[U-Boot] [PATCH 2/3] arm: clean cache management
Jean-Christophe PLAGNIOL-VILLARD
plagnioj at jcrosoft.com
Mon Mar 30 18:48:19 CEST 2009
unify arm cache management except for non standard cache as ARM7TDMI
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
---
board/armltd/integratorap/split_by_variant.sh | 16 +++-
cpu/arm1136/cpu.c | 46 +++---------
cpu/arm1176/cpu.c | 57 +--------------
cpu/arm720t/cpu.c | 74 +++---------------
cpu/arm920t/cpu.c | 73 +++----------------
cpu/arm925t/cpu.c | 45 +++---------
cpu/arm926ejs/cpu.c | 72 +++---------------
cpu/arm946es/cpu.c | 48 +++---------
cpu/arm_cortexa8/cpu.c | 39 ----------
cpu/arm_intcm/cpu.c | 15 ----
cpu/ixp/cpu.c | 64 +++-------------
cpu/lh7a40x/cpu.c | 70 +++---------------
cpu/pxa/cpu.c | 62 ++-------------
cpu/sa1100/cpu.c | 58 ++------------
include/configs/B2.h | 1 +
include/configs/assabet.h | 2 +
include/configs/cerf250.h | 3 +
include/configs/cradle.h | 3 +
include/configs/csb226.h | 4 +
include/configs/delta.h | 3 +
include/configs/dnp1110.h | 2 +
include/configs/evb4510.h | 1 +
include/configs/gcplus.h | 2 +
include/configs/innokom.h | 4 +
include/configs/lart.h | 2 +
include/configs/logodl.h | 4 +
include/configs/lubbock.h | 3 +
include/configs/pleb2.h | 3 +
include/configs/pxa255_idp.h | 3 +
include/configs/shannon.h | 2 +
include/configs/trizepsiv.h | 3 +
include/configs/wepep250.h | 2 +
include/configs/xaeniax.h | 3 +
include/configs/xm250.h | 3 +
include/configs/xsengine.h | 3 +
include/configs/zylonite.h | 3 +
lib_arm/Makefile | 3 +
cpu/arm926ejs/cpu.c => lib_arm/cache-cp15.c | 100 ++++++++++---------------
38 files changed, 217 insertions(+), 684 deletions(-)
copy cpu/arm926ejs/cpu.c => lib_arm/cache-cp15.c (59%)
diff --git a/board/armltd/integratorap/split_by_variant.sh b/board/armltd/integratorap/split_by_variant.sh
index 51dc53f..0c89844 100755
--- a/board/armltd/integratorap/split_by_variant.sh
+++ b/board/armltd/integratorap/split_by_variant.sh
@@ -84,8 +84,8 @@ else
esac
fi
-if [ "$cpu" = "arm_intcm" ]
-then
+case "$cpu" in
+ arm_intcm)
echo "/* Core module undefined/not ported */" >> tmp.fil
echo "#define CONFIG_ARM_INTCM 1" >> tmp.fil
echo -n "#undef CONFIG_CM_MULTIPLE_SSRAM" >> tmp.fil
@@ -102,7 +102,17 @@ then
echo "initialization reg */" >> tmp.fil
echo -n "#undef CONFIG_CM_TCRAM " >> tmp.fil
echo " /* CM may not have TCRAM */" >> tmp.fil
-fi
+ echo " /* May not be cahed processor */" >> tmp.fil
+ echo "#define CONFIG_SYS_NO_ICACHE 1" >> tmp.fil
+ echo "#define CONFIG_SYS_NO_DCACHE 1" >> tmp.fil
+ ;;
+
+ arm720t)
+ echo " /* May not be cahed processor */" >> tmp.fil
+ echo "#define CONFIG_SYS_NO_ICACHE 1" >> tmp.fil
+ echo "#define CONFIG_SYS_NO_DCACHE 1" >> tmp.fil
+ ;;
+esac
mkdir -p ${obj}include
mkdir -p ${obj}board/armltd/integratorap
diff --git a/cpu/arm1136/cpu.c b/cpu/arm1136/cpu.c
index 0abe307..78f6e92 100644
--- a/cpu/arm1136/cpu.c
+++ b/cpu/arm1136/cpu.c
@@ -39,13 +39,7 @@
DECLARE_GLOBAL_DATA_PTR;
#endif
-static void cp_delay (void)
-{
- volatile int i;
-
- /* Many OMAP regs need at least 2 nops */
- for (i = 0; i < 100; i++);
-}
+static void cache_flush(void);
int cpu_init (void)
{
@@ -68,8 +62,6 @@ int cleanup_before_linux (void)
* we turn off caches etc ...
