2 * armboot - Startup Code for ARM1176 CPU-core
4 * Copyright (c) 2007 Samsung Electronics
7 * Guennadi Liakhovetki, DENX Software Engineering, <lg@denx.de>
9 * SPDX-License-Identifier: GPL-2.0+
11 * 2007-09-21 - Restructured codes by jsgood (jsgood.yang@samsung.com)
12 * 2007-09-21 - Added MoviNAND and OneNAND boot codes by
13 * jsgood (jsgood.yang@samsung.com)
14 * Base codes by scsuh (sc.suh)
17 #include <asm-offsets.h>
20 #ifndef CONFIG_SYS_PHY_UBOOT_BASE
21 #define CONFIG_SYS_PHY_UBOOT_BASE CONFIG_SYS_UBOOT_BASE
25 *************************************************************************
27 * Startup Code (reset vector)
29 * do important init only if we don't start from memory!
30 * setup Memory and board specific bits prior to relocation.
31 * relocate armboot to ram
34 *************************************************************************
41 * set the cpu to SVC32 mode
49 *************************************************************************
51 * CPU_init_critical registers
53 * setup important registers
56 *************************************************************************
59 * we do sys-critical inits only at reboot,
60 * not when booting from ram!
64 * When booting from NAND - it has definitely been a reset, so, no need
65 * to flush caches and disable the MMU
67 #ifndef CONFIG_SPL_BUILD
72 mcr p15, 0, r0, c7, c7, 0 /* flush v3/v4 cache */
73 mcr p15, 0, r0, c8, c7, 0 /* flush v4 TLB */
76 * disable MMU stuff and caches
78 mrc p15, 0, r0, c1, c0, 0
79 bic r0, r0, #0x00002300 @ clear bits 13, 9:8 (--V- --RS)
80 bic r0, r0, #0x00000087 @ clear bits 7, 2:0 (B--- -CAM)
81 orr r0, r0, #0x00000002 @ set bit 2 (A) Align
82 orr r0, r0, #0x00001000 @ set bit 12 (I) I-Cache
84 /* Prepare to disable the MMU */
85 adr r2, mmu_disable_phys
86 sub r2, r2, #(CONFIG_SYS_PHY_UBOOT_BASE - CONFIG_SYS_TEXT_BASE)
90 /* Run in a single cache-line */
92 mcr p15, 0, r0, c1, c0, 0
101 * Go setup Memory and board specific bits prior to relocation.
103 bl lowlevel_init /* go setup pll,mux,memory */
107 /*------------------------------------------------------------------------------*/
109 .globl c_runtime_cpu_setup