to make u-boot work for fat32 filesystem
[jz_uboot.git] / board / pm856 / init.S
blobade5d6e5b61b1919475efd66b06a2bdd8ebf611f
1 /*
2  * Copyright 2004 Freescale Semiconductor.
3  * Copyright (C) 2002,2003, Motorola Inc.
4  * Xianghua Xiao <X.Xiao@motorola.com>
5  *
6  * See file CREDITS for list of people who contributed to this
7  * project.
8  *
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.
13  *
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.
18  *
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,
22  * MA 02111-1307 USA
23  */
25 #include <ppc_asm.tmpl>
26 #include <ppc_defs.h>
27 #include <asm/cache.h>
28 #include <asm/mmu.h>
29 #include <config.h>
30 #include <mpc85xx.h>
34  * TLB0 and TLB1 Entries
35  *
36  * Out of reset, TLB1's Entry 0 maps the highest 4K for CCSRBAR.
37  * However, CCSRBAR is then relocated to CFG_CCSRBAR right after
38  * these TLB entries are established.
39  *
40  * The TLB entries for DDR are dynamically setup in spd_sdram()
41  * and use TLB1 Entries 8 through 15 as needed according to the
42  * size of DDR memory.
43  *
44  * MAS0: tlbsel, esel, nv
45  * MAS1: valid, iprot, tid, ts, tsize
46  * MAS2: epn, sharen, x0, x1, w, i, m, g, e
47  * MAS3: rpn, u0-u3, ux, sx, uw, sw, ur, sr
48  */
50 #define entry_start \
51         mflr    r1      ;       \
52         bl      0f      ;
54 #define entry_end \
55 0:      mflr    r0      ;       \
56         mtlr    r1      ;       \
57         blr             ;
60         .section        .bootpg, "ax"
61         .globl  tlb1_entry
62 tlb1_entry:
63         entry_start
65         /*
66          * Number of TLB0 and TLB1 entries in the following table
67          */
68         .long 13
70 #if (CFG_CCSRBAR_DEFAULT != CFG_CCSRBAR)
71         /*
72          * TLB0         4K      Non-cacheable, guarded
73          * 0xff700000   4K      Initial CCSRBAR mapping
74          *
75          * This ends up at a TLB0 Index==0 entry, and must not collide
76          * with other TLB0 Entries.
77          */
78         .long TLB1_MAS0(0, 0, 0)
79         .long TLB1_MAS1(1, 0, 0, 0, 0)
80         .long TLB1_MAS2(E500_TLB_EPN(CFG_CCSRBAR_DEFAULT), 0,0,0,0,1,0,1,0)
81         .long TLB1_MAS3(E500_TLB_RPN(CFG_CCSRBAR_DEFAULT), 0,0,0,0,0,1,0,1,0,1)
82 #else
83 #error("Update the number of table entries in tlb1_entry")
84 #endif
86         /*
87          * TLB0         16K     Cacheable, non-guarded
88          * 0xd001_0000  16K     Temporary Global data for initialization
89          *
90          * Use four 4K TLB0 entries.  These entries must be cacheable
91          * as they provide the bootstrap memory before the memory
92          * controler and real memory have been configured.
93          *
94          * These entries end up at TLB0 Indicies 0x10, 0x14, 0x18 and 0x1c,
95          * and must not collide with other TLB0 entries.
