avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/arch/powerpc/cpu/ppc4xx/uic.c

@@ -0,0 +1,164 @@
+/*
+ * (C) Copyright 2000-2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2002 (440 port)
+ * Scott McNutt, Artesyn Communication Producs, smcnutt@artsyncp.com
+ *
+ * (C) Copyright 2003 (440GX port)
+ * Travis B. Sawyer, Sandburst Corporation, tsawyer@sandburst.com
+ *
+ * (C) Copyright 2008 (PPC440X05 port for Virtex 5 FX)
+ * Ricardo Ribalda-Universidad Autonoma de Madrid-ricardo.ribalda@gmail.com
+ * Work supported by Qtechnology (htpp://qtec.com)
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <watchdog.h>
+#include <command.h>
+#include <asm/processor.h>
+#include <asm/interrupt.h>
+#include <asm/ppc4xx.h>
+#include <ppc_asm.tmpl>
+#include <commproc.h>
+
+#if (UIC_MAX > 3)
+#define UICB0_ALL	(UIC_MASK(VECNUM_UIC1CI) | UIC_MASK(VECNUM_UIC1NCI) | \
+			 UIC_MASK(VECNUM_UIC2CI) | UIC_MASK(VECNUM_UIC2NCI) | \
+			 UIC_MASK(VECNUM_UIC3CI) | UIC_MASK(VECNUM_UIC3NCI))
+#elif (UIC_MAX > 2)
+#define UICB0_ALL	(UIC_MASK(VECNUM_UIC1CI) | UIC_MASK(VECNUM_UIC1NCI) | \
+			 UIC_MASK(VECNUM_UIC2CI) | UIC_MASK(VECNUM_UIC2NCI))
+#elif (UIC_MAX > 1)
+#define UICB0_ALL	(UIC_MASK(VECNUM_UIC1CI) | UIC_MASK(VECNUM_UIC1NCI))
+#else
+#define UICB0_ALL	0
+#endif
+
+u32 get_dcr(u16);
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void pic_enable(void)
+{
+#if (UIC_MAX > 1)
+	/* Install the UIC1 handlers */
+	irq_install_handler(VECNUM_UIC1NCI, (void *)(void *)external_interrupt, 0);
+	irq_install_handler(VECNUM_UIC1CI, (void *)(void *)external_interrupt, 0);
+#endif
+#if (UIC_MAX > 2)
+	irq_install_handler(VECNUM_UIC2NCI, (void *)(void *)external_interrupt, 0);
+	irq_install_handler(VECNUM_UIC2CI, (void *)(void *)external_interrupt, 0);
+#endif
+#if (UIC_MAX > 3)
+	irq_install_handler(VECNUM_UIC3NCI, (void *)(void *)external_interrupt, 0);
+	irq_install_handler(VECNUM_UIC3CI, (void *)(void *)external_interrupt, 0);
+#endif
+}
+
+/* Handler for UIC interrupt */
+static void uic_interrupt(u32 uic_base, int vec_base)
+{
+	u32 uic_msr;
+	u32 msr_shift;
+	int vec;
+
+	/*
+	 * Read masked interrupt status register to determine interrupt source
+	 */
+	uic_msr = get_dcr(uic_base + UIC_MSR);
+	msr_shift = uic_msr;
+	vec = vec_base;
+
+	while (msr_shift != 0) {
+		if (msr_shift & 0x80000000)
+			interrupt_run_handler(vec);
+		/*
+		 * Shift msr to next position and increment vector
+		 */
+		msr_shift <<= 1;
+		vec++;
+	}
+}
+
+/*
+ * Handle external interrupts
+ */
+void external_interrupt(struct pt_regs *regs)
+{
+	u32 uic_msr;
+
+	/*
+	 * Read masked interrupt status register to determine interrupt source
+	 */
+	uic_msr = mfdcr(UIC0MSR);
+
+#if (UIC_MAX > 1)
+	if ((UIC_MASK(VECNUM_UIC1CI) & uic_msr) ||
+	    (UIC_MASK(VECNUM_UIC1NCI) & uic_msr))
+		uic_interrupt(UIC1_DCR_BASE, 32);
+#endif
+
+#if (UIC_MAX > 2)
+	if ((UIC_MASK(VECNUM_UIC2CI) & uic_msr) ||
+	    (UIC_MASK(VECNUM_UIC2NCI) & uic_msr))
+		uic_interrupt(UIC2_DCR_BASE, 64);
+#endif
+
+#if (UIC_MAX > 3)
+	if ((UIC_MASK(VECNUM_UIC3CI) & uic_msr) ||
+	    (UIC_MASK(VECNUM_UIC3NCI) & uic_msr))
+		uic_interrupt(UIC3_DCR_BASE, 96);
+#endif
+
+	mtdcr(UIC0SR, (uic_msr & UICB0_ALL));
+
+	if (uic_msr & ~(UICB0_ALL))
+		uic_interrupt(UIC0_DCR_BASE, 0);
+
+	return;
+}
+
+void pic_irq_ack(unsigned int vec)
+{
+	if ((vec >= 0) && (vec < 32))
+		mtdcr(UIC0SR, UIC_MASK(vec));
+	else if ((vec >= 32) && (vec < 64))
+		mtdcr(UIC1SR, UIC_MASK(vec));
+	else if ((vec >= 64) && (vec < 96))
+		mtdcr(UIC2SR, UIC_MASK(vec));
+	else if (vec >= 96)
+		mtdcr(UIC3SR, UIC_MASK(vec));
+}
+
+/*
+ * Install and free a interrupt handler.
+ */
+void pic_irq_enable(unsigned int vec)
+{
+
+	if ((vec >= 0) && (vec < 32))
+		mtdcr(UIC0ER, mfdcr(UIC0ER) | UIC_MASK(vec));
+	else if ((vec >= 32) && (vec < 64))
+		mtdcr(UIC1ER, mfdcr(UIC1ER) | UIC_MASK(vec));
+	else if ((vec >= 64) && (vec < 96))
+		mtdcr(UIC2ER, mfdcr(UIC2ER) | UIC_MASK(vec));
+	else if (vec >= 96)
+		mtdcr(UIC3ER, mfdcr(UIC3ER) | UIC_MASK(vec));
+
+	debug("Install interrupt vector %d\n", vec);
+}
+
+void pic_irq_disable(unsigned int vec)
+{
+	if ((vec >= 0) && (vec < 32))
+		mtdcr(UIC0ER, mfdcr(UIC0ER) & ~UIC_MASK(vec));
+	else if ((vec >= 32) && (vec < 64))
+		mtdcr(UIC1ER, mfdcr(UIC1ER) & ~UIC_MASK(vec));
+	else if ((vec >= 64) && (vec < 96))
+		mtdcr(UIC2ER, mfdcr(UIC2ER) & ~UIC_MASK(vec));
+	else if (vec >= 96)
+		mtdcr(UIC3ER, mfdcr(UIC3ER) & ~UIC_MASK(vec));
+}