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authorRussell King <rmk+kernel@arm.linux.org.uk>2011-05-25 00:08:17 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-05-25 00:08:17 +0100
commit03eb14199e8a2ff2bc170b283305990151b0d619 (patch)
treec16c123a850e8033b2daa71ad9ae241906542dd8 /arch
parentd762f4383100c2a87b1a3f2d678cd3b5425655b4 (diff)
parentede338f4ce2fb5ee99d18751df32fbd3b10df268 (diff)
downloadop-kernel-dev-03eb14199e8a2ff2bc170b283305990151b0d619.zip
op-kernel-dev-03eb14199e8a2ff2bc170b283305990151b0d619.tar.gz
Merge branch 'devicetree/arm-next' of git://git.secretlab.ca/git/linux-2.6 into devel-stable
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/Kconfig7
-rw-r--r--arch/arm/include/asm/mach/arch.h9
-rw-r--r--arch/arm/include/asm/prom.h37
-rw-r--r--arch/arm/include/asm/setup.h4
-rw-r--r--arch/arm/kernel/Makefile1
-rw-r--r--arch/arm/kernel/devtree.c145
-rw-r--r--arch/arm/kernel/head-common.S24
-rw-r--r--arch/arm/kernel/head.S8
-rw-r--r--arch/arm/kernel/setup.c90
-rw-r--r--arch/arm/mm/init.c11
-rw-r--r--arch/microblaze/kernel/prom.c2
-rw-r--r--arch/mips/include/asm/prom.h3
-rw-r--r--arch/mips/kernel/prom.c3
-rw-r--r--arch/powerpc/kernel/prom.c2
14 files changed, 298 insertions, 48 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 7275009..3bc1a58 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1683,6 +1683,13 @@ endmenu
menu "Boot options"
+config USE_OF
+ bool "Flattened Device Tree support"
+ select OF
+ select OF_EARLY_FLATTREE
+ help
+ Include support for flattened device tree machine descriptions.
+
# Compressed boot loader in ROM. Yes, we really want to ask about
# TEXT and BSS so we preserve their values in the config files.
config ZBOOT_ROM_TEXT
diff --git a/arch/arm/include/asm/mach/arch.h b/arch/arm/include/asm/mach/arch.h
index bf13b81..946f4d7 100644
--- a/arch/arm/include/asm/mach/arch.h
+++ b/arch/arm/include/asm/mach/arch.h
@@ -18,6 +18,8 @@ struct machine_desc {
unsigned int nr; /* architecture number */
const char *name; /* architecture name */
unsigned long boot_params; /* tagged list */
+ const char **dt_compat; /* array of device tree
+ * 'compatible' strings */
unsigned int nr_irqs; /* number of IRQs */
@@ -48,6 +50,13 @@ struct machine_desc {
extern struct machine_desc *machine_desc;
/*
+ * Machine type table - also only accessible during boot
+ */
+extern struct machine_desc __arch_info_begin[], __arch_info_end[];
+#define for_each_machine_desc(p) \
+ for (p = __arch_info_begin; p < __arch_info_end; p++)
+
+/*
* Set of macros to define architecture features. This is built into
* a table by the linker.
