[MIPS] TXx9: Cleanup restart/halt/power_off

Unify machine_restart/machine_halt/pm_power_off and add fallback
machine_halt routine.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

4 files changed, 34 insertions, 80 deletions

diff --git a/arch/mips/txx9/generic/setup.c b/arch/mips/txx9/generic/setup.c
index 4fbd7baa7037..82272e85a042 100644
--- a/arch/mips/txx9/generic/setup.c
+++ b/arch/mips/txx9/generic/setup.c
@@ -22,6 +22,7 @@
 #include <linux/gpio.h>
 #include <asm/bootinfo.h>
 #include <asm/time.h>
+#include <asm/reboot.h>
 #include <asm/txx9/generic.h>
 #include <asm/txx9/pci.h>
 #ifdef CONFIG_CPU_TX49XX
@@ -188,6 +189,25 @@ char * __init prom_getcmdline(void)
         return &(arcs_cmdline[0]);
 }
 
+static void __noreturn txx9_machine_halt(void)
+{
+        local_irq_disable();
+        clear_c0_status(ST0_IM);
+        while (1) {
+                if (cpu_wait) {
+                        (*cpu_wait)();
+                        if (cpu_has_counter) {
+                                /*
+                                 * Clear counter interrupt while it
+                                 * breaks WAIT instruction even if
+                                 * masked.
+                                 */
+                                write_c0_compare(0);
+                        }
+                }
+        }
+}
+
 /* wrappers */
 void __init plat_mem_setup(void)
 {
@@ -195,6 +215,12 @@ void __init plat_mem_setup(void)
         ioport_resource.end = ~0UL;     /* no limit */
         iomem_resource.start = 0;
         iomem_resource.end = ~0UL;      /* no limit */
+
+        /* fallback restart/halt routines */
+        _machine_restart = (void (*)(char *))txx9_machine_halt;
+        _machine_halt = txx9_machine_halt;
+        pm_power_off = txx9_machine_halt;
+
 #ifdef CONFIG_PCI
         pcibios_plat_setup = txx9_pcibios_setup;
 #endif
diff --git a/arch/mips/txx9/jmr3927/setup.c b/arch/mips/txx9/jmr3927/setup.c
index 7c16c402ff60..fa0503efc840 100644
--- a/arch/mips/txx9/jmr3927/setup.c
+++ b/arch/mips/txx9/jmr3927/setup.c
@@ -32,7 +32,6 @@
 #include <linux/types.h>
 #include <linux/ioport.h>
 #include <linux/delay.h>
-#include <linux/pm.h>
 #include <linux/platform_device.h>
 #include <linux/gpio.h>
 #ifdef CONFIG_SERIAL_TXX9
@@ -46,13 +45,12 @@
 #include <asm/txx9/jmr3927.h>
 #include <asm/mipsregs.h>
 
-extern void puts(const char *cp);
-
 /* don't enable - see errata */
 static int jmr3927_ccfg_toeon;
 
-static inline void do_reset(void)
+static void jmr3927_machine_restart(char *command)
 {
+        local_irq_disable();
 #if 1   /* Resetting PCI bus */
         jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
         jmr3927_ioc_reg_out(JMR3927_IOC_RESET_PCI, JMR3927_IOC_RESET_ADDR);
@@ -61,25 +59,8 @@ static inline void do_reset(void)
         jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
 #endif
         jmr3927_ioc_reg_out(JMR3927_IOC_RESET_CPU, JMR3927_IOC_RESET_ADDR);
-}
-
-static void jmr3927_machine_restart(char *command)
-{
-        local_irq_disable();
-        puts("Rebooting...");
-        do_reset();
-}
-
-static void jmr3927_machine_halt(void)
-{
-        puts("JMR-TX3927 halted.\n");
-        while (1);
-}
-
-static void jmr3927_machine_power_off(void)
-{
-        puts("JMR-TX3927 halted. Please turn off the power.\n");
-        while (1);
+        /* fallback */
+        (*_machine_halt)();
 }
 
 static void __init jmr3927_time_init(void)
@@ -102,8 +83,6 @@ static void __init jmr3927_mem_setup(void)
         set_io_port_base(JMR3927_PORT_BASE + JMR3927_PCIIO);
 
         _machine_restart = jmr3927_machine_restart;
-        _machine_halt = jmr3927_machine_halt;
-        pm_power_off = jmr3927_machine_power_off;
 
