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 <aalo...@freescale.com>
---
arch/arm/cpu/armv7/mx6/soc.c | 95 ---------------------------------------
arch/arm/imx-common/Makefile | 1 +
arch/arm/imx-common/cache.c | 103 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 104 insertions(+), 95 deletions(-)
create mode 100644 arch/arm/imx-common/cache.c
diff --git a/arch/arm/cpu/armv7/mx6/soc.c b/arch/arm/cpu/armv7/mx6/soc.c
index 5110112..2f7d5c8 100644
--- 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
--- 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
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 */
--
2.1.4
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