* 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 Maciej W. Rozycki
+ * Copyright (C) 2000, 2001, 2002, 2007 Maciej W. Rozycki
*/
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/highmem.h>
#include <linux/console.h>
#include <linux/pfn.h>
+#include <linux/debugfs.h>
#include <asm/addrspace.h>
#include <asm/bootinfo.h>
+#include <asm/bugs.h>
#include <asm/cache.h>
#include <asm/cpu.h>
#include <asm/sections.h>
#include <asm/setup.h>
+#include <asm/smp-ops.h>
#include <asm/system.h>
struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly;
* These are initialized so they are in the .data section
*/
unsigned long mips_machtype __read_mostly = MACH_UNKNOWN;
-unsigned long mips_machgroup __read_mostly = MACH_GROUP_UNKNOWN;
EXPORT_SYMBOL(mips_machtype);
-EXPORT_SYMBOL(mips_machgroup);
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
const unsigned long mips_io_port_base __read_mostly = -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", };
/* 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;
}
}
if (x == BOOT_MEM_MAP_MAX) {
- printk("Ooops! Too many entries in the memory map!\n");
+ pr_err("Ooops! Too many entries in the memory map!\n");
return;
}
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_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;
}
}
unsigned long start = memparse(p, &p);
#ifdef CONFIG_64BIT
- /* HACK: Guess if the sign extension was forgotten */
- if (start > 0x0000000080000000 && start < 0x00000000ffffffff)
- start |= 0xffffffff00000000UL;
+ /* Guess if the sign extension was forgotten by bootloader */
+ if (start < XKPHYS)
+ start = (int)start;
#endif
initrd_start = start;
initrd_end += start;
-
return 0;
}
early_param("rd_start", rd_start_early);
static int __init rd_size_early(char *p)
{
initrd_end += memparse(p, &p);
-
return 0;
}
early_param("rd_size", rd_size_early);
+/* it returns the next free pfn after initrd */
static unsigned long __init init_initrd(void)
{
- unsigned long tmp, end, size;
- u32 *initrd_header;
-
- ROOT_DEV = Root_RAM0;
+ unsigned long end;
/*
* 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.
*/
- size = initrd_end - initrd_start;
- if (initrd_end == 0 || size == 0) {
- initrd_start = 0;
- initrd_end = 0;
- } else
- return initrd_end;
-
- end = (unsigned long)&_end;
- tmp = PAGE_ALIGN(end) - sizeof(u32) * 2;
- if (tmp < end)
- tmp += PAGE_SIZE;
-
- initrd_header = (u32 *)tmp;
- if (initrd_header[0] == 0x494E5244) {
- initrd_start = (unsigned long)&initrd_header[2];
- initrd_end = initrd_start + initrd_header[1];
+ if (!initrd_start || initrd_end <= initrd_start)
+ goto disable;
+
+ if (initrd_start & ~PAGE_MASK) {
+ pr_err("initrd start must be page aligned\n");
+ goto disable;
+ }
+ if (initrd_start < PAGE_OFFSET) {
+ pr_err("initrd start < PAGE_OFFSET\n");
+ goto disable;
}
- return initrd_end;
+
+ /*
+ * Sanitize initrd addresses. For example firmware
+ * can't guess if they need to pass them through
+ * 64-bits values if the kernel has been built in pure
+ * 32-bit. We need also to switch from KSEG0 to XKPHYS
+ * addresses now, so the code can now safely use __pa().
+ */
+ end = __pa(initrd_end);
+ initrd_end = (unsigned long)__va(end);
+ initrd_start = (unsigned long)__va(__pa(initrd_start));
+
+ ROOT_DEV = Root_RAM0;
+ return PFN_UP(end);
+disable:
+ initrd_start = 0;
+ initrd_end = 0;
+ return 0;
}
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);
+ 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;
}
static void __init bootmem_init(void)
{
unsigned long reserved_end;
- unsigned long highest = 0;
- unsigned long mapstart = -1UL;
+ unsigned long mapstart = ~0UL;
unsigned long bootmap_size;
int i;
* not selected. Once that done we can determine the low bound
* of usable memory.
*/
- reserved_end = init_initrd();
- reserved_end = PFN_UP(max(__pa(reserved_end), __pa_symbol(&_end)));
+ reserved_end = max(init_initrd(),
+ (unsigned long) PFN_UP(__pa_symbol(&_end)));
+
+ /*
+ * max_low_pfn is not a number of pages. The number of pages
+ * of the system is given by 'max_low_pfn - min_low_pfn'.
