Merge commit 'v2.6.28-rc2' into core/locking

Conflicts:
	arch/um/include/asm/system.h

1 files changed, 58 insertions, 221 deletions

diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 2ca7038b67a..1f1eecca7f5 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -26,11 +26,13 @@
 #include <linux/fs.h>
 
 #include <asm/cpu.h>
+#include <asm/cputype.h>
 #include <asm/elf.h>
 #include <asm/procinfo.h>
 #include <asm/setup.h>
 #include <asm/mach-types.h>
 #include <asm/cacheflush.h>
+#include <asm/cachetype.h>
 #include <asm/tlbflush.h>
 
 #include <asm/mach/arch.h>
@@ -59,13 +61,14 @@ __setup("fpe=", fpe_setup);
 
 extern void paging_init(struct meminfo *, struct machine_desc *desc);
 extern void reboot_setup(char *str);
-extern int root_mountflags;
-extern void _stext, _text, _etext, __data_start, _edata, _end;
+extern void _text, _etext, __data_start, _edata, _end;
 
 unsigned int processor_id;
 EXPORT_SYMBOL(processor_id);
 unsigned int __machine_arch_type;
 EXPORT_SYMBOL(__machine_arch_type);
+unsigned int cacheid;
+EXPORT_SYMBOL(cacheid);
 
 unsigned int __atags_pointer __initdata;
 
@@ -81,8 +84,6 @@ EXPORT_SYMBOL(system_serial_high);
 unsigned int elf_hwcap;
 EXPORT_SYMBOL(elf_hwcap);
 
-unsigned long __initdata vmalloc_reserve = 128 << 20;
-
 
 #ifdef MULTI_CPU
 struct processor processor;
@@ -111,9 +112,6 @@ static struct stack stacks[NR_CPUS];
 char elf_platform[ELF_PLATFORM_SIZE];
 EXPORT_SYMBOL(elf_platform);
 
-unsigned long phys_initrd_start __initdata = 0;
-unsigned long phys_initrd_size __initdata = 0;
-
 static struct meminfo meminfo __initdata = { 0, };
 static const char *cpu_name;
 static const char *machine_name;
@@ -178,63 +176,6 @@ static struct resource io_res[] = {
 #define lp1 io_res[1]
 #define lp2 io_res[2]
 
-static const char *cache_types[16] = {
-	"write-through",
-	"write-back",
-	"write-back",
-	"undefined 3",
-	"undefined 4",
-	"undefined 5",
-	"write-back",
-	"write-back",
-	"undefined 8",
-	"undefined 9",
-	"undefined 10",
-	"undefined 11",
-	"undefined 12",
-	"undefined 13",
-	"write-back",
-	"undefined 15",
-};
-
-static const char *cache_clean[16] = {
-	"not required",
-	"read-block",
-	"cp15 c7 ops",
-	"undefined 3",
-	"undefined 4",
-	"undefined 5",
-	"cp15 c7 ops",
-	"cp15 c7 ops",
-	"undefined 8",
-	"undefined 9",
-	"undefined 10",
-	"undefined 11",
-	"undefined 12",
-	"undefined 13",
-	"cp15 c7 ops",
-	"undefined 15",
-};
-
-static const char *cache_lockdown[16] = {
-	"not supported",
-	"not supported",
-	"not supported",
-	"undefined 3",
-	"undefined 4",
-	"undefined 5",
-	"format A",
-	"format B",
-	"undefined 8",
-	"undefined 9",
-	"undefined 10",
-	"undefined 11",
-	"undefined 12",
-	"undefined 13",
-	"format C",
-	"undefined 15",
-};
-
 static const char *proc_arch[] = {
 	"undefined/unknown",
 	"3",
@@ -255,61 +196,19 @@ static const char *proc_arch[] = {
 	"?(17)",
 };
 
