Merge branch 'mips-next-3.9' of git://git.linux-mips.org/pub/scm/john/linux-john into mips-for-linux-next

arch/mips/kernel/Makefile

@@ -27,6 +27,7 @@ obj-$(CONFIG_CSRC_IOASIC)	+= csrc-ioasic.o
 obj-$(CONFIG_CSRC_POWERTV)	+= csrc-powertv.o
 obj-$(CONFIG_CSRC_R4K)		+= csrc-r4k.o
 obj-$(CONFIG_CSRC_SB1250)	+= csrc-sb1250.o
+obj-$(CONFIG_CSRC_GIC)		+= csrc-gic.o
 obj-$(CONFIG_SYNC_R4K)		+= sync-r4k.o
 
 obj-$(CONFIG_STACKTRACE)	+= stacktrace.o
@@ -98,4 +99,35 @@ obj-$(CONFIG_HW_PERF_EVENTS)	+= perf_event_mipsxx.o
 
 obj-$(CONFIG_JUMP_LABEL)	+= jump_label.o
 
+#
+# DSP ASE supported for MIPS32 or MIPS64 Release 2 cores only. It is safe
+# to enable DSP assembler support here even if the MIPS Release 2 CPU we
+# are targetting does not support DSP because all code-paths making use of
+# it properly check that the running CPU *actually does* support these
+# instructions.
+#
+ifeq ($(CONFIG_CPU_MIPSR2), y)
+CFLAGS_DSP 			= -DHAVE_AS_DSP
+
+#
+# Check if assembler supports DSP ASE
+#
+ifeq ($(call cc-option-yn,-mdsp), y)
+CFLAGS_DSP			+= -mdsp
+endif
+
+#
+# Check if assembler supports DSP ASE Rev2
+#
+ifeq ($(call cc-option-yn,-mdspr2), y)
+CFLAGS_DSP			+= -mdspr2
+endif
+
+CFLAGS_signal.o			= $(CFLAGS_DSP)
+CFLAGS_signal32.o		= $(CFLAGS_DSP)
+CFLAGS_process.o		= $(CFLAGS_DSP)
+CFLAGS_branch.o			= $(CFLAGS_DSP)
+CFLAGS_ptrace.o			= $(CFLAGS_DSP)
+endif
+
 CPPFLAGS_vmlinux.lds		:= $(KBUILD_CFLAGS)

arch/mips/kernel/cpu-probe.c

@@ -201,6 +201,7 @@ void __init check_wait(void)
 		break;
 
 	case CPU_M14KC:
+	case CPU_M14KEC:
 	case CPU_24K:
 	case CPU_34K:
 	case CPU_1004K:
@@ -467,6 +468,10 @@ static inline unsigned int decode_config3(struct cpuinfo_mips *c)
 		c->ases |= MIPS_ASE_MIPSMT;
 	if (config3 & MIPS_CONF3_ULRI)
 		c->options |= MIPS_CPU_ULRI;
+	if (config3 & MIPS_CONF3_ISA)
+		c->options |= MIPS_CPU_MICROMIPS;
+	if (config3 & MIPS_CONF3_VZ)
+		c->ases |= MIPS_ASE_VZ;
 
 	return config3 & MIPS_CONF_M;
 }
@@ -866,10 +871,13 @@ static inline void cpu_probe_mips(struct cpuinfo_mips *c, unsigned int cpu)
 		__cpu_name[cpu] = "MIPS 20Kc";
 		break;
 	case PRID_IMP_24K:
-	case PRID_IMP_24KE:
 		c->cputype = CPU_24K;
 		__cpu_name[cpu] = "MIPS 24Kc";
 		break;
+	case PRID_IMP_24KE:
+		c->cputype = CPU_24K;
+		__cpu_name[cpu] = "MIPS 24KEc";
+		break;
 	case PRID_IMP_25KF:
 		c->cputype = CPU_25KF;
 		__cpu_name[cpu] = "MIPS 25Kc";
@@ -886,6 +894,10 @@ static inline void cpu_probe_mips(struct cpuinfo_mips *c, unsigned int cpu)
 		c->cputype = CPU_M14KC;
 		__cpu_name[cpu] = "MIPS M14Kc";
 		break;
+	case PRID_IMP_M14KEC:
+		c->cputype = CPU_M14KEC;
+		__cpu_name[cpu] = "MIPS M14KEc";
+		break;
 	case PRID_IMP_1004K:
 		c->cputype = CPU_1004K;
 		__cpu_name[cpu] = "MIPS 1004Kc";