*/
diff --git a/arch/arm/include/asm/prom.h b/arch/arm/include/asm/prom.h
new file mode 100644
index 0000000..11b8708
--- /dev/null
+++ b/arch/arm/include/asm/prom.h
@@ -0,0 +1,37 @@
+/*
+ * arch/arm/include/asm/prom.h
+ *
+ * Copyright (C) 2009 Canonical Ltd. <jeremy.kerr@canonical.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#ifndef __ASMARM_PROM_H
+#define __ASMARM_PROM_H
+
+#ifdef CONFIG_OF
+
+#include <asm/setup.h>
+#include <asm/irq.h>
+
+static inline void irq_dispose_mapping(unsigned int virq)
+{
+ return;
+}
+
+extern struct machine_desc *setup_machine_fdt(unsigned int dt_phys);
+extern void arm_dt_memblock_reserve(void);
+
+#else /* CONFIG_OF */
+
+static inline struct machine_desc *setup_machine_fdt(unsigned int dt_phys)
+{
+ return NULL;
+}
+
+static inline void arm_dt_memblock_reserve(void) { }
+
+#endif /* CONFIG_OF */
+#endif /* ASMARM_PROM_H */
diff --git a/arch/arm/include/asm/setup.h b/arch/arm/include/asm/setup.h
index 95176af..ee2ad8a 100644
--- a/arch/arm/include/asm/setup.h
+++ b/arch/arm/include/asm/setup.h
@@ -217,6 +217,10 @@ extern struct meminfo meminfo;
#define bank_phys_end(bank) ((bank)->start + (bank)->size)
#define bank_phys_size(bank) (bank)->size
+extern int arm_add_memory(phys_addr_t start, unsigned long size);
+extern void early_print(const char *str, ...);
+extern void dump_machine_table(void);
+
#endif /* __KERNEL__ */
#endif
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 8d95446..908c78c 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -44,6 +44,7 @@ obj-$(CONFIG_ARM_THUMBEE) += thumbee.o
obj-$(CONFIG_KGDB) += kgdb.o
obj-$(CONFIG_ARM_UNWIND) += unwind.o
obj-$(CONFIG_HAVE_TCM) += tcm.o
+obj-$(CONFIG_OF) += devtree.o
obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
obj-$(CONFIG_SWP_EMULATE) += swp_emulate.o
CFLAGS_swp_emulate.o := -Wa,-march=armv7-a
diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c
new file mode 100644
index 0000000..a701e42
--- /dev/null
+++ b/arch/arm/kernel/devtree.c
@@ -0,0 +1,145 @@
+/*
+ * linux/arch/arm/kernel/devtree.c
+ *
+ * Copyright (C) 2009 Canonical Ltd. <jeremy.kerr@canonical.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/bootmem.h>
+#include <linux/memblock.h>
+#include <linux/of.h>
+#include <linux/of_fdt.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+
+#include <asm/setup.h>
+#include <asm/page.h>
+#include <asm/mach/arch.h>
+#include <asm/mach-types.h>
+
+void __init early_init_dt_add_memory_arch(u64 base, u64 size)
+{
+ arm_add_memory(base, size);
+}
+
+void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
+{
+ return alloc_bootmem_align(size, align);
+}
+
+void __init arm_dt_memblock_reserve(void)
+{
+ u64 *reserve_map, base, size;
+
+ if (!initial_boot_params)
+ return;
+
+ /* Reserve the dtb region */
+ memblock_reserve(virt_to_phys(initial_boot_params),
+ be32_to_cpu(initial_boot_params->totalsize));
+
+ /*
+ * Process the reserve map. This will probably overlap the initrd
+ * and dtb locations which are already reserved, but overlaping
+ * doesn't hurt anything
+ */
+ reserve_map = ((void*)initial_boot_params) +
+ be32_to_cpu(initial_boot_params->off_mem_rsvmap);
+ while (1) {
+ base = be64_to_cpup(reserve_map++);
+ size = be64_to_cpup(reserve_map++);
+ if (!size)
+ break;
+ memblock_reserve(base, size);
+ }
+}
+
+/**
+ * setup_machine_fdt - Machine setup when an dtb was passed to the kernel
+ * @dt_phys: physical address of dt blob
+ *
+ * If a dtb was passed to the kernel in r2, then use it to choose the
+ * correct machine_desc and to setup the system.