-#define CACHE_TYPE(x)	(((x) >> 25) & 15)
-#define CACHE_S(x)	((x) & (1 << 24))
-#define CACHE_DSIZE(x)	(((x) >> 12) & 4095)	/* only if S=1 */
-#define CACHE_ISIZE(x)	((x) & 4095)
-
-#define CACHE_SIZE(y)	(((y) >> 6) & 7)
-#define CACHE_ASSOC(y)	(((y) >> 3) & 7)
-#define CACHE_M(y)	((y) & (1 << 2))
-#define CACHE_LINE(y)	((y) & 3)
-
-static inline void dump_cache(const char *prefix, int cpu, unsigned int cache)
-{
-	unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0);
-
-	printk("CPU%u: %s: %d bytes, associativity %d, %d byte lines, %d sets\n",
-		cpu, prefix,
-		mult << (8 + CACHE_SIZE(cache)),
-		(mult << CACHE_ASSOC(cache)) >> 1,
-		8 << CACHE_LINE(cache),
-		1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) -
-			CACHE_LINE(cache)));
-}
-
-static void __init dump_cpu_info(int cpu)
-{
-	unsigned int info = read_cpuid(CPUID_CACHETYPE);
-
-	if (info != processor_id) {
-		printk("CPU%u: D %s %s cache\n", cpu, cache_is_vivt() ? "VIVT" : "VIPT",
-		       cache_types[CACHE_TYPE(info)]);
-		if (CACHE_S(info)) {
-			dump_cache("I cache", cpu, CACHE_ISIZE(info));
-			dump_cache("D cache", cpu, CACHE_DSIZE(info));
-		} else {
-			dump_cache("cache", cpu, CACHE_ISIZE(info));
-		}
-	}
-
-	if (arch_is_coherent())
-		printk("Cache coherency enabled\n");
-}
-
 int cpu_architecture(void)
 {
 	int cpu_arch;
 
-	if ((processor_id & 0x0008f000) == 0) {
+	if ((read_cpuid_id() & 0x0008f000) == 0) {
 		cpu_arch = CPU_ARCH_UNKNOWN;
-	} else if ((processor_id & 0x0008f000) == 0x00007000) {
-		cpu_arch = (processor_id & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3;
-	} else if ((processor_id & 0x00080000) == 0x00000000) {
-		cpu_arch = (processor_id >> 16) & 7;
+	} else if ((read_cpuid_id() & 0x0008f000) == 0x00007000) {
+		cpu_arch = (read_cpuid_id() & (1 << 23)) ? CPU_ARCH_ARMv4T : CPU_ARCH_ARMv3;
+	} else if ((read_cpuid_id() & 0x00080000) == 0x00000000) {
+		cpu_arch = (read_cpuid_id() >> 16) & 7;
 		if (cpu_arch)
 			cpu_arch += CPU_ARCH_ARMv3;
-	} else if ((processor_id & 0x000f0000) == 0x000f0000) {
+	} else if ((read_cpuid_id() & 0x000f0000) == 0x000f0000) {
 		unsigned int mmfr0;
 
 		/* Revised CPUID format. Read the Memory Model Feature
@@ -330,6 +229,34 @@ int cpu_architecture(void)
 	return cpu_arch;
 }
 
+static void __init cacheid_init(void)
+{
+	unsigned int cachetype = read_cpuid_cachetype();
+	unsigned int arch = cpu_architecture();
+
+	if (arch >= CPU_ARCH_ARMv7) {
+		cacheid = CACHEID_VIPT_NONALIASING;
+		if ((cachetype & (3 << 14)) == 1 << 14)
+			cacheid |= CACHEID_ASID_TAGGED;
+	} else if (arch >= CPU_ARCH_ARMv6) {
+		if (cachetype & (1 << 23))
+			cacheid = CACHEID_VIPT_ALIASING;
+		else
+			cacheid = CACHEID_VIPT_NONALIASING;
+	} else {
+		cacheid = CACHEID_VIVT;
+	}
+
+	printk("CPU: %s data cache, %s instruction cache\n",
+		cache_is_vivt() ? "VIVT" :
+		cache_is_vipt_aliasing() ? "VIPT aliasing" :
+		cache_is_vipt_nonaliasing() ? "VIPT nonaliasing" : "unknown",
+		cache_is_vivt() ? "VIVT" :
+		icache_is_vivt_asid_tagged() ? "VIVT ASID tagged" :
+		cache_is_vipt_aliasing() ? "VIPT aliasing" :
+		cache_is_vipt_nonaliasing() ? "VIPT nonaliasing" : "unknown");
+}
+
 /*
  * These functions re-use the assembly code in head.S, which
  * already provide the required functionality.
@@ -346,10 +273,10 @@ static void __init setup_processor(void)
 	 * types.  The linker builds this table for us from the
 	 * entries in arch/arm/mm/proc-*.S
 	 */
-	list = lookup_processor_type(processor_id);
+	list = lookup_processor_type(read_cpuid_id());
 	if (!list) {
 		printk("CPU configuration botched (ID %08x), unable "
-		       "to continue.\n", processor_id);
+		       "to continue.\n", read_cpuid_id());
 		while (1);
 	}
 
