2 * U-boot - cpu.c CPU specific functions
4 * Copyright (c) 2005 blackfin.uclinux.org
6 * (C) Copyright 2000-2004
7 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
9 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 #include <asm/blackfin.h>
31 #include <asm/entry.h>
38 extern unsigned int icplb_table[page_descriptor_table_size][2];
39 extern unsigned int dcplb_table[page_descriptor_table_size][2];
41 int do_reset(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
43 __asm__ __volatile__("cli r3;" "P0 = %0;" "JUMP (P0);"::"r"(L1_ISRAM)
49 /* These functions are just used to satisfy the linker */
55 int cleanup_before_linux(void)
60 void icache_enable(void)
62 unsigned int *I0, *I1;
65 /* Before enable icache, disable it first */
67 I0 = (unsigned int *)ICPLB_ADDR0;
68 I1 = (unsigned int *)ICPLB_DATA0;
70 /* make sure the locked ones go in first */
71 for (i = 0; i < page_descriptor_table_size; i++) {
72 if (CPLB_LOCK & icplb_table[i][1]) {
73 debug("adding %02i %02i 0x%08x 0x%08x\n", i, j,
74 icplb_table[i][0], icplb_table[i][1]);
75 *I0++ = icplb_table[i][0];
76 *I1++ = icplb_table[i][1];
81 for (i = 0; i < page_descriptor_table_size; i++) {
82 if (!(CPLB_LOCK & icplb_table[i][1])) {
83 debug("adding %02i %02i 0x%08x 0x%08x\n", i, j,
84 icplb_table[i][0], icplb_table[i][1]);
85 *I0++ = icplb_table[i][0];
86 *I1++ = icplb_table[i][1];
94 /* Fill the rest with invalid entry */
97 debug("filling %i with 0", j);
106 *(unsigned int *)IMEM_CONTROL = IMC | ENICPLB;
111 void icache_disable(void)
116 *(unsigned int *)IMEM_CONTROL &= ~(IMC | ENICPLB);
121 int icache_status(void)
124 value = *(unsigned int *)IMEM_CONTROL;
126 if (value & (IMC | ENICPLB))
132 void dcache_enable(void)
134 unsigned int *I0, *I1;
138 /* Before enable dcache, disable it first */
140 I0 = (unsigned int *)DCPLB_ADDR0;
141 I1 = (unsigned int *)DCPLB_DATA0;
143 /* make sure the locked ones go in first */
144 for (i = 0; i < page_descriptor_table_size; i++) {
145 if (CPLB_LOCK & dcplb_table[i][1]) {
146 debug("adding %02i %02i 0x%08x 0x%08x\n", i, j,
147 dcplb_table[i][0], dcplb_table[i][1]);
148 *I0++ = dcplb_table[i][0];
149 *I1++ = dcplb_table[i][1];
152 debug("skip %02i %02i 0x%08x 0x%08x\n", i, j,
153 dcplb_table[i][0], dcplb_table[i][1]);
157 for (i = 0; i < page_descriptor_table_size; i++) {
158 if (!(CPLB_LOCK & dcplb_table[i][1])) {
159 debug("adding %02i %02i 0x%08x 0x%08x\n", i, j,
160 dcplb_table[i][0], dcplb_table[i][1]);
161 *I0++ = dcplb_table[i][0];
162 *I1++ = dcplb_table[i][1];
170 /* Fill the rest with invalid entry */
172 for (; j < 16; j++) {
173 debug("filling %i with 0", j);
179 temp = *(unsigned int *)DMEM_CONTROL;
182 *(unsigned int *)DMEM_CONTROL =
183 ACACHE_BCACHE | ENDCPLB | PORT_PREF0 | temp;
188 void dcache_disable(void)
191 unsigned int *I0, *I1;
197 *(unsigned int *)DMEM_CONTROL &=
198 ~(ACACHE_BCACHE | ENDCPLB | PORT_PREF0);
202 /* after disable dcache, clear it so we don't confuse the next application */
203 I0 = (unsigned int *)DCPLB_ADDR0;
204 I1 = (unsigned int *)DCPLB_DATA0;
206 for (i = 0; i < 16; i++) {
212 int dcache_status(void)
215 value = *(unsigned int *)DMEM_CONTROL;
216 if (value & (ENDCPLB))