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/board/amcc/yosemite/Kconfig

@@ -0,0 +1,16 @@
+if TARGET_YOSEMITE
+
+config SYS_BOARD
+	default "yosemite"
+
+config SYS_VENDOR
+	default "amcc"
+
+config SYS_CONFIG_NAME
+	default "yosemite"
+
+config DISPLAY_BOARDINFO
+	bool
+	default y
+
+endif

u-boot/board/amcc/yosemite/MAINTAINERS

@@ -0,0 +1,7 @@
+YOSEMITE BOARD
+M:	Stefan Roese <sr@denx.de>
+S:	Maintained
+F:	board/amcc/yosemite/
+F:	include/configs/yosemite.h
+F:	configs/yellowstone_defconfig
+F:	configs/yosemite_defconfig

u-boot/board/amcc/yosemite/Makefile

@@ -0,0 +1,9 @@
+#
+# (C) Copyright 2002-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	= yosemite.o
+extra-y	+= init.o

u-boot/board/amcc/yosemite/config.mk

@@ -0,0 +1,16 @@
+#
+# (C) Copyright 2002
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+PLATFORM_CPPFLAGS += -DCONFIG_440=1
+
+ifeq ($(debug),1)
+PLATFORM_CPPFLAGS += -DDEBUG
+endif
+
+ifeq ($(dbcr),1)
+PLATFORM_CPPFLAGS += -DCONFIG_SYS_INIT_DBCR=0x8cff0000
+endif

u-boot/board/amcc/yosemite/init.S

@@ -0,0 +1,49 @@
+/*
+ * SPDX-License-Identifier:	GPL-2.0+
+*/
+
+#include <asm-offsets.h>
+#include <ppc_asm.tmpl>
+#include <asm/mmu.h>
+#include <config.h>
+
+/**************************************************************************
+ * TLB TABLE
+ *
+ * This table is used by the cpu boot code to setup the initial tlb
+ * entries. Rather than make broad assumptions in the cpu source tree,
+ * this table lets each board set things up however they like.
+ *
+ *  Pointer to the table is returned in r1
+ *
+ *************************************************************************/
+
+    .section .bootpg,"ax"
+    .globl tlbtab
+
+tlbtab:
+    tlbtab_start
+
+    /*
+     * BOOT_CS (FLASH) must be first. Before relocation SA_I can be off to use the
+     * speed up boot process. It is patched after relocation to enable SA_I
+     */
+    tlbentry( CONFIG_SYS_BOOT_BASE_ADDR, SZ_256M, CONFIG_SYS_BOOT_BASE_ADDR, 0, AC_RWX | SA_G/*|SA_I*/)
+
+    /* TLB-entry for init-ram in dcache (SA_I must be turned off!) */
+    tlbentry( CONFIG_SYS_INIT_RAM_ADDR, SZ_64K, CONFIG_SYS_INIT_RAM_ADDR, 0, AC_RWX | SA_G )
+
+    tlbentry( CONFIG_SYS_SDRAM_BASE, SZ_256M, CONFIG_SYS_SDRAM_BASE, 0, AC_RWX | SA_IG )
+    tlbentry( CONFIG_SYS_PCI_BASE, SZ_256M, CONFIG_SYS_PCI_BASE, 0, AC_RW | SA_IG )
+    tlbentry( CONFIG_SYS_NVRAM_BASE_ADDR, SZ_256M, CONFIG_SYS_NVRAM_BASE_ADDR, 0, AC_RWX | SA_W|SA_I )
+
+    /* PCI */
+    tlbentry( CONFIG_SYS_PCI_MEMBASE, SZ_256M, CONFIG_SYS_PCI_MEMBASE, 0, AC_RW | SA_IG )
+    tlbentry( CONFIG_SYS_PCI_MEMBASE1, SZ_256M, CONFIG_SYS_PCI_MEMBASE1, 0, AC_RW | SA_IG )
+    tlbentry( CONFIG_SYS_PCI_MEMBASE2, SZ_256M, CONFIG_SYS_PCI_MEMBASE2, 0, AC_RW | SA_IG )
+    tlbentry( CONFIG_SYS_PCI_MEMBASE3, SZ_256M, CONFIG_SYS_PCI_MEMBASE3, 0, AC_RW | SA_IG )
+
+    /* USB 2.0 Device */
+    tlbentry( CONFIG_SYS_USB_DEVICE, SZ_1K, 0x50000000, 0, AC_RW | SA_IG )
+
+    tlbtab_end

