arm: imx: common rework cache settings for imx6

Rework cache settings for imx6, move cache configuration
to imx-common/cache.c so it can be reused for newer SoC

Signed-off-by: Adrian Alonso <aalonso@freescale.com>

diff --git a/arch/arm/cpu/armv7/mx6/soc.c b/arch/arm/cpu/armv7/mx6/soc.c
index 5110112..2f7d5c8 100644 (file)
--- a/arch/arm/cpu/armv7/mx6/soc.c
+++ b/arch/arm/cpu/armv7/mx6/soc.c
@@ -8,9 +8,6 @@
  */
 
 #include <common.h>
-#include <asm/armv7.h>
-#include <asm/bootm.h>
-#include <asm/pl310.h>
 #include <asm/errno.h>
 #include <asm/io.h>
 #include <asm/arch/imx-regs.h>
@@ -440,31 +437,6 @@ int board_postclk_init(void)
        return 0;
 }
 
-#ifndef CONFIG_SYS_DCACHE_OFF
-void enable_caches(void)
-{
-#if defined(CONFIG_SYS_ARM_CACHE_WRITETHROUGH)
-       enum dcache_option option = DCACHE_WRITETHROUGH;
-#else
-       enum dcache_option option = DCACHE_WRITEBACK;
-#endif
-
-       /* Avoid random hang when download by usb */
-       invalidate_dcache_all();
-
-       /* Enable D-cache. I-cache is already enabled in start.S */
-       dcache_enable();
-
-       /* Enable caching on OCRAM and ROM */
-       mmu_set_region_dcache_behaviour(ROMCP_ARB_BASE_ADDR,
-                                       ROMCP_ARB_END_ADDR,
-                                       option);
-       mmu_set_region_dcache_behaviour(IRAM_BASE_ADDR,
-                                       IRAM_SIZE,
-                                       option);
-}
-#endif
-
 #if defined(CONFIG_FEC_MXC)
 void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
 {
@@ -605,70 +577,3 @@ void imx_setup_hdmi(void)
        writel(reg, &mxc_ccm->chsccdr);
 }
 #endif
-
-#ifndef CONFIG_SYS_L2CACHE_OFF
-#define IOMUXC_GPR11_L2CACHE_AS_OCRAM 0x00000002
-void v7_outer_cache_enable(void)
-{
-       struct pl310_regs *const pl310 = (struct pl310_regs *)L2_PL310_BASE;
-       unsigned int val;
-
-
-       /*
-        * Set bit 22 in the auxiliary control register. If this bit
-        * is cleared, PL310 treats Normal Shared Non-cacheable
-        * accesses as Cacheable no-allocate.
-        */
-       setbits_le32(&pl310->pl310_aux_ctrl, L310_SHARED_ATT_OVERRIDE_ENABLE);
-
-#if defined CONFIG_MX6SL
-       struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
-       val = readl(&iomux->gpr[11]);
-       if (val & IOMUXC_GPR11_L2CACHE_AS_OCRAM) {
-               /* L2 cache configured as OCRAM, reset it */
-               val &= ~IOMUXC_GPR11_L2CACHE_AS_OCRAM;
-               writel(val, &iomux->gpr[11]);
-       }
-#endif
-
-       /* Must disable the L2 before changing the latency parameters */
-       clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
-
-       writel(0x132, &pl310->pl310_tag_latency_ctrl);
-       writel(0x132, &pl310->pl310_data_latency_ctrl);
-
-       val = readl(&pl310->pl310_prefetch_ctrl);
-
-       /* Turn on the L2 I/D prefetch */
-       val |= 0x30000000;
-
-       /*
-        * The L2 cache controller(PL310) version on the i.MX6D/Q is r3p1-50rel0
-        * The L2 cache controller(PL310) version on the i.MX6DL/SOLO/SL is r3p2
-        * But according to ARM PL310 errata: 752271
-        * ID: 752271: Double linefill feature can cause data corruption
-        * Fault Status: Present in: r3p0, r3p1, r3p1-50rel0. Fixed in r3p2
-        * Workaround: The only workaround to this erratum is to disable the
-        * double linefill feature. This is the default behavior.
-        */
-
-#ifndef CONFIG_MX6Q
-       val |= 0x40800000;
-#endif
-       writel(val, &pl310->pl310_prefetch_ctrl);
-
-       val = readl(&pl310->pl310_power_ctrl);
-       val |= L2X0_DYNAMIC_CLK_GATING_EN;
-       val |= L2X0_STNDBY_MODE_EN;
-       writel(val, &pl310->pl310_power_ctrl);
-
-       setbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
-}
-
-void v7_outer_cache_disable(void)
-{
-       struct pl310_regs *const pl310 = (struct pl310_regs *)L2_PL310_BASE;
-
-       clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
-}
-#endif /* !CONFIG_SYS_L2CACHE_OFF */