+ */
+struct machine_desc * __init setup_machine_fdt(unsigned int dt_phys)
+{
+ struct boot_param_header *devtree;
+ struct machine_desc *mdesc, *mdesc_best = NULL;
+ unsigned int score, mdesc_score = ~1;
+ unsigned long dt_root;
+ const char *model;
+
+ devtree = phys_to_virt(dt_phys);
+
+ /* check device tree validity */
+ if (be32_to_cpu(devtree->magic) != OF_DT_HEADER)
+ return NULL;
+
+ /* Search the mdescs for the 'best' compatible value match */
+ initial_boot_params = devtree;
+ dt_root = of_get_flat_dt_root();
+ for_each_machine_desc(mdesc) {
+ score = of_flat_dt_match(dt_root, mdesc->dt_compat);
+ if (score > 0 && score < mdesc_score) {
+ mdesc_best = mdesc;
+ mdesc_score = score;
+ }
+ }
+ if (!mdesc_best) {
+ const char *prop;
+ long size;
+
+ early_print("\nError: unrecognized/unsupported "
+ "device tree compatible list:\n[ ");
+
+ prop = of_get_flat_dt_prop(dt_root, "compatible", &size);
+ while (size > 0) {
+ early_print("'%s' ", prop);
+ size -= strlen(prop) + 1;
+ prop += strlen(prop) + 1;
+ }
+ early_print("]\n\n");
+
+ dump_machine_table(); /* does not return */
+ }
+
+ model = of_get_flat_dt_prop(dt_root, "model", NULL);
+ if (!model)
+ model = of_get_flat_dt_prop(dt_root, "compatible", NULL);
+ if (!model)
+ model = "<unknown>";
+ pr_info("Machine: %s, model: %s\n", mdesc_best->name, model);
+
+ /* Retrieve various information from the /chosen node */
+ of_scan_flat_dt(early_init_dt_scan_chosen, boot_command_line);
+ /* Initialize {size,address}-cells info */
+ of_scan_flat_dt(early_init_dt_scan_root, NULL);
+ /* Setup memory, calling early_init_dt_add_memory_arch */
+ of_scan_flat_dt(early_init_dt_scan_memory, NULL);
+
+ /* Change machine number to match the mdesc we're using */
+ __machine_arch_type = mdesc_best->nr;
+
+ return mdesc_best;
+}
+
+/**
+ * irq_create_of_mapping - Hook to resolve OF irq specifier into a Linux irq#
+ *
+ * Currently the mapping mechanism is trivial; simple flat hwirq numbers are
+ * mapped 1:1 onto Linux irq numbers. Cascaded irq controllers are not
+ * supported.
+ */
+unsigned int irq_create_of_mapping(struct device_node *controller,
+ const u32 *intspec, unsigned int intsize)
+{
+ return intspec[0];
+}
+EXPORT_SYMBOL_GPL(irq_create_of_mapping);
diff --git a/arch/arm/kernel/head-common.S b/arch/arm/kernel/head-common.S
index c84b57d..854bd22 100644
--- a/arch/arm/kernel/head-common.S
+++ b/arch/arm/kernel/head-common.S
@@ -15,6 +15,12 @@
#define ATAG_CORE_SIZE ((2*4 + 3*4) >> 2)
#define ATAG_CORE_SIZE_EMPTY ((2*4) >> 2)
+#ifdef CONFIG_CPU_BIG_ENDIAN
+#define OF_DT_MAGIC 0xd00dfeed
+#else
+#define OF_DT_MAGIC 0xedfe0dd0 /* 0xd00dfeed in big-endian */
+#endif
+
/*
* Exception handling. Something went wrong and we can't proceed. We
* ought to tell the user, but since we don't have any guarantee that
@@ -28,20 +34,26 @@
/* Determine validity of the r2 atags pointer. The heuristic requires
* that the pointer be aligned, in the first 16k of physical RAM and
- * that the ATAG_CORE marker is first and present. Future revisions
+ * that the ATAG_CORE marker is first and present. If CONFIG_OF_FLATTREE
+ * is selected, then it will also accept a dtb pointer. Future revisions
* of this function may be more lenient with the physical address and
* may also be able to move the ATAGS block if necessary.
*
* Returns:
- * r2 either valid atags pointer, or zero
+ * r2 either valid atags pointer, valid dtb pointer, or zero
* r5, r6 corrupted
*/
__vet_atags:
tst r2, #0x3 @ aligned?
bne 1f
- ldr r5, [r2, #0] @ is first tag ATAG_CORE?
