1 files changed, 257 insertions, 101 deletions

diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 39f3dfe134f..a842154d57d 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -8,12 +8,13 @@
  * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03  Ralf Baechle
  * Copyright (C) 1996 Stoned Elipot
  * Copyright (C) 1999 Silicon Graphics, Inc.
- * Copyright (C) 2000, 2001, 2002, 2007  Maciej W. Rozycki
+ * Copyright (C) 2000, 2001, 2002, 2007	 Maciej W. Rozycki
  */
 #include <linux/init.h>
 #include <linux/ioport.h>
-#include <linux/module.h>
+#include <linux/export.h>
 #include <linux/screen_info.h>
+#include <linux/memblock.h>
 #include <linux/bootmem.h>
 #include <linux/initrd.h>
 #include <linux/root_dev.h>
@@ -21,6 +22,8 @@
 #include <linux/console.h>
 #include <linux/pfn.h>
 #include <linux/debugfs.h>
+#include <linux/kexec.h>
+#include <linux/sizes.h>
 
 #include <asm/addrspace.h>
 #include <asm/bootinfo.h>
@@ -30,7 +33,7 @@
 #include <asm/sections.h>
 #include <asm/setup.h>
 #include <asm/smp-ops.h>
-#include <asm/system.h>
+#include <asm/prom.h>
 
 struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly;
 
@@ -58,48 +61,61 @@ EXPORT_SYMBOL(mips_machtype);
 
 struct boot_mem_map boot_mem_map;
 
-static char command_line[CL_SIZE];
-       char arcs_cmdline[CL_SIZE]=CONFIG_CMDLINE;
+static char __initdata command_line[COMMAND_LINE_SIZE];
+char __initdata arcs_cmdline[COMMAND_LINE_SIZE];
+
+#ifdef CONFIG_CMDLINE_BOOL
+static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
+#endif
 
 /*
  * mips_io_port_base is the begin of the address space to which x86 style
  * I/O ports are mapped.
  */
-const unsigned long mips_io_port_base __read_mostly = -1;
+const unsigned long mips_io_port_base = -1;
 EXPORT_SYMBOL(mips_io_port_base);
 
-/*
- * isa_slot_offset is the address where E(ISA) busaddress 0 is mapped
- * for the processor.
- */
-unsigned long isa_slot_offset;
-EXPORT_SYMBOL(isa_slot_offset);
-
 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;
-	struct boot_mem_map_entry *prev = boot_mem_map.map + x - 1;
+	int i;
 
 	/* Sanity check */
 	if (start + size < start) {
-		printk("Trying to add an invalid memory region, skipped\n");
+		pr_warning("Trying to add an invalid memory region, skipped\n");
 		return;
 	}
 
 	/*
-	 * Try to merge with previous entry if any.  This is far less than
-	 * perfect but is sufficient for most real world cases.
+	 * Try to merge with existing entry, if any.
 	 */
-	if (x && prev->addr + prev->size == start && prev->type == type) {
-		prev->size += size;
+	for (i = 0; i < boot_mem_map.nr_map; i++) {
+		struct boot_mem_map_entry *entry = boot_mem_map.map + i;
+		unsigned long top;
+
+		if (entry->type != type)
+			continue;
+
+		if (start + size < entry->addr)
+			continue;			/* no overlap */
+
+		if (entry->addr + entry->size < start)
+			continue;			/* no overlap */
+
+		top = max(entry->addr + entry->size, start + size);
+		entry->addr = min(entry->addr, start);
+		entry->size = top - entry->addr;
+
 		return;
 	}
 
-	if (x == BOOT_MEM_MAP_MAX) {
-		printk("Ooops! Too many entries in the memory map!\n");
+	if (boot_mem_map.nr_map == BOOT_MEM_MAP_MAX) {
+		pr_err("Ooops! Too many entries in the memory map!\n");
 		return;
 	}
 
