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authorWu Zhangjin <wuzhangjin@gmail.com>2009-07-02 23:26:08 +0800
committerRalf Baechle <ralf@linux-mips.org>2009-09-17 20:07:47 +0200
commit8e4971175acc910eb4258df82a6bd8f2c4e4e5b5 (patch)
tree921d53308d0a8a8e9119ec6b262a01fe0ccd1fd5 /arch/mips/loongson
parent67b35e5d01aba7a83f2161b0c90acb08afa01e3e (diff)
MIPS: Loongson: Change naming methods
To make source code of loongson sharable to the machines(such as gdium) made by the other companies, we rename arch/mips/lemote to arch/mips/loongson, asm/mach-lemote to asm/mach-loongson, and rename lm2e to the name of the machine: fuloong-2e. accordingly, FULONG are renamed to FULOONG2E to make it distinguishable to the future FULOONG2F. and also, some other relative tuning is needed. Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/loongson')
-rw-r--r--arch/mips/loongson/fuloong-2e/Makefile13
-rw-r--r--arch/mips/loongson/fuloong-2e/bonito-irq.c51
-rw-r--r--arch/mips/loongson/fuloong-2e/cmdline.c52
-rw-r--r--arch/mips/loongson/fuloong-2e/early_printk.c39
-rw-r--r--arch/mips/loongson/fuloong-2e/env.c58
-rw-r--r--arch/mips/loongson/fuloong-2e/init.c30
-rw-r--r--arch/mips/loongson/fuloong-2e/irq.c111
-rw-r--r--arch/mips/loongson/fuloong-2e/machtype.c15
-rw-r--r--arch/mips/loongson/fuloong-2e/mem.c36
-rw-r--r--arch/mips/loongson/fuloong-2e/pci.c83
-rw-r--r--arch/mips/loongson/fuloong-2e/reset.c44
-rw-r--r--arch/mips/loongson/fuloong-2e/time.c27
12 files changed, 559 insertions, 0 deletions
diff --git a/arch/mips/loongson/fuloong-2e/Makefile b/arch/mips/loongson/fuloong-2e/Makefile
new file mode 100644
index 000000000000..feb1d6bba499
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/Makefile
@@ -0,0 +1,13 @@
+#
+# Makefile for Lemote Fuloong2e mini-PC board.
+#
+
+obj-y += setup.o init.o reset.o irq.o pci.o bonito-irq.o mem.o \
+ env.o cmdline.o time.o machtype.o
+
+#
+# Early printk support
+#
+obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
+
+EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/loongson/fuloong-2e/bonito-irq.c b/arch/mips/loongson/fuloong-2e/bonito-irq.c
new file mode 100644
index 000000000000..3e31e7ad713e
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/bonito-irq.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
+ * Copyright (C) 2000, 2001 Ralf Baechle (ralf@gnu.org)
+ *
+ * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ * 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.
+ */
+#include <linux/interrupt.h>
+
+#include <loongson.h>
+
+static inline void bonito_irq_enable(unsigned int irq)
+{
+ BONITO_INTENSET = (1 << (irq - BONITO_IRQ_BASE));
+ mmiowb();
+}
+
+static inline void bonito_irq_disable(unsigned int irq)
+{
+ BONITO_INTENCLR = (1 << (irq - BONITO_IRQ_BASE));
+ mmiowb();
+}
+
+static struct irq_chip bonito_irq_type = {
+ .name = "bonito_irq",
+ .ack = bonito_irq_disable,
+ .mask = bonito_irq_disable,
+ .mask_ack = bonito_irq_disable,
+ .unmask = bonito_irq_enable,
+};
+
+static struct irqaction dma_timeout_irqaction = {
+ .handler = no_action,
+ .name = "dma_timeout",
+};
+
+void bonito_irq_init(void)
+{
+ u32 i;
+
+ for (i = BONITO_IRQ_BASE; i < BONITO_IRQ_BASE + 32; i++)
+ set_irq_chip_and_handler(i, &bonito_irq_type, handle_level_irq);
+
+ setup_irq(BONITO_IRQ_BASE + 10, &dma_timeout_irqaction);
+}
diff --git a/arch/mips/loongson/fuloong-2e/cmdline.c b/arch/mips/loongson/fuloong-2e/cmdline.c
new file mode 100644
index 000000000000..75f1b243ee4e
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/cmdline.c
@@ -0,0 +1,52 @@
+/*
+ * Based on Ocelot Linux port, which is
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * Copyright 2003 ICT CAS
+ * Author: Michael Guo <guoyi@ict.ac.cn>
+ *
+ * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ * Author: Wu Zhangjin, wuzj@lemote.com
+ *
+ * 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.
