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/*
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
* (C) Copyright 2011
* Xiangfu Liu <xiangfu@openmobilefree.net>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <command.h>
#include <netdev.h>
#include <asm/mipsregs.h>
#include <asm/cacheops.h>
#include <asm/reboot.h>
#include <asm/io.h>
#include <asm/jz4740.h>
#define cache_op(op, addr) \
__asm__ __volatile__( \
".set push\n" \
".set noreorder\n" \
".set mips3\n" \
"cache %0, %1\n" \
".set pop\n" \
: \
: "i" (op), "R" (*(unsigned char *)(addr)))
void __attribute__((weak)) _machine_restart(void)
{
struct jz4740_wdt *wdt = (struct jz4740_wdt *)JZ4740_WDT_BASE;
struct jz4740_tcu *tcu = (struct jz4740_tcu *)JZ4740_TCU_BASE;
u16 tmp;
/* wdt_select_extalclk() */
tmp = readw(&wdt->tcsr);
tmp &= ~(WDT_TCSR_EXT_EN | WDT_TCSR_RTC_EN | WDT_TCSR_PCK_EN);
tmp |= WDT_TCSR_EXT_EN;
writew(tmp, &wdt->tcsr);
/* wdt_select_clk_div64() */
tmp = readw(&wdt->tcsr);
tmp &= ~WDT_TCSR_PRESCALE_MASK;
tmp |= WDT_TCSR_PRESCALE64,
writew(tmp, &wdt->tcsr);
writew(100, &wdt->tdr); /* wdt_set_data(100) */
writew(0, &wdt->tcnt); /* wdt_set_count(0); */
writew(TCU_TSSR_WDTSC, &tcu->tscr); /* tcu_start_wdt_clock */
writeb(readb(&wdt->tcer) | WDT_TCER_TCEN, &wdt->tcer); /* wdt start */
while (1)
;
}
int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
_machine_restart();
fprintf(stderr, "*** reset failed ***\n");
return 0;
}
void flush_cache(ulong start_addr, ulong size)
{
unsigned long lsize = CONFIG_SYS_CACHELINE_SIZE;
unsigned long addr = start_addr & ~(lsize - 1);
unsigned long aend = (start_addr + size - 1) & ~(lsize - 1);
for (; addr <= aend; addr += lsize) {
cache_op(Hit_Writeback_Inv_D, addr);
cache_op(Hit_Invalidate_I, addr);
}
}
void flush_dcache_range(ulong start_addr, ulong stop)
{
unsigned long lsize = CONFIG_SYS_CACHELINE_SIZE;
unsigned long addr = start_addr & ~(lsize - 1);
unsigned long aend = (stop - 1) & ~(lsize - 1);
for (; addr <= aend; addr += lsize)
cache_op(Hit_Writeback_Inv_D, addr);
}
void invalidate_dcache_range(ulong start_addr, ulong stop)
{
unsigned long lsize = CONFIG_SYS_CACHELINE_SIZE;
unsigned long addr = start_addr & ~(lsize - 1);
unsigned long aend = (stop - 1) & ~(lsize - 1);
for (; addr <= aend; addr += lsize)
cache_op(Hit_Invalidate_D, addr);
}
void flush_icache_all(void)
{
u32 addr, t = 0;
__asm__ __volatile__("mtc0 $0, $28"); /* Clear Taglo */
__asm__ __volatile__("mtc0 $0, $29"); /* Clear TagHi */
for (addr = CKSEG0; addr < CKSEG0 + CONFIG_SYS_ICACHE_SIZE;
addr += CONFIG_SYS_CACHELINE_SIZE) {
cache_op(Index_Store_Tag_I, addr);
}
/* invalidate btb */
__asm__ __volatile__(
".set mips32\n\t"
"mfc0 %0, $16, 7\n\t"
"nop\n\t"
"ori %0,2\n\t"
"mtc0 %0, $16, 7\n\t"
".set mips2\n\t"
:
: "r" (t));
}
void flush_dcache_all(void)
{
u32 addr;
for (addr = CKSEG0; addr < CKSEG0 + CONFIG_SYS_DCACHE_SIZE;
addr += CONFIG_SYS_CACHELINE_SIZE) {
cache_op(Index_Writeback_Inv_D, addr);
}
__asm__ __volatile__("sync");
}
void flush_cache_all(void)
{
flush_dcache_all();
flush_icache_all();
}
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