@@ -109,28 +125,50 @@ 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;
 	const int field = 2 * sizeof(unsigned long);
 
 	for (i = 0; i < boot_mem_map.nr_map; i++) {
-		printk(" memory: %0*Lx @ %0*Lx ",
+		printk(KERN_INFO " memory: %0*Lx @ %0*Lx ",
 		       field, (unsigned long long) boot_mem_map.map[i].size,
 		       field, (unsigned long long) boot_mem_map.map[i].addr);
 
 		switch (boot_mem_map.map[i].type) {
 		case BOOT_MEM_RAM:
-			printk("(usable)\n");
+			printk(KERN_CONT "(usable)\n");
+			break;
+		case BOOT_MEM_INIT_RAM:
+			printk(KERN_CONT "(usable after init)\n");
 			break;
 		case BOOT_MEM_ROM_DATA:
-			printk("(ROM data)\n");
+			printk(KERN_CONT "(ROM data)\n");
 			break;
 		case BOOT_MEM_RESERVED:
-			printk("(reserved)\n");
+			printk(KERN_CONT "(reserved)\n");
 			break;
 		default:
-			printk("type %lu\n", boot_mem_map.map[i].type);
+			printk(KERN_CONT "type %lu\n", boot_mem_map.map[i].type);
 			break;
 		}
 	}
@@ -167,36 +205,21 @@ early_param("rd_size", rd_size_early);
 static unsigned long __init init_initrd(void)
 {
 	unsigned long end;
-	u32 *initrd_header;
 
 	/*
 	 * Board specific code or command line parser should have
 	 * already set up initrd_start and initrd_end. In these cases
 	 * perfom sanity checks and use them if all looks good.
 	 */
-	if (initrd_start && initrd_end > initrd_start)
-		goto sanitize;
-
-	/*
-	 * See if initrd has been added to the kernel image by
-	 * arch/mips/boot/addinitrd.c. In that case a header is
-	 * prepended to initrd and is made up by 8 bytes. The fisrt
-	 * word is a magic number and the second one is the size of
-	 * initrd.  Initrd start must be page aligned in any cases.
-	 */
-	initrd_header = __va(PAGE_ALIGN(__pa_symbol(&_end) + 8)) - 8;
-	if (initrd_header[0] != 0x494E5244)
+	if (!initrd_start || initrd_end <= initrd_start)
 		goto disable;
-	initrd_start = (unsigned long)(initrd_header + 2);
-	initrd_end = initrd_start + initrd_header[1];
 
-sanitize:
 	if (initrd_start & ~PAGE_MASK) {
-		printk(KERN_ERR "initrd start must be page aligned\n");
+		pr_err("initrd start must be page aligned\n");
 		goto disable;
 	}
 	if (initrd_start < PAGE_OFFSET) {
-		printk(KERN_ERR "initrd start < PAGE_OFFSET\n");
+		pr_err("initrd start < PAGE_OFFSET\n");
 		goto disable;
 	}
 
@@ -228,18 +251,18 @@ static void __init finalize_initrd(void)
 		goto disable;
 	}
 	if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
-		printk("Initrd extends beyond end of memory");
+		printk(KERN_ERR "Initrd extends beyond end of memory");
 		goto disable;
 	}
 
 	reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT);
 	initrd_below_start_ok = 1;
 
-	printk(KERN_INFO "Initial ramdisk at: 0x%lx (%lu bytes)\n",
-	       initrd_start, size);
+	pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n",
+		initrd_start, size);
 	return;
 disable:
-	printk(" - disabling initrd\n");
+	printk(KERN_CONT " - disabling initrd\n");
 	initrd_start = 0;
 	initrd_end = 0;
 }
@@ -277,11 +300,13 @@ static void __init bootmem_init(void)
 	int i;
 
 	/*
-	 * Init any data related to initrd. It's a nop if INITRD is
-	 * not selected. Once that done we can determine the low bound
-	 * of usable memory.
+	 * Sanity check any INITRD first. We don't take it into account
+	 * for bootmem setup initially, rely on the end-of-kernel-code
+	 * as our memory range starting point. Once bootmem is inited we
+	 * will reserve the area used for the initrd.
 	 */
-	reserved_end = max(init_initrd(), PFN_UP(__pa_symbol(&_end)));
+	init_initrd();
+	reserved_end = (unsigned long) PFN_UP(__pa_symbol(&_end));
 
 	/*
 	 * max_low_pfn is not a number of pages. The number of pages
@@ -317,20 +342,19 @@ static void __init bootmem_init(void)
 	if (min_low_pfn >= max_low_pfn)
 		panic("Incorrect memory mapping !!!");
 	if (min_low_pfn > ARCH_PFN_OFFSET) {
-		printk(KERN_INFO
-		       "Wasting %lu bytes for tracking %lu unused pages\n",
-		       (min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page),
-		       min_low_pfn - ARCH_PFN_OFFSET);
+		pr_info("Wasting %lu bytes for tracking %lu unused pages\n",
+			(min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page),
+			min_low_pfn - ARCH_PFN_OFFSET);
 	} else if (min_low_pfn < ARCH_PFN_OFFSET) {
-		printk(KERN_INFO
-		       "%lu free pages won't be used\n",
-		       ARCH_PFN_OFFSET - min_low_pfn);
+		pr_info("%lu free pages won't be used\n",
+			ARCH_PFN_OFFSET - min_low_pfn);
 	}
 	min_low_pfn = ARCH_PFN_OFFSET;
 