u-boot/board/amcc/yosemite/yosemite.c

@@ -0,0 +1,357 @@
+/*
+ * (C) Copyright 2006-2007
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/ppc4xx.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <spd_sdram.h>
+#include <libfdt.h>
+#include <fdt_support.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+extern flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips	*/
+
+static inline u32 get_async_pci_freq(void)
+{
+	if (in_8((void *)(CONFIG_SYS_BCSR_BASE + 5)) &
+		CONFIG_SYS_BCSR5_PCI66EN)
+		return 66666666;
+	else
+		return 33333333;
+}
+
+int board_early_init_f(void)
+{
+	register uint reg;
+
+	/*--------------------------------------------------------------------
+	 * Setup the external bus controller/chip selects
+	 *-------------------------------------------------------------------*/
+	mtdcr(EBC0_CFGADDR, EBC0_CFG);
+	reg = mfdcr(EBC0_CFGDATA);
+	mtdcr(EBC0_CFGDATA, reg | 0x04000000);	/* Set ATC */
+
+	/*--------------------------------------------------------------------
+	 * Setup the GPIO pins
+	 *-------------------------------------------------------------------*/
+	/*CPLD cs */
+	/*setup Address lines for flash size 64Meg. */
+	out32(GPIO0_OSRL, in32(GPIO0_OSRL) | 0x50010000);
+	out32(GPIO0_TSRL, in32(GPIO0_TSRL) | 0x50010000);
+	out32(GPIO0_ISR1L, in32(GPIO0_ISR1L) | 0x50000000);
+
+	/*setup emac */
+	out32(GPIO0_TCR, in32(GPIO0_TCR) | 0xC080);
+	out32(GPIO0_TSRL, in32(GPIO0_TSRL) | 0x40);
+	out32(GPIO0_ISR1L, in32(GPIO0_ISR1L) | 0x55);
+	out32(GPIO0_OSRH, in32(GPIO0_OSRH) | 0x50004000);
+	out32(GPIO0_ISR1H, in32(GPIO0_ISR1H) | 0x00440000);
+
+	/*UART1 */
+	out32(GPIO1_TCR, in32(GPIO1_TCR) | 0x02000000);
+	out32(GPIO1_OSRL, in32(GPIO1_OSRL) | 0x00080000);
+	out32(GPIO1_ISR2L, in32(GPIO1_ISR2L) | 0x00010000);
+
+	/* external interrupts IRQ0...3 */
+	out32(GPIO1_TCR, in32(GPIO1_TCR) & ~0x00f00000);
+	out32(GPIO1_TSRL, in32(GPIO1_TSRL) & ~0x0000ff00);
+	out32(GPIO1_ISR1L, in32(GPIO1_ISR1L) | 0x00005500);
+
+#ifdef CONFIG_440EP
+	/*setup USB 2.0 */
+	out32(GPIO1_TCR, in32(GPIO1_TCR) | 0xc0000000);
+	out32(GPIO1_OSRL, in32(GPIO1_OSRL) | 0x50000000);
+	out32(GPIO0_TCR, in32(GPIO0_TCR) | 0xf);
+	out32(GPIO0_OSRH, in32(GPIO0_OSRH) | 0xaa);
+	out32(GPIO0_ISR2H, in32(GPIO0_ISR2H) | 0x00000500);
+#endif
+
+	/*--------------------------------------------------------------------
+	 * Setup the interrupt controller polarities, triggers, etc.
+	 *-------------------------------------------------------------------*/
+	mtdcr(UIC0SR, 0xffffffff);	/* clear all */
+	mtdcr(UIC0ER, 0x00000000);	/* disable all */
+	mtdcr(UIC0CR, 0x00000009);	/* ATI & UIC1 crit are critical */
+	mtdcr(UIC0PR, 0xfffffe13);	/* per ref-board manual */
+	mtdcr(UIC0TR, 0x01c00008);	/* per ref-board manual */