+ */
+ min_low_pfn = ~0UL;
+ max_low_pfn = 0;
/*
* Find the highest page frame number we have available.
end = PFN_DOWN(boot_mem_map.map[i].addr
+ boot_mem_map.map[i].size);
- if (end > highest)
- highest = end;
+ if (end > max_low_pfn)
+ max_low_pfn = end;
+ if (start < min_low_pfn)
+ min_low_pfn = start;
if (end <= reserved_end)
continue;
if (start >= mapstart)
mapstart = max(reserved_end, start);
}
+ if (min_low_pfn >= max_low_pfn)
+ panic("Incorrect memory mapping !!!");
+ if (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) {
+ 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
*/
- if (highest > PFN_DOWN(HIGHMEM_START)) {
+ max_pfn = max_low_pfn;
+ if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) {
#ifdef CONFIG_HIGHMEM
highstart_pfn = PFN_DOWN(HIGHMEM_START);
- highend_pfn = highest;
+ highend_pfn = max_low_pfn;
#endif
- highest = PFN_DOWN(HIGHMEM_START);
+ max_low_pfn = PFN_DOWN(HIGHMEM_START);
}
/*
* Initialize the boot-time allocator with low memory only.
*/
- bootmap_size = init_bootmem(mapstart, highest);
+ bootmap_size = init_bootmem_node(NODE_DATA(0), mapstart,
+ min_low_pfn, max_low_pfn);
+
+
+ for (i = 0; i < boot_mem_map.nr_map; i++) {
+ unsigned long start, end;
+
+ start = PFN_UP(boot_mem_map.map[i].addr);
+ end = PFN_DOWN(boot_mem_map.map[i].addr
+ + boot_mem_map.map[i].size);
+
+ if (start <= min_low_pfn)
+ start = min_low_pfn;
+ if (start >= end)
+ continue;
+
+#ifndef CONFIG_HIGHMEM
+ if (end > max_low_pfn)
+ end = max_low_pfn;
+
+ /*
+ * ... finally, is the area going away?
+ */
+ if (end <= start)
+ continue;
+#endif
+
+ add_active_range(0, start, end);
+ }
/*
* Register fully available low RAM pages with the bootmem allocator.
/*
* Reserve the bootmap memory.
*/
- reserve_bootmem(PFN_PHYS(mapstart), bootmap_size);
+ reserve_bootmem(PFN_PHYS(mapstart), bootmap_size, BOOTMEM_DEFAULT);
/*
* Reserve initrd memory if needed.
#endif /* CONFIG_SGI_IP27 */
/*
- * arch_mem_init - initialize memory managment subsystem
+ * arch_mem_init - initialize memory management subsystem
*
* o plat_mem_setup() detects the memory configuration and will record detected
* memory areas using add_memory_region.
*
* At this stage the memory configuration of the system is known to the
- * kernel but generic memory managment system is still entirely uninitialized.
+ * kernel but generic memory management system is still entirely uninitialized.
*
* o bootmem_init()
* o sparse_init()
* initialization hook for anything else was introduced.
*/
-static int usermem __initdata = 0;
+static int usermem __initdata;
static int __init early_parse_mem(char *p)
{
/* call board setup routine */
plat_mem_setup();
- printk("Determined physical RAM map:\n");
+ pr_info("Determined physical RAM map:\n");
print_memory_map();
- strlcpy(command_line, arcs_cmdline, sizeof(command_line));
- strlcpy(saved_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();
}
{
cpu_probe();
prom_init();
+
+#ifdef CONFIG_EARLY_PRINTK
+ setup_early_printk();
+#endif
cpu_report();
+ check_bugs_early();
#if defined(CONFIG_VT)
#if defined(CONFIG_VGA_CONSOLE)
- conswitchp = &vga_con;
+ conswitchp = &vga_con;
#elif defined(CONFIG_DUMMY_CONSOLE)
- conswitchp = &dummy_con;
+ conswitchp = &dummy_con;
#endif
#endif
arch_mem_init(cmdline_p);
resource_init();
-#ifdef CONFIG_SMP
plat_smp_setup();
-#endif
-}
-
-int __init fpu_disable(char *s)
-{
- int i;
-
- for (i = 0; i < NR_CPUS; i++)
- cpu_data[i].options &= ~MIPS_CPU_FPU;
-
- return 1;
}
-__setup("nofpu", fpu_disable);
+unsigned long kernelsp[NR_CPUS];
+unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
-int __init dsp_disable(char *s)
+#ifdef CONFIG_DEBUG_FS
+struct dentry *mips_debugfs_dir;
+static int __init debugfs_mips(void)
{
- cpu_data[0].ases &= ~MIPS_ASE_DSP;
+ struct dentry *d;
- return 1;
+ d = debugfs_create_dir("mips", NULL);
+ if (!d)
+ return -ENOMEM;
+ mips_debugfs_dir = d;
+ return 0;
}
-
-__setup("nodsp", dsp_disable);
+arch_initcall(debugfs_mips);
+#endif
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff