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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/arm/mach-omap2/omap4-common.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/arm/mach-omap2/omap4-common.c')
-rw-r--r--kernel/arch/arm/mach-omap2/omap4-common.c231
1 files changed, 231 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-omap2/omap4-common.c b/kernel/arch/arm/mach-omap2/omap4-common.c
new file mode 100644
index 000000000..16350eefa
--- /dev/null
+++ b/kernel/arch/arm/mach-omap2/omap4-common.c
@@ -0,0 +1,231 @@
+/*
+ * OMAP4 specific common source file.
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ * Author:
+ * Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ *
+ * This program is free software,you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/platform_device.h>
+#include <linux/memblock.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/export.h>
+#include <linux/irqchip/arm-gic.h>
+#include <linux/of_address.h>
+#include <linux/reboot.h>
+#include <linux/genalloc.h>
+
+#include <asm/hardware/cache-l2x0.h>
+#include <asm/mach/map.h>
+#include <asm/memblock.h>
+#include <asm/smp_twd.h>
+
+#include "omap-wakeupgen.h"
+#include "soc.h"
+#include "iomap.h"
+#include "common.h"
+#include "prminst44xx.h"
+#include "prcm_mpu44xx.h"
+#include "omap4-sar-layout.h"
+#include "omap-secure.h"
+#include "sram.h"
+
+#ifdef CONFIG_CACHE_L2X0
+static void __iomem *l2cache_base;
+#endif
+
+static void __iomem *sar_ram_base;
+static void __iomem *gic_dist_base_addr;
+static void __iomem *twd_base;
+
+#define IRQ_LOCALTIMER 29
+
+void gic_dist_disable(void)
+{
+ if (gic_dist_base_addr)
+ writel_relaxed(0x0, gic_dist_base_addr + GIC_DIST_CTRL);
+}
+
+void gic_dist_enable(void)
+{
+ if (gic_dist_base_addr)
+ writel_relaxed(0x1, gic_dist_base_addr + GIC_DIST_CTRL);
+}
+
+bool gic_dist_disabled(void)
+{
+ return !(readl_relaxed(gic_dist_base_addr + GIC_DIST_CTRL) & 0x1);
+}
+
+void gic_timer_retrigger(void)
+{
+ u32 twd_int = readl_relaxed(twd_base + TWD_TIMER_INTSTAT);
+ u32 gic_int = readl_relaxed(gic_dist_base_addr + GIC_DIST_PENDING_SET);
+ u32 twd_ctrl = readl_relaxed(twd_base + TWD_TIMER_CONTROL);
+
+ if (twd_int && !(gic_int & BIT(IRQ_LOCALTIMER))) {
+ /*
+ * The local timer interrupt got lost while the distributor was
+ * disabled. Ack the pending interrupt, and retrigger it.