96          */
97         .long TLB1_MAS0(0, 0, 0)
98         .long TLB1_MAS1(1, 0, 0, 0, 0)
99         .long TLB1_MAS2(E500_TLB_EPN(CFG_INIT_RAM_ADDR),
100                         0,0,0,0,0,0,0,0)
101         .long TLB1_MAS3(E500_TLB_RPN(CFG_INIT_RAM_ADDR),
102                         0,0,0,0,0,1,0,1,0,1)
104         .long TLB1_MAS0(0, 0, 0)
105         .long TLB1_MAS1(1, 0, 0, 0, 0)
106         .long TLB1_MAS2(E500_TLB_EPN(CFG_INIT_RAM_ADDR + 4 * 1024),
107                         0,0,0,0,0,0,0,0)
108         .long TLB1_MAS3(E500_TLB_RPN(CFG_INIT_RAM_ADDR + 4 * 1024),
109                         0,0,0,0,0,1,0,1,0,1)
111         .long TLB1_MAS0(0, 0, 0)
112         .long TLB1_MAS1(1, 0, 0, 0, 0)
113         .long TLB1_MAS2(E500_TLB_EPN(CFG_INIT_RAM_ADDR + 8 * 1024),
114                         0,0,0,0,0,0,0,0)
115         .long TLB1_MAS3(E500_TLB_RPN(CFG_INIT_RAM_ADDR + 8 * 1024),
116                         0,0,0,0,0,1,0,1,0,1)
118         .long TLB1_MAS0(0, 0, 0)
119         .long TLB1_MAS1(1, 0, 0, 0, 0)
120         .long TLB1_MAS2(E500_TLB_EPN(CFG_INIT_RAM_ADDR + 12 * 1024),
121                         0,0,0,0,0,0,0,0)
122         .long TLB1_MAS3(E500_TLB_RPN(CFG_INIT_RAM_ADDR + 12 * 1024),
123                         0,0,0,0,0,1,0,1,0,1)
126         /*
127          * TLB 0:       64M     Non-cacheable, guarded
128          * 0xfc000000   64M     FLASH (8,16,32 or 64 MB)
129          * Out of reset this entry is only 4K.
130          */
131         .long TLB1_MAS0(1, 0, 0)
132         .long TLB1_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_64M)
133         .long TLB1_MAS2(E500_TLB_EPN(0xfc000000), 0,0,0,0,1,0,1,0)
134         .long TLB1_MAS3(E500_TLB_RPN(0xfc000000), 0,0,0,0,0,1,0,1,0,1)
136         /*
137          * TLB 1:       256M    Non-cacheable, guarded
138          * 0x80000000   256M    PCI1 MEM First half
139          */
140         .long TLB1_MAS0(1, 1, 0)
141         .long TLB1_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_256M)
142         .long TLB1_MAS2(E500_TLB_EPN(CFG_PCI1_MEM_BASE), 0,0,0,0,1,0,1,0)
143         .long TLB1_MAS3(E500_TLB_RPN(CFG_PCI1_MEM_BASE), 0,0,0,0,0,1,0,1,0,1)
145         /*
146          * TLB 2:       256M    Non-cacheable, guarded
147          * 0x90000000   256M    PCI1 MEM Second half
148          */
149         .long TLB1_MAS0(1, 2, 0)
150         .long TLB1_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_256M)
151         .long TLB1_MAS2(E500_TLB_EPN(CFG_PCI1_MEM_BASE + 0x10000000),
152                         0,0,0,0,1,0,1,0)
153         .long TLB1_MAS3(E500_TLB_RPN(CFG_PCI1_MEM_BASE + 0x10000000),
154                         0,0,0,0,0,1,0,1,0,1)
156         /*
157          * TLB 3:       256M    Non-cacheable, guarded
158          * 0xc0000000   256M    Rapid IO MEM First half
159          */
160         .long TLB1_MAS0(1, 3, 0)
161         .long TLB1_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_256M)
162         .long TLB1_MAS2(E500_TLB_EPN(CFG_RIO_MEM_BASE), 0,0,0,0,1,0,1,0)
163         .long TLB1_MAS3(E500_TLB_RPN(CFG_RIO_MEM_BASE), 0,0,0,0,0,1,0,1,0,1)
165         /*
166          * TLB 4:       256M    Non-cacheable, guarded
167          * 0xd0000000   256M    Rapid IO MEM Second half
168          */
169         .long TLB1_MAS0(1, 4, 0)
170         .long TLB1_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_256M)
171         .long TLB1_MAS2(E500_TLB_EPN(CFG_RIO_MEM_BASE + 0x10000000),
172                         0,0,0,0,1,0,1,0)
173         .long TLB1_MAS3(E500_TLB_RPN(CFG_RIO_MEM_BASE + 0x10000000),
174                         0,0,0,0,0,1,0,1,0,1)
176         /*
177          * TLB 5:       64M     Non-cacheable, guarded
178          * 0xe000_0000  1M      CCSRBAR
179          * 0xe200_0000  16M     PCI1 IO
180          */
181         .long TLB1_MAS0(1, 5, 0)
182         .long TLB1_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_64M)
183         .long TLB1_MAS2(E500_TLB_EPN(CFG_CCSRBAR), 0,0,0,0,1,0,1,0)
184         .long TLB1_MAS3(E500_TLB_RPN(CFG_CCSRBAR), 0,0,0,0,0,1,0,1,0,1)
186         /*
187          * TLB 6:       64M     Cacheable, non-guarded
188          * 0xf000_0000  64M     LBC SDRAM
189          */
190         .long TLB1_MAS0(1, 6, 0)
191         .long TLB1_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_64M)
192         .long TLB1_MAS2(E500_TLB_EPN(CFG_LBC_SDRAM_BASE), 0,0,0,0,0,0,0,0)
193         .long TLB1_MAS3(E500_TLB_RPN(CFG_LBC_SDRAM_BASE), 0,0,0,0,0,1,0,1,0,1)
195 #if !defined(CONFIG_SPD_EEPROM)
196         /*
197          * TLB 7:       256M    DDR
198          * 0x00000000   256M    DDR System memory
199          * Without SPD EEPROM configured DDR, this must be setup manually.