*/
- unsigned long i;
-
disable_interrupts ();
#ifdef CONFIG_LCD
@@ -83,15 +75,12 @@ int cleanup_before_linux (void)
#endif
/* turn off I/D-cache */
- asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
- i &= ~(CR_C | CR_I);
- asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
-
+ icache_disable();
+ dcache_disable();
/* flush I/D-cache */
- i = 0;
- asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i)); /* invalidate both caches and flush btb */
- asm ("mcr p15, 0, %0, c7, c10, 4": :"r" (i)); /* mem barrier to sync things */
- return(0);
+ cache_flush();
+
+ return 0;
}
int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
@@ -102,25 +91,10 @@ int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
return(0);
}
-void icache_enable (void)
+static void cache_flush(void)
{
- ulong reg;
+ unsigned long i = 0;
- reg = get_cr (); /* get control reg. */
- cp_delay ();
- set_cr (reg | CR_I);
-}
-
-void icache_disable (void)
-{
- ulong reg;
-
- reg = get_cr ();
- cp_delay ();
- set_cr (reg & ~CR_I);
-}
-
-int icache_status (void)
-{
- return(get_cr () & CR_I) != 0;
+ asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i)); /* invalidate both caches and flush btb */
+ asm ("mcr p15, 0, %0, c7, c10, 4": :"r" (i)); /* mem barrier to sync things */
}
diff --git a/cpu/arm1176/cpu.c b/cpu/arm1176/cpu.c
index ef78bd9..8aefbe3 100644
--- a/cpu/arm1176/cpu.c
+++ b/cpu/arm1176/cpu.c
@@ -38,15 +38,6 @@
static void cache_flush (void);
-static void cp_delay (void)
-{
- volatile int i;
-
- /* Many OMAP regs need at least 2 nops */
- for (i = 0; i < 100; i++)
- __asm__ __volatile__("nop\n");
-}
-
int cpu_init (void)
{
return 0;
@@ -66,6 +57,7 @@ int cleanup_before_linux (void)
/* turn off I/D-cache */
icache_disable();
dcache_disable();
+ /* flush I/D-cache */
cache_flush();
return 0;
@@ -95,53 +87,6 @@ int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
return 0;
}
-void icache_enable (void)
-{
- ulong reg;
-
- reg = get_cr (); /* get control reg. */
- cp_delay ();
- set_cr (reg | CR_I);
-}
-
-void icache_disable (void)
-{
- ulong reg;
-
- reg = get_cr ();
- cp_delay ();
- set_cr (reg & ~CR_I);
-}
-
-int icache_status (void)
-{
- return (get_cr () & CR_I) != 0;
-}
-
-/* It makes no sense to use the dcache if the MMU is not enabled */
-void dcache_enable (void)
-{
- ulong reg;
-
- reg = get_cr ();
- cp_delay ();
- set_cr (reg | CR_C);
-}
-
-void dcache_disable (void)
-{
- ulong reg;
-
- reg = get_cr ();
- cp_delay ();
- set_cr (reg & ~CR_C);
-}
-
-int dcache_status (void)
-{
- return (get_cr () & CR_C) != 0;
-}
-
/* flush I/D-cache */
static void cache_flush (void)
{
diff --git a/cpu/arm720t/cpu.c b/cpu/arm720t/cpu.c
index d178e41..a6f5c4d 100644
--- a/cpu/arm720t/cpu.c
+++ b/cpu/arm720t/cpu.c
@@ -36,6 +36,10 @@
#include <asm/hardware.h>
#include <asm/system.h>
+#if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_ARMADILLO)
+static void cache_flush(void);
+#endif
+
int cpu_init (void)
{
/*
@@ -59,17 +63,14 @@ int cleanup_before_linux (void)
*/
#if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_ARMADILLO)
- unsigned long i;
-
disable_interrupts ();
/* turn off I-cache */
- asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
- i &= ~0x1000;
- asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
+ icache_disable();
+ dcache_disable();
/* flush I-cache */
- asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
+ cache_flush();
#ifdef CONFIG_ARM7_REVD
/* go to high speed */
IO_SYSCON3 = (IO_SYSCON3 & ~CLKCTL) | CLKCTL_73;
@@ -93,64 +94,13 @@ int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
return (0);
}
-/*
- * Instruction and Data cache enable and disable functions
- *
- */
-
-#if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_NETARM) || defined(CONFIG_ARMADILLO)
-static void cp_delay (void)
-{
- volatile int i;
-
- /* copro seems to need some delay between reading and writing */
- for (i = 0; i < 100; i++);
-}
-
-void icache_enable (void)
-{
- ulong reg;
-
- reg = get_cr ();
- cp_delay ();
- set_cr (reg | CR_C);
-}
-
-void icache_disable (void)
-{
- ulong reg;
-
- reg = get_cr ();
- cp_delay ();
- set_cr (reg & ~CR_C);
-}
-
-int icache_status (void)
-{
- return (get_cr () & CR_C) != 0;
-}
-
-void dcache_enable (void)
-{
- ulong reg;
-
- reg = get_cr ();
- cp_delay ();
- set_cr (reg | CR_C);
-}
-
-void dcache_disable (void)
+#if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_ARMADILLO)
+/* flush I/D-cache */
+static void cache_flush (void)
{
- ulong reg;
+ unsigned long i = 0;
- reg = get_cr ();
- cp_delay ();
- set_cr (reg & ~CR_C);
-}
-
-int dcache_status (void)
-{
- return (get_cr () & CR_C) != 0;
+ asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
}
#elif defined(CONFIG_INTEGRATOR) && defined(CONFIG_ARCH_INTEGRATOR)
/* No specific cache setup for IntegratorAP/CM720T as yet */
diff --git a/cpu/arm920t/cpu.c b/cpu/arm920t/cpu.c
index 83ee3f3..08c9339 100644
--- a/cpu/arm920t/cpu.c
+++ b/cpu/arm920t/cpu.c
@@ -38,13 +38,7 @@
DECLARE_GLOBAL_DATA_PTR;
#endif
-static void cp_delay (void)
-{
- volatile int i;
-
- /* copro seems to need some delay between reading and writing */
- for (i = 0; i < 100; i++);
-}
+static void cache_flush(void);
int cpu_init (void)
{
@@ -67,20 +61,15 @@ int cleanup_before_linux (void)
* we turn off caches etc ...
