2 * Copyright (C) 2011 Andes Technology Corporation
3 * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
4 * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
6 * See file CREDITS for list of people who contributed to this
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30 #include <asm/macro.h>
31 #include <generated/asm-offsets.h>
34 * parameters for the SDRAM controller
36 #define SDMC_TP1_A (CONFIG_FTSDMC021_BASE + FTSDMC021_TP1)
37 #define SDMC_TP2_A (CONFIG_FTSDMC021_BASE + FTSDMC021_TP2)
38 #define SDMC_CR1_A (CONFIG_FTSDMC021_BASE + FTSDMC021_CR1)
39 #define SDMC_CR2_A (CONFIG_FTSDMC021_BASE + FTSDMC021_CR2)
40 #define SDMC_B0_BSR_A (CONFIG_FTSDMC021_BASE + FTSDMC021_BANK0_BSR)
42 #define SDMC_TP1_D CONFIG_SYS_FTSDMC021_TP1
43 #define SDMC_TP2_D CONFIG_SYS_FTSDMC021_TP2
44 #define SDMC_CR1_D CONFIG_SYS_FTSDMC021_CR1
45 #define SDMC_CR2_D CONFIG_SYS_FTSDMC021_CR2
47 #define SDMC_B0_BSR_D CONFIG_SYS_FTSDMC021_BANK0_BSR
50 * parameters for the static memory controller
52 #define SMC_BANK0_CR_A (CONFIG_FTSMC020_BASE + FTSMC020_BANK0_CR)
53 #define SMC_BANK0_TPR_A (CONFIG_FTSMC020_BASE + FTSMC020_BANK0_TPR)
55 #define SMC_BANK0_CR_D FTSMC020_BANK0_LOWLV_CONFIG
56 #define SMC_BANK0_TPR_D FTSMC020_BANK0_LOWLV_TIMING
59 * parameters for the ahbc controller
61 #define AHBC_CR_A (CONFIG_FTAHBC020S_BASE + FTAHBC020S_CR)
62 #define AHBC_BSR6_A (CONFIG_FTAHBC020S_BASE + FTAHBC020S_SLAVE_BSR_6)
64 #define AHBC_BSR6_D CONFIG_SYS_FTAHBC020S_SLAVE_BSR_6
67 * parameters for the pmu controoler
69 #define PMU_PDLLCR0_A (CONFIG_FTPMU010_BASE + FTPMU010_PDLLCR0)
72 * numeric 7 segment display
75 write32 CONFIG_DEBUG_LED, \num
79 * Waiting for SDRAM to set up
82 li $r0, CONFIG_FTSDMC021_BASE
84 lwi $r1, [$r0+FTSDMC021_CR2]
88 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
107 * There are 2 bank connected to FTSMC020 on AG101
108 * BANK0: FLASH/ROM (SW5, J16), BANK1: OnBoard SDRAM.
109 * we need to set onboard SDRAM before remap and relocation.
112 write32 SMC_BANK0_CR_A, SMC_BANK0_CR_D ! 0x10000052
113 write32 SMC_BANK0_TPR_A, SMC_BANK0_TPR_D ! 0x00151151
116 * config AHB Controller
119 write32 AHBC_BSR6_A, AHBC_BSR6_D
122 * config PMU controller
124 /* ftpmu010_dlldis_disable, must do it in lowleve_init */
126 setbf32 PMU_PDLLCR0_A, FTPMU010_PDLLCR0_DLLDIS ! 0x00010000
129 * config SDRAM controller
132 write32 SDMC_TP1_A, SDMC_TP1_D ! 0x00011312
134 write32 SDMC_TP2_A, SDMC_TP2_D ! 0x00480180
136 write32 SDMC_CR1_A, SDMC_CR1_D ! 0x00002326
139 write32 SDMC_CR2_A, FTSDMC021_CR2_IPREC ! 0x00000010
143 write32 SDMC_CR2_A, FTSDMC021_CR2_ISMR ! 0x00000004
147 write32 SDMC_CR2_A, FTSDMC021_CR2_IREF ! 0x00000008
156 #ifdef __NDS32_N1213_43U1H__ /* NDS32 V0 ISA - AG101 Only */
163 #endif /* __NDS32_N1213_43U1H__ */
169 write32 SDMC_B0_BSR_A, SDMC_B0_BSR_D ! 0x00001100
171 /* clear empty BSR registers */
173 li $r4, CONFIG_FTSDMC021_BASE
175 swi $r5, [$r4 + FTSDMC021_BANK1_BSR]
176 swi $r5, [$r4 + FTSDMC021_BANK2_BSR]
177 swi $r5, [$r4 + FTSDMC021_BANK3_BSR]
179 #ifdef CONFIG_MEM_REMAP
181 * Copy ROM code to SDRAM base for memory remap layout.
182 * This is not the real relocation, the real relocation is the function
183 * relocate_code() is start.S which supports the systems is memory
187 * Doing memory remap is essential for preparing some non-OS or RTOS
190 * This is also a must on ADP-AG101 board.
191 * The reason is because the ROM/FLASH circuit on PCB board.
192 * AG101-A0 board has 2 jumpers MA17 and SW5 to configure which
193 * ROM/FLASH is used to boot.
195 * When SW5 = "0101", MA17 = LO, the ROM is connected to BANK0,
196 * and the FLASH is connected to BANK1.
197 * When SW5 = "1010", MA17 = HI, the ROM is disabled (still at BANK0),
198 * and the FLASH is connected to BANK0.
199 * It will occur problem when doing flash probing if the flash is at
200 * BANK0 (0x00000000) while memory remapping was skipped.
202 * Other board like ADP-AG101P may not enable this since there is only
203 * a FLASH connected to bank0.
206 li $r4, PHYS_SDRAM_0_AT_INIT /* 0x10000000 */
208 la $r1, relo_base /* get $pc or $lp */
210 sethi $r6, hi20(_end)
211 ori $r6, $r6, lo12(_end)
220 * MEM remap bit is operational
221 * - use it to map writeable memory at 0x00000000, in place of flash
222 * - before remap: flash/rom 0x00000000, sdram: 0x10000000-0x4fffffff
223 * - after remap: flash/rom 0x80000000, sdram: 0x00000000
226 setbf15 AHBC_CR_A, FTAHBC020S_CR_REMAP ! 0x1
228 #endif /* #ifdef CONFIG_MEM_REMAP */
235 li $r8, (CONFIG_DEBUG_LED)
238 #endif /* #ifndef CONFIG_SKIP_LOWLEVEL_INIT */