@@ -369,7 +296,7 @@ static void __init setup_processor(void)
 #endif
 
 	printk("CPU: %s [%08x] revision %d (ARMv%s), cr=%08lx\n",
-	       cpu_name, processor_id, (int)processor_id & 15,
+	       cpu_name, read_cpuid_id(), read_cpuid_id() & 15,
 	       proc_arch[cpu_architecture()], cr_alignment);
 
 	sprintf(init_utsname()->machine, "%s%c", list->arch_name, ENDIANNESS);
@@ -379,14 +306,14 @@ static void __init setup_processor(void)
 	elf_hwcap &= ~HWCAP_THUMB;
 #endif
 
+	cacheid_init();
 	cpu_proc_init();
 }
 
 /*
  * cpu_init - initialise one CPU.
  *
- * cpu_init dumps the cache information, initialises SMP specific
- * information, and sets up the per-CPU stacks.
+ * cpu_init sets up the per-CPU stacks.
  */
 void cpu_init(void)
 {
@@ -398,9 +325,6 @@ void cpu_init(void)
 		BUG();
 	}
 
-	if (system_state == SYSTEM_BOOTING)
-		dump_cpu_info(cpu);
-
 	/*
 	 * setup stacks for re-entrant exception handlers
 	 */
@@ -443,20 +367,6 @@ static struct machine_desc * __init setup_machine(unsigned int nr)
 	return list;
 }
 
-static void __init early_initrd(char **p)
-{
-	unsigned long start, size;
-
-	start = memparse(*p, p);
-	if (**p == ',') {
-		size = memparse((*p) + 1, p);
-
-		phys_initrd_start = start;
-		phys_initrd_size = size;
-	}
-}
-__early_param("initrd=", early_initrd);
-
 static void __init arm_add_memory(unsigned long start, unsigned long size)
 {
 	struct membank *bank;
@@ -503,17 +413,6 @@ static void __init early_mem(char **p)
 __early_param("mem=", early_mem);
 
 /*
- * vmalloc=size forces the vmalloc area to be exactly 'size'
- * bytes. This can be used to increase (or decrease) the vmalloc
- * area - the default is 128m.
- */
-static void __init early_vmalloc(char **arg)
-{
-	vmalloc_reserve = memparse(*arg, arg);
-}
-__early_param("vmalloc=", early_vmalloc);
-
-/*
  * Initial parsing of the command line.
  */
 static void __init parse_cmdline(char **cmdline_p, char *from)
@@ -527,12 +426,12 @@ static void __init parse_cmdline(char **cmdline_p, char *from)
 			struct early_params *p;
 
 			for (p = &__early_begin; p < &__early_end; p++) {
-				int len = strlen(p->arg);
+				int arglen = strlen(p->arg);
 
-				if (memcmp(from, p->arg, len) == 0) {
+				if (memcmp(from, p->arg, arglen) == 0) {
 					if (to != command_line)
 						to -= 1;
-					from += len;
+					from += arglen;
 					p->fn(&from);
 
 					while (*from != ' ' && *from != '\0')
@@ -579,18 +478,13 @@ request_standard_resources(struct meminfo *mi, struct machine_desc *mdesc)
 	kernel_data.end     = virt_to_phys(&_end - 1);
 
 	for (i = 0; i < mi->nr_banks; i++) {
-		unsigned long virt_start, virt_end;
-
 		if (mi->bank[i].size == 0)
 			continue;
 
-		virt_start = __phys_to_virt(mi->bank[i].start);
-		virt_end   = virt_start + mi->bank[i].size - 1;
-
 		res = alloc_bootmem_low(sizeof(*res));
 		res->name  = "System RAM";
-		res->start = __virt_to_phys(virt_start);
-		res->end   = __virt_to_phys(virt_end);
+		res->start = mi->bank[i].start;
+		res->end   = mi->bank[i].start + mi->bank[i].size - 1;
 		res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
 
 		request_resource(&iomem_resource, res);
@@ -694,26 +588,6 @@ static int __init parse_tag_ramdisk(const struct tag *tag)
 
