MIPS: Loongson: Split common loongson source code out

To share common loongson source code between all of the loongson-based
machines. there is a need to split it out of the fuloong-2e/ directory.
at the same time, other according tuning is needed. the machine-specific
parts are defined as macros in relative header file, pci.h, mem.h,
machine.h.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

18 files changed, 266 insertions, 104 deletions

diff --git a/arch/mips/loongson/Kconfig b/arch/mips/loongson/Kconfig
new file mode 100644
index 0000000..376712a
--- /dev/null
+++ b/arch/mips/loongson/Kconfig
@@ -0,0 +1,31 @@
+choice
+    prompt "Machine Type"
+    depends on MACH_LOONGSON
+
+config LEMOTE_FULOONG2E
+    bool "Lemote Fuloong(2e) mini-PC"
+    select ARCH_SPARSEMEM_ENABLE
+    select CEVT_R4K
+    select CSRC_R4K
+    select SYS_HAS_CPU_LOONGSON2
+    select DMA_NONCOHERENT
+    select BOOT_ELF32
+    select BOARD_SCACHE
+    select HW_HAS_PCI
+    select I8259
+    select ISA
+    select IRQ_CPU
+    select SYS_SUPPORTS_32BIT_KERNEL
+    select SYS_SUPPORTS_64BIT_KERNEL
+    select SYS_SUPPORTS_LITTLE_ENDIAN
+    select SYS_SUPPORTS_HIGHMEM
+    select SYS_HAS_EARLY_PRINTK
+    select GENERIC_HARDIRQS_NO__DO_IRQ
+    select GENERIC_ISA_DMA_SUPPORT_BROKEN
+    select CPU_HAS_WB
+    help
+      Lemote Fuloong(2e) mini-PC board based on the Chinese Loongson-2E CPU and
+      an FPGA northbridge
+
+      Lemote Fuloong(2e) mini PC have a VIA686B south bridge.
+endchoice
diff --git a/arch/mips/loongson/Makefile b/arch/mips/loongson/Makefile
new file mode 100644
index 0000000..39048c4
--- /dev/null
+++ b/arch/mips/loongson/Makefile
@@ -0,0 +1,11 @@
+#
+# Common code for all Loongson based systems
+#
+
+obj-$(CONFIG_MACH_LOONGSON) += common/
+
+#
+# Lemote Fuloong mini-PC (Loongson 2E-based)
+#
+
+obj-$(CONFIG_LEMOTE_FULOONG2E)  += fuloong-2e/
diff --git a/arch/mips/loongson/common/Makefile b/arch/mips/loongson/common/Makefile
new file mode 100644
index 0000000..4e3889d
--- /dev/null
+++ b/arch/mips/loongson/common/Makefile
@@ -0,0 +1,11 @@
+#
+# Makefile for loongson based machines.
+#
+
+obj-y += setup.o init.o cmdline.o env.o time.o reset.o irq.o \
+    pci.o bonito-irq.o mem.o
+
+#
+# Early printk support
+#
+obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
diff --git a/arch/mips/loongson/fuloong-2e/bonito-irq.c b/arch/mips/loongson/common/bonito-irq.c
index 3e31e7a..3e31e7a 100644
--- a/arch/mips/loongson/fuloong-2e/bonito-irq.c
+++ b/arch/mips/loongson/common/bonito-irq.c
diff --git a/arch/mips/loongson/fuloong-2e/cmdline.c b/arch/mips/loongson/common/cmdline.c
index 75f1b24..75f1b24 100644
--- a/arch/mips/loongson/fuloong-2e/cmdline.c
+++ b/arch/mips/loongson/common/cmdline.c
diff --git a/arch/mips/loongson/fuloong-2e/early_printk.c b/arch/mips/loongson/common/early_printk.c
index 3e0a6ea..bc73edc 100644
--- a/arch/mips/loongson/fuloong-2e/early_printk.c
+++ b/arch/mips/loongson/common/early_printk.c
@@ -12,8 +12,7 @@
 #include <linux/serial_reg.h>
 
 #include <loongson.h>
-
-#define UART_BASE (BONITO_PCIIO_BASE + 0x3f8)
+#include <machine.h>
 
 #define PORT(base, offset) (u8 *)(base + offset)
 