+	mtdcr(UIC0VR, 0x00000001);	/* int31 highest, base=0x000 */
+	mtdcr(UIC0SR, 0xffffffff);	/* clear all */
+
+	mtdcr(UIC1SR, 0xffffffff);	/* clear all */
+	mtdcr(UIC1ER, 0x00000000);	/* disable all */
+	mtdcr(UIC1CR, 0x00000000);	/* all non-critical */
+	mtdcr(UIC1PR, 0xffffe0ff);	/* per ref-board manual */
+	mtdcr(UIC1TR, 0x00ffc000);	/* per ref-board manual */
+	mtdcr(UIC1VR, 0x00000001);	/* int31 highest, base=0x000 */
+	mtdcr(UIC1SR, 0xffffffff);	/* clear all */
+
+	/*--------------------------------------------------------------------
+	 * Setup other serial configuration
+	 *-------------------------------------------------------------------*/
+	mfsdr(SDR0_PCI0, reg);
+	mtsdr(SDR0_PCI0, 0x80000000 | reg);	/* PCI arbiter enabled */
+	mtsdr(SDR0_PFC0, 0x00003e00);	/* Pin function */
+	mtsdr(SDR0_PFC1, 0x00048000);	/* Pin function: UART0 has 4 pins */
+
+	/* Check and reconfigure the PCI sync clock if necessary */
+	ppc4xx_pci_sync_clock_config(get_async_pci_freq());
+
+	/*clear tmrclk divisor */
+	*(unsigned char *)(CONFIG_SYS_BCSR_BASE | 0x04) = 0x00;
+
+	/*enable ethernet */
+	*(unsigned char *)(CONFIG_SYS_BCSR_BASE | 0x08) = 0xf0;
+
+#ifdef CONFIG_440EP
+	/*enable usb 1.1 fs device and remove usb 2.0 reset */
+	*(unsigned char *)(CONFIG_SYS_BCSR_BASE | 0x09) = 0x00;
+#endif
+
+	/*get rid of flash write protect */
+	*(unsigned char *)(CONFIG_SYS_BCSR_BASE | 0x07) = 0x00;
+
+	return 0;
+}
+
+int misc_init_r (void)
+{
+	uint pbcr;
+	int size_val = 0;
+
+	/* Re-do sizing to get full correct info */
+	mtdcr(EBC0_CFGADDR, PB0CR);
+	pbcr = mfdcr(EBC0_CFGDATA);
+	switch (gd->bd->bi_flashsize) {
+	case 1 << 20:
+		size_val = 0;
+		break;
+	case 2 << 20:
+		size_val = 1;
+		break;
+	case 4 << 20:
+		size_val = 2;
+		break;
+	case 8 << 20:
+		size_val = 3;
+		break;
+	case 16 << 20:
+		size_val = 4;
+		break;
+	case 32 << 20:
+		size_val = 5;
+		break;
+	case 64 << 20:
+		size_val = 6;
+		break;
+	case 128 << 20:
+		size_val = 7;
+		break;
+	}
+	pbcr = (pbcr & 0x0001ffff) | gd->bd->bi_flashstart | (size_val << 17);
+	mtdcr(EBC0_CFGADDR, PB0CR);
+	mtdcr(EBC0_CFGDATA, pbcr);
+
+	/* adjust flash start and offset */
+	gd->bd->bi_flashstart = 0 - gd->bd->bi_flashsize;
+	gd->bd->bi_flashoffset = 0;
+
+	/* Monitor protection ON by default */
+	(void)flash_protect(FLAG_PROTECT_SET,
+			    -CONFIG_SYS_MONITOR_LEN,
+			    0xffffffff,
+			    &flash_info[0]);
+
+	return 0;
+}
+
+int checkboard(void)
+{
+	char buf[64];
+	int i = getenv_f("serial#", buf, sizeof(buf));
+	u8 rev;
+	u32 clock = get_async_pci_freq();
+
+#ifdef CONFIG_440EP
+	printf("Board: Yosemite - AMCC PPC440EP Evaluation Board");
+#else
+	printf("Board: Yellowstone - AMCC PPC440GR Evaluation Board");
+#endif
+
