Use CONFIG_ARC_DBG_IOC_ENABLE Kconfig option instead of
ioc_enable global variable.
Signed-off-by: Eugeniy Paltsev <eugeniy.palt...@synopsys.com>
---
arch/arc/Kconfig | 18 ++++++++++++++++
arch/arc/include/asm/cache.h | 5 +++++
arch/arc/lib/cache.c | 49 ++++++++++++++++++++++++++------------------
3 files changed, 52 insertions(+), 20 deletions(-)
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index e3f9db7..cc96fa8 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -116,6 +116,24 @@ config SYS_DCACHE_OFF
bool "Do not use Data Cache"
default n
+menuconfig ARC_DBG
+ bool "ARC debugging"
+ default y
+
+if ARC_DBG
+
+config ARC_DBG_IOC_ENABLE
+ bool "Enable IO coherency unit"
+ depends on CPU_ARCHS38
+ default n
+ help
+ Enable IO coherency unit to debug problems with caches and
+ DMA peripherals.
+ NOTE: as of today linux will not work properly if this option
+ is enabled in u-boot!
+
+endif
+
choice
prompt "Target select"
default TARGET_AXS103
diff --git a/arch/arc/include/asm/cache.h b/arch/arc/include/asm/cache.h
index 382c412..fe75409 100644
--- a/arch/arc/include/asm/cache.h
+++ b/arch/arc/include/asm/cache.h
@@ -32,6 +32,11 @@
void cache_init(void);
void flush_n_invalidate_dcache_all(void);
+static const inline int is_ioc_enabled(void)
+{
+ return IS_ENABLED(CONFIG_ARC_DBG_IOC_ENABLE);
+}
+
#endif /* __ASSEMBLY__ */
#endif /* __ASM_ARC_CACHE_H */
diff --git a/arch/arc/lib/cache.c b/arch/arc/lib/cache.c
index d31606c..df269cf 100644
--- a/arch/arc/lib/cache.c
+++ b/arch/arc/lib/cache.c
@@ -33,18 +33,8 @@ DECLARE_GLOBAL_DATA_PTR;
#define SLC_CTRL_BUSY 0x100
#define SLC_CTRL_RGN_OP_INV 0x200
-/*
- * By default that variable will fall into .bss section.
- * But .bss section is not relocated and so it will be initilized before
- * relocation but will be used after being zeroed.
- */
#define CACHE_LINE_MASK (~(gd->arch.l1_line_sz - 1))
-bool ioc_exists __section(".data") = false;
-
-/* To force enable IOC set ioc_enable to 'true' */
-bool ioc_enable __section(".data") = false;
-
static inline bool pae_exists(void)
{
/* TODO: should we compare mmu version from BCR and from CONFIG? */
@@ -88,6 +78,30 @@ static inline bool slc_exists(void)
return false;
}
+static inline bool ioc_exists(void)
+{
+ if (is_isa_arcv2()) {
+ union bcr_clust_cfg cbcr;
+
+ cbcr.word = read_aux_reg(ARC_BCR_CLUSTER);
+ return cbcr.fields.c;
+ }
+
+ return false;
+}
+
+static inline bool ioc_status(void)
+{
+ /*
+ * We check only CONFIG option instead of IOC HW state check as IOC
+ * must be disabled by default.
+ */
+ if (is_ioc_enabled())
+ return ioc_exists();
+
+ return false;
+}
+
static inline bool slc_status(void)
{
/* TODO: HS 3.0 supports SLC disable so we need to check it here */
@@ -213,16 +227,11 @@ static void arc_ioc_setup(void)
static void read_decode_cache_bcr_arcv2(void)
{
union bcr_slc_cfg slc_cfg;
- union bcr_clust_cfg cbcr;
if (slc_exists()) {
slc_cfg.word = read_aux_reg(ARC_AUX_SLC_CONFIG);
gd->arch.slc_line_sz = (slc_cfg.fields.lsz == 0) ? 128 : 64;
}
-
- cbcr.word = read_aux_reg(ARC_BCR_CLUSTER);
- if (cbcr.fields.c && ioc_enable)
- ioc_exists = true;
}
void read_decode_cache_bcr(void)
@@ -255,7 +264,7 @@ void cache_init(void)
if (is_isa_arcv2())
read_decode_cache_bcr_arcv2();
- if (is_isa_arcv2() && ioc_exists)
+ if (is_isa_arcv2() && ioc_status())
arc_ioc_setup();
/*
@@ -432,10 +441,10 @@ void invalidate_dcache_range(unsigned long start,
unsigned long end)
* ARCv2 && no IOC -> call __dc_line_op; call __slc_rgn_op
* ARCv2 && IOC enabled -> nothing
*/
- if (!is_isa_arcv2() || !ioc_exists)
+ if (!is_isa_arcv2() || !ioc_status())
__dc_line_op(start, end - start, OP_INV);
- if (is_isa_arcv2() && !ioc_exists)
+ if (is_isa_arcv2() && !ioc_status())
__slc_rgn_op(start, end - start, OP_INV);
}
@@ -449,10 +458,10 @@ void flush_dcache_range(unsigned long start, unsigned
long end)
* ARCv2 && no IOC -> call __dc_line_op; call __slc_rgn_op
* ARCv2 && IOC enabled -> nothing
*/
- if (!is_isa_arcv2() || !ioc_exists)
+ if (!is_isa_arcv2() || !ioc_status())
__dc_line_op(start, end - start, OP_FLUSH);
- if (is_isa_arcv2() && !ioc_exists)
+ if (is_isa_arcv2() && !ioc_status())
__slc_rgn_op(start, end - start, OP_FLUSH);
}
--
2.9.3
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