| /* |
| * Copyright (C) 2012 Altera Corporation <www.altera.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <config.h> |
| #include <version.h> |
| |
| /* Save the parameter pass in by previous boot loader */ |
| .global save_boot_params |
| save_boot_params: |
| /* save the parameter here */ |
| |
| /* |
| * Setup stack for exception, which is located |
| * at the end of on-chip RAM. We don't expect exception prior to |
| * relocation and if that happens, we won't worry -- it will overide |
| * global data region as the code will goto reset. After relocation, |
| * this region won't be used by other part of program. |
| * Hence it is safe. |
| */ |
| ldr r0, =(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_SIZE) |
| ldr r1, =IRQ_STACK_START_IN |
| str r0, [r1] |
| |
| bx lr |
| |
| |
| /* Set up the platform, once the cpu has been initialized */ |
| .globl lowlevel_init |
| lowlevel_init: |
| |
| /* Remap */ |
| #ifdef CONFIG_SPL_BUILD |
| /* |
| * SPL : configure the remap (L3 NIC-301 GPV) |
| * so the on-chip RAM at lower memory instead ROM. |
| */ |
| ldr r0, =SOCFPGA_L3REGS_ADDRESS |
| mov r1, #0x19 |
| str r1, [r0] |
| #else |
| /* |
| * U-Boot : configure the remap (L3 NIC-301 GPV) |
| * so the SDRAM at lower memory instead on-chip RAM. |
| */ |
| ldr r0, =SOCFPGA_L3REGS_ADDRESS |
| mov r1, #0x2 |
| str r1, [r0] |
| |
| /* Private components security */ |
| |
| /* |
| * U-Boot : configure private timer, global timer and cpu |
| * component access as non secure for kernel stage (as required |
| * by kernel) |
| */ |
| mrc p15,4,r0,c15,c0,0 |
| add r1, r0, #0x54 |
| ldr r2, [r1] |
| orr r2, r2, #0xff |
| orr r2, r2, #0xf00 |
| str r2, [r1] |
| #endif /* #ifdef CONFIG_SPL_BUILD */ |
| mov pc, lr |
