Michal Simek | 6d5af1a | 2009-03-27 14:25:20 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> |
| 3 | * Copyright (C) 2007-2009 PetaLogix |
| 4 | * Copyright (C) 2006 Atmark Techno, Inc. |
| 5 | * |
| 6 | * This file is subject to the terms and conditions of the GNU General Public |
| 7 | * License. See the file "COPYING" in the main directory of this archive |
| 8 | * for more details. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/linkage.h> |
| 12 | #include <asm/thread_info.h> |
| 13 | #include <asm/page.h> |
| 14 | |
| 15 | .text |
| 16 | ENTRY(_start) |
| 17 | mfs r1, rmsr |
| 18 | andi r1, r1, ~2 |
| 19 | mts rmsr, r1 |
| 20 | |
| 21 | /* save fdt to kernel location */ |
| 22 | /* r7 stores pointer to fdt blob */ |
| 23 | beqi r7, no_fdt_arg |
| 24 | or r11, r0, r0 /* incremment */ |
| 25 | ori r4, r0, TOPHYS(_fdt_start) /* save bram context */ |
| 26 | ori r3, r0, (0x4000 - 4) |
| 27 | _copy_fdt: |
| 28 | lw r12, r7, r11 /* r12 = r7 + r11 */ |
| 29 | sw r12, r4, r11 /* addr[r4 + r11] = r12 */ |
| 30 | addik r11, r11, 4 /* increment counting */ |
| 31 | bgtid r3, _copy_fdt /* loop for all entries */ |
| 32 | addik r3, r3, -4 /* descrement loop */ |
| 33 | no_fdt_arg: |
| 34 | |
| 35 | /* Initialize small data anchors */ |
| 36 | la r13, r0, _KERNEL_SDA_BASE_ |
| 37 | la r2, r0, _KERNEL_SDA2_BASE_ |
| 38 | |
| 39 | /* Initialize stack pointer */ |
| 40 | la r1, r0, init_thread_union + THREAD_SIZE - 4 |
| 41 | |
| 42 | /* Initialize r31 with current task address */ |
| 43 | la r31, r0, init_task |
| 44 | |
| 45 | /* |
| 46 | * Call platform dependent initialize function. |
| 47 | * Please see $(ARCH)/mach-$(SUBARCH)/setup.c for |
| 48 | * the function. |
| 49 | */ |
| 50 | la r8, r0, machine_early_init |
| 51 | brald r15, r8 |
| 52 | nop |
| 53 | |
| 54 | la r15, r0, machine_halt |
| 55 | braid start_kernel |
| 56 | nop |