LEON: added new drivers to the LEON2/LEON3 BSPs

Most drivers use the Driver Manager for device probing, they
work on AMBA-over-PCI systems if PCI is big-endian.

New APIs:
 * GPIO Library, interfaced to GRGPIO
 * GENIRQ, Generic interrupt service implementation helper

New GRLIB Drivers:
 * ACTEL 1553 RT, user interface is similar to 1553 BRM driver
 * GR1553 (1553 BC, RT and BM core)
 * AHBSTAT (AHB error status core)
 * GRADCDAC (Core interfacing to ADC/DAC hardware)
 * GRGPIO (GPIO port accessed from GPIO Library)
 * MCTRL (Memory controller settings configuration)
 * GRETH (10/100/1000 Ethernet driver using Driver manager)
 * GRPWM (Pulse Width Modulation core)
 * SPICTRL (SPI master interface)
 * GRSPW_ROUTER (SpaceWire Router AMBA configuration interface)
 * GRCTM (SpaceCraft on-board Time Management core)
 * SPWCUC (Time distribution over SpaceWire)
 * GRTC (SpaceCraft up-link Tele core)
 * GRTM (SpaceCraft down-link Tele Metry core)

GR712RC ASIC specific interfaces:
 * GRASCS
 * CANMUX (select between OCCAN and SATCAN)
 * SATCAN
 * SLINK