*/
- unsigned long i;
-
disable_interrupts ();
/* turn off I/D-cache */
- asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
- i &= ~(CR_C | CR_I);
- asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
-
+ icache_disable();
+ dcache_disable();
/* flush I/D-cache */
- i = 0;
- asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i));
+ cache_flush();
- return (0);
+ return 0;
}
int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
@@ -88,55 +77,13 @@ int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
disable_interrupts ();
reset_cpu (0);
/*NOTREACHED*/
- return (0);
-}
-
-void icache_enable (void)
-{
- ulong reg;
-
- reg = get_cr (); /* get control reg. */
- cp_delay ();
- set_cr (reg | CR_I);
-}
-
-void icache_disable (void)
-{
- ulong reg;
-
- reg = get_cr ();
- cp_delay ();
- set_cr (reg & ~CR_I);
-}
-
-int icache_status (void)
-{
- return (get_cr () & CR_I) != 0;
-}
-
-#ifdef USE_920T_MMU
-/* It makes no sense to use the dcache if the MMU is not enabled */
-void dcache_enable (void)
-{
- ulong reg;
-
- reg = get_cr ();
- cp_delay ();
- set_cr (reg | CR_C);
+ return 0;
}
-void dcache_disable (void)
+/* flush I/D-cache */
+static void cache_flush (void)
{
- ulong reg;
-
- reg = get_cr ();
- cp_delay ();
- reg &= ~CR_C;
- set_cr (reg);
-}
+ unsigned long i = 0;
-int dcache_status (void)
-{
- return (get_cr () & CR_C) != 0;
+ asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i));
}
-#endif
diff --git a/cpu/arm925t/cpu.c b/cpu/arm925t/cpu.c
index 8d1b562..eb6364d 100644
--- a/cpu/arm925t/cpu.c
+++ b/cpu/arm925t/cpu.c
@@ -38,13 +38,7 @@
DECLARE_GLOBAL_DATA_PTR;
#endif
-static void cp_delay (void)
-{
- volatile int i;
-
- /* Many OMAP regs need at least 2 nops */
- for (i = 0; i < 100; i++);
-}
+static void cache_flush(void);
int cpu_init (void)
{
@@ -67,19 +61,16 @@ int cleanup_before_linux (void)
* we turn off caches etc ...
*/
- unsigned long i;
-
disable_interrupts ();
- /* turn off I/D-cache */
- asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
- i &= ~(CR_C | CR_I);
- asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
+ /* turn off I/D-cache */
+ icache_disable();
+ dcache_disable();
/* flush I/D-cache */
- i = 0;
- asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i));
- return (0);
+ cache_flush();
+
+ return 0;
}
int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
@@ -90,25 +81,11 @@ int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
return (0);
}
-void icache_enable (void)
-{
- ulong reg;
-
- reg = get_cr (); /* get control reg. */
- cp_delay ();
- set_cr (reg | CR_I);
-}
-
-void icache_disable (void)
+/* flush I/D-cache */
+static void cache_flush (void)
{
- ulong reg;
+ unsigned long i = 0;
- reg = get_cr ();
- cp_delay ();
- set_cr (reg & ~CR_I);
+ asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i));
}
-int icache_status (void)
-{
- return (get_cr () & CR_I) != 0;
-}
diff --git a/cpu/arm926ejs/cpu.c b/cpu/arm926ejs/cpu.c
index d1748c9..84c169e 100644
--- a/cpu/arm926ejs/cpu.c
+++ b/cpu/arm926ejs/cpu.c
@@ -38,13 +38,7 @@
DECLARE_GLOBAL_DATA_PTR;
#endif
-static void cp_delay (void)
-{
- volatile int i;
-
- /* copro seems to need some delay between reading and writing */
- for (i = 0; i < 100; i++);
-}
+static void cache_flush(void);
int cpu_init (void)
{
@@ -67,20 +61,16 @@ int cleanup_before_linux (void)
* we turn off caches etc ...