+	rev = in_8((void *)(CONFIG_SYS_BCSR_BASE + 0));
+	printf(", Rev. %X, PCI-Async=%d MHz", rev, clock / 1000000);
+
+	if (i > 0) {
+		puts(", serial# ");
+		puts(buf);
+	}
+	putc('\n');
+
+	/*
+	 * Reconfiguration of the PCI sync clock is already done,
+	 * now check again if everything is in range:
+	 */
+	if (ppc4xx_pci_sync_clock_config(clock)) {
+		printf("ERROR: PCI clocking incorrect (async=%d "
+		       "sync=%ld)!\n", clock, get_PCI_freq());
+	}
+
+	return (0);
+}
+
+/*************************************************************************
+ *  initdram -- doesn't use serial presence detect.
+ *
+ *  Assumes:    256 MB, ECC, non-registered
+ *              PLB @ 133 MHz
+ *
+ ************************************************************************/
+#define NUM_TRIES 64
+#define NUM_READS 10
+
+void sdram_tr1_set(int ram_address, int* tr1_value)
+{
+	int i;
+	int j, k;
+	volatile unsigned int* ram_pointer =  (unsigned int*)ram_address;
+	int first_good = -1, last_bad = 0x1ff;
+
+	unsigned long test[NUM_TRIES] = {
+		0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFF,
+		0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFF,
+		0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000,
+		0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000,
+		0xAAAAAAAA, 0xAAAAAAAA, 0x55555555, 0x55555555,
+		0xAAAAAAAA, 0xAAAAAAAA, 0x55555555, 0x55555555,
+		0x55555555, 0x55555555, 0xAAAAAAAA, 0xAAAAAAAA,
+		0x55555555, 0x55555555, 0xAAAAAAAA, 0xAAAAAAAA,
+		0xA5A5A5A5, 0xA5A5A5A5, 0x5A5A5A5A, 0x5A5A5A5A,
+		0xA5A5A5A5, 0xA5A5A5A5, 0x5A5A5A5A, 0x5A5A5A5A,
+		0x5A5A5A5A, 0x5A5A5A5A, 0xA5A5A5A5, 0xA5A5A5A5,
+		0x5A5A5A5A, 0x5A5A5A5A, 0xA5A5A5A5, 0xA5A5A5A5,
+		0xAA55AA55, 0xAA55AA55, 0x55AA55AA, 0x55AA55AA,
+		0xAA55AA55, 0xAA55AA55, 0x55AA55AA, 0x55AA55AA,
+		0x55AA55AA, 0x55AA55AA, 0xAA55AA55, 0xAA55AA55,
+		0x55AA55AA, 0x55AA55AA, 0xAA55AA55, 0xAA55AA55 };
+
+	/* go through all possible SDRAM0_TR1[RDCT] values */
+	for (i=0; i<=0x1ff; i++) {
+		/* set the current value for TR1 */
+		mtsdram(SDRAM0_TR1, (0x80800800 | i));
+
+		/* write values */
+		for (j=0; j<NUM_TRIES; j++) {
+			ram_pointer[j] = test[j];
+
+			/* clear any cache at ram location */
+			__asm__("dcbf 0,%0": :"r" (&ram_pointer[j]));
+		}
+
+		/* read values back */
+		for (j=0; j<NUM_TRIES; j++) {
+			for (k=0; k<NUM_READS; k++) {
+				/* clear any cache at ram location */
+				__asm__("dcbf 0,%0": :"r" (&ram_pointer[j]));
+
+				if (ram_pointer[j] != test[j])
+					break;
+			}
+
+			/* read error */
+			if (k != NUM_READS) {
+				break;
+			}
+		}
+
+		/* we have a SDRAM0_TR1[RDCT] that is part of the window */
+		if (j == NUM_TRIES) {
+			if (first_good == -1)
+				first_good = i;		/* found beginning of window */
