1 files changed, 110 insertions, 69 deletions

diff --git a/arch/sh/kernel/cpu/init.c b/arch/sh/kernel/cpu/init.c
index ad85421099cd..fac742e514ee 100644
--- a/arch/sh/kernel/cpu/init.c
+++ b/arch/sh/kernel/cpu/init.c
@@ -3,7 +3,7 @@
  *
  * CPU init code
  *
- * Copyright (C) 2002 - 2007  Paul Mundt
+ * Copyright (C) 2002 - 2009  Paul Mundt
  * Copyright (C) 2003  Richard Curnow
  *
  * This file is subject to the terms and conditions of the GNU General Public
@@ -24,22 +24,32 @@
 #include <asm/elf.h>
 #include <asm/io.h>
 #include <asm/smp.h>
-#ifdef CONFIG_SUPERH32
-#include <asm/ubc.h>
+#include <asm/sh_bios.h>
+
+#ifdef CONFIG_SH_FPU
+#define cpu_has_fpu	1
+#else
+#define cpu_has_fpu	0
+#endif
+
+#ifdef CONFIG_SH_DSP
+#define cpu_has_dsp	1
+#else
+#define cpu_has_dsp	0
 #endif
 
 /*
  * Generic wrapper for command line arguments to disable on-chip
  * peripherals (nofpu, nodsp, and so forth).
  */
-#define onchip_setup(x)				\
-static int x##_disabled __initdata = 0;		\
-						\
-static int __init x##_setup(char *opts)		\
-{						\
-	x##_disabled = 1;			\
-	return 1;				\
-}						\
+#define onchip_setup(x)					\
+static int x##_disabled __cpuinitdata = !cpu_has_##x;	\
+							\
+static int __cpuinit x##_setup(char *opts)			\
+{							\
+	x##_disabled = 1;				\
+	return 1;					\
+}							\
 __setup("no" __stringify(x), x##_setup);
 
 onchip_setup(fpu);
@@ -49,21 +59,47 @@ onchip_setup(dsp);
 #define CPUOPM		0xff2f0000
 #define CPUOPM_RABD	(1 << 5)
 
-static void __init speculative_execution_init(void)
+static void __cpuinit speculative_execution_init(void)
 {
 	/* Clear RABD */
-	ctrl_outl(ctrl_inl(CPUOPM) & ~CPUOPM_RABD, CPUOPM);
+	__raw_writel(__raw_readl(CPUOPM) & ~CPUOPM_RABD, CPUOPM);
 
 	/* Flush the update */
-	(void)ctrl_inl(CPUOPM);
+	(void)__raw_readl(CPUOPM);
 	ctrl_barrier();
 }
 #else
 #define speculative_execution_init()	do { } while (0)
 #endif
 
+#ifdef CONFIG_CPU_SH4A
+#define EXPMASK			0xff2f0004
+#define EXPMASK_RTEDS		(1 << 0)
+#define EXPMASK_BRDSSLP		(1 << 1)
+#define EXPMASK_MMCAW		(1 << 4)
+
+static void __cpuinit expmask_init(void)
+{
+	unsigned long expmask = __raw_readl(EXPMASK);
+
+	/*
+	 * Future proofing.
+	 *
+	 * Disable support for slottable sleep instruction, non-nop
+	 * instructions in the rte delay slot, and associative writes to
+	 * the memory-mapped cache array.
+	 */
+	expmask &= ~(EXPMASK_RTEDS | EXPMASK_BRDSSLP | EXPMASK_MMCAW);
+
+	__raw_writel(expmask, EXPMASK);
+	ctrl_barrier();
+}
+#else
+#define expmask_init()	do { } while (0)
+#endif
+
 /* 2nd-level cache init */
-void __uses_jump_to_uncached __attribute__ ((weak)) l2_cache_init(void)
+void __attribute__ ((weak)) l2_cache_init(void)
 {
 }
 
@@ -71,12 +107,12 @@ void __uses_jump_to_uncached __attribute__ ((weak)) l2_cache_init(void)
  * Generic first-level cache init
  */
 #ifdef CONFIG_SUPERH32
-static void __uses_jump_to_uncached cache_init(void)
+static void cache_init(void)
 {
 	unsigned long ccr, flags;
 
 	jump_to_uncached();
-	ccr = ctrl_inl(CCR);
+	ccr = __raw_readl(CCR);
 
 	/*
 	 * At this point we don't know whether the cache is enabled or not - a
@@ -120,7 +156,7 @@ static void __uses_jump_to_uncached cache_init(void)
 			for (addr = addrstart;
 			     addr < addrstart + waysize;
 			     addr += current_cpu_data.dcache.linesz)
-				ctrl_outl(0, addr);
+				__raw_writel(0, addr);
 
 			addrstart += current_cpu_data.dcache.way_incr;
 		} while (--ways);
@@ -153,7 +189,7 @@ static void __uses_jump_to_uncached cache_init(void)
 
 	l2_cache_init();
 
-	ctrl_outl(flags, CCR);
+	__raw_writel(flags, CCR);
 	back_to_cached();
 }
 #else
@@ -181,8 +217,20 @@ static void detect_cache_shape(void)
 		l2_cache_shape = -1; /* No S-cache */
 }
 