+ */
+#include <asm/bootinfo.h>
+
+#include <loongson.h>
+
+int prom_argc;
+/* pmon passes arguments in 32bit pointers */
+int *_prom_argv;
+
+void __init prom_init_cmdline(void)
+{
+ int i;
+ long l;
+
+ /* firmware arguments are initialized in head.S */
+ prom_argc = fw_arg0;
+ _prom_argv = (int *)fw_arg1;
+
+ /* arg[0] is "g", the rest is boot parameters */
+ arcs_cmdline[0] = '\0';
+ for (i = 1; i < prom_argc; i++) {
+ l = (long)_prom_argv[i];
+ if (strlen(arcs_cmdline) + strlen(((char *)l) + 1)
+ >= sizeof(arcs_cmdline))
+ break;
+ strcat(arcs_cmdline, ((char *)l));
+ strcat(arcs_cmdline, " ");
+ }
+
+ if ((strstr(arcs_cmdline, "console=")) == NULL)
+ strcat(arcs_cmdline, " console=ttyS0,115200");
+ if ((strstr(arcs_cmdline, "root=")) == NULL)
+ strcat(arcs_cmdline, " root=/dev/hda1");
+}
diff --git a/arch/mips/loongson/fuloong-2e/early_printk.c b/arch/mips/loongson/fuloong-2e/early_printk.c
new file mode 100644
index 000000000000..3e0a6eaa4041
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/early_printk.c
@@ -0,0 +1,39 @@
+/* early printk support
+ *
+ * Copyright (c) 2009 Philippe Vachon <philippe@cowpig.ca>
+ * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ * Author: Wu Zhangjin, wuzj@lemote.com
+ *
+ * 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.
+ */
+#include <linux/serial_reg.h>
+
+#include <loongson.h>
+
+#define UART_BASE (BONITO_PCIIO_BASE + 0x3f8)
+
+#define PORT(base, offset) (u8 *)(base + offset)
+
+static inline unsigned int serial_in(phys_addr_t base, int offset)
+{
+ return readb(PORT(base, offset));
+}
+
+static inline void serial_out(phys_addr_t base, int offset, int value)
+{
+ writeb(value, PORT(base, offset));
+}
+
+void prom_putchar(char c)
+{
+ phys_addr_t uart_base =
+ (phys_addr_t) ioremap_nocache(UART_BASE, 8);
+
+ while ((serial_in(uart_base, UART_LSR) & UART_LSR_THRE) == 0)
+ ;
+
+ serial_out(uart_base, UART_TX, c);
+}
diff --git a/arch/mips/loongson/fuloong-2e/env.c b/arch/mips/loongson/fuloong-2e/env.c
new file mode 100644
index 000000000000..b9ef50385541
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/env.c
@@ -0,0 +1,58 @@
+/*
+ * Based on Ocelot Linux port, which is
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * Copyright 2003 ICT CAS
+ * Author: Michael Guo <guoyi@ict.ac.cn>
+ *
+ * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ * Author: Wu Zhangjin, wuzj@lemote.com
+ *
+ * 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.
