Unify all of the cache handling code in the same place and add support
for properly clearing write back data caches.
Signed-off-by: Mike Frysinger <[EMAIL PROTECTED]>
---
cpu/blackfin/cpu.c | 35 ----------------------
lib_blackfin/cache.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 77 insertions(+), 35 deletions(-)
diff --git a/cpu/blackfin/cpu.c b/cpu/blackfin/cpu.c
index 53de5ab..5ae8875 100644
--- a/cpu/blackfin/cpu.c
+++ b/cpu/blackfin/cpu.c
@@ -14,46 +14,11 @@
#include <asm/blackfin.h>
#include <asm/cplb.h>
#include <asm/mach-common/bits/core.h>
-#include <asm/mach-common/bits/mpu.h>
#include <asm/mach-common/bits/trace.h>
#include "cpu.h"
#include "serial.h"
-void icache_enable(void)
-{
- bfin_write_IMEM_CONTROL(bfin_read_IMEM_CONTROL() | (IMC | ENICPLB));
- SSYNC();
-}
-
-void icache_disable(void)
-{
- bfin_write_IMEM_CONTROL(bfin_read_IMEM_CONTROL() & ~(IMC | ENICPLB));
- SSYNC();
-}
-
-int icache_status(void)
-{
- return bfin_read_IMEM_CONTROL() & ENICPLB;
-}
-
-void dcache_enable(void)
-{
- bfin_write_DMEM_CONTROL(bfin_read_DMEM_CONTROL() | (ACACHE_BCACHE |
ENDCPLB | PORT_PREF0));
- SSYNC();
-}
-
-void dcache_disable(void)
-{
- bfin_write_DMEM_CONTROL(bfin_read_DMEM_CONTROL() & ~(ACACHE_BCACHE |
ENDCPLB | PORT_PREF0));
- SSYNC();
-}
-
-int dcache_status(void)
-{
- return bfin_read_DMEM_CONTROL() & ENDCPLB;
-}
-
__attribute__ ((__noreturn__))
void cpu_init_f(ulong bootflag, ulong loaded_from_ldr)
{
diff --git a/lib_blackfin/cache.c b/lib_blackfin/cache.c
index c2f6e28..dcc0e8d 100644
--- a/lib_blackfin/cache.c
+++ b/lib_blackfin/cache.c
@@ -11,6 +11,7 @@
#include <common.h>
#include <asm/blackfin.h>
+#include <asm/mach-common/bits/mpu.h>
void flush_cache(unsigned long addr, unsigned long size)
{
@@ -24,3 +25,79 @@ void flush_cache(unsigned long addr, unsigned long size)
if (dcache_status())
blackfin_dcache_flush_range((void *)addr, (void *)(addr +
size));
}
+
+#ifdef CONFIG_DCACHE_WB
+static void flushinv_all_dcache(void)
+{
+ u32 way, bank, subbank, set;
+ u32 status, addr;
+ u32 dmem_ctl = bfin_read_DMEM_CONTROL();
+
+ for (bank = 0; bank < 2; ++bank) {
+ if (!(dmem_ctl & (1 << (DMC1_P - bank))))
+ continue;
+
+ for (way = 0; way < 2; ++way)
+ for (subbank = 0; subbank < 4; ++subbank)
+ for (set = 0; set < 64; ++set) {
+
+ bfin_write_DTEST_COMMAND(
+ way << 26 |
+ bank << 23 |
+ subbank << 16 |
+ set << 5
+ );
+ CSYNC();
+ status = bfin_read_DTEST_DATA0();
+
+ /* only worry about valid/dirty entries
*/
+ if ((status & 0x3) != 0x3)
+ continue;
+
+ /* construct the address using the tag
*/
+ addr = (status & 0xFFFFC800) | (subbank
<< 12) | (set << 5);
+
+ /* flush it */
+ __asm__ __volatile__("FLUSHINV[%0];" :
: "a"(addr));
+ }
+ }
+}
+#endif
+
+void icache_enable(void)
+{
+ bfin_write_IMEM_CONTROL(IMC | ENICPLB);
+ SSYNC();
+}
+
+void icache_disable(void)
+{
+ bfin_write_IMEM_CONTROL(0);
+ SSYNC();
+}
+
+int icache_status(void)
+{
+ return bfin_read_IMEM_CONTROL() & ENICPLB;
+}
+
+void dcache_enable(void)
+{
+ bfin_write_DMEM_CONTROL(ACACHE_BCACHE | ENDCPLB | PORT_PREF0);
+ SSYNC();
+}
+
+void dcache_disable(void)
+{
+#ifdef CONFIG_DCACHE_WB
+ bfin_write_DMEM_CONTROL(bfin_read_DMEM_CONTROL() & ~(ENDCPLB));
+ flushinv_all_dcache();
+#endif
+ bfin_write_DMEM_CONTROL(0);
+ SSYNC();
+}
+
+int dcache_status(void)
+{
+ return bfin_read_DMEM_CONTROL() & ENDCPLB;
+}
--
1.5.5.3
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