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-rw-r--r--arch/mips/cpu/xburst/cpu.c152
1 files changed, 152 insertions, 0 deletions
diff --git a/arch/mips/cpu/xburst/cpu.c b/arch/mips/cpu/xburst/cpu.c
new file mode 100644
index 0000000..cc190df
--- /dev/null
+++ b/arch/mips/cpu/xburst/cpu.c
@@ -0,0 +1,152 @@
+/*
+ * (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); */
+ writel(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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