@@ -30,7 +29,7 @@ static inline void serial_out(phys_addr_t base, int offset, int value)
 void prom_putchar(char c)
 {
 	phys_addr_t uart_base =
-		(phys_addr_t) ioremap_nocache(UART_BASE, 8);
+		(phys_addr_t) ioremap_nocache(LOONGSON_UART_BASE, 8);
 
 	while ((serial_in(uart_base, UART_LSR) & UART_LSR_THRE) == 0)
 		;
diff --git a/arch/mips/loongson/fuloong-2e/env.c b/arch/mips/loongson/common/env.c
index b9ef503..b9ef503 100644
--- a/arch/mips/loongson/fuloong-2e/env.c
+++ b/arch/mips/loongson/common/env.c
diff --git a/arch/mips/loongson/fuloong-2e/init.c b/arch/mips/loongson/common/init.c
index 3abe927..3abe927 100644
--- a/arch/mips/loongson/fuloong-2e/init.c
+++ b/arch/mips/loongson/common/init.c
diff --git a/arch/mips/loongson/common/irq.c b/arch/mips/loongson/common/irq.c
new file mode 100644
index 0000000..f368c73
--- /dev/null
+++ b/arch/mips/loongson/common/irq.c
@@ -0,0 +1,74 @@
+/*
+ * 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 <loongson.h>
+/*
+ * the first level int-handler will jump here if it is a bonito irq
+ */
+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);
+	}
+}
+
+asmlinkage void plat_irq_dispatch(void)
+{
+	unsigned int pending;
+
+	pending = read_c0_cause() & read_c0_status() & ST0_IM;
+
+	/* machine-specific plat_irq_dispatch */
+	mach_irq_dispatch(pending);
+}
+
+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();
+
+	/* setting irq trigger mode */
+	set_irq_trigger_mode();
+
+	/* no steer */
+	BONITO_INTSTEER = 0;
+
+	/*
+	 * Mask out all interrupt by writing "1" to all bit position in
+	 * the interrupt reset reg.
+	 */
+	BONITO_INTENCLR = ~0;
+
+	/* machine specific irq init */
+	mach_init_irq();
+}
diff --git a/arch/mips/loongson/fuloong-2e/machtype.c b/arch/mips/loongson/common/machtype.c
index e03aa0d..845b3fb 100644
--- a/arch/mips/loongson/fuloong-2e/machtype.c
+++ b/arch/mips/loongson/common/machtype.c
@@ -8,8 +8,10 @@
  * option) any later version.
  */
 
+#include <machine.h>
+
 const char *get_system_type(void)
 {
-	return "lemote-fuloong-2e-box";
+	return LOONGSON_MACHNAME;
 }
 
diff --git a/arch/mips/loongson/fuloong-2e/mem.c b/arch/mips/loongson/common/mem.c
index 6a7feb1..7c92f79 100644
--- a/arch/mips/loongson/fuloong-2e/mem.c
+++ b/arch/mips/loongson/common/mem.c
@@ -11,13 +11,15 @@
 #include <asm/bootinfo.h>
 
 #include <loongson.h>
+#include <mem.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);
+	add_memory_region(LOONGSON_HIGHMEM_START,
+		highmemsize << 20, BOOT_MEM_RAM);
 #endif /* CONFIG_64BIT */
 }
 
@@ -27,10 +29,7 @@ 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));
+		((addr >= LOONGSON_MMIO_MEM_START) &&
+		 (addr < LOONGSON_MMIO_MEM_END));
 }
diff --git a/arch/mips/loongson/fuloong-2e/pci.c b/arch/mips/loongson/common/pci.c
index 9812c30..a3a4abf 100644
--- a/arch/mips/loongson/fuloong-2e/pci.c
+++ b/arch/mips/loongson/common/pci.c
@@ -12,24 +12,24 @@
 #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,
+static struct resource loongson_pci_mem_resource = {
+	.name   = "pci memory space",
+	.start  = LOONGSON_PCI_MEM_START,
+	.end    = LOONGSON_PCI_MEM_END,
 	.flags  = IORESOURCE_MEM,
 };
 
-static struct resource loongson2e_pci_io_resource = {
-	.name   = "LOONGSON2E PCI IO MEM",
-	.start  = LOONGSON2E_PCI_IO_START,
+static struct resource loongson_pci_io_resource = {
+	.name   = "pci io space",
+	.start  = LOONGSON_PCI_IO_START,
 	.end    = IO_SPACE_LIMIT,
 	.flags  = IORESOURCE_IO,
 };
 
-static struct pci_controller  loongson2e_pci_controller = {
+static struct pci_controller  loongson_pci_controller = {
 	.pci_ops        = &bonito64_pci_ops,
-	.io_resource    = &loongson2e_pci_io_resource,
-	.mem_resource   = &loongson2e_pci_mem_resource,
+	.io_resource    = &loongson_pci_io_resource,
+	.mem_resource   = &loongson_pci_mem_resource,
 	.mem_offset     = 0x00000000UL,
 	.io_offset      = 0x00000000UL,
 };
@@ -73,9 +73,9 @@ static int __init pcibios_init(void)
 {
 	setup_pcimap();
 
-	loongson2e_pci_controller.io_map_base = mips_io_port_base;
+	loongson_pci_controller.io_map_base = mips_io_port_base;
 