*/
- unsigned long i;
-
disable_interrupts ();
- /* turn off I/D-cache */
- asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
- i &= ~(CR_C | CR_I);
- asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
+ /* turn off I/D-cache */
+ icache_disable();
+ dcache_disable();
/* flush I/D-cache */
- i = 0;
- asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i));
+ cache_flush();
- return (0);
+ return 0;
}
int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
@@ -91,52 +81,10 @@ int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
return (0);
}
-/* cache_bit must be either CR_I or CR_C */
-static void cache_enable(uint32_t cache_bit)
-{
- uint32_t reg;
-
- reg = get_cr(); /* get control reg. */
- cp_delay();
- set_cr(reg | cache_bit);
-}
-
-/* cache_bit must be either CR_I or CR_C */
-static void cache_disable(uint32_t cache_bit)
-{
- uint32_t reg;
-
- reg = get_cr();
- cp_delay();
- set_cr(reg & ~cache_bit);
-}
-
-void icache_enable(void)
-{
- cache_enable(CR_I);
-}
-
-void icache_disable(void)
-{
- cache_disable(CR_I);
-}
-
-int icache_status(void)
-{
- return (get_cr() & CR_I) != 0;
-}
-
-void dcache_enable(void)
-{
- cache_enable(CR_C);
-}
-
-void dcache_disable(void)
+/* flush I/D-cache */
+static void cache_flush (void)
{
- cache_disable(CR_C);
-}
+ unsigned long i = 0;
-int dcache_status(void)
-{
- return (get_cr() & CR_C) != 0;
+ asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i));
}
diff --git a/cpu/arm946es/cpu.c b/cpu/arm946es/cpu.c
index 25684f2..8d0c533 100644
--- a/cpu/arm946es/cpu.c
+++ b/cpu/arm946es/cpu.c
@@ -38,13 +38,7 @@
DECLARE_GLOBAL_DATA_PTR;
#endif
-static void cp_delay (void)
-{
- volatile int i;
-
- /* copro seems to need some delay between reading and writing */
- for (i = 0; i < 100; i++);
-}
+static void cache_flush(void);
int cpu_init (void)
{
@@ -67,8 +61,6 @@ int cleanup_before_linux (void)
* we turn off caches etc ...
*/
- unsigned long i;
-
disable_interrupts ();
/* ARM926E-S needs the protection unit enabled for the icache to have
@@ -76,15 +68,12 @@ int cleanup_before_linux (void)
* should turn off the protection unit as well....
*/
/* turn off I/D-cache */
- asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
- i &= ~(CR_C | CR_I);
- asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
-
+ icache_disable();
+ dcache_disable();
/* flush I/D-cache */
- i = 0;
- asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
- asm ("mcr p15, 0, %0, c7, c6, 0": :"r" (i));
- return (0);
+ cache_flush();
+
+ return 0;
}
int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
@@ -96,27 +85,12 @@ int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
/*NOTREACHED*/
return (0);
}
-/* ARM926E-S needs the protection unit enabled for this to have any effect
- - left for possible later use */
-void icache_enable (void)
-{
- ulong reg;
- reg = get_cr (); /* get control reg. */
- cp_delay ();
- set_cr (reg | CR_I);
-}
-
-void icache_disable (void)
+/* flush I/D-cache */
+static void cache_flush (void)
{
- ulong reg;
+ unsigned long i = 0;
- reg = get_cr ();
- cp_delay ();
- set_cr (reg & ~CR_I);
-}
-
-int icache_status (void)
-{
- return (get_cr () & CR_I) != 0;
+ asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
+ asm ("mcr p15, 0, %0, c7, c6, 0": :"r" (i));
}
diff --git a/cpu/arm_cortexa8/cpu.c b/cpu/arm_cortexa8/cpu.c
index 506dbec..64ee972 100644
--- a/cpu/arm_cortexa8/cpu.c
+++ b/cpu/arm_cortexa8/cpu.c
@@ -46,13 +46,6 @@ void l2cache_disable(void);
static void cache_flush(void);
-static void cp_delay(void)
-{
- /* Many OMAP regs need at least 2 nops */
- asm("nop");
- asm("nop");
-}
-
int cpu_init(void)
{
/*
@@ -111,33 +104,6 @@ int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
return 0;
}
-void icache_enable(void)
-{
- ulong reg;
-
- reg = get_cr(); /* get control reg. */
- cp_delay();
- set_cr(reg | CR_I);
-}
-
-void icache_disable(void)
-{
- ulong reg;
-
- reg = get_cr();
- cp_delay();
- set_cr(reg & ~CR_I);
-}
-
-void dcache_disable (void)
-{
- ulong reg;
-
- reg = get_cr ();
- cp_delay ();
- set_cr (reg & ~CR_C);
-}
-
void l2cache_enable()
{
unsigned long i;
@@ -197,11 +163,6 @@ void l2cache_disable()
}
}
-int icache_status(void)
-{
- return (get_cr() & CR_I) != 0;
-}
-
static void cache_flush(void)
{
asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (0));
diff --git a/cpu/arm_intcm/cpu.c b/cpu/arm_intcm/cpu.c
index ccf7fd5..ea6747a 100644
--- a/cpu/arm_intcm/cpu.c
+++ b/cpu/arm_intcm/cpu.c
@@ -76,18 +76,3 @@ int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
/*NOTREACHED*/
return (0);
}
-