 	/*
 	 * Determine low and high memory ranges
 	 */
+	max_pfn = max_low_pfn;
 	if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) {
 #ifdef CONFIG_HIGHMEM
 		highstart_pfn = PFN_DOWN(HIGHMEM_START);
@@ -339,6 +363,14 @@ static void __init bootmem_init(void)
 		max_low_pfn = PFN_DOWN(HIGHMEM_START);
 	}
 
+#ifdef CONFIG_BLK_DEV_INITRD
+	/*
+	 * mapstart should be after initrd_end
+	 */
+	if (initrd_end)
+		mapstart = max(mapstart, (unsigned long)PFN_UP(__pa(initrd_end)));
+#endif
+
 	/*
 	 * Initialize the boot-time allocator with low memory only.
 	 */
@@ -369,7 +401,7 @@ static void __init bootmem_init(void)
 			continue;
 #endif
 
-		add_active_range(0, start, end);
+		memblock_add_node(PFN_PHYS(start), PFN_PHYS(end - start), 0);
 	}
 
 	/*
@@ -378,15 +410,24 @@ static void __init bootmem_init(void)
 	for (i = 0; i < boot_mem_map.nr_map; i++) {
 		unsigned long start, end, size;
 
+		start = PFN_UP(boot_mem_map.map[i].addr);
+		end   = PFN_DOWN(boot_mem_map.map[i].addr
+				    + boot_mem_map.map[i].size);
+
 		/*
 		 * Reserve usable memory.
 		 */
-		if (boot_mem_map.map[i].type != BOOT_MEM_RAM)
+		switch (boot_mem_map.map[i].type) {
+		case BOOT_MEM_RAM:
+			break;
+		case BOOT_MEM_INIT_RAM:
+			memory_present(0, start, end);
+			continue;
+		default:
+			/* Not usable memory */
 			continue;
+		}
 
-		start = PFN_UP(boot_mem_map.map[i].addr);
-		end   = PFN_DOWN(boot_mem_map.map[i].addr
-				    + boot_mem_map.map[i].size);
 		/*
 		 * We are rounding up the start address of usable memory
 		 * and at the end of the usable range downwards.
@@ -439,13 +480,13 @@ static void __init bootmem_init(void)
  * At this stage the bootmem allocator is ready to use.
  *
  * NOTE: historically plat_mem_setup did the entire platform initialization.
- *       This was rather impractical because it meant plat_mem_setup had to
+ *	 This was rather impractical because it meant plat_mem_setup had to
  * get away without any kind of memory allocator.  To keep old code from
  * breaking plat_setup was just renamed to plat_setup and a second platform
  * initialization hook for anything else was introduced.
  */
 
-static int usermem __initdata = 0;
+static int usermem __initdata;
 
 static int __init early_parse_mem(char *p)
 {
@@ -459,7 +500,7 @@ static int __init early_parse_mem(char *p)
 	if (usermem == 0) {
 		boot_mem_map.nr_map = 0;
 		usermem = 1;
- 	}
+	}
 	start = 0;
 	size = memparse(p, &p);
 	if (*p == '@')
@@ -470,6 +511,102 @@ 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);
+}
+
+#ifdef CONFIG_KEXEC
+static inline unsigned long long get_total_mem(void)
+{
+	unsigned long long total;
+
+	total = max_pfn - min_low_pfn;
+	return total << PAGE_SHIFT;
+}
+
+static void __init mips_parse_crashkernel(void)
+{
+	unsigned long long total_mem;
+	unsigned long long crash_size, crash_base;
+	int ret;
+
+	total_mem = get_total_mem();
+	ret = parse_crashkernel(boot_command_line, total_mem,
+				&crash_size, &crash_base);
+	if (ret != 0 || crash_size <= 0)
+		return;
+
+	crashk_res.start = crash_base;
+	crashk_res.end	 = crash_base + crash_size - 1;
+}
+
+static void __init request_crashkernel(struct resource *res)
+{
+	int ret;
+
+	ret = request_resource(res, &crashk_res);
+	if (!ret)
+		pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n",
+			(unsigned long)((crashk_res.end -
+					 crashk_res.start + 1) >> 20),
+			(unsigned long)(crashk_res.start  >> 20));
+}
+#else /* !defined(CONFIG_KEXEC)		*/
+static void __init mips_parse_crashkernel(void)
+{
+}
+
+static void __init request_crashkernel(struct resource *res)
+{
+}
+#endif /* !defined(CONFIG_KEXEC)  */
+
 static void __init arch_mem_init(char **cmdline_p)
 {
 	extern void plat_mem_setup(void);
@@ -477,23 +614,66 @@ static void __init arch_mem_init(char **cmdline_p)
 	/* call board setup routine */
 	plat_mem_setup();
 