+ */
+#include <asm/bootinfo.h>
+
+#include <loongson.h>
+
+unsigned long bus_clock, cpu_clock_freq;
+unsigned long memsize, highmemsize;
+
+/* pmon passes arguments in 32bit pointers */
+int *_prom_envp;
+
+#define parse_even_earlier(res, option, p) \
+do { \
+ if (strncmp(option, (char *)p, strlen(option)) == 0) \
+ strict_strtol((char *)p + strlen(option"="), \
+ 10, &res); \
+} while (0)
+
+void __init prom_init_env(void)
+{
+ long l;
+
+ /* firmware arguments are initialized in head.S */
+ _prom_envp = (int *)fw_arg2;
+
+ l = (long)*_prom_envp;
+ while (l != 0) {
+ parse_even_earlier(bus_clock, "busclock", l);
+ parse_even_earlier(cpu_clock_freq, "cpuclock", l);
+ parse_even_earlier(memsize, "memsize", l);
+ parse_even_earlier(highmemsize, "highmemsize", l);
+ _prom_envp++;
+ l = (long)*_prom_envp;
+ }
+ if (memsize == 0)
+ memsize = 256;
+
+ pr_info("busclock=%ld, cpuclock=%ld, memsize=%ld, highmemsize=%ld\n",
+ bus_clock, cpu_clock_freq, memsize, highmemsize);
+}
diff --git a/arch/mips/loongson/fuloong-2e/init.c b/arch/mips/loongson/fuloong-2e/init.c
new file mode 100644
index 000000000000..3abe927422a3
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/init.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ * Author: Wu Zhangjin, wuzj@lemote.com
+ *
+ * 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.
+ */
+
+#include <linux/bootmem.h>
+
+#include <asm/bootinfo.h>
+
+#include <loongson.h>
+
+void __init prom_init(void)
+{
+ /* init base address of io space */
+ set_io_port_base((unsigned long)
+ ioremap(BONITO_PCIIO_BASE, BONITO_PCIIO_SIZE));
+
+ prom_init_cmdline();
+ prom_init_env();
+ prom_init_memory();
+}
+
+void __init prom_free_prom_memory(void)
+{
+}
diff --git a/arch/mips/loongson/fuloong-2e/irq.c b/arch/mips/loongson/fuloong-2e/irq.c
new file mode 100644
index 000000000000..9585f5aa7cce
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/irq.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ * 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.
+ */
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+
+#include <asm/irq_cpu.h>
+#include <asm/i8259.h>
+
+#include <loongson.h>
+/*
+ * the first level int-handler will jump here if it is a bonito irq
+ */
+static void bonito_irqdispatch(void)
+{
+ u32 int_status;
+ int i;
+
+ /* workaround the IO dma problem: let cpu looping to allow DMA finish */
+ int_status = BONITO_INTISR;
+ if (int_status & (1 << 10)) {
+ while (int_status & (1 << 10)) {
+ udelay(1);
+ int_status = BONITO_INTISR;
+ }
+ }
+
+ /* Get pending sources, masked by current enables */
+ int_status = BONITO_INTISR & BONITO_INTEN;
+
+ if (int_status != 0) {
+ i = __ffs(int_status);
+ int_status &= ~(1 << i);
+ do_IRQ(BONITO_IRQ_BASE + i);
+ }
+}
+
+static void i8259_irqdispatch(void)
+{
+ int irq;
+
+ irq = i8259_irq();
+ if (irq >= 0)
+ do_IRQ(irq);
+ else
+ spurious_interrupt();
+}
+
+asmlinkage void plat_irq_dispatch(void)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
+
+ if (pending & CAUSEF_IP7)
+ do_IRQ(MIPS_CPU_IRQ_BASE + 7);
+ else if (pending & CAUSEF_IP6) /* perf counter loverflow */
+ do_IRQ(LOONGSON2_PERFCNT_IRQ);
+ else if (pending & CAUSEF_IP5)
+ i8259_irqdispatch();
+ else if (pending & CAUSEF_IP2)
+ bonito_irqdispatch();
+ else
+ spurious_interrupt();
+}
+
+static struct irqaction cascade_irqaction = {
+ .handler = no_action,
+ .name = "cascade",
+};
+
+void __init arch_init_irq(void)
+{
+ /*
+ * Clear all of the interrupts while we change the able around a bit.
+ * int-handler is not on bootstrap
+ */
+ clear_c0_status(ST0_IM | ST0_BEV);
+ local_irq_disable();
+
+ /* most bonito irq should be level triggered */
+ BONITO_INTEDGE = BONITO_ICU_SYSTEMERR | BONITO_ICU_MASTERERR |
+ BONITO_ICU_RETRYERR | BONITO_ICU_MBOXES;
+ BONITO_INTSTEER = 0;
+
+ /*
+ * Mask out all interrupt by writing "1" to all bit position in
+ * the interrupt reset reg.
