projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 2f16ac9d AB |
1 | /* |
| 2 | * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * SPDX-License-Identifier: GPL-2.0+ | |
| 5 | */ | |
| 6 | ||
| 7 | #include <asm-offsets.h> | |
| 8 | #include <config.h> | |
| 4d93617d | 9 | #include <linux/linkage.h> |
| 2f16ac9d AB |
10 | #include <asm/arcregs.h> |
| 11 | ||
| 4d93617d | 12 | ENTRY(_start) |
| 20a58ac0 IG |
13 | /* Setup interrupt vector base that matches "__text_start" */ |
| 14 | sr __ivt_start, [ARC_AUX_INTR_VEC_BASE] | |
| 15 | ||
| 3fb80163 | 16 | /* Setup stack- and frame-pointers */ |
| 20a58ac0 IG |
17 | mov %sp, CONFIG_SYS_INIT_SP_ADDR |
| 18 | mov %fp, %sp | |
| 19 | ||
| 3fb80163 AB |
20 | /* Unconditionally disable caches */ |
| 21 | bl flush_dcache_all | |
| 22 | bl dcache_disable | |
| 23 | bl icache_disable | |
| 20a58ac0 | 24 | |
| f56d625e AB |
25 | /* Allocate and zero GD, update SP */ |
| 26 | mov %r0, %sp | |
| 27 | bl board_init_f_mem | |
| 28 | ||
| 29 | /* Update stack- and frame-pointers */ | |
| 30 | mov %sp, %r0 | |
| 31 | mov %fp, %sp | |
| 32 | ||
| 20a58ac0 IG |
33 | /* Zero the one and only argument of "board_init_f" */ |
| 34 | mov_s %r0, 0 | |
| 35 | j board_init_f | |
| 4d93617d | 36 | ENDPROC(_start) |
| 20a58ac0 | 37 | |
| 2f16ac9d | 38 | /* |
| 3fb80163 | 39 | * void board_init_f_r_trampoline(stack-pointer address) |
| 2f16ac9d AB |
40 | * |
| 41 | * This "function" does not return, instead it continues in RAM | |
| 42 | * after relocating the monitor code. | |
| 43 | * | |
| 3fb80163 | 44 | * r0 = new stack-pointer |
| 2f16ac9d | 45 | */ |
| 3fb80163 AB |
46 | ENTRY(board_init_f_r_trampoline) |
| 47 | /* Set up the stack- and frame-pointers */ | |
| 48 | mov %sp, %r0 | |
| 2f16ac9d AB |
49 | mov %fp, %sp |
| 50 | ||
| 3fb80163 AB |
51 | /* Update position of intterupt vector table */ |
| 52 | lr %r0, [ARC_AUX_INTR_VEC_BASE] | |
| 53 | ld %r1, [%r25, GD_RELOC_OFF] | |
| 54 | add %r0, %r0, %r1 | |
| 55 | sr %r0, [ARC_AUX_INTR_VEC_BASE] | |
| 2f16ac9d | 56 | |
| 3fb80163 AB |
57 | /* Re-enter U-Boot by calling board_init_f_r */ |
| 58 | j board_init_f_r | |
| 59 | ENDPROC(board_init_f_r_trampoline) |