 __tagtable(ATAG_RAMDISK, parse_tag_ramdisk);
 
-static int __init parse_tag_initrd(const struct tag *tag)
-{
-	printk(KERN_WARNING "ATAG_INITRD is deprecated; "
-		"please update your bootloader.\n");
-	phys_initrd_start = __virt_to_phys(tag->u.initrd.start);
-	phys_initrd_size = tag->u.initrd.size;
-	return 0;
-}
-
-__tagtable(ATAG_INITRD, parse_tag_initrd);
-
-static int __init parse_tag_initrd2(const struct tag *tag)
-{
-	phys_initrd_start = tag->u.initrd.start;
-	phys_initrd_size = tag->u.initrd.size;
-	return 0;
-}
-
-__tagtable(ATAG_INITRD2, parse_tag_initrd2);
-
 static int __init parse_tag_serialnr(const struct tag *tag)
 {
 	system_serial_low = tag->u.serialnr.low;
@@ -901,28 +775,12 @@ static const char *hwcap_str[] = {
 	NULL
 };
 
-static void
-c_show_cache(struct seq_file *m, const char *type, unsigned int cache)
-{
-	unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0);
-
-	seq_printf(m, "%s size\t\t: %d\n"
-		      "%s assoc\t\t: %d\n"
-		      "%s line length\t: %d\n"
-		      "%s sets\t\t: %d\n",
-		type, mult << (8 + CACHE_SIZE(cache)),
-		type, (mult << CACHE_ASSOC(cache)) >> 1,
-		type, 8 << CACHE_LINE(cache),
-		type, 1 << (6 + CACHE_SIZE(cache) - CACHE_ASSOC(cache) -
-			    CACHE_LINE(cache)));
-}
-
 static int c_show(struct seq_file *m, void *v)
 {
 	int i;
 
 	seq_printf(m, "Processor\t: %s rev %d (%s)\n",
-		   cpu_name, (int)processor_id & 15, elf_platform);
+		   cpu_name, read_cpuid_id() & 15, elf_platform);
 
 #if defined(CONFIG_SMP)
 	for_each_online_cpu(i) {
@@ -949,47 +807,26 @@ static int c_show(struct seq_file *m, void *v)
 		if (elf_hwcap & (1 << i))
 			seq_printf(m, "%s ", hwcap_str[i]);
 
-	seq_printf(m, "\nCPU implementer\t: 0x%02x\n", processor_id >> 24);
+	seq_printf(m, "\nCPU implementer\t: 0x%02x\n", read_cpuid_id() >> 24);
 	seq_printf(m, "CPU architecture: %s\n", proc_arch[cpu_architecture()]);
 
-	if ((processor_id & 0x0008f000) == 0x00000000) {
+	if ((read_cpuid_id() & 0x0008f000) == 0x00000000) {
 		/* pre-ARM7 */
-		seq_printf(m, "CPU part\t: %07x\n", processor_id >> 4);
+		seq_printf(m, "CPU part\t: %07x\n", read_cpuid_id() >> 4);
 	} else {
-		if ((processor_id & 0x0008f000) == 0x00007000) {
+		if ((read_cpuid_id() & 0x0008f000) == 0x00007000) {
 			/* ARM7 */
 			seq_printf(m, "CPU variant\t: 0x%02x\n",
-				   (processor_id >> 16) & 127);
+				   (read_cpuid_id() >> 16) & 127);
 		} else {
 			/* post-ARM7 */
 			seq_printf(m, "CPU variant\t: 0x%x\n",
-				   (processor_id >> 20) & 15);
+				   (read_cpuid_id() >> 20) & 15);
 		}
 		seq_printf(m, "CPU part\t: 0x%03x\n",
-			   (processor_id >> 4) & 0xfff);
-	}
-	seq_printf(m, "CPU revision\t: %d\n", processor_id & 15);
-
-	{
-		unsigned int cache_info = read_cpuid(CPUID_CACHETYPE);
-		if (cache_info != processor_id) {
-			seq_printf(m, "Cache type\t: %s\n"
-				      "Cache clean\t: %s\n"
-				      "Cache lockdown\t: %s\n"
-				      "Cache format\t: %s\n",
-				   cache_types[CACHE_TYPE(cache_info)],
-				   cache_clean[CACHE_TYPE(cache_info)],
-				   cache_lockdown[CACHE_TYPE(cache_info)],
-				   CACHE_S(cache_info) ? "Harvard" : "Unified");
-
-			if (CACHE_S(cache_info)) {
-				c_show_cache(m, "I", CACHE_ISIZE(cache_info));
-				c_show_cache(m, "D", CACHE_DSIZE(cache_info));
-			} else {
-				c_show_cache(m, "Cache", CACHE_ISIZE(cache_info));
-			}
-		}
+			   (read_cpuid_id() >> 4) & 0xfff);
 	}
+	seq_printf(m, "CPU revision\t: %d\n", read_cpuid_id() & 15);
 
 	seq_puts(m, "\n");