1 files changed, 206 insertions, 0 deletions

diff --git a/c/src/lib/libbsp/sparc/shared/amba/ahbstat.c b/c/src/lib/libbsp/sparc/shared/amba/ahbstat.c
new file mode 100644
index 0000000000..0fe96cd26f
--- /dev/null
+++ b/c/src/lib/libbsp/sparc/shared/amba/ahbstat.c
@@ -0,0 +1,206 @@
+/*  AHB Status register driver
+ *
+ *  COPYRIGHT (c) 2009.
+ *  Cobham Gaisler AB.
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ */
+
+#include <stdint.h>
+#include <drvmgr/drvmgr.h>
+#include <drvmgr/ambapp_bus.h>
+
+#include <ahbstat.h>
+
+void ahbstat_isr(void *arg);
+
+/* AHB fail interrupt callback to user. This function is declared weak so that
+ * the user can define a function pointer variable containing the address
+ * responsible for handling errors
+ *
+ * minor              Index of AHBSTAT hardware
+ * regs               Register address of AHBSTAT
+ * status             AHBSTAT status register at IRQ
+ * failing_address    AHBSTAT Failing address register at IRQ
+ *
+ * * User return 
+ *  0: print error onto terminal with printk and reenable AHBSTAT
+ *  1: just re-enable AHBSTAT
+ *  2: just print error
+ *  3: do nothing, let user do custom handling
+ */
+int (*ahbstat_error)(
+	int minor,
+	struct ahbstat_regs *regs,
+	uint32_t status,
+	uint32_t failing_address
+	) __attribute__((weak)) = NULL;
+
+#define AHBSTAT_STS_CE_BIT 9
+#define AHBSTAT_STS_NE_BIT 8
+#define AHBSTAT_STS_HW_BIT 7
+#define AHBSTAT_STS_HM_BIT 3
+#define AHBSTAT_STS_HS_BIT 0
+
+#define AHBSTAT_STS_CE (1 << AHBSTAT_STS_CE_BIT)
+#define AHBSTAT_STS_NE (1 << AHBSTAT_STS_NE_BIT)
+#define AHBSTAT_STS_HW (1 << AHBSTAT_STS_HW_BIT)
+#define AHBSTAT_STS_HM (0xf << AHBSTAT_STS_HM_BIT)
+#define AHBSTAT_STS_HS (0x7 << AHBSTAT_STS_HS_BIT)
+
+struct ahbstat_priv {
+	struct drvmgr_dev *dev;
+	struct ahbstat_regs *regs;
+	int minor;
+	uint32_t last_status;
+	uint32_t last_address;
+};
+
+int ahbstat_init2(struct drvmgr_dev *dev);
+
+struct drvmgr_drv_ops ahbstat_ops =
+{
+	.init = {NULL, ahbstat_init2, NULL, NULL},
+	.remove = NULL,
+	.info = NULL
+};
+
+struct amba_dev_id ahbstat_ids[] =
+{
+	{VENDOR_GAISLER, GAISLER_AHBSTAT},
+	{0, 0}		/* Mark end of table */
+};
+
+struct amba_drv_info ahbstat_drv_info =
+{
+	{
+		DRVMGR_OBJ_DRV,			/* Driver */
+		NULL,				/* Next driver */
+		NULL,				/* Device list */
+		DRIVER_AMBAPP_GAISLER_AHBSTAT_ID,/* Driver ID */
+		"AHBSTAT_DRV",			/* Driver Name */
+		DRVMGR_BUS_TYPE_AMBAPP,		/* Bus Type */
+		&ahbstat_ops,
+		NULL,				/* Funcs */
+		0,				/* No devices yet */
+		sizeof(struct ahbstat_priv),
+	},
+	&ahbstat_ids[0]
+};
+
+void ahbstat_register_drv (void)
+{
+	drvmgr_drv_register(&ahbstat_drv_info.general);
+}
+
+int ahbstat_init2(struct drvmgr_dev *dev)
+{
+	struct ahbstat_priv *priv;
+	struct amba_dev_info *ambadev;
+
+	priv = dev->priv;
+	if (!priv)
+		return DRVMGR_NOMEM;
+	priv->dev = dev;
+
+	/* Get device information from AMBA PnP information */
+	ambadev = (struct amba_dev_info *)dev->businfo;
+	if (ambadev == NULL)
+		return DRVMGR_FAIL;
+	priv->regs = (struct ahbstat_regs *)ambadev->info.apb_slv->start;
+	priv->minor = dev->minor_drv;
+
+	/* Initialize hardware */
+	priv->regs->status = 0;
+
+	/* Install IRQ handler */
+	drvmgr_interrupt_register(dev, 0, "ahbstat", ahbstat_isr, priv);
+
+	return DRVMGR_OK;
+}
+
+void ahbstat_isr(void *arg)
+{
+	struct ahbstat_priv *priv = arg;
+	uint32_t fadr, status;
+	int rc;
+
+	/* Get hardware status */
+	status = priv->regs->status;
+	if ((status & AHBSTAT_STS_NE) == 0)
+		return;
+
+	/* IRQ generated by AHBSTAT core... handle it here */
+
+	/* Get Failing address */
+	fadr = priv->regs->failing;
+
+	priv->last_status = status;
+	priv->last_address = fadr;
+
+	/* Let user handle error, default to print the error and reenable HW
+	 *
+	 * User return 
+	 *  0: print error and reenable AHBSTAT
+	 *  1: just reenable AHBSTAT
+	 *  2: just print error reenable
+	 *  3: do nothing
+	 */
+	rc = 0;
+	if (ahbstat_error != NULL)
+		rc = ahbstat_error(priv->minor, priv->regs, status, fadr);
+
+	if ((rc & 0x1) == 0) {
+		printk("\n### AHBSTAT: %s %s error of size %lu by master %d"
+			" at 0x%08lx\n",
+			status & AHBSTAT_STS_CE ? "single" : "non-correctable",
+			status & AHBSTAT_STS_HW ? "write" : "read",
+			(status & AHBSTAT_STS_HS) >> AHBSTAT_STS_HS_BIT,
+			(status & AHBSTAT_STS_HM) >> AHBSTAT_STS_HM_BIT,
+			fadr);
+	}
+
+	if ((rc & 0x2) == 0) {
+		/* Trigger new interrupts */
+		priv->regs->status = 0;
+	}
+}
+
+/* Get Last received AHB Error
+ *
+ * Return
+ *   0: No error received
+ *   1: Error Received, last status and address stored into argument pointers
+ *  -1: No such AHBSTAT device
+ */
+int ahbstat_last_error(int minor, uint32_t *status, uint32_t *address)
+{
+	struct drvmgr_dev *dev;
+	struct ahbstat_priv *priv;
+
+	if (drvmgr_get_dev(&ahbstat_drv_info.general, minor, &dev)) {
+		return -1;
+	}
+	priv = (struct ahbstat_priv *)dev->priv;
+
+	*status = priv->last_status;
+	*address = priv->last_address;
+
+	return (priv->last_status & AHBSTAT_STS_NE) >> AHBSTAT_STS_NE_BIT;
+}
+
+/* Get AHBSTAT registers address from minor. NULL returned if no such device */
+struct ahbstat_regs *ahbstat_get_regs(int minor)
+{
+	struct drvmgr_dev *dev;
+	struct ahbstat_priv *priv;
+
+	if (drvmgr_get_dev(&ahbstat_drv_info.general, minor, &dev)) {
+		return NULL;
+	}
+	priv = (struct ahbstat_priv *)dev->priv;
+
+	return priv->regs;
+}