+ */
+ BONITO_INTENCLR = ~0;
+
+ /* init all controller
+ * 0-15 ------> i8259 interrupt
+ * 16-23 ------> mips cpu interrupt
+ * 32-63 ------> bonito irq
+ */
+
+ /* Sets the first-level interrupt dispatcher. */
+ mips_cpu_irq_init();
+ init_i8259_irqs();
+ bonito_irq_init();
+
+ /* bonito irq at IP2 */
+ setup_irq(MIPS_CPU_IRQ_BASE + 2, &cascade_irqaction);
+ /* 8259 irq at IP5 */
+ setup_irq(MIPS_CPU_IRQ_BASE + 5, &cascade_irqaction);
+}
diff --git a/arch/mips/loongson/fuloong-2e/machtype.c b/arch/mips/loongson/fuloong-2e/machtype.c
new file mode 100644
index 000000000000..e03aa0de6176
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/machtype.c
@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ * Author: Wu Zhangjin, wuzj@lemote.com
+ *
+ * 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.
+ */
+
+const char *get_system_type(void)
+{
+ return "lemote-fuloong-2e-box";
+}
+
diff --git a/arch/mips/loongson/fuloong-2e/mem.c b/arch/mips/loongson/fuloong-2e/mem.c
new file mode 100644
index 000000000000..6a7feb178fa5
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/mem.c
@@ -0,0 +1,36 @@
+/*
+ * 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.
+ */
+#include <linux/fs.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+
+#include <asm/bootinfo.h>
+
+#include <loongson.h>
+
+void __init prom_init_memory(void)
+{
+ add_memory_region(0x0, (memsize << 20), BOOT_MEM_RAM);
+#ifdef CONFIG_64BIT
+ if (highmemsize > 0)
+ add_memory_region(0x20000000, highmemsize << 20, BOOT_MEM_RAM);
+#endif /* CONFIG_64BIT */
+}
+
+/* override of arch/mips/mm/cache.c: __uncached_access */
+int __uncached_access(struct file *file, unsigned long addr)
+{
+ if (file->f_flags & O_SYNC)
+ return 1;
+
+ /*
+ * On the Lemote Loongson 2e system, the peripheral registers
+ * reside between 0x1000:0000 and 0x2000:0000.
+ */
+ return addr >= __pa(high_memory) ||
+ ((addr >= 0x10000000) && (addr < 0x20000000));
+}
diff --git a/arch/mips/loongson/fuloong-2e/pci.c b/arch/mips/loongson/fuloong-2e/pci.c
new file mode 100644
index 000000000000..9812c30cc6eb
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/pci.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ * 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.
+ */
+#include <linux/pci.h>
+
+#include <pci.h>
+#include <loongson.h>
+
+static struct resource loongson2e_pci_mem_resource = {
+ .name = "LOONGSON2E PCI MEM",
+ .start = LOONGSON2E_PCI_MEM_START,
+ .end = LOONGSON2E_PCI_MEM_END,
+ .flags = IORESOURCE_MEM,
+};
+
+static struct resource loongson2e_pci_io_resource = {
+ .name = "LOONGSON2E PCI IO MEM",
+ .start = LOONGSON2E_PCI_IO_START,
+ .end = IO_SPACE_LIMIT,
+ .flags = IORESOURCE_IO,
+};
+
+static struct pci_controller loongson2e_pci_controller = {
+ .pci_ops = &bonito64_pci_ops,
+ .io_resource = &loongson2e_pci_io_resource,
+ .mem_resource = &loongson2e_pci_mem_resource,
+ .mem_offset = 0x00000000UL,
+ .io_offset = 0x00000000UL,
+};
+
+static void __init setup_pcimap(void)
+{
+ /*
+ * local to PCI mapping for CPU accessing PCI space