-/* May not be cahed processor on the CM - do nothing */
-void icache_enable (void)
-{
-}
-
-void icache_disable (void)
-{
-}
-
-/* return "disabled" */
-int icache_status (void)
-{
- return 0;
-}
diff --git a/cpu/ixp/cpu.c b/cpu/ixp/cpu.c
index 265c820..d9cfbab 100644
--- a/cpu/ixp/cpu.c
+++ b/cpu/ixp/cpu.c
@@ -42,6 +42,8 @@ ulong loops_per_jiffy;
DECLARE_GLOBAL_DATA_PTR;
#endif
+static void cache_flush(void);
+
#if defined(CONFIG_DISPLAY_CPUINFO)
int print_cpuinfo (void)
{
@@ -99,19 +101,16 @@ int cleanup_before_linux (void)
* just disable everything that can disturb booting linux
*/
- unsigned long i;
-
disable_interrupts ();
/* turn off I-cache */
- asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
- i &= ~0x1000;
- asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
+ icache_disable();
+ dcache_disable();
/* flush I-cache */
- asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
+ cache_flush();
- return (0);
+ return 0;
}
int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
@@ -126,55 +125,12 @@ int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
return (0);
}
-/* cache_bit must be either CR_I or CR_C */
-static void cache_enable(uint32_t cache_bit)
-{
- uint32_t reg;
-
- reg = get_cr(); /* get control reg. */
- cp_delay();
- set_cr(reg | cache_bit);
-}
-
-/* cache_bit must be either CR_I or CR_C */
-static void cache_disable(uint32_t cache_bit)
-{
- uint32_t reg;
-
- reg = get_cr();
- cp_delay();
- set_cr(reg & ~cache_bit);
-}
-
-void icache_enable(void)
-{
- cache_enable(CR_I);
-}
-
-void icache_disable(void)
-{
- cache_disable(CR_I);
-}
-
-int icache_status(void)
+/* flush I/D-cache */
+static void cache_flush (void)
{
- return (get_cr() & CR_I) != 0;
-}
+ unsigned long i = 0;
-/* we will never enable dcache, because we have to setup MMU first */
-void dcache_enable (void)
-{
- return;
-}
-
-void dcache_disable (void)
-{
- return;
-}
-
-int dcache_status (void)
-{
- return 0; /* always off */
+ asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
}
/* FIXME */
diff --git a/cpu/lh7a40x/cpu.c b/cpu/lh7a40x/cpu.c
index 2c6799f..e862251 100644
--- a/cpu/lh7a40x/cpu.c
+++ b/cpu/lh7a40x/cpu.c
@@ -38,13 +38,7 @@
DECLARE_GLOBAL_DATA_PTR;
#endif
-static void cp_delay (void)
-{
- volatile int i;
-
- /* copro seems to need some delay between reading and writing */
- for (i = 0; i < 100; i++);
-}
+static void cache_flush(void);
int cpu_init (void)
{
@@ -67,19 +61,16 @@ int cleanup_before_linux (void)
* we turn off caches etc ...
*/
- unsigned long i;
-
disable_interrupts ();
/* turn off I/D-cache */
- asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
- i &= ~(CR_C | CR_I);
- asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
+ icache_disable();
+ dcache_disable();
/* flush I/D-cache */
- i = 0;
- asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i));
- return (0);
+ cache_flush();
+
+ return 0;
}
int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
@@ -90,52 +81,11 @@ int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
return (0);
}
-void icache_enable (void)
-{
- ulong reg;
-
- reg = get_cr ();
- cp_delay ();
- set_cr (reg | CR_I);
-}
-void icache_disable (void)
+/* flush I/D-cache */
+static void cache_flush (void)
{
- ulong reg;
+ unsigned long i = 0;
- reg = get_cr ();
- cp_delay ();
- set_cr (reg & ~CR_I);
-}
-
-int icache_status (void)
-{
- return (get_cr () & CR_I) != 0;
-}
-
-#ifdef USE_920T_MMU
-/* It makes no sense to use the dcache if the MMU is not enabled */
-void dcache_enable (void)
-{
- ulong reg;
-
- reg = get_cr ();
- cp_delay ();
- set_cr (reg | CR_C);
-}
-
-void dcache_disable (void)
-{
- ulong reg;
-
- reg = get_cr ();
- cp_delay ();
- reg &= ~CR_C;
- set_cr (reg);
-}
-
-int dcache_status (void)
-{
- return (get_cr () & CR_C) != 0;
+ asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i));
}
-#endif
diff --git a/cpu/pxa/cpu.c b/cpu/pxa/cpu.c
index e27b6b9..ab58d39 100644
--- a/cpu/pxa/cpu.c
+++ b/cpu/pxa/cpu.c
@@ -39,6 +39,8 @@
DECLARE_GLOBAL_DATA_PTR;
#endif
+static void cache_flush(void);
+
int cpu_init (void)
{
/*
@@ -60,17 +62,14 @@ int cleanup_before_linux (void)
* just disable everything that can disturb booting linux
*/
- unsigned long i;
-
disable_interrupts ();
/* turn off I-cache */
- asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
- i &= ~0x1000;
- asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
+ icache_disable();
+ dcache_disable();
/* flush I-cache */
- asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
+ cache_flush();
return (0);
}
@@ -87,55 +86,12 @@ int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
return (0);