+ */
+ pr_warn("%s: lost localtimer interrupt\n", __func__);
+ writel_relaxed(1, twd_base + TWD_TIMER_INTSTAT);
+ if (!(twd_ctrl & TWD_TIMER_CONTROL_PERIODIC)) {
+ writel_relaxed(1, twd_base + TWD_TIMER_COUNTER);
+ twd_ctrl |= TWD_TIMER_CONTROL_ENABLE;
+ writel_relaxed(twd_ctrl, twd_base + TWD_TIMER_CONTROL);
+ }
+ }
+}
+
+#ifdef CONFIG_CACHE_L2X0
+
+void __iomem *omap4_get_l2cache_base(void)
+{
+ return l2cache_base;
+}
+
+void omap4_l2c310_write_sec(unsigned long val, unsigned reg)
+{
+ unsigned smc_op;
+
+ switch (reg) {
+ case L2X0_CTRL:
+ smc_op = OMAP4_MON_L2X0_CTRL_INDEX;
+ break;
+
+ case L2X0_AUX_CTRL:
+ smc_op = OMAP4_MON_L2X0_AUXCTRL_INDEX;
+ break;
+
+ case L2X0_DEBUG_CTRL:
+ smc_op = OMAP4_MON_L2X0_DBG_CTRL_INDEX;
+ break;
+
+ case L310_PREFETCH_CTRL:
+ smc_op = OMAP4_MON_L2X0_PREFETCH_INDEX;
+ break;
+
+ case L310_POWER_CTRL:
+ pr_info_once("OMAP L2C310: ROM does not support power control setting\n");
+ return;
+
+ default:
+ WARN_ONCE(1, "OMAP L2C310: ignoring write to reg 0x%x\n", reg);
+ return;
+ }
+
+ omap_smc1(smc_op, val);
+}
+
+int __init omap_l2_cache_init(void)
+{
+ /* Static mapping, never released */
+ l2cache_base = ioremap(OMAP44XX_L2CACHE_BASE, SZ_4K);
+ if (WARN_ON(!l2cache_base))
+ return -ENOMEM;
+ return 0;
+}
+#endif
+
+void __iomem *omap4_get_sar_ram_base(void)
+{
+ return sar_ram_base;
+}
+
+/*
+ * SAR RAM used to save and restore the HW
+ * context in low power modes
+ */
+static int __init omap4_sar_ram_init(void)
+{
+ unsigned long sar_base;
+
+ /*
+ * To avoid code running on other OMAPs in
+ * multi-omap builds
+ */
+ if (cpu_is_omap44xx())
+ sar_base = OMAP44XX_SAR_RAM_BASE;
+ else if (soc_is_omap54xx())
+ sar_base = OMAP54XX_SAR_RAM_BASE;
+ else
+ return -ENOMEM;
+
+ /* Static mapping, never released */
+ sar_ram_base = ioremap(sar_base, SZ_16K);
+ if (WARN_ON(!sar_ram_base))
+ return -ENOMEM;
+
+ return 0;
+}
+omap_early_initcall(omap4_sar_ram_init);
+
+static const struct of_device_id intc_match[] = {
+ { .compatible = "ti,omap4-wugen-mpu", },
+ { .compatible = "ti,omap5-wugen-mpu", },
+ { },
+};
+
+static struct device_node *intc_node;
+
+unsigned int omap4_xlate_irq(unsigned int hwirq)
+{
+ struct of_phandle_args irq_data;
+ unsigned int irq;
+
+ if (!intc_node)
+ intc_node = of_find_matching_node(NULL, intc_match);
+
+ if (WARN_ON(!intc_node))
+ return hwirq;
+
+ irq_data.np = intc_node;
+ irq_data.args_count = 3;
+ irq_data.args[0] = 0;
+ irq_data.args[1] = hwirq - OMAP44XX_IRQ_GIC_START;
+ irq_data.args[2] = IRQ_TYPE_LEVEL_HIGH;
+
+ irq = irq_create_of_mapping(&irq_data);
+ if (WARN_ON(!irq))
+ irq = hwirq;
+
+ return irq;
+}
+
+void __init omap_gic_of_init(void)
+{
+ struct device_node *np;
+
+ intc_node = of_find_matching_node(NULL, intc_match);
+ if (WARN_ON(!intc_node)) {
+ pr_err("No WUGEN found in DT, system will misbehave.\n");
+ pr_err("UPDATE YOUR DEVICE TREE!\n");
+ }
+
+ /* Extract GIC distributor and TWD bases for OMAP4460 ROM Errata WA */
+ if (!cpu_is_omap446x())
+ goto skip_errata_init;
+
+ np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-gic");
+ gic_dist_base_addr = of_iomap(np, 0);
+ WARN_ON(!gic_dist_base_addr);
+
+ np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-twd-timer");
+ twd_base = of_iomap(np, 0);
+ WARN_ON(!twd_base);
+
+skip_errata_init:
+ irqchip_init();
+}