arch/mips/kernel/csrc-gic.c

@@ -0,0 +1,49 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2012 MIPS Technologies, Inc.  All rights reserved.
+ */
+#include <linux/clocksource.h>
+#include <linux/init.h>
+
+#include <asm/time.h>
+#include <asm/gic.h>
+
+static cycle_t gic_hpt_read(struct clocksource *cs)
+{
+	unsigned int hi, hi2, lo;
+
+	do {
+		GICREAD(GIC_REG(SHARED, GIC_SH_COUNTER_63_32), hi);
+		GICREAD(GIC_REG(SHARED, GIC_SH_COUNTER_31_00), lo);
+		GICREAD(GIC_REG(SHARED, GIC_SH_COUNTER_63_32), hi2);
+	} while (hi2 != hi);
+
+	return (((cycle_t) hi) << 32) + lo;
+}
+
+static struct clocksource gic_clocksource = {
+	.name	= "GIC",
+	.read	= gic_hpt_read,
+	.flags	= CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+void __init gic_clocksource_init(unsigned int frequency)
+{
+	unsigned int config, bits;
+
+	/* Calculate the clocksource mask. */
+	GICREAD(GIC_REG(SHARED, GIC_SH_CONFIG), config);
+	bits = 32 + ((config & GIC_SH_CONFIG_COUNTBITS_MSK) >>
+		(GIC_SH_CONFIG_COUNTBITS_SHF - 2));
+
+	/* Set clocksource mask. */
+	gic_clocksource.mask = CLOCKSOURCE_MASK(bits);
+
+	/* Calculate a somewhat reasonable rating value. */
+	gic_clocksource.rating = 200 + frequency / 10000000;
+
+	clocksource_register_hz(&gic_clocksource, frequency);
+}

arch/mips/kernel/early_printk.c

@@ -14,8 +14,7 @@
 
 extern void prom_putchar(char);
 
-static void __init
-early_console_write(struct console *con, const char *s, unsigned n)
+static void early_console_write(struct console *con, const char *s, unsigned n)
 {
 	while (n-- && *s) {
 		if (*s == '\n')
@@ -25,7 +24,7 @@ early_console_write(struct console *con, const char *s, unsigned n)
 	}
 }
 
-static struct console early_console __initdata = {
+static struct console early_console = {
 	.name	= "early",
 	.write	= early_console_write,
 	.flags	= CON_PRINTBUFFER | CON_BOOT,

arch/mips/kernel/irq_cpu.c

@@ -31,6 +31,7 @@
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/irq.h>
+#include <linux/irqdomain.h>
 
 #include <asm/irq_cpu.h>
 #include <asm/mipsregs.h>
@@ -113,3 +114,44 @@ void __init mips_cpu_irq_init(void)
 		irq_set_chip_and_handler(i, &mips_cpu_irq_controller,
 					 handle_percpu_irq);
 }
+
+#ifdef CONFIG_IRQ_DOMAIN
+static int mips_cpu_intc_map(struct irq_domain *d, unsigned int irq,
+			     irq_hw_number_t hw)
+{
+	static struct irq_chip *chip;
+
+	if (hw < 2 && cpu_has_mipsmt) {
+		/* Software interrupts are used for MT/CMT IPI */
+		chip = &mips_mt_cpu_irq_controller;
+	} else {
+		chip = &mips_cpu_irq_controller;
+	}
+
+	irq_set_chip_and_handler(irq, chip, handle_percpu_irq);
+
+	return 0;
+}
+
+static const struct irq_domain_ops mips_cpu_intc_irq_domain_ops = {
+	.map = mips_cpu_intc_map,
+	.xlate = irq_domain_xlate_onecell,
+};
+
+int __init mips_cpu_intc_init(struct device_node *of_node,
+			      struct device_node *parent)
+{
+	struct irq_domain *domain;
+
+	/* Mask interrupts. */
+	clear_c0_status(ST0_IM);
+	clear_c0_cause(CAUSEF_IP);
+
+	domain = irq_domain_add_legacy(of_node, 8, MIPS_CPU_IRQ_BASE, 0,
+				       &mips_cpu_intc_irq_domain_ops, NULL);
+	if (!domain)
+		panic("Failed to add irqdomain for MIPS CPU\n");
+
+	return 0;
+}
+#endif /* CONFIG_IRQ_DOMAIN */

arch/mips/kernel/proc.c

@@ -95,6 +95,8 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 	if (cpu_has_dsp)	seq_printf(m, "%s", " dsp");
 	if (cpu_has_dsp2)	seq_printf(m, "%s", " dsp2");
 	if (cpu_has_mipsmt)	seq_printf(m, "%s", " mt");
+	if (cpu_has_mmips)	seq_printf(m, "%s", " micromips");
+	if (cpu_has_vz)		seq_printf(m, "%s", " vz");
 	seq_printf(m, "\n");
 
 	seq_printf(m, "shadow register sets\t: %d\n",

arch/mips/kernel/setup.c

@@ -480,34 +480,75 @@ static int __init early_parse_mem(char *p)
 }
 early_param("mem", early_parse_mem);
 
