672c54466d
The physical address is never used by the device tree code when allocating memory for unflattening. Change the architecture's alloc hook to return the virutal address instead. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
110 lines
2.8 KiB
C
110 lines
2.8 KiB
C
/*
|
|
* MIPS support for CONFIG_OF device tree support
|
|
*
|
|
* Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.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/initrd.h>
|
|
#include <linux/debugfs.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_fdt.h>
|
|
#include <linux/of_irq.h>
|
|
#include <linux/of_platform.h>
|
|
|
|
#include <asm/page.h>
|
|
#include <asm/prom.h>
|
|
|
|
int __init early_init_dt_scan_memory_arch(unsigned long node,
|
|
const char *uname, int depth,
|
|
void *data)
|
|
{
|
|
return early_init_dt_scan_memory(node, uname, depth, data);
|
|
}
|
|
|
|
void __init early_init_dt_add_memory_arch(u64 base, u64 size)
|
|
{
|
|
return add_memory_region(base, size, BOOT_MEM_RAM);
|
|
}
|
|
|
|
int __init reserve_mem_mach(unsigned long addr, unsigned long size)
|
|
{
|
|
return reserve_bootmem(addr, size, BOOTMEM_DEFAULT);
|
|
}
|
|
|
|
void __init free_mem_mach(unsigned long addr, unsigned long size)
|
|
{
|
|
return free_bootmem(addr, size);
|
|
}
|
|
|
|
void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
|
|
{
|
|
return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
|
|
}
|
|
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
void __init early_init_dt_setup_initrd_arch(unsigned long start,
|
|
unsigned long end)
|
|
{
|
|
initrd_start = (unsigned long)__va(start);
|
|
initrd_end = (unsigned long)__va(end);
|
|
initrd_below_start_ok = 1;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* 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);
|
|
|
|
void __init early_init_devtree(void *params)
|
|
{
|
|
/* Setup flat device-tree pointer */
|
|
initial_boot_params = params;
|
|
|
|
/* Retrieve various informations from the /chosen node of the
|
|
* device-tree, including the platform type, initrd location and
|
|
* size, and more ...
|
|
*/
|
|
of_scan_flat_dt(early_init_dt_scan_chosen, NULL);
|
|
|
|
/* Scan memory nodes */
|
|
of_scan_flat_dt(early_init_dt_scan_root, NULL);
|
|
of_scan_flat_dt(early_init_dt_scan_memory_arch, NULL);
|
|
}
|
|
|
|
void __init device_tree_init(void)
|
|
{
|
|
unsigned long base, size;
|
|
|
|
if (!initial_boot_params)
|
|
return;
|
|
|
|
base = virt_to_phys((void *)initial_boot_params);
|
|
size = be32_to_cpu(initial_boot_params->totalsize);
|
|
|
|
/* Before we do anything, lets reserve the dt blob */
|
|
reserve_mem_mach(base, size);
|
|
|
|
unflatten_device_tree();
|
|
|
|
/* free the space reserved for the dt blob */
|
|
free_mem_mach(base, size);
|
|
}
|