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Diffstat (limited to 'arch/arm/kernel/setup.c')
-rw-r--r--arch/arm/kernel/setup.c73
1 files changed, 39 insertions, 34 deletions
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index db238285345..d1da9217427 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -325,28 +325,6 @@ static void __init early_print(const char *str, ...)
printk("%s", buf);
}
-static struct machine_desc * __init lookup_machine_type(unsigned int type)
-{
- extern struct machine_desc __arch_info_begin[], __arch_info_end[];
- struct machine_desc *p;
-
- for (p = __arch_info_begin; p < __arch_info_end; p++)
- if (type == p->nr)
- return p;
-
- early_print("\n"
- "Error: unrecognized/unsupported machine ID (r1 = 0x%08x).\n\n"
- "Available machine support:\n\nID (hex)\tNAME\n", type);
-
- for (p = __arch_info_begin; p < __arch_info_end; p++)
- early_print("%08x\t%s\n", p->nr, p->name);
-
- early_print("\nPlease check your kernel config and/or bootloader.\n");
-
- while (true)
- /* can't use cpu_relax() here as it may require MMU setup */;
-}
-
static void __init feat_v6_fixup(void)
{
int id = read_cpuid_id();
@@ -463,21 +441,29 @@ void cpu_init(void)
static struct machine_desc * __init setup_machine(unsigned int nr)
{
- struct machine_desc *list;
+ extern struct machine_desc __arch_info_begin[], __arch_info_end[];
+ struct machine_desc *p;
/*
* locate machine in the list of supported machines.
*/
- list = lookup_machine_type(nr);
- if (!list) {
- printk("Machine configuration botched (nr %d), unable "
- "to continue.\n", nr);
- while (1);
- }
+ for (p = __arch_info_begin; p < __arch_info_end; p++)
+ if (nr == p->nr) {
+ printk("Machine: %s\n", p->name);
+ return p;
+ }
- printk("Machine: %s\n", list->name);
+ early_print("\n"
+ "Error: unrecognized/unsupported machine ID (r1 = 0x%08x).\n\n"
+ "Available machine support:\n\nID (hex)\tNAME\n", nr);
- return list;
+ for (p = __arch_info_begin; p < __arch_info_end; p++)
+ early_print("%08x\t%s\n", p->nr, p->name);
+
+ early_print("\nPlease check your kernel config and/or bootloader.\n");
+
+ while (true)
+ /* can't use cpu_relax() here as it may require MMU setup */;
}
static int __init arm_add_memory(unsigned long start, unsigned long size)
@@ -740,7 +726,7 @@ static struct init_tags {
{ tag_size(tag_core), ATAG_CORE },
{ 1, PAGE_SIZE, 0xff },
{ tag_size(tag_mem32), ATAG_MEM },
- { MEM_SIZE, PHYS_OFFSET },
+ { MEM_SIZE },
{ 0, ATAG_NONE }
};
@@ -839,6 +825,8 @@ void __init setup_arch(char **cmdline_p)
struct machine_desc *mdesc;
char *from = default_command_line;
+ init_tags.mem.start = PHYS_OFFSET;
+
unwind_init();
setup_processor();
@@ -851,8 +839,25 @@ void __init setup_arch(char **cmdline_p)
if (__atags_pointer)
tags = phys_to_virt(__atags_pointer);
- else if (mdesc->boot_params)
- tags = phys_to_virt(mdesc->boot_params);
+ else if (mdesc->boot_params) {
+#ifdef CONFIG_MMU
+ /*
+ * We still are executing with a minimal MMU mapping created
+ * with the presumption that the machine default for this
+ * is located in the first MB of RAM. Anything else will
+ * fault and silently hang the kernel at this point.
+ */
+ if (mdesc->boot_params < PHYS_OFFSET ||
+ mdesc->boot_params >= PHYS_OFFSET + SZ_1M) {
+ printk(KERN_WARNING
+ "Default boot params at physical 0x%08lx out of reach\n",
+ mdesc->boot_params);
+ } else
+#endif
+ {
+ tags = phys_to_virt(mdesc->boot_params);
+ }
+ }
#if defined(CONFIG_DEPRECATED_PARAM_STRUCT)
/*