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author | Stephen Rothwell <sfr@canb.auug.org.au> | 2011-07-25 13:59:46 -0400 |
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committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2011-07-25 14:53:52 -0400 |
commit | 5f00bcb38ef9a980a33c6dbdc0044964b05f22dd (patch) | |
tree | 3175fb9375aecb50bde1be0bf4fa8aa8155131d6 /arch/openrisc/kernel/prom.c | |
parent | 34006cee28f7344f9557a4be3816c7891b1bbab1 (diff) | |
parent | b6844e8f64920cdee620157252169ba63afb0c89 (diff) |
Merge branch 'master' into devel and apply fixup from Stephen Rothwell:
vfs/nfs: fixup for nfs_open_context change
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'arch/openrisc/kernel/prom.c')
-rw-r--r-- | arch/openrisc/kernel/prom.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/arch/openrisc/kernel/prom.c b/arch/openrisc/kernel/prom.c new file mode 100644 index 00000000000..1bb58ba89af --- /dev/null +++ b/arch/openrisc/kernel/prom.c @@ -0,0 +1,108 @@ +/* + * OpenRISC prom.c + * + * Linux architectural port borrowing liberally from similar works of + * others. All original copyrights apply as per the original source + * declaration. + * + * Modifications for the OpenRISC architecture: + * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * Architecture specific procedures for creating, accessing and + * interpreting the device tree. + * + */ + +#include <stdarg.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/init.h> +#include <linux/threads.h> +#include <linux/spinlock.h> +#include <linux/types.h> +#include <linux/pci.h> +#include <linux/stringify.h> +#include <linux/delay.h> +#include <linux/initrd.h> +#include <linux/bitops.h> +#include <linux/module.h> +#include <linux/kexec.h> +#include <linux/debugfs.h> +#include <linux/irq.h> +#include <linux/memblock.h> +#include <linux/of_fdt.h> + +#include <asm/prom.h> +#include <asm/page.h> +#include <asm/processor.h> +#include <asm/irq.h> +#include <linux/io.h> +#include <asm/system.h> +#include <asm/mmu.h> +#include <asm/pgtable.h> +#include <asm/sections.h> +#include <asm/setup.h> + +extern char cmd_line[COMMAND_LINE_SIZE]; + +void __init early_init_dt_add_memory_arch(u64 base, u64 size) +{ + size &= PAGE_MASK; + memblock_add(base, size); +} + +void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) +{ + return __va(memblock_alloc(size, align)); +} + +void __init early_init_devtree(void *params) +{ + void *alloc; + + /* 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, TCE reserve, and more ... + */ + of_scan_flat_dt(early_init_dt_scan_chosen, cmd_line); + + /* Scan memory nodes and rebuild MEMBLOCKs */ + memblock_init(); + of_scan_flat_dt(early_init_dt_scan_root, NULL); + of_scan_flat_dt(early_init_dt_scan_memory, NULL); + + /* Save command line for /proc/cmdline and then parse parameters */ + strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE); + + memblock_analyze(); + + /* We must copy the flattend device tree from init memory to regular + * memory because the device tree references the strings in it + * directly. + */ + + alloc = __va(memblock_alloc(initial_boot_params->totalsize, PAGE_SIZE)); + + memcpy(alloc, initial_boot_params, initial_boot_params->totalsize); + + initial_boot_params = alloc; +} + +#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 |