diff --git a/arch/arm/imx-common/Makefile b/arch/arm/imx-common/Makefile
index b9f1ca4..3b034e1 100644 (file)
--- a/arch/arm/imx-common/Makefile
+++ b/arch/arm/imx-common/Makefile
@@ -19,6 +19,7 @@ obj-y += misc.o
 obj-$(CONFIG_SPL_BUILD)        += spl.o
 endif
 ifeq ($(SOC),$(filter $(SOC),mx6))
+obj-y  += cache.o
 obj-$(CONFIG_CMD_SATA) += sata.o
 obj-$(CONFIG_IMX_VIDEO_SKIP) += video.o
 endif

diff --git a/arch/arm/imx-common/cache.c b/arch/arm/imx-common/cache.c
new file mode 100644 (file)
index 0000000..54b021c
--- /dev/null
+++ b/arch/arm/imx-common/cache.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/armv7.h>
+#include <asm/pl310.h>
+#include <asm/io.h>
+
+#ifndef CONFIG_SYS_DCACHE_OFF
+void enable_caches(void)
+{
+#if defined(CONFIG_SYS_ARM_CACHE_WRITETHROUGH)
+       enum dcache_option option = DCACHE_WRITETHROUGH;
+#else
+       enum dcache_option option = DCACHE_WRITEBACK;
+#endif
+       /* Avoid random hang when download by usb */
+       invalidate_dcache_all();
+
+       /* Enable D-cache. I-cache is already enabled in start.S */
+       dcache_enable();
+
+       /* Enable caching on OCRAM and ROM */
+       mmu_set_region_dcache_behaviour(ROMCP_ARB_BASE_ADDR,
+                                       ROMCP_ARB_END_ADDR,
+                                       option);
+       mmu_set_region_dcache_behaviour(IRAM_BASE_ADDR,
+                                       IRAM_SIZE,
+                                       option);
+}
+#endif
+
+#ifndef CONFIG_SYS_L2CACHE_OFF
+#ifdef CONFIG_SYS_L2_PL310
+#define IOMUXC_GPR11_L2CACHE_AS_OCRAM 0x00000002
+void v7_outer_cache_enable(void)
+{
+       struct pl310_regs *const pl310 = (struct pl310_regs *)L2_PL310_BASE;
+       unsigned int val;
+
+
+       /*
+        * Set bit 22 in the auxiliary control register. If this bit
+        * is cleared, PL310 treats Normal Shared Non-cacheable
+        * accesses as Cacheable no-allocate.
+        */
+       setbits_le32(&pl310->pl310_aux_ctrl, L310_SHARED_ATT_OVERRIDE_ENABLE);
+
+#if defined CONFIG_MX6SL
+       struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
+       val = readl(&iomux->gpr[11]);
+       if (val & IOMUXC_GPR11_L2CACHE_AS_OCRAM) {
+               /* L2 cache configured as OCRAM, reset it */
+               val &= ~IOMUXC_GPR11_L2CACHE_AS_OCRAM;
+               writel(val, &iomux->gpr[11]);
+       }
+#endif
+
+       /* Must disable the L2 before changing the latency parameters */
+       clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
+
+       writel(0x132, &pl310->pl310_tag_latency_ctrl);
+       writel(0x132, &pl310->pl310_data_latency_ctrl);
+
+       val = readl(&pl310->pl310_prefetch_ctrl);
+
+       /* Turn on the L2 I/D prefetch */
+       val |= 0x30000000;
+
+       /*
+        * The L2 cache controller(PL310) version on the i.MX6D/Q is r3p1-50rel0
+        * The L2 cache controller(PL310) version on the i.MX6DL/SOLO/SL is r3p2
+        * But according to ARM PL310 errata: 752271
+        * ID: 752271: Double linefill feature can cause data corruption
+        * Fault Status: Present in: r3p0, r3p1, r3p1-50rel0. Fixed in r3p2
+        * Workaround: The only workaround to this erratum is to disable the
+        * double linefill feature. This is the default behavior.
+        */
+
+#ifndef CONFIG_MX6Q
+       val |= 0x40800000;
+#endif
+       writel(val, &pl310->pl310_prefetch_ctrl);
+
+       val = readl(&pl310->pl310_power_ctrl);
+       val |= L2X0_DYNAMIC_CLK_GATING_EN;
+       val |= L2X0_STNDBY_MODE_EN;
+       writel(val, &pl310->pl310_power_ctrl);
+
+       setbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
+}
+
+void v7_outer_cache_disable(void)
+{
+       struct pl310_regs *const pl310 = (struct pl310_regs *)L2_PL310_BASE;
+
+       clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
+}
+#endif /* !CONFIG_SYS_L2_PL310 */
+#endif /* !CONFIG_SYS_L2CACHE_OFF */