-	register_pci_controller(&loongson2e_pci_controller);
+	register_pci_controller(&loongson_pci_controller);
 
 	return 0;
 }
diff --git a/arch/mips/loongson/common/reset.c b/arch/mips/loongson/common/reset.c
new file mode 100644
index 0000000..97e9182
--- /dev/null
+++ b/arch/mips/loongson/common/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 loongson_restart(char *command)
+{
+	/* do preparation for reboot */
+	mach_prepare_reboot();
+
+	/* reboot via jumping to boot base address */
+	((void (*)(void))ioremap_nocache(BONITO_BOOT_BASE, 4)) ();
+}
+
+static void loongson_halt(void)
+{
+	mach_prepare_shutdown();
+	while (1)
+		;
+}
+
+static int __init mips_reboot_setup(void)
+{
+	_machine_restart = loongson_restart;
+	_machine_halt = loongson_halt;
+	pm_power_off = loongson_halt;
+
+	return 0;
+}
+
+arch_initcall(mips_reboot_setup);
diff --git a/arch/mips/loongson/common/setup.c b/arch/mips/loongson/common/setup.c
new file mode 100644
index 0000000..4cd2aa9
--- /dev/null
+++ b/arch/mips/loongson/common/setup.c
@@ -0,0 +1,58 @@
+/*
+ * 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/module.h>
+
+#include <asm/wbflush.h>
+
+#include <loongson.h>
+
+#ifdef CONFIG_VT
+#include <linux/console.h>
+#include <linux/screen_info.h>
+#endif
+
+void (*__wbflush)(void);
+EXPORT_SYMBOL(__wbflush);
+
+static void wbflush_loongson(void)
+{
+	asm(".set\tpush\n\t"
+	    ".set\tnoreorder\n\t"
+	    ".set mips3\n\t"
+	    "sync\n\t"
+	    "nop\n\t"
+	    ".set\tpop\n\t"
+	    ".set mips0\n\t");
+}
+
+void __init plat_mem_setup(void)
+{
+	__wbflush = wbflush_loongson;
+
+#ifdef CONFIG_VT
+#if defined(CONFIG_VGA_CONSOLE)
+	conswitchp = &vga_con;
+
+	screen_info = (struct screen_info) {
+		0, 25,		/* orig-x, orig-y */
+		    0,		/* unused */
+		    0,		/* orig-video-page */
+		    0,		/* orig-video-mode */
+		    80,		/* orig-video-cols */
+		    0, 0, 0,	/* ega_ax, ega_bx, ega_cx */
+		    25,		/* orig-video-lines */
+		    VIDEO_TYPE_VGAC,	/* orig-video-isVGA */
+		    16		/* orig-video-points */
+	};
+#elif defined(CONFIG_DUMMY_CONSOLE)
+	conswitchp = &dummy_con;
+#endif
+#endif
+}
diff --git a/arch/mips/loongson/fuloong-2e/time.c b/arch/mips/loongson/common/time.c
index b13d171..b13d171 100644
--- a/arch/mips/loongson/fuloong-2e/time.c
+++ b/arch/mips/loongson/common/time.c
diff --git a/arch/mips/loongson/fuloong-2e/Makefile b/arch/mips/loongson/fuloong-2e/Makefile
index feb1d6b..96e45c1 100644
--- a/arch/mips/loongson/fuloong-2e/Makefile
+++ b/arch/mips/loongson/fuloong-2e/Makefile
@@ -2,12 +2,6 @@
 # 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
+obj-y += irq.o reset.o machtype.o
 
 EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/loongson/fuloong-2e/irq.c b/arch/mips/loongson/fuloong-2e/irq.c
index 9585f5a..7888cf6 100644
--- a/arch/mips/loongson/fuloong-2e/irq.c
+++ b/arch/mips/loongson/fuloong-2e/irq.c
@@ -7,39 +7,12 @@
  *  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)
 {
@@ -52,10 +25,8 @@ static void i8259_irqdispatch(void)
 		spurious_interrupt();
 }
 
-asmlinkage void plat_irq_dispatch(void)
+asmlinkage void mach_irq_dispatch(unsigned int pending)
 {
-	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 */
@@ -73,26 +44,15 @@ static struct irqaction cascade_irqaction = {
 	.name = "cascade",
 };
 
-void __init arch_init_irq(void)
+void __init set_irq_trigger_mode(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;
+	    BONITO_ICU_RETRYERR | BONITO_ICU_MBOXES;
+}
 
+void __init mach_init_irq(void)
+{
 	/* init all controller
 	 *   0-15         ------> i8259 interrupt
 	 *   16-23        ------> mips cpu interrupt
diff --git a/arch/mips/loongson/fuloong-2e/reset.c b/arch/mips/loongson/fuloong-2e/reset.c
index c21299a..677fe18 100644
--- a/arch/mips/loongson/fuloong-2e/reset.c
+++ b/arch/mips/loongson/fuloong-2e/reset.c
@@ -1,44 +1,23 @@
-/*
+/* Board-specific reboot/shutdown routines
+ * 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.
- *
- * 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)
+void mach_prepare_reboot(void)
 {
-	/* 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)
+void mach_prepare_shutdown(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);