+		} else { /* bad read */
+			/* if we have not had a good read then don't care */
+			if(first_good != -1) {
+				/* first failure after a good read */
+				last_bad = i-1;
+				break;
+			}
+		}
+	}
+
+	/* return the current value for TR1 */
+	*tr1_value = (first_good + last_bad) / 2;
+}
+
+phys_size_t initdram(int board)
+{
+	register uint reg;
+	int tr1_bank1, tr1_bank2;
+
+	/*--------------------------------------------------------------------
+	 * Setup some default
+	 *------------------------------------------------------------------*/
+	mtsdram(SDRAM0_UABBA, 0x00000000);	/* ubba=0 (default)             */
+	mtsdram(SDRAM0_SLIO, 0x00000000);	/* rdre=0 wrre=0 rarw=0         */
+	mtsdram(SDRAM0_DEVOPT, 0x00000000);	/* dll=0 ds=0 (normal)          */
+	mtsdram(SDRAM0_CLKTR, 0x40000000);	/* ?? */
+	mtsdram(SDRAM0_WDDCTR, 0x40000000);	/* ?? */
+
+	/*clear this first, if the DDR is enabled by a debugger
+	  then you can not make changes. */
+	mtsdram(SDRAM0_CFG0, 0x00000000);	/* Disable EEC */
+
+	/*--------------------------------------------------------------------
+	 * Setup for board-specific specific mem
+	 *------------------------------------------------------------------*/
+	/*
+	 * Following for CAS Latency = 2.5 @ 133 MHz PLB
+	 */
+	mtsdram(SDRAM0_B0CR, 0x000a4001);	/* SDBA=0x000 128MB, Mode 3, enabled */
+	mtsdram(SDRAM0_B1CR, 0x080a4001);	/* SDBA=0x080 128MB, Mode 3, enabled */
+
+	mtsdram(SDRAM0_TR0, 0x410a4012);	/* ?? */
+	mtsdram(SDRAM0_RTR, 0x04080000);	/* ?? */
+	mtsdram(SDRAM0_CFG1, 0x00000000);	/* Self-refresh exit, disable PM    */
+	mtsdram(SDRAM0_CFG0, 0x30000000);	/* Disable EEC */
+	udelay(400);		/* Delay 200 usecs (min)            */
+
+	/*--------------------------------------------------------------------
+	 * Enable the controller, then wait for DCEN to complete
+	 *------------------------------------------------------------------*/
+	mtsdram(SDRAM0_CFG0, 0x80000000);	/* Enable */
+
+	for (;;) {
+		mfsdram(SDRAM0_MCSTS, reg);
+		if (reg & 0x80000000)
+			break;
+	}
+
+	sdram_tr1_set(0x00000000, &tr1_bank1);
+	sdram_tr1_set(0x08000000, &tr1_bank2);
+	mtsdram(SDRAM0_TR1, (((tr1_bank1+tr1_bank2)/2) | 0x80800800));
+
+	return CONFIG_SYS_SDRAM_BANKS * (CONFIG_SYS_KBYTES_SDRAM * 1024);	/* return bytes */
+}
+
+/*************************************************************************
+ *  hw_watchdog_reset
+ *
+ *	This routine is called to reset (keep alive) the watchdog timer
+ *
+ ************************************************************************/
+#if defined(CONFIG_HW_WATCHDOG)
+void hw_watchdog_reset(void)
+{
+
+}
+#endif
+
+void board_reset(void)
+{
+	/* give reset to BCSR */
+	*(unsigned char *)(CONFIG_SYS_BCSR_BASE | 0x06) = 0x09;
+}