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/sequoia/init.S

@@ -0,0 +1,79 @@
+/*
+ * (C) Copyright 2008
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * 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
+
+	/* vxWorks needs this as first entry for the Machine Check interrupt */
+	tlbentry( 0x40000000, SZ_256M, 0, 0, AC_RWX | SA_IG )
+
+	/*
+	 * The RAM-boot version skips the SDRAM TLB (identified by EPN=0). This
+	 * entry is already configured for SDRAM via the JTAG debugger and mustn't
+	 * be re-initialized by this RAM-booting U-Boot version.
+	 */
+#ifndef CONFIG_SYS_RAMBOOT
+	/* TLB-entry for DDR SDRAM (Up to 2GB) */
+#ifdef CONFIG_4xx_DCACHE
+	tlbentry( CONFIG_SYS_SDRAM_BASE, SZ_256M, CONFIG_SYS_SDRAM_BASE, 0, AC_RWX | SA_G)
+#else
+	tlbentry( CONFIG_SYS_SDRAM_BASE, SZ_256M, CONFIG_SYS_SDRAM_BASE, 0, AC_RWX | SA_IG )
+#endif
+#endif /* CONFIG_SYS_RAMBOOT */
+
+	/* TLB-entry for EBC */
+	tlbentry( CONFIG_SYS_BCSR_BASE, SZ_256M, CONFIG_SYS_BCSR_BASE, 1, AC_RWX | SA_IG )
+
+	/* BOOT_CS (FLASH) must be forth. 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, 1, AC_RWX | SA_G )
+
+#ifdef CONFIG_SYS_INIT_RAM_DCACHE
+	/* 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 )
+#endif
+
+	/* TLB-entry for PCI Memory */
+	tlbentry( CONFIG_SYS_PCI_MEMBASE, SZ_256M, CONFIG_SYS_PCI_MEMBASE, 1, AC_RW | SA_IG )
+	tlbentry( CONFIG_SYS_PCI_MEMBASE1, SZ_256M, CONFIG_SYS_PCI_MEMBASE1, 1, AC_RW | SA_IG )
+	tlbentry( CONFIG_SYS_PCI_MEMBASE2, SZ_256M, CONFIG_SYS_PCI_MEMBASE2, 1, AC_RW | SA_IG )
+	tlbentry( CONFIG_SYS_PCI_MEMBASE3, SZ_256M, CONFIG_SYS_PCI_MEMBASE3, 1, AC_RW | SA_IG )
+
+	/* TLB-entry for NAND */
+	tlbentry( CONFIG_SYS_NAND_ADDR, SZ_1K, CONFIG_SYS_NAND_ADDR, 1, AC_RWX | SA_IG )
+
+	/* TLB-entry for Internal Registers & OCM */
+	tlbentry( 0xe0000000, SZ_16M, 0xe0000000, 0,  AC_RWX | SA_I )
+
+	/*TLB-entry PCI registers*/
+	tlbentry( 0xEEC00000, SZ_1K, 0xEEC00000, 1,  AC_RWX | SA_IG )
+
+	/* TLB-entry for peripherals */
+	tlbentry( 0xEF000000, SZ_16M, 0xEF000000, 1, AC_RWX | SA_IG)
+
+	/* TLB-entry PCI IO Space - from sr@denx.de */
+	tlbentry(0xE8000000, SZ_64K, 0xE8000000, 1, AC_RWX | SA_IG)
+
+	tlbtab_end