-	printk("Determined physical RAM map:\n");
+	/*
+	 * 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();
 
-	strlcpy(command_line, arcs_cmdline, sizeof(command_line));
-	strlcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
+#ifdef CONFIG_CMDLINE_BOOL
+#ifdef CONFIG_CMDLINE_OVERRIDE
+	strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
+#else
+	if (builtin_cmdline[0]) {
+		strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE);
+		strlcat(arcs_cmdline, builtin_cmdline, COMMAND_LINE_SIZE);
+	}
+	strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
+#endif
+#else
+	strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
+#endif
+	strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
 
 	*cmdline_p = command_line;
 
 	parse_early_param();
 
 	if (usermem) {
-		printk("User-defined physical RAM map:\n");
+		pr_info("User-defined physical RAM map:\n");
 		print_memory_map();
 	}
 
 	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
+
+	mips_parse_crashkernel();
+#ifdef CONFIG_KEXEC
+	if (crashk_res.start != crashk_res.end)
+		reserve_bootmem(crashk_res.start,
+				crashk_res.end - crashk_res.start + 1,
+				BOOTMEM_DEFAULT);
+#endif
+	device_tree_init();
 	sparse_init();
+	plat_swiotlb_setup();
 	paging_init();
 }
 
@@ -509,9 +689,6 @@ static void __init resource_init(void)
 	data_resource.start = __pa_symbol(&_etext);
 	data_resource.end = __pa_symbol(&_edata) - 1;
 
-	/*
-	 * Request address space for all standard RAM.
-	 */
 	for (i = 0; i < boot_mem_map.nr_map; i++) {
 		struct resource *res;
 		unsigned long start, end;
@@ -526,6 +703,7 @@ static void __init resource_init(void)
 		res = alloc_bootmem(sizeof(struct resource));
 		switch (boot_mem_map.map[i].type) {
 		case BOOT_MEM_RAM:
+		case BOOT_MEM_INIT_RAM:
 		case BOOT_MEM_ROM_DATA:
 			res->name = "System RAM";
 			break;
@@ -547,6 +725,7 @@ static void __init resource_init(void)
 		 */
 		request_resource(res, &code_resource);
 		request_resource(res, &data_resource);
+		request_crashkernel(res);
 	}
 }
 
@@ -556,11 +735,7 @@ void __init setup_arch(char **cmdline_p)
 	prom_init();
 
 #ifdef CONFIG_EARLY_PRINTK
-	{
-		extern void setup_early_printk(void);
-
-		setup_early_printk();
-	}
+	setup_early_printk();
 #endif
 	cpu_report();
 	check_bugs_early();
@@ -577,29 +752,10 @@ void __init setup_arch(char **cmdline_p)
 
 	resource_init();
 	plat_smp_setup();
-}
-
-static int __init fpu_disable(char *s)
-{
-	int i;
 
-	for (i = 0; i < NR_CPUS; i++)
-		cpu_data[i].options &= ~MIPS_CPU_FPU;
-
-	return 1;
+	cpu_cache_init();
 }
 
-__setup("nofpu", fpu_disable);
-
-static int __init dsp_disable(char *s)
-{
-	cpu_data[0].ases &= ~MIPS_ASE_DSP;
-
-	return 1;
-}
-
-__setup("nodsp", dsp_disable);
-
 unsigned long kernelsp[NR_CPUS];
 unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
 
@@ -610,8 +766,8 @@ static int __init debugfs_mips(void)
 	struct dentry *d;
 
 	d = debugfs_create_dir("mips", NULL);
-	if (IS_ERR(d))
-		return PTR_ERR(d);
+	if (!d)
+		return -ENOMEM;
 	mips_debugfs_dir = d;
 	return 0;
 }