- cmp r5, #ATAG_CORE_SIZE
+ ldr r5, [r2, #0]
+#ifdef CONFIG_OF_FLATTREE
+ ldr r6, =OF_DT_MAGIC @ is it a DTB?
+ cmp r5, r6
+ beq 2f
+#endif
+ cmp r5, #ATAG_CORE_SIZE @ is first tag ATAG_CORE?
cmpne r5, #ATAG_CORE_SIZE_EMPTY
bne 1f
ldr r5, [r2, #4]
@@ -49,7 +61,7 @@ __vet_atags:
cmp r5, r6
bne 1f
- mov pc, lr @ atag pointer is ok
+2: mov pc, lr @ atag/dtb pointer is ok
1: mov r2, #0
mov pc, lr
@@ -61,7 +73,7 @@ ENDPROC(__vet_atags)
*
* r0 = cp#15 control register
* r1 = machine ID
- * r2 = atags pointer
+ * r2 = atags/dtb pointer
* r9 = processor ID
*/
__INIT
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index c9173cf..a5e5c5b 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -59,7 +59,7 @@
*
* This is normally called from the decompressor code. The requirements
* are: MMU = off, D-cache = off, I-cache = dont care, r0 = 0,
- * r1 = machine nr, r2 = atags pointer.
+ * r1 = machine nr, r2 = atags or dtb pointer.
*
* This code is mostly position independent, so if you link the kernel at
* 0xc0008000, you call this at __pa(0xc0008000).
@@ -91,7 +91,7 @@ ENTRY(stext)
#endif
/*
- * r1 = machine no, r2 = atags,
+ * r1 = machine no, r2 = atags or dtb,
* r8 = phys_offset, r9 = cpuid, r10 = procinfo
*/
bl __vet_atags
@@ -339,7 +339,7 @@ __secondary_data:
*
* r0 = cp#15 control register
* r1 = machine ID
- * r2 = atags pointer
+ * r2 = atags or dtb pointer
* r4 = page table pointer
* r9 = processor ID
* r13 = *virtual* address to jump to upon completion
@@ -376,7 +376,7 @@ ENDPROC(__enable_mmu)
*
* r0 = cp#15 control register
* r1 = machine ID
- * r2 = atags pointer
+ * r2 = atags or dtb pointer
* r9 = processor ID
* r13 = *virtual* address to jump to upon completion
*
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 6dce209..ed11fb0 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -20,6 +20,7 @@
#include <linux/screen_info.h>
#include <linux/init.h>
#include <linux/kexec.h>
+#include <linux/of_fdt.h>
#include <linux/crash_dump.h>
#include <linux/root_dev.h>
#include <linux/cpu.h>
@@ -42,6 +43,7 @@
#include <asm/cachetype.h>
#include <asm/tlbflush.h>
+#include <asm/prom.h>
#include <asm/mach/arch.h>
#include <asm/mach/irq.h>
#include <asm/mach/time.h>
@@ -309,7 +311,7 @@ static void __init cacheid_init(void)
*/
extern struct proc_info_list *lookup_processor_type(unsigned int);
-static void __init early_print(const char *str, ...)
+void __init early_print(const char *str, ...)
{
extern void printascii(const char *);
char buf[256];
@@ -439,25 +441,12 @@ void cpu_init(void)
: "r14");
}
-static struct machine_desc * __init setup_machine(unsigned int nr)
+void __init dump_machine_table(void)
{
- extern struct machine_desc __arch_info_begin[], __arch_info_end[];
struct machine_desc *p;
- /*
- * locate machine in the list of supported machines.