}
-/* cache_bit must be either CR_I or CR_C */
-static void cache_enable(uint32_t cache_bit)
-{
- uint32_t reg;
-
- reg = get_cr(); /* get control reg. */
- cp_delay();
- set_cr(reg | cache_bit);
-}
-
-/* cache_bit must be either CR_I or CR_C */
-static void cache_disable(uint32_t cache_bit)
-{
- uint32_t reg;
-
- reg = get_cr();
- cp_delay();
- set_cr(reg & ~cache_bit);
-}
-
-void icache_enable(void)
-{
- cache_enable(CR_I);
-}
-
-void icache_disable(void)
+/* flush I/D-cache */
+static void cache_flush (void)
{
- cache_disable(CR_I);
-}
+ unsigned long i = 0;
-int icache_status(void)
-{
- return (get_cr() & CR_I) != 0;
-}
-
-/* we will never enable dcache, because we have to setup MMU first */
-void dcache_enable (void)
-{
- return;
-}
-
-void dcache_disable (void)
-{
- return;
-}
-
-int dcache_status (void)
-{
- return 0; /* always off */
+ asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
}
#ifndef CONFIG_CPU_MONAHANS
diff --git a/cpu/sa1100/cpu.c b/cpu/sa1100/cpu.c
index d0dfa3d..6c897d0 100644
--- a/cpu/sa1100/cpu.c
+++ b/cpu/sa1100/cpu.c
@@ -38,6 +38,8 @@
DECLARE_GLOBAL_DATA_PTR;
#endif
+static void cache_flush(void);
+
int cpu_init (void)
{
/*
@@ -59,17 +61,14 @@ int cleanup_before_linux (void)
* just disable everything that can disturb booting linux
*/
- unsigned long i;
-
disable_interrupts ();
/* turn off I-cache */
- asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
- i &= ~0x1000;
- asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
+ icache_disable();
+ dcache_disable();
/* flush I-cache */
- asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
+ cache_flush();
return (0);
}
@@ -86,49 +85,10 @@ int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
return (0);
}
-static void cp_delay (void)
-{
- volatile int i;
-
- /* copro seems to need some delay between reading and writing */
- for (i = 0; i < 100; i++);
-}
-
-void icache_enable (void)
-{
- ulong reg;
-
- reg = get_cr ();
- cp_delay ();
- set_cr (reg | CR_C);
-}
-
-void icache_disable (void)
-{
- ulong reg;
-
- reg = get_cr ();
- cp_delay ();
- set_cr (reg & ~CR_C);
-}
-
-int icache_status (void)
-{
- return (get_cr () & CR_C) != 0;
-}
-
-/* we will never enable dcache, because we have to setup MMU first */
-void dcache_enable (void)
+/* flush I/D-cache */
+static void cache_flush (void)
{
- return;
-}
-
-void dcache_disable (void)
-{
- return;
-}
+ unsigned long i = 0;
-int dcache_status (void)
-{
- return 0; /* always off */
+ asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
}
diff --git a/include/configs/B2.h b/include/configs/B2.h
index 01b65c5..35fad5c 100644
--- a/include/configs/B2.h
+++ b/include/configs/B2.h
@@ -38,6 +38,7 @@
#define CONFIG_B2 1 /* on an B2 Board */
#define CONFIG_ARM_THUMB 1 /* this is an ARM7TDMI */
#undef CONFIG_ARM7_REVD /* disable ARM720 REV.D Workarounds */
+#define CONFIG_SYS_NO_CP15_CACHE
#define CONFIG_S3C44B0_CLOCK_SPEED 75 /* we have a 75Mhz S3C44B0*/
diff --git a/include/configs/assabet.h b/include/configs/assabet.h
index a6c442b..8c5b84c 100644
--- a/include/configs/assabet.h
+++ b/include/configs/assabet.h
@@ -37,6 +37,8 @@
#define CONFIG_ASSABET 1 /* on an Intel Assabet Board */
#undef CONFIG_USE_IRQ
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
#define CONFIG_CMDLINE_TAG 1 /* enable passing of ATAGs */
#define CONFIG_SETUP_MEMORY_TAGS 1
diff --git a/include/configs/cerf250.h b/include/configs/cerf250.h
index 751e03c..82d1401 100644
--- a/include/configs/cerf250.h
+++ b/include/configs/cerf250.h
@@ -41,6 +41,9 @@
#undef CONFIG_USE_IRQ /* we don't need IRQ/FIQ stuff */
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
+
/*
* Size of malloc() pool
*/
diff --git a/include/configs/cradle.h b/include/configs/cradle.h
index 850d93b..75c5f9b 100644
--- a/include/configs/cradle.h
+++ b/include/configs/cradle.h
@@ -37,6 +37,9 @@
#undef CONFIG_USE_IRQ /* we don't need IRQ/FIQ stuff */
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
+
/*
* Size of malloc() pool
*/
diff --git a/include/configs/csb226.h b/include/configs/csb226.h
index d9f85f0..ed18450 100644
--- a/include/configs/csb226.h
+++ b/include/configs/csb226.h
@@ -42,6 +42,10 @@
#undef CONFIG_USE_IRQ /* we don't need IRQ/FIQ stuff */
/* for timer/console/ethernet */
+
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
+
/*
* Hardware drivers
*/
diff --git a/include/configs/delta.h b/include/configs/delta.h
index f5508b7..bacbd90 100644
--- a/include/configs/delta.h
+++ b/include/configs/delta.h
@@ -39,6 +39,9 @@
#undef CONFIG_SKIP_RELOCATE_UBOOT
#undef CONFIG_USE_IRQ /* we don't need IRQ/FIQ stuff */