200          * Make sure the TLB count at the top of this table is correct.
201          * Likely it needs to be increased by two for these entries.
202          */
204         .long TLB1_MAS0(1, 7, 0)
205         .long TLB1_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_256M)
206         .long TLB1_MAS2(E500_TLB_EPN(CFG_DDR_SDRAM_BASE), 0,0,0,0,0,0,0,0)
207         .long TLB1_MAS3(E500_TLB_RPN(CFG_DDR_SDRAM_BASE), 0,0,0,0,0,1,0,1,0,1)
208 #endif
210         entry_end
213  * LAW(Local Access Window) configuration:
215  * 0x0000_0000     0x7fff_ffff     DDR                     2G
216  * 0x8000_0000     0x9fff_ffff     PCI1 MEM                512M
217  * 0xc000_0000     0xdfff_ffff     RapidIO                 512M
218  * 0xe000_0000     0xe000_ffff     CCSR                    1M
219  * 0xe200_0000     0xe2ff_ffff     PCI1 IO                 16M
220  * 0xf000_0000     0xf7ff_ffff     SDRAM                   128M
221  * 0xf800_0000     0xf80f_ffff     BCSR                    1M
222  * 0xfc00_0000     0xffff_ffff     FLASH (boot bank)       64M
224  * Notes:
225  *    CCSRBAR and L2-as-SRAM don't need a configured Local Access Window.
226  *    If flash is 8M at default position (last 8M), no LAW needed.
227  */
229 #if !defined(CONFIG_SPD_EEPROM)
230 #define LAWBAR0 ((CFG_DDR_SDRAM_BASE>>12) & 0xfffff)
231 #define LAWAR0  (LAWAR_EN | LAWAR_TRGT_IF_DDR | (LAWAR_SIZE & LAWAR_SIZE_256M))
232 #else
233 #define LAWBAR0 0
234 #define LAWAR0  ((LAWAR_TRGT_IF_DDR | (LAWAR_SIZE & LAWAR_SIZE_128M)) & ~LAWAR_EN)
235 #endif
237 #define LAWBAR1 ((CFG_PCI1_MEM_BASE>>12) & 0xfffff)
238 #define LAWAR1  (LAWAR_EN | LAWAR_TRGT_IF_PCIX | (LAWAR_SIZE & LAWAR_SIZE_512M))
241  * This is not so much the SDRAM map as it is the whole localbus map.
242  */
243 #define LAWBAR2 ((CFG_LBC_SDRAM_BASE>>12) & 0xfffff)
244 #define LAWAR2  (LAWAR_EN | LAWAR_TRGT_IF_LBC | (LAWAR_SIZE & LAWAR_SIZE_256M))
246 #define LAWBAR3 ((CFG_PCI1_IO_BASE>>12) & 0xfffff)
247 #define LAWAR3  (LAWAR_EN | LAWAR_TRGT_IF_PCIX | (LAWAR_SIZE & LAWAR_SIZE_16M))
250  * Rapid IO at 0xc000_0000 for 512 M
251  */
252 #define LAWBAR4 ((CFG_RIO_MEM_BASE>>12) & 0xfffff)
253 #define LAWAR4  (LAWAR_EN | LAWAR_TRGT_IF_RIO | (LAWAR_SIZE & LAWAR_SIZE_512M))
256         .section .bootpg, "ax"
257         .globl  law_entry
258 law_entry:
259         entry_start
260         .long 0x05
261         .long LAWBAR0,LAWAR0,LAWBAR1,LAWAR1,LAWBAR2,LAWAR2,LAWBAR3,LAWAR3
262         .long LAWBAR4,LAWAR4
263         entry_end