- */
- for (p = __arch_info_begin; p < __arch_info_end; p++)
- if (nr == p->nr) {
- printk("Machine: %s\n", p->name);
- return p;
- }
-
- early_print("\n"
- "Error: unrecognized/unsupported machine ID (r1 = 0x%08x).\n\n"
- "Available machine support:\n\nID (hex)\tNAME\n", nr);
-
- for (p = __arch_info_begin; p < __arch_info_end; p++)
+ early_print("Available machine support:\n\nID (hex)\tNAME\n");
+ for_each_machine_desc(p)
early_print("%08x\t%s\n", p->nr, p->name);
early_print("\nPlease check your kernel config and/or bootloader.\n");
@@ -466,7 +455,7 @@ static struct machine_desc * __init setup_machine(unsigned int nr)
/* can't use cpu_relax() here as it may require MMU setup */;
}
-static int __init arm_add_memory(phys_addr_t start, unsigned long size)
+int __init arm_add_memory(phys_addr_t start, unsigned long size)
{
struct membank *bank = &meminfo.bank[meminfo.nr_banks];
@@ -801,23 +790,29 @@ static void __init squash_mem_tags(struct tag *tag)
tag->hdr.tag = ATAG_NONE;
}
-void __init setup_arch(char **cmdline_p)
+static struct machine_desc * __init setup_machine_tags(unsigned int nr)
{
struct tag *tags = (struct tag *)&init_tags;
- struct machine_desc *mdesc;
+ struct machine_desc *mdesc = NULL, *p;
char *from = default_command_line;
init_tags.mem.start = PHYS_OFFSET;
- unwind_init();
-
- setup_processor();
- mdesc = setup_machine(machine_arch_type);
- machine_desc = mdesc;
- machine_name = mdesc->name;
+ /*
+ * locate machine in the list of supported machines.
+ */
+ for_each_machine_desc(p)
+ if (nr == p->nr) {
+ printk("Machine: %s\n", p->name);
+ mdesc = p;
+ break;
+ }
- if (mdesc->soft_reboot)
- reboot_setup("s");
+ if (!mdesc) {
+ early_print("\nError: unrecognized/unsupported machine ID"
+ " (r1 = 0x%08x).\n\n", nr);
+ dump_machine_table(); /* does not return */
+ }
if (__atags_pointer)
tags = phys_to_virt(__atags_pointer);
@@ -849,8 +844,17 @@ void __init setup_arch(char **cmdline_p)
if (tags->hdr.tag != ATAG_CORE)
convert_to_tag_list(tags);
#endif
- if (tags->hdr.tag != ATAG_CORE)
+
+ if (tags->hdr.tag != ATAG_CORE) {
+#if defined(CONFIG_OF)
+ /*
+ * If CONFIG_OF is set, then assume this is a reasonably
+ * modern system that should pass boot parameters
+ */
+ early_print("Warning: Neither atags nor dtb found\n");
+#endif
tags = (struct tag *)&init_tags;
+ }
if (mdesc->fixup)
mdesc->fixup(mdesc, tags, &from, &meminfo);
@@ -862,14 +866,34 @@ void __init setup_arch(char **cmdline_p)
parse_tags(tags);
}
+ /* parse_early_param needs a boot_command_line */
+ strlcpy(boot_command_line, from, COMMAND_LINE_SIZE);
+
+ return mdesc;
+}
+
+
+void __init setup_arch(char **cmdline_p)
+{
+ struct machine_desc *mdesc;
+
+ unwind_init();
+
+ setup_processor();
+ mdesc = setup_machine_fdt(__atags_pointer);
+ if (!mdesc)
+ mdesc = setup_machine_tags(machine_arch_type);
+ machine_desc = mdesc;
+ machine_name = mdesc->name;
+
+ if (mdesc->soft_reboot)
+ reboot_setup("s");
+
init_mm.start_code = (unsigned long) _text;
init_mm.end_code = (unsigned long) _etext;
init_mm.end_data = (unsigned long) _edata;
init_mm.brk = (unsigned long) _end;
- /* parse_early_param needs a boot_command_line */
- strlcpy(boot_command_line, from, COMMAND_LINE_SIZE);
-
/* populate cmd_line too for later use, preserving boot_command_line */
strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE);