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
+
/*
* Size of malloc() pool
*/
diff --git a/include/configs/dnp1110.h b/include/configs/dnp1110.h
index 8f615bd..b6cfc67 100644
--- a/include/configs/dnp1110.h
+++ b/include/configs/dnp1110.h
@@ -42,6 +42,8 @@
#define CONFIG_DNP1110 1 /* on an DNP/1110 Board */
#undef CONFIG_USE_IRQ /* we don't need IRQ/FIQ stuff */
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
/*
* Size of malloc() pool
diff --git a/include/configs/evb4510.h b/include/configs/evb4510.h
index ffc9408..0f415d9 100644
--- a/include/configs/evb4510.h
+++ b/include/configs/evb4510.h
@@ -43,6 +43,7 @@
#define CONFIG_ARM_THUMB 1 /* this is an ARM7TDMI */
#define CONFIG_S3C4510B 1 /* it's a S3C4510B chip */
#define CONFIG_EVB4510 1 /* on an EVB4510 Board */
+#define CONFIG_SYS_NO_CP15_CACHE
#define CONFIG_USE_IRQ
#define CONFIG_STACKSIZE_IRQ (4*1024)
diff --git a/include/configs/gcplus.h b/include/configs/gcplus.h
index 77d4578..b2fbca2 100644
--- a/include/configs/gcplus.h
+++ b/include/configs/gcplus.h
@@ -49,6 +49,8 @@
#define CONFIG_GCPLUS 1 /* on an ADS GCPlus Board */
#undef CONFIG_USE_IRQ /* we don't need IRQ/FIQ stuff */
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
#define CONFIG_CMDLINE_TAG 1 /* enable passing of ATAGs */
#define CONFIG_SETUP_MEMORY_TAGS 1
diff --git a/include/configs/innokom.h b/include/configs/innokom.h
index 895998a..69654c7 100644
--- a/include/configs/innokom.h
+++ b/include/configs/innokom.h
@@ -39,6 +39,10 @@
#undef CONFIG_USE_IRQ /* we don't need IRQ/FIQ stuff */
/* for timer/console/ethernet */
+
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
+
/*
* Hardware drivers
*/
diff --git a/include/configs/lart.h b/include/configs/lart.h
index e34ec22..5d6d460 100644
--- a/include/configs/lart.h
+++ b/include/configs/lart.h
@@ -35,6 +35,8 @@
#define CONFIG_LART 1 /* on an LART Board */
#undef CONFIG_USE_IRQ /* we don't need IRQ/FIQ stuff */
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
/*
* Size of malloc() pool
diff --git a/include/configs/logodl.h b/include/configs/logodl.h
index 9afa800..889a9a3 100644
--- a/include/configs/logodl.h
+++ b/include/configs/logodl.h
@@ -39,6 +39,10 @@
#undef CONFIG_USE_IRQ /* we don't need IRQ/FIQ stuff */
/* for timer/console/ethernet */
+
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
+
/*
* Hardware drivers
*/
diff --git a/include/configs/lubbock.h b/include/configs/lubbock.h
index a4b430b..2cf9c02 100644
--- a/include/configs/lubbock.h
+++ b/include/configs/lubbock.h
@@ -46,6 +46,9 @@
#undef CONFIG_USE_IRQ /* we don't need IRQ/FIQ stuff */
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
+
/*
* Size of malloc() pool
*/
diff --git a/include/configs/pleb2.h b/include/configs/pleb2.h
index ab9ea4f..ed873fa 100644
--- a/include/configs/pleb2.h
+++ b/include/configs/pleb2.h
@@ -42,6 +42,9 @@
#undef CONFIG_USE_IRQ /* we don't need IRQ/FIQ stuff */
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
+
/*
* Size of malloc() pool
*/
diff --git a/include/configs/pxa255_idp.h b/include/configs/pxa255_idp.h
index 5e2e7cf..7485f72 100644
--- a/include/configs/pxa255_idp.h
+++ b/include/configs/pxa255_idp.h
@@ -68,6 +68,9 @@
#undef CONFIG_USE_IRQ /* we don't need IRQ/FIQ stuff */
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
+
/*
* Size of malloc() pool
*/
diff --git a/include/configs/shannon.h b/include/configs/shannon.h
index c8b0b16..13cc5ff 100644
--- a/include/configs/shannon.h
+++ b/include/configs/shannon.h
@@ -44,6 +44,8 @@
#define CONFIG_SHANNON 1 /* on an SHANNON/TuxScreen Board */
#undef CONFIG_USE_IRQ /* we don't need IRQ/FIQ stuff */
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
/*
* Size of malloc() pool
diff --git a/include/configs/trizepsiv.h b/include/configs/trizepsiv.h
index c2744b5..4917318 100644
--- a/include/configs/trizepsiv.h
+++ b/include/configs/trizepsiv.h
@@ -47,6 +47,9 @@
#undef CONFIG_USE_IRQ /* we don't need IRQ/FIQ stuff */
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
+
#define RTC
/*
diff --git a/include/configs/wepep250.h b/include/configs/wepep250.h
index 717577f..9c2a5f8 100644
--- a/include/configs/wepep250.h
+++ b/include/configs/wepep250.h
@@ -27,6 +27,8 @@
#define CONFIG_WEPEP250 1 /* config for wepep250 board */
#undef CONFIG_USE_IRQ /* don't need use IRQ/FIQ */
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
/*
* Select serial console configuration
diff --git a/include/configs/xaeniax.h b/include/configs/xaeniax.h
index 086ca69..1632d29 100644
--- a/include/configs/xaeniax.h
+++ b/include/configs/xaeniax.h
