source: SVN/rincon/u-boot/cpu/mips/cpu.c @ 55

Last change on this file since 55 was 55, checked in by Tim Harvey, 2 years ago

rincon: added latest u-boot source

restored form server backup

Signed-off-by: Tim Harvey <tharvey@…>

File size: 2.0 KB
Line 
1/*
2 * (C) Copyright 2003
3 * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24#include <common.h>
25#include <command.h>
26#include <asm/mipsregs.h>
27#include <asm/cacheops.h>
28#include <asm/reboot.h>
29
30#define cache_op(op,addr)                                               \
31        __asm__ __volatile__(                                           \
32        "       .set    push                                    \n"     \
33        "       .set    noreorder                               \n"     \
34        "       .set    mips3\n\t                               \n"     \
35        "       cache   %0, %1                                  \n"     \
36        "       .set    pop                                     \n"     \
37        :                                                               \
38        : "i" (op), "R" (*(unsigned char *)(addr)))
39
40void __attribute__((weak)) _machine_restart(void)
41{
42}
43
44int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
45{
46        _machine_restart();
47
48        fprintf(stderr, "*** reset failed ***\n");
49        return 0;
50}
51
52void flush_cache(ulong start_addr, ulong size)
53{
54        unsigned long lsize = CFG_CACHELINE_SIZE;
55        unsigned long addr = start_addr & ~(lsize - 1);
56        unsigned long aend = (start_addr + size - 1) & ~(lsize - 1);
57
58        while (1) {
59                cache_op(Hit_Writeback_Inv_D, addr);
60                cache_op(Hit_Invalidate_I, addr);
61                if (addr == aend)
62                        break;
63                addr += lsize;
64        }
65}
66
67void write_one_tlb(int index, u32 pagemask, u32 hi, u32 low0, u32 low1)
68{
69        write_c0_entrylo0(low0);
70        write_c0_pagemask(pagemask);
71        write_c0_entrylo1(low1);
72        write_c0_entryhi(hi);
73        write_c0_index(index);
74        tlb_write_indexed();
75}
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