*cmdline_p = cmd_line;
@@ -881,6 +905,8 @@ void __init setup_arch(char **cmdline_p)
paging_init(mdesc);
request_standard_resources(mdesc);
+ unflatten_device_tree();
+
#ifdef CONFIG_SMP
if (is_smp())
smp_init_cpus();
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 76f82ae..7517672 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -15,12 +15,14 @@
#include <linux/mman.h>
#include <linux/nodemask.h>
#include <linux/initrd.h>
+#include <linux/of_fdt.h>
#include <linux/highmem.h>
#include <linux/gfp.h>
#include <linux/memblock.h>
#include <linux/sort.h>
#include <asm/mach-types.h>
+#include <asm/prom.h>
#include <asm/sections.h>
#include <asm/setup.h>
#include <asm/sizes.h>
@@ -71,6 +73,14 @@ static int __init parse_tag_initrd2(const struct tag *tag)
__tagtable(ATAG_INITRD2, parse_tag_initrd2);
+#ifdef CONFIG_OF_FLATTREE
+void __init early_init_dt_setup_initrd_arch(unsigned long start, unsigned long end)
+{
+ phys_initrd_start = start;
+ phys_initrd_size = end - start;
+}
+#endif /* CONFIG_OF_FLATTREE */
+
/*
* This keeps memory configuration data used by a couple memory
* initialization functions, as well as show_mem() for the skipping
@@ -334,6 +344,7 @@ void __init arm_memblock_init(struct meminfo *mi, struct machine_desc *mdesc)
#endif
arm_mm_memblock_reserve();
+ arm_dt_memblock_reserve();
/* reserve any platform specific memblock areas */
if (mdesc->reserve)
diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c
index 00ee90f..b15cc21 100644
--- a/arch/microblaze/kernel/prom.c
+++ b/arch/microblaze/kernel/prom.c
@@ -130,7 +130,7 @@ void __init early_init_devtree(void *params)
* device-tree, including the platform type, initrd location and
* size, TCE reserve, and more ...
*/
- of_scan_flat_dt(early_init_dt_scan_chosen, NULL);
+ of_scan_flat_dt(early_init_dt_scan_chosen, cmd_line);
/* Scan memory nodes and rebuild MEMBLOCKs */
memblock_init();
diff --git a/arch/mips/include/asm/prom.h b/arch/mips/include/asm/prom.h
index f29b862..857d9b7 100644
--- a/arch/mips/include/asm/prom.h
+++ b/arch/mips/include/asm/prom.h
@@ -14,9 +14,6 @@
#ifdef CONFIG_OF
#include <asm/bootinfo.h>
-/* which is compatible with the flattened device tree (FDT) */
-#define cmd_line arcs_cmdline
-
extern int early_init_dt_scan_memory_arch(unsigned long node,
const char *uname, int depth, void *data);
diff --git a/arch/mips/kernel/prom.c b/arch/mips/kernel/prom.c
index a19811e9..5b7eade4 100644
--- a/arch/mips/kernel/prom.c
+++ b/arch/mips/kernel/prom.c
@@ -83,7 +83,8 @@ void __init early_init_devtree(void *params)
* device-tree, including the platform type, initrd location and
* size, and more ...
*/
- of_scan_flat_dt(early_init_dt_scan_chosen, NULL);
+ of_scan_flat_dt(early_init_dt_scan_chosen, arcs_cmdline);
+
/* Scan memory nodes */
of_scan_flat_dt(early_init_dt_scan_root, NULL);
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 48aeb55..f2c906b 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -694,7 +694,7 @@ void __init early_init_devtree(void *params)
* device-tree, including the platform type, initrd location and
* size, TCE reserve, and more ...
*/
- of_scan_flat_dt(early_init_dt_scan_chosen_ppc, NULL);
+ of_scan_flat_dt(early_init_dt_scan_chosen_ppc, cmd_line);
/* Scan memory nodes and rebuild MEMBLOCKs */
memblock_init();
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