[U-Boot] [PATCH 1/2] ARM: socfpga: Pull PL310 clearing into common code

[Marek Vasut]

Pull the PL310 clearing code into common code, so it can be reused
by Arria10.

Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Chin Liang See <chin.liang.see at intel.com>
Cc: Dalon Westergreen <dwesterg at gmail.com>
Cc: Dinh Nguyen <dinguyen at kernel.org>
Cc: Simon Goldschmidt <simon.k.r.goldschmidt at gmail.com>
Cc: Tien Fong Chee <tien.fong.chee at intel.com>
---
 arch/arm/mach-socfpga/include/mach/misc.h |  1 +
 arch/arm/mach-socfpga/misc.c              | 54 +++++++++++++++++++++++
 arch/arm/mach-socfpga/spl_gen5.c          | 54 -----------------------
 3 files changed, 55 insertions(+), 54 deletions(-)

diff --git a/arch/arm/mach-socfpga/include/mach/misc.h b/arch/arm/mach-socfpga/include/mach/misc.h
index c3ca8cdf3b..27d0b6a370 100644
--- a/arch/arm/mach-socfpga/include/mach/misc.h
+++ b/arch/arm/mach-socfpga/include/mach/misc.h
@@ -40,5 +40,6 @@ void socfpga_sdram_remap_zero(void);
 #endif
 
 void do_bridge_reset(int enable, unsigned int mask);
+void socfpga_pl310_clear(void);
 
 #endif /* _MISC_H_ */
diff --git a/arch/arm/mach-socfpga/misc.c b/arch/arm/mach-socfpga/misc.c
index d887f0201f..410d5a8b49 100644
--- a/arch/arm/mach-socfpga/misc.c
+++ b/arch/arm/mach-socfpga/misc.c
@@ -46,6 +46,60 @@ int dram_init(void)
 	return 0;
 }
 
+void socfpga_pl310_clear(void)
+{
+	u32 mask = 0xff, ena = 0;
+
+	icache_enable();
+
+	/* Disable the L2 cache */
+	clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
+
+	writel(0x0, &pl310->pl310_tag_latency_ctrl);
+	writel(0x10, &pl310->pl310_data_latency_ctrl);
+
+	/* enable BRESP, instruction and data prefetch, full line of zeroes */
+	setbits_le32(&pl310->pl310_aux_ctrl,
+		     L310_AUX_CTRL_DATA_PREFETCH_MASK |
+		     L310_AUX_CTRL_INST_PREFETCH_MASK |
+		     L310_SHARED_ATT_OVERRIDE_ENABLE);
+
+	/* Enable the L2 cache */
+	ena = readl(&pl310->pl310_ctrl);
+	ena |= L2X0_CTRL_EN;
+
+	/*
+	 * Invalidate the PL310 L2 cache. Keep the invalidation code
+	 * entirely in L1 I-cache to avoid any bus traffic through
+	 * the L2.
+	 */
+	asm volatile(
+		".align	5			\n"
+		"	b	3f		\n"
+		"1:	str	%1,	[%4]	\n"
+		"	dsb			\n"
+		"	isb			\n"
+		"	str	%0,	[%2]	\n"
+		"	dsb			\n"
+		"	isb			\n"
+		"2:	ldr	%0,	[%2]	\n"
+		"	cmp	%0,	#0	\n"
+		"	bne	2b		\n"
+		"	str	%0,	[%3]	\n"
+		"	dsb			\n"
+		"	isb			\n"
+		"	b	4f		\n"
+		"3:	b	1b		\n"
+		"4:	nop			\n"
+	: "+r"(mask), "+r"(ena)
+	: "r"(&pl310->pl310_inv_way),
+	  "r"(&pl310->pl310_cache_sync), "r"(&pl310->pl310_ctrl)
+	: "memory", "cc");
+
+	/* Disable the L2 cache */
+	clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
+}
+
 void enable_caches(void)
 {
 #ifndef CONFIG_SYS_ICACHE_OFF
diff --git a/arch/arm/mach-socfpga/spl_gen5.c b/arch/arm/mach-socfpga/spl_gen5.c
index bd2a9fe5ae..65ecba1a31 100644
--- a/arch/arm/mach-socfpga/spl_gen5.c
+++ b/arch/arm/mach-socfpga/spl_gen5.c
@@ -63,60 +63,6 @@ u32 spl_boot_mode(const u32 boot_device)
 }
 #endif
 
-static void socfpga_pl310_clear(void)
-{
-	u32 mask = 0xff, ena = 0;
-
-	icache_enable();
-
-	/* Disable the L2 cache */
-	clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
-
-	writel(0x111, &pl310->pl310_tag_latency_ctrl);
-	writel(0x121, &pl310->pl310_data_latency_ctrl);
-
-	/* enable BRESP, instruction and data prefetch, full line of zeroes */
-	setbits_le32(&pl310->pl310_aux_ctrl,
-		     L310_AUX_CTRL_DATA_PREFETCH_MASK |
-		     L310_AUX_CTRL_INST_PREFETCH_MASK |
-		     L310_SHARED_ATT_OVERRIDE_ENABLE);
-
-	/* Enable the L2 cache */
-	ena = readl(&pl310->pl310_ctrl);
-	ena |= L2X0_CTRL_EN;
-
-	/*
-	 * Invalidate the PL310 L2 cache. Keep the invalidation code
-	 * entirely in L1 I-cache to avoid any bus traffic through
-	 * the L2.
-	 */
-	asm volatile(
-		".align	5			\n"
-		"	b	3f		\n"
-		"1:	str	%1,	[%4]	\n"
-		"	dsb			\n"
-		"	isb			\n"
-		"	str	%0,	[%2]	\n"
-		"	dsb			\n"
-		"	isb			\n"
-		"2:	ldr	%0,	[%2]	\n"
-		"	cmp	%0,	#0	\n"
-		"	bne	2b		\n"
-		"	str	%0,	[%3]	\n"
-		"	dsb			\n"
-		"	isb			\n"
-		"	b	4f		\n"
-		"3:	b	1b		\n"
-		"4:	nop			\n"
-	: "+r"(mask), "+r"(ena)
-	: "r"(&pl310->pl310_inv_way),
-	  "r"(&pl310->pl310_cache_sync), "r"(&pl310->pl310_ctrl)
-	: "memory", "cc");
-
-	/* Disable the L2 cache */
-	clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
-}
-
 void board_init_f(ulong dummy)
 {
 	const struct cm_config *cm_default_cfg = cm_get_default_config();
-- 
2.20.1