+ * CPU address space [256M,448M] is window for accessing pci space
+ * we set pcimap_lo[0,1,2] to map it to pci space[0M,64M], [320M,448M]
+ *
+ * pcimap: PCI_MAP2 PCI_Mem_Lo2 PCI_Mem_Lo1 PCI_Mem_Lo0
+ * [<2G] [384M,448M] [320M,384M] [0M,64M]
+ */
+ BONITO_PCIMAP = BONITO_PCIMAP_PCIMAP_2 |
+ BONITO_PCIMAP_WIN(2, BONITO_PCILO2_BASE) |
+ BONITO_PCIMAP_WIN(1, BONITO_PCILO1_BASE) |
+ BONITO_PCIMAP_WIN(0, 0);
+
+ /*
+ * PCI-DMA to local mapping: [2G,2G+256M] -> [0M,256M]
+ */
+ BONITO_PCIBASE0 = 0x80000000ul; /* base: 2G -> mmap: 0M */
+ /* size: 256M, burst transmission, pre-fetch enable, 64bit */
+ LOONGSON_PCI_HIT0_SEL_L = 0xc000000cul;
+ LOONGSON_PCI_HIT0_SEL_H = 0xfffffffful;
+ LOONGSON_PCI_HIT1_SEL_L = 0x00000006ul; /* set this BAR as invalid */
+ LOONGSON_PCI_HIT1_SEL_H = 0x00000000ul;
+ LOONGSON_PCI_HIT2_SEL_L = 0x00000006ul; /* set this BAR as invalid */
+ LOONGSON_PCI_HIT2_SEL_H = 0x00000000ul;
+
+ /* avoid deadlock of PCI reading/writing lock operation */
+ LOONGSON_PCI_ISR4C = 0xd2000001ul;
+
+ /* can not change gnt to break pci transfer when device's gnt not
+ deassert for some broken device */
+ LOONGSON_PXARB_CFG = 0x00fe0105ul;
+}
+
+static int __init pcibios_init(void)
+{
+ setup_pcimap();
+
+ loongson2e_pci_controller.io_map_base = mips_io_port_base;
+
+ register_pci_controller(&loongson2e_pci_controller);
+
+ return 0;
+}
+
+arch_initcall(pcibios_init);
diff --git a/arch/mips/loongson/fuloong-2e/reset.c b/arch/mips/loongson/fuloong-2e/reset.c
new file mode 100644
index 000000000000..c21299af7f64
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/reset.c
@@ -0,0 +1,44 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ * Copyright (C) 2009 Lemote, Inc. & Institute of Computing Technology
+ * Author: Zhangjin Wu, wuzj@lemote.com
+ */
+#include <linux/init.h>
+#include <linux/pm.h>
+
+#include <asm/reboot.h>
+
+#include <loongson.h>
+
+static void loongson2e_restart(char *command)
+{
+ /* do preparation for reboot */
+ BONITO_BONGENCFG &= ~(1 << 2);
+ BONITO_BONGENCFG |= (1 << 2);
+
+ /* reboot via jumping to boot base address */
+ ((void (*)(void))ioremap_nocache(BONITO_BOOT_BASE, 4)) ();
+}
+
+static void loongson2e_halt(void)
+{
+ while (1)
+ ;
+}
+
+static int __init mips_reboot_setup(void)
+{
+ _machine_restart = loongson2e_restart;
+ _machine_halt = loongson2e_halt;
+ pm_power_off = loongson2e_halt;
+
+ return 0;
+}
+
+arch_initcall(mips_reboot_setup);
diff --git a/arch/mips/loongson/fuloong-2e/time.c b/arch/mips/loongson/fuloong-2e/time.c
new file mode 100644
index 000000000000..b13d17174654
--- /dev/null
+++ b/arch/mips/loongson/fuloong-2e/time.c
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ * Author: Wu Zhangjin, wuzj@lemote.com
+ *
+ * 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.
+ */
+#include <asm/mc146818-time.h>
+#include <asm/time.h>
+
+#include <loongson.h>
+
+void __init plat_time_init(void)
+{
+ /* setup mips r4k timer */
+ mips_hpt_frequency = cpu_clock_freq / 2;
+}
+
+unsigned long read_persistent_clock(void)
+{
+ return mc146818_get_cmos_time();
+}