+static void __cpuinit fpu_init(void)
+{
+	/* Disable the FPU */
+	if (fpu_disabled && (current_cpu_data.flags & CPU_HAS_FPU)) {
+		printk("FPU Disabled\n");
+		current_cpu_data.flags &= ~CPU_HAS_FPU;
+	}
+
+	disable_fpu();
+	clear_used_math();
+}
+
 #ifdef CONFIG_SH_DSP
-static void __init release_dsp(void)
+static void __cpuinit release_dsp(void)
 {
 	unsigned long sr;
 
@@ -196,7 +244,7 @@ static void __init release_dsp(void)
 	);
 }
 
-static void __init dsp_init(void)
+static void __cpuinit dsp_init(void)
 {
 	unsigned long sr;
 
@@ -218,34 +266,41 @@ static void __init dsp_init(void)
 	if (sr & SR_DSP)
 		current_cpu_data.flags |= CPU_HAS_DSP;
 
+	/* Disable the DSP */
+	if (dsp_disabled && (current_cpu_data.flags & CPU_HAS_DSP)) {
+		printk("DSP Disabled\n");
+		current_cpu_data.flags &= ~CPU_HAS_DSP;
+	}
+
 	/* Now that we've determined the DSP status, clear the DSP bit. */
 	release_dsp();
 }
+#else
+static inline void __cpuinit dsp_init(void) { }
 #endif /* CONFIG_SH_DSP */
 
 /**
- * sh_cpu_init
+ * cpu_init
  *
- * This is our initial entry point for each CPU, and is invoked on the boot
- * CPU prior to calling start_kernel(). For SMP, a combination of this and
- * start_secondary() will bring up each processor to a ready state prior
- * to hand forking the idle loop.
+ * This is our initial entry point for each CPU, and is invoked on the
+ * boot CPU prior to calling start_kernel(). For SMP, a combination of
+ * this and start_secondary() will bring up each processor to a ready
+ * state prior to hand forking the idle loop.
  *
- * We do all of the basic processor init here, including setting up the
- * caches, FPU, DSP, kicking the UBC, etc. By the time start_kernel() is
- * hit (and subsequently platform_setup()) things like determining the
- * CPU subtype and initial configuration will all be done.
+ * We do all of the basic processor init here, including setting up
+ * the caches, FPU, DSP, etc. By the time start_kernel() is hit (and
+ * subsequently platform_setup()) things like determining the CPU
+ * subtype and initial configuration will all be done.
  *
  * Each processor family is still responsible for doing its own probing
- * and cache configuration in detect_cpu_and_cache_system().
+ * and cache configuration in cpu_probe().
  */
-
-asmlinkage void __init sh_cpu_init(void)
+asmlinkage void __cpuinit cpu_init(void)
 {
 	current_thread_info()->cpu = hard_smp_processor_id();
 
 	/* First, probe the CPU */
-	detect_cpu_and_cache_system();
+	cpu_probe();
 
 	if (current_cpu_data.type == CPU_SH_NONE)
 		panic("Unknown CPU");
@@ -268,28 +323,16 @@ asmlinkage void __init sh_cpu_init(void)
 	cache_init();
 
 	if (raw_smp_processor_id() == 0) {
-#ifdef CONFIG_MMU
 		shm_align_mask = max_t(unsigned long,
 				       current_cpu_data.dcache.way_size - 1,
 				       PAGE_SIZE - 1);
-#endif
 
 		/* Boot CPU sets the cache shape */
 		detect_cache_shape();
 	}
 
-	/* Disable the FPU */
-	if (fpu_disabled) {
-		printk("FPU Disabled\n");
-		current_cpu_data.flags &= ~CPU_HAS_FPU;
-		disable_fpu();
-	}
-
-	/* FPU initialization */
-	if ((current_cpu_data.flags & CPU_HAS_FPU)) {
-		clear_thread_flag(TIF_USEDFPU);
-		clear_used_math();
-	}
+	fpu_init();
+	dsp_init();
 
 	/*
 	 * Initialize the per-CPU ASID cache very early, since the
@@ -297,28 +340,26 @@ asmlinkage void __init sh_cpu_init(void)
 	 */
 	current_cpu_data.asid_cache = NO_CONTEXT;
 
-#ifdef CONFIG_SH_DSP
-	/* Probe for DSP */
-	dsp_init();
+	current_cpu_data.phys_bits = __in_29bit_mode() ? 29 : 32;
 
-	/* Disable the DSP */
-	if (dsp_disabled) {
-		printk("DSP Disabled\n");
-		current_cpu_data.flags &= ~CPU_HAS_DSP;
-		release_dsp();
-	}
-#endif
+	speculative_execution_init();
+	expmask_init();
 
-	/*
-	 * Some brain-damaged loaders decided it would be a good idea to put
-	 * the UBC to sleep. This causes some issues when it comes to things
-	 * like PTRACE_SINGLESTEP or doing hardware watchpoints in GDB.  So ..
-	 * we wake it up and hope that all is well.
-	 */
-#ifdef CONFIG_SUPERH32
-	if (raw_smp_processor_id() == 0)
-		ubc_wakeup();
-#endif
+	/* Do the rest of the boot processor setup */
+	if (raw_smp_processor_id() == 0) {
+		/* Save off the BIOS VBR, if there is one */
+		sh_bios_vbr_init();
 
-	speculative_execution_init();
+		/*
+		 * Setup VBR for boot CPU. Secondary CPUs do this through
+		 * start_secondary().
+		 */
+		per_cpu_trap_init();
+
+		/*
+		 * Boot processor to setup the FP and extended state
+		 * context info.
+		 */
+		init_thread_xstate();
+	}
 }