@@ -49,6 +49,9 @@
#undef CONFIG_USE_IRQ /* we don't need IRQ/FIQ stuff */
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
+
/*
* select serial console configuration
*/
diff --git a/include/configs/xm250.h b/include/configs/xm250.h
index 922eb2c..c8bdf31 100644
--- a/include/configs/xm250.h
+++ b/include/configs/xm250.h
@@ -36,6 +36,9 @@
#define CONFIG_XM250 1 /* on a MicroSys XM250 Board */
#undef CONFIG_USE_IRQ /* we don't need IRQ/FIQ stuff */
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
+
/*
* Size of malloc() pool; this lives below the uppermost 128 KiB which are
* used for the RAM copy of the uboot code
diff --git a/include/configs/xsengine.h b/include/configs/xsengine.h
index cad414c..7e2abbf 100644
--- a/include/configs/xsengine.h
+++ b/include/configs/xsengine.h
@@ -35,6 +35,9 @@
#define CONFIG_DOS_PARTITION 1
#define BOARD_LATE_INIT 1
#undef CONFIG_USE_IRQ /* we don't need IRQ/FIQ stuff */
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
+
#define CONFIG_SYS_HZ 1000
#define CONFIG_SYS_CPUSPEED 0x161 /* set core clock to 400/200/100 MHz */
diff --git a/include/configs/zylonite.h b/include/configs/zylonite.h
index 064740d..217636a 100644
--- a/include/configs/zylonite.h
+++ b/include/configs/zylonite.h
@@ -47,6 +47,9 @@
#undef CONFIG_SKIP_RELOCATE_UBOOT
#undef CONFIG_USE_IRQ /* we don't need IRQ/FIQ stuff */
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
+
/*
* Size of malloc() pool
*/
diff --git a/lib_arm/Makefile b/lib_arm/Makefile
index c8795b2..3ac9d1f 100644
--- a/lib_arm/Makefile
+++ b/lib_arm/Makefile
@@ -35,6 +35,9 @@ SOBJS-y += _umodsi3.o
COBJS-y += board.o
COBJS-y += bootm.o
COBJS-y += cache.o
+ifndef CONFIG_SYS_NO_CP15_CACHE
+COBJS-y += cache-cp15.o
+endif
COBJS-y += div0.o
COBJS-y += interrupts.o
diff --git a/cpu/arm926ejs/cpu.c b/lib_arm/cache-cp15.c
similarity index 59%
copy from cpu/arm926ejs/cpu.c
copy to lib_arm/cache-cp15.c
index d1748c9..62ed54f 100644
--- a/cpu/arm926ejs/cpu.c
+++ b/lib_arm/cache-cp15.c
@@ -1,10 +1,6 @@
/*
* (C) Copyright 2002
- * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
- * Marius Groeger <mgroeger at sysgo.de>
- *
- * (C) Copyright 2002
- * Gary Jennejohn, DENX Software Engineering, <gj at denx.de>
+ * Wolfgang Denk, DENX Software Engineering, wd at denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
@@ -25,70 +21,17 @@
* MA 02111-1307 USA
*/
-/*
- * CPU specific code
- */
-
#include <common.h>
-#include <command.h>
-#include <arm926ejs.h>
#include <asm/system.h>
-#ifdef CONFIG_USE_IRQ
-DECLARE_GLOBAL_DATA_PTR;
-#endif
-
+#if !(defined(CONFIG_SYS_NO_ICACHE) && defined(CONFIG_SYS_NO_DCACHE))
static void cp_delay (void)
{
volatile int i;
/* copro seems to need some delay between reading and writing */
- for (i = 0; i < 100; i++);
-}
-
-int cpu_init (void)
-{
- /*
- * setup up stacks if necessary
- */
-#ifdef CONFIG_USE_IRQ
- IRQ_STACK_START = _armboot_start - CONFIG_SYS_MALLOC_LEN - CONFIG_SYS_GBL_DATA_SIZE - 4;
- FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
-#endif
- return 0;
-}
-
-int cleanup_before_linux (void)
-{
- /*
- * this function is called just before we call linux
- * it prepares the processor for linux
- *
- * we turn off caches etc ...
- */
-
- unsigned long i;
-
- disable_interrupts ();
-
- /* turn off I/D-cache */
- asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
- i &= ~(CR_C | CR_I);
- asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
-
- /* flush I/D-cache */
- i = 0;
- asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i));
-
- return (0);
-}
-
-int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
-{
- disable_interrupts ();
- reset_cpu (0);
- /*NOTREACHED*/
- return (0);
+ for (i = 0; i < 100; i++)
+ nop();
}
/* cache_bit must be either CR_I or CR_C */
@@ -110,7 +53,24 @@ static void cache_disable(uint32_t cache_bit)
cp_delay();
set_cr(reg & ~cache_bit);
}
+#endif
+
+#ifdef CONFIG_SYS_NO_ICACHE
+void icache_enable (void)
+{
+ return;
+}
+void icache_disable (void)
+{
+ return;
+}
+
+int icache_status (void)
+{
+ return 0; /* always off */
+}
+#else
void icache_enable(void)
{
cache_enable(CR_I);
@@ -125,7 +85,24 @@ int icache_status(void)
{
return (get_cr() & CR_I) != 0;
}
+#endif
+
+#ifdef CONFIG_SYS_NO_DCACHE
+void dcache_enable (void)
+{
+ return;
+}
+
+void dcache_disable (void)
+{
+ return;
+}
+int dcache_status (void)
+{
+ return 0; /* always off */
+}
+#else
void dcache_enable(void)
{
cache_enable(CR_C);
@@ -140,3 +117,4 @@ int dcache_status(void)
{
return (get_cr() & CR_C) != 0;
}
+#endif
--
1.6.2.1
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