outer_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:
+.global v7_outer_cache_disable
+v7_outer_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}
+
+#endif
diff --git a/arch/arm/include/asm/arch-s5pc1xx/sys_proto.h b/arch/arm/include/asm/arch-s5pc1xx/sys_proto.h
index 3078aaf..7b83c5a 100644
--- a/arch/arm/include/asm/arch-s5pc1xx/sys_proto.h
+++ b/arch/arm/include/asm/arch-s5pc1xx/sys_proto.h
@@ -25,8 +25,5 @@
#define _SYS_PROTO_H_

u32 get_device_type(void);
-void invalidate_dcache(u32);
-void l2_cache_disable(void);
-void l2_cache_enable(void);

#endif
--
1.7.0.4