         /* Reboot on panic */
         panic_timeout = 180;
diff --git a/arch/mips/txx9/rbtx4927/setup.c b/arch/mips/txx9/rbtx4927/setup.c
index 65b72247d320..54c33c3e9f7d 100644
--- a/arch/mips/txx9/rbtx4927/setup.c
+++ b/arch/mips/txx9/rbtx4927/setup.c
@@ -47,11 +47,9 @@
 #include <linux/types.h>
 #include <linux/ioport.h>
 #include <linux/interrupt.h>
-#include <linux/pm.h>
 #include <linux/platform_device.h>
 #include <linux/delay.h>
 #include <asm/io.h>
-#include <asm/processor.h>
 #include <asm/reboot.h>
 #include <asm/txx9/generic.h>
 #include <asm/txx9/pci.h>
@@ -167,17 +165,8 @@ static void __init rbtx4937_arch_init(void)
 #define rbtx4937_arch_init NULL
 #endif /* CONFIG_PCI */
 
-static void __noreturn wait_forever(void)
-{
-        while (1)
-                if (cpu_wait)
-                        (*cpu_wait)();
-}
-
 static void toshiba_rbtx4927_restart(char *command)
 {
-        printk(KERN_NOTICE "System Rebooting...\n");
-
         /* enable the s/w reset register */
         writeb(1, rbtx4927_softresetlock_addr);
 
@@ -188,24 +177,8 @@ static void toshiba_rbtx4927_restart(char *command)
         /* do a s/w reset */
         writeb(1, rbtx4927_softreset_addr);
 
-        /* do something passive while waiting for reset */
-        local_irq_disable();
-        wait_forever();
-        /* no return */
-}
-
-static void toshiba_rbtx4927_halt(void)
-{
-        printk(KERN_NOTICE "System Halted\n");
-        local_irq_disable();
-        wait_forever();
-        /* no return */
-}
-
-static void toshiba_rbtx4927_power_off(void)
-{
-        toshiba_rbtx4927_halt();
-        /* no return */
+        /* fallback */
+        (*_machine_halt)();
 }
 
 static void __init rbtx4927_clock_init(void);
@@ -233,8 +206,6 @@ static void __init rbtx4927_mem_setup(void)
         }
 
         _machine_restart = toshiba_rbtx4927_restart;
-        _machine_halt = toshiba_rbtx4927_halt;
-        pm_power_off = toshiba_rbtx4927_power_off;
 
 #ifdef CONFIG_PCI
         txx9_alloc_pci_controller(&txx9_primary_pcic,
diff --git a/arch/mips/txx9/rbtx4938/setup.c b/arch/mips/txx9/rbtx4938/setup.c
index 4454b7901cd3..e1177b3b9103 100644
--- a/arch/mips/txx9/rbtx4938/setup.c
+++ b/arch/mips/txx9/rbtx4938/setup.c
@@ -15,7 +15,6 @@
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/console.h>
-#include <linux/pm.h>
 #include <linux/platform_device.h>
 #include <linux/gpio.h>
 
@@ -28,33 +27,14 @@
 #include <asm/txx9/spi.h>
 #include <asm/txx9pio.h>
 
-static void rbtx4938_machine_halt(void)
-{
-        printk(KERN_NOTICE "System Halted\n");
-        local_irq_disable();
-
-        while (1)
-                __asm__(".set\tmips3\n\t"
-                        "wait\n\t"
-                        ".set\tmips0");
-}
-
-static void rbtx4938_machine_power_off(void)
-{
-        rbtx4938_machine_halt();
-        /* no return */
-}
-
 static void rbtx4938_machine_restart(char *command)
 {
         local_irq_disable();
-
-        printk("Rebooting...");
         writeb(1, rbtx4938_softresetlock_addr);
         writeb(1, rbtx4938_sfvol_addr);
         writeb(1, rbtx4938_softreset_addr);
-        while(1)
-                ;
+        /* fallback */
+        (*_machine_halt)();
 }
 
 static void __init rbtx4938_pci_setup(void)
@@ -263,8 +243,6 @@ static void __init rbtx4938_mem_setup(void)
                 printk("request resource for fpga failed\n");
 
         _machine_restart = rbtx4938_machine_restart;
-        _machine_halt = rbtx4938_machine_halt;
-        pm_power_off = rbtx4938_machine_power_off;
 
         writeb(0xff, rbtx4938_led_addr);
         printk(KERN_INFO "RBTX4938 --- FPGA(Rev %02x) DIPSW:%02x,%02x\n",