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Diffstat (limited to 'arch/arm/mach-omap2/omap4-common.c')
-rw-r--r--arch/arm/mach-omap2/omap4-common.c69
1 files changed, 63 insertions, 6 deletions
diff --git a/arch/arm/mach-omap2/omap4-common.c b/arch/arm/mach-omap2/omap4-common.c
index e1f289748c5..6897ae21bb8 100644
--- a/arch/arm/mach-omap2/omap4-common.c
+++ b/arch/arm/mach-omap2/omap4-common.c
@@ -14,6 +14,7 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
+#include <linux/irq.h>
#include <linux/platform_device.h>
#include <linux/memblock.h>
#include <linux/of_irq.h>
@@ -24,23 +25,29 @@
#include <asm/hardware/cache-l2x0.h>
#include <asm/mach/map.h>
#include <asm/memblock.h>
-
-#include <plat/sram.h>
-#include <plat/omap-secure.h>
-#include <plat/mmc.h>
+#include <asm/smp_twd.h>
#include "omap-wakeupgen.h"
-
#include "soc.h"
+#include "iomap.h"
#include "common.h"
+#include "mmc.h"
#include "hsmmc.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
#ifdef CONFIG_OMAP4_ERRATA_I688
/* Used to implement memory barrier on DRAM path */
@@ -95,12 +102,14 @@ void __init omap_barriers_init(void)
void __init gic_init_irq(void)
{
void __iomem *omap_irq_base;
- void __iomem *gic_dist_base_addr;
/* Static mapping, never released */
gic_dist_base_addr = ioremap(OMAP44XX_GIC_DIST_BASE, SZ_4K);
BUG_ON(!gic_dist_base_addr);
+ twd_base = ioremap(OMAP44XX_LOCAL_TWD_BASE, SZ_4K);
+ BUG_ON(!twd_base);
+
/* Static mapping, never released */
omap_irq_base = ioremap(OMAP44XX_GIC_CPU_BASE, SZ_512);
BUG_ON(!omap_irq_base);
@@ -110,6 +119,38 @@ void __init gic_init_irq(void)
gic_init(0, 29, gic_dist_base_addr, omap_irq_base);
}
+void gic_dist_disable(void)
+{
+ if (gic_dist_base_addr)
+ __raw_writel(0x0, gic_dist_base_addr + GIC_DIST_CTRL);
+}
+
+bool gic_dist_disabled(void)
+{
+ return !(__raw_readl(gic_dist_base_addr + GIC_DIST_CTRL) & 0x1);
+}
+
+void gic_timer_retrigger(void)
+{
+ u32 twd_int = __raw_readl(twd_base + TWD_TIMER_INTSTAT);
+ u32 gic_int = __raw_readl(gic_dist_base_addr + GIC_DIST_PENDING_SET);
+ u32 twd_ctrl = __raw_readl(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__);
+ __raw_writel(1, twd_base + TWD_TIMER_INTSTAT);
+ if (!(twd_ctrl & TWD_TIMER_CONTROL_PERIODIC)) {
+ __raw_writel(1, twd_base + TWD_TIMER_COUNTER);
+ twd_ctrl |= TWD_TIMER_CONTROL_ENABLE;
+ __raw_writel(twd_ctrl, twd_base + TWD_TIMER_CONTROL);
+ }
+ }
+}
+
#ifdef CONFIG_CACHE_L2X0
void __iomem *omap4_get_l2cache_base(void)
@@ -281,3 +322,19 @@ int __init omap4_twl6030_hsmmc_init(struct omap2_hsmmc_info *controllers)
return 0;
}
#endif
+
+/**
+ * omap44xx_restart - trigger a software restart of the SoC
+ * @mode: the "reboot mode", see arch/arm/kernel/{setup,process}.c
+ * @cmd: passed from the userspace program rebooting the system (if provided)
+ *
+ * Resets the SoC. For @cmd, see the 'reboot' syscall in
+ * kernel/sys.c. No return value.
+ */
+void omap44xx_restart(char mode, const char *cmd)
+{
+ /* XXX Should save 'cmd' into scratchpad for use after reboot */
+ omap4_prminst_global_warm_sw_reset(); /* never returns */
+ while (1);
+}
+