Merge branch 'mips-next-3.10' of git://git.linux-mips.org/pub/scm/john/linux-john into mips-for-linux-next

8 files changed, 75 insertions, 54 deletions

diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index f81d98f6184..cdb87b2a423 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -5,7 +5,7 @@
 extra-y		:= head.o vmlinux.lds
 
 obj-y		+= cpu-probe.o branch.o entry.o genex.o irq.o process.o \
-		   ptrace.o reset.o setup.o signal.o syscall.o \
+		   prom.o ptrace.o reset.o setup.o signal.o syscall.o \
 		   time.o topology.o traps.o unaligned.o watch.o vdso.o
 
 ifdef CONFIG_FUNCTION_TRACER
@@ -86,8 +86,6 @@ obj-$(CONFIG_EARLY_PRINTK)	+= early_printk.o
 obj-$(CONFIG_SPINLOCK_TEST)	+= spinlock_test.o
 obj-$(CONFIG_MIPS_MACHINE)	+= mips_machine.o
 
-obj-$(CONFIG_OF)		+= prom.o
-
 CFLAGS_cpu-bugs64.o	= $(shell if $(CC) $(KBUILD_CFLAGS) -Wa,-mdaddi -c -o /dev/null -x c /dev/null >/dev/null 2>&1; then echo "-DHAVE_AS_SET_DADDI"; fi)
 
 obj-$(CONFIG_HAVE_STD_PC_SERIAL_PORT)	+= 8250-platform.o
@@ -100,29 +98,16 @@ obj-$(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.
+# DSP ASE supported for MIPS32 or MIPS64 Release 2 cores only. It is not
+# safe to unconditionnaly use the assembler -mdsp / -mdspr2 switches
+# here because the compiler may use DSP ASE instructions (such as lwx) in
+# code paths where we cannot check that the CPU we are running on supports it.
+# Proper abstraction using HAVE_AS_DSP and macros is done in
+# arch/mips/include/asm/mipsregs.h.
 #
 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)
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index d069a19112e..5fe66a0c322 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -1227,10 +1227,8 @@ __cpuinit void cpu_probe(void)
 	if (c->options & MIPS_CPU_FPU) {
 		c->fpu_id = cpu_get_fpu_id();
 
-		if (c->isa_level == MIPS_CPU_ISA_M32R1 ||
-		    c->isa_level == MIPS_CPU_ISA_M32R2 ||
-		    c->isa_level == MIPS_CPU_ISA_M64R1 ||
-		    c->isa_level == MIPS_CPU_ISA_M64R2) {
+		if (c->isa_level & (MIPS_CPU_ISA_M32R1 | MIPS_CPU_ISA_M32R2 |
+				    MIPS_CPU_ISA_M64R1 | MIPS_CPU_ISA_M64R2)) {
 			if (c->fpu_id & MIPS_FPIR_3D)
 				c->ases |= MIPS_ASE_MIPS3D;
 		}
diff --git a/arch/mips/kernel/mcount.S b/arch/mips/kernel/mcount.S
index 16586767335..33d067148e6 100644
--- a/arch/mips/kernel/mcount.S
+++ b/arch/mips/kernel/mcount.S
@@ -46,10 +46,9 @@
 	PTR_L	a5, PT_R9(sp)
 	PTR_L	a6, PT_R10(sp)
 	PTR_L	a7, PT_R11(sp)
-#else
-	PTR_ADDIU	sp, PT_SIZE
 #endif
-.endm
+	PTR_ADDIU	sp, PT_SIZE
+	.endm
 
 	.macro RETURN_BACK
 	jr ra
@@ -68,7 +67,11 @@ NESTED(ftrace_caller, PT_SIZE, ra)
 	.globl _mcount
 _mcount:
 	b	ftrace_stub
-	addiu sp,sp,8
+#ifdef CONFIG_32BIT
+	 addiu sp,sp,8
+#else
+	 nop
+#endif
 
 	/* When tracing is activated, it calls ftrace_caller+8 (aka here) */
 	lw	t1, function_trace_stop
diff --git a/arch/mips/kernel/mips_machine.c b/arch/mips/kernel/mips_machine.c
index 411a058d2c5..87609752969 100644
--- a/arch/mips/kernel/mips_machine.c
+++ b/arch/mips/kernel/mips_machine.c
@@ -11,9 +11,9 @@
 #include <linux/slab.h>
 
 #include <asm/mips_machine.h>
+#include <asm/prom.h>
 
 static struct mips_machine *mips_machine __initdata;
-static char *mips_machine_name = "Unknown";
 
 #define for_each_machine(mach) \
 	for ((mach) = (struct mips_machine *)&__mips_machines_start; \
@@ -21,25 +21,6 @@ static char *mips_machine_name = "Unknown";
 	     (unsigned long)(mach) < (unsigned long)&__mips_machines_end; \
 	     (mach)++)
 