+#ifdef CONFIG_PROC_VMCORE
+unsigned long setup_elfcorehdr, setup_elfcorehdr_size;
+static int __init early_parse_elfcorehdr(char *p)
+{
+	int i;
+
+	setup_elfcorehdr = memparse(p, &p);
+
+	for (i = 0; i < boot_mem_map.nr_map; i++) {
+		unsigned long start = boot_mem_map.map[i].addr;
+		unsigned long end = (boot_mem_map.map[i].addr +
+				     boot_mem_map.map[i].size);
+		if (setup_elfcorehdr >= start && setup_elfcorehdr < end) {
+			/*
+			 * Reserve from the elf core header to the end of
+			 * the memory segment, that should all be kdump
+			 * reserved memory.
+			 */
+			setup_elfcorehdr_size = end - setup_elfcorehdr;
+			break;
+		}
+	}
+	/*
+	 * If we don't find it in the memory map, then we shouldn't
+	 * have to worry about it, as the new kernel won't use it.
+	 */
+	return 0;
+}
+early_param("elfcorehdr", early_parse_elfcorehdr);
+#endif
+
+static void __init arch_mem_addpart(phys_t mem, phys_t end, int type)
+{
+	phys_t size;
+	int i;
+
+	size = end - mem;
+	if (!size)
+		return;
+
+	/* Make sure it is in the boot_mem_map */
+	for (i = 0; i < boot_mem_map.nr_map; i++) {
+		if (mem >= boot_mem_map.map[i].addr &&
+		    mem < (boot_mem_map.map[i].addr +
+			   boot_mem_map.map[i].size))
+			return;
+	}
+	add_memory_region(mem, size, type);
+}
+
 static void __init arch_mem_init(char **cmdline_p)
 {
-	phys_t init_mem, init_end, init_size;
-
 	extern void plat_mem_setup(void);
 
 	/* call board setup routine */
 	plat_mem_setup();
 
-	init_mem = PFN_UP(__pa_symbol(&__init_begin)) << PAGE_SHIFT;
-	init_end = PFN_DOWN(__pa_symbol(&__init_end)) << PAGE_SHIFT;
-	init_size = init_end - init_mem;
-	if (init_size) {
-		/* Make sure it is in the boot_mem_map */
-		int i, found;
-		found = 0;
-		for (i = 0; i < boot_mem_map.nr_map; i++) {
-			if (init_mem >= boot_mem_map.map[i].addr &&
-			    init_mem < (boot_mem_map.map[i].addr +
-					boot_mem_map.map[i].size)) {
-				found = 1;
-				break;
-			}
-		}
-		if (!found)
-			add_memory_region(init_mem, init_size,
-					  BOOT_MEM_INIT_RAM);
-	}
+	/*
+	 * Make sure all kernel memory is in the maps.  The "UP" and
+	 * "DOWN" are opposite for initdata since if it crosses over
+	 * into another memory section you don't want that to be
+	 * freed when the initdata is freed.
+	 */
+	arch_mem_addpart(PFN_DOWN(__pa_symbol(&_text)) << PAGE_SHIFT,
+			 PFN_UP(__pa_symbol(&_edata)) << PAGE_SHIFT,
+			 BOOT_MEM_RAM);
+	arch_mem_addpart(PFN_UP(__pa_symbol(&__init_begin)) << PAGE_SHIFT,
+			 PFN_DOWN(__pa_symbol(&__init_end)) << PAGE_SHIFT,
+			 BOOT_MEM_INIT_RAM);
 
 	pr_info("Determined physical RAM map:\n");
 	print_memory_map();
@@ -537,6 +578,14 @@ static void __init arch_mem_init(char **cmdline_p)
 	}
 
 	bootmem_init();
+#ifdef CONFIG_PROC_VMCORE
+	if (setup_elfcorehdr && setup_elfcorehdr_size) {
+		printk(KERN_INFO "kdump reserved memory at %lx-%lx\n",
+		       setup_elfcorehdr, setup_elfcorehdr_size);
+		reserve_bootmem(setup_elfcorehdr, setup_elfcorehdr_size,
+				BOOTMEM_DEFAULT);
+	}
+#endif
 #ifdef CONFIG_KEXEC
 	if (crashk_res.start != crashk_res.end)
 		reserve_bootmem(crashk_res.start,

arch/mips/kernel/smtc.c

@@ -41,6 +41,7 @@
 #include <asm/addrspace.h>
 #include <asm/smtc.h>
 #include <asm/smtc_proc.h>
+#include <asm/setup.h>
 
 /*
  * SMTC Kernel needs to manipulate low-level CPU interrupt mask

arch/mips/kernel/vpe.c

@@ -697,18 +697,7 @@ static int vpe_run(struct vpe * v)
 	dmt_flag = dmt();
 	vpeflags = dvpe();
 
-	if (!list_empty(&v->tc)) {
-		if ((t = list_entry(v->tc.next, struct tc, tc)) == NULL) {
-			evpe(vpeflags);
-			emt(dmt_flag);
-			local_irq_restore(flags);
-
-			printk(KERN_WARNING
-			       "VPE loader: TC %d is already in use.\n",
-			       v->tc->index);
-			return -ENOEXEC;
-		}
-	} else {
+	if (list_empty(&v->tc)) {
 		evpe(vpeflags);
 		emt(dmt_flag);
 		local_irq_restore(flags);
@@ -720,6 +709,8 @@ static int vpe_run(struct vpe * v)
 		return -ENOEXEC;
 	}
 
+	t = list_first_entry(&v->tc, struct tc, tc);
+
 	/* Put MVPE's into 'configuration state' */
 	set_c0_mvpcontrol(MVPCONTROL_VPC);