-__init void mips_set_machine_name(const char *name)
-{
-	char *p;
-
-	if (name == NULL)
-		return;
-
-	p = kstrdup(name, GFP_KERNEL);
-	if (!p)
-		pr_err("MIPS: no memory for machine_name\n");
-
-	mips_machine_name = p;
-}
-
-char *mips_get_machine_name(void)
-{
-	return mips_machine_name;
-}
-
 __init int mips_machtype_setup(char *id)
 {
 	struct mips_machine *mach;
@@ -79,7 +60,6 @@ __init void mips_machine_setup(void)
 		return;
 
 	mips_set_machine_name(mips_machine->mach_name);
-	pr_info("MIPS: machine is %s\n", mips_machine_name);
 
 	if (mips_machine->mach_setup)
 		mips_machine->mach_setup();
diff --git a/arch/mips/kernel/proc.c b/arch/mips/kernel/proc.c
index 135c4aadccb..1dd137bab5c 100644
--- a/arch/mips/kernel/proc.c
+++ b/arch/mips/kernel/proc.c
@@ -12,7 +12,7 @@
 #include <asm/cpu-features.h>
 #include <asm/mipsregs.h>
 #include <asm/processor.h>
-#include <asm/mips_machine.h>
+#include <asm/prom.h>
 
 unsigned int vced_count, vcei_count;
 
@@ -67,7 +67,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 	if (cpu_has_mips_r) {
 		seq_printf(m, "isa\t\t\t:");
 		if (cpu_has_mips_1)
-			seq_printf(m, "%s", "mips1");
+			seq_printf(m, "%s", " mips1");
 		if (cpu_has_mips_2)
 			seq_printf(m, "%s", " mips2");
 		if (cpu_has_mips_3)
diff --git a/arch/mips/kernel/prom.c b/arch/mips/kernel/prom.c
index 028f6f837ef..5712bb53224 100644
--- a/arch/mips/kernel/prom.c
+++ b/arch/mips/kernel/prom.c
@@ -23,6 +23,23 @@
 #include <asm/page.h>
 #include <asm/prom.h>
 
+static char mips_machine_name[64] = "Unknown";
+
+__init void mips_set_machine_name(const char *name)
+{
+	if (name == NULL)
+		return;
+
+	strncpy(mips_machine_name, name, sizeof(mips_machine_name));
+	pr_info("MIPS: machine is %s\n", mips_get_machine_name());
+}
+
+char *mips_get_machine_name(void)
+{
+	return mips_machine_name;
+}
+
+#ifdef CONFIG_OF
 int __init early_init_dt_scan_memory_arch(unsigned long node,
 					  const char *uname, int depth,
 					  void *data)
@@ -50,6 +67,18 @@ void __init early_init_dt_setup_initrd_arch(unsigned long start,
 }
 #endif
 
+int __init early_init_dt_scan_model(unsigned long node,	const char *uname,
+				    int depth, void *data)
+{
+	if (!depth) {
+		char *model = of_get_flat_dt_prop(node, "model", NULL);
+
+		if (model)
+			mips_set_machine_name(model);
+	}
+	return 0;
+}
+
 void __init early_init_devtree(void *params)
 {
 	/* Setup flat device-tree pointer */
@@ -65,6 +94,9 @@ void __init early_init_devtree(void *params)
 	/* Scan memory nodes */
 	of_scan_flat_dt(early_init_dt_scan_root, NULL);
 	of_scan_flat_dt(early_init_dt_scan_memory_arch, NULL);
+
+	/* try to load the mips machine name */
+	of_scan_flat_dt(early_init_dt_scan_model, NULL);
 }
 
 void __init __dt_setup_arch(struct boot_param_header *bph)
@@ -79,3 +111,4 @@ void __init __dt_setup_arch(struct boot_param_header *bph)
 
 	early_init_devtree(initial_boot_params);
 }
+#endif
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 4c774d5d508..c7f90519e58 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -23,6 +23,7 @@
 #include <linux/pfn.h>
 #include <linux/debugfs.h>
 #include <linux/kexec.h>
+#include <linux/sizes.h>
 
 #include <asm/addrspace.h>
 #include <asm/bootinfo.h>
@@ -77,6 +78,8 @@ EXPORT_SYMBOL(mips_io_port_base);
 static struct resource code_resource = { .name = "Kernel code", };
 static struct resource data_resource = { .name = "Kernel data", };
 
+static void *detect_magic __initdata = detect_memory_region;
+
 void __init add_memory_region(phys_t start, phys_t size, long type)
 {
 	int x = boot_mem_map.nr_map;
@@ -122,6 +125,25 @@ void __init add_memory_region(phys_t start, phys_t size, long type)
 	boot_mem_map.nr_map++;
 }
 
+void __init detect_memory_region(phys_t start, phys_t sz_min, phys_t sz_max)
+{
+	void *dm = &detect_magic;
+	phys_t size;
+
+	for (size = sz_min; size < sz_max; size <<= 1) {
+		if (!memcmp(dm, dm + size, sizeof(detect_magic)))
+			break;
+	}
+
+	pr_debug("Memory: %lluMB of RAM detected at 0x%llx (min: %lluMB, max: %lluMB)\n",
+		((unsigned long long) size) / SZ_1M,
+		(unsigned long long) start,
+		((unsigned long long) sz_min) / SZ_1M,
+		((unsigned long long) sz_max) / SZ_1M);
+
+	add_memory_region(start, size, BOOT_MEM_RAM);
+}
+
 static void __init print_memory_map(void)
 {
 	int i;
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index feb42c07238..3b98b7b8487 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -1570,7 +1570,7 @@ void __cpuinit per_cpu_trap_init(bool is_boot_cpu)
 #ifdef CONFIG_64BIT
 	status_set |= ST0_FR|ST0_KX|ST0_SX|ST0_UX;
 #endif
-	if (current_cpu_data.isa_level == MIPS_CPU_ISA_IV)
+	if (current_cpu_data.isa_level & MIPS_CPU_ISA_IV)
 		status_set |= ST0_XX;
 	if (cpu_has_dsp)
 		status_set |= ST0_MX;