linux/arch/sh/mm/ioremap_fixed.c
Mike Rapoport 57c8a661d9 mm: remove include/linux/bootmem.h
Move remaining definitions and declarations from include/linux/bootmem.h
into include/linux/memblock.h and remove the redundant header.

The includes were replaced with the semantic patch below and then
semi-automated removal of duplicated '#include <linux/memblock.h>

@@
@@
- #include <linux/bootmem.h>
+ #include <linux/memblock.h>

[sfr@canb.auug.org.au: dma-direct: fix up for the removal of linux/bootmem.h]
  Link: http://lkml.kernel.org/r/20181002185342.133d1680@canb.auug.org.au
[sfr@canb.auug.org.au: powerpc: fix up for removal of linux/bootmem.h]
  Link: http://lkml.kernel.org/r/20181005161406.73ef8727@canb.auug.org.au
[sfr@canb.auug.org.au: x86/kaslr, ACPI/NUMA: fix for linux/bootmem.h removal]
  Link: http://lkml.kernel.org/r/20181008190341.5e396491@canb.auug.org.au
Link: http://lkml.kernel.org/r/1536927045-23536-30-git-send-email-rppt@linux.vnet.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Ley Foon Tan <lftan@altera.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Serge Semin <fancer.lancer@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-10-31 08:54:16 -07:00

136 lines
2.6 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Re-map IO memory to kernel address space so that we can access it.
*
* These functions should only be used when it is necessary to map a
* physical address space into the kernel address space before ioremap()
* can be used, e.g. early in boot before paging_init().
*
* Copyright (C) 2009 Matt Fleming
*/
#include <linux/vmalloc.h>
#include <linux/ioport.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/io.h>
#include <linux/memblock.h>
#include <linux/proc_fs.h>
#include <asm/fixmap.h>
#include <asm/page.h>
#include <asm/pgalloc.h>
#include <asm/addrspace.h>
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
#include <asm/mmu.h>
#include <asm/mmu_context.h>
struct ioremap_map {
void __iomem *addr;
unsigned long size;
unsigned long fixmap_addr;
};
static struct ioremap_map ioremap_maps[FIX_N_IOREMAPS];
void __init ioremap_fixed_init(void)
{
struct ioremap_map *map;
int i;
for (i = 0; i < FIX_N_IOREMAPS; i++) {
map = &ioremap_maps[i];
map->fixmap_addr = __fix_to_virt(FIX_IOREMAP_BEGIN + i);
}
}
void __init __iomem *
ioremap_fixed(phys_addr_t phys_addr, unsigned long size, pgprot_t prot)
{
enum fixed_addresses idx0, idx;
struct ioremap_map *map;
unsigned int nrpages;
unsigned long offset;
int i, slot;
/*
* Mappings have to be page-aligned
*/
offset = phys_addr & ~PAGE_MASK;
phys_addr &= PAGE_MASK;
size = PAGE_ALIGN(phys_addr + size) - phys_addr;
slot = -1;
for (i = 0; i < FIX_N_IOREMAPS; i++) {
map = &ioremap_maps[i];
if (!map->addr) {
map->size = size;
slot = i;
break;
}
}
if (slot < 0)
return NULL;
/*
* Mappings have to fit in the FIX_IOREMAP area.
*/
nrpages = size >> PAGE_SHIFT;
if (nrpages > FIX_N_IOREMAPS)
return NULL;
/*
* Ok, go for it..
*/
idx0 = FIX_IOREMAP_BEGIN + slot;
idx = idx0;
while (nrpages > 0) {
pgprot_val(prot) |= _PAGE_WIRED;
__set_fixmap(idx, phys_addr, prot);
phys_addr += PAGE_SIZE;
idx++;
--nrpages;
}
map->addr = (void __iomem *)(offset + map->fixmap_addr);
return map->addr;
}
int iounmap_fixed(void __iomem *addr)
{
enum fixed_addresses idx;
struct ioremap_map *map;
unsigned int nrpages;
int i, slot;
slot = -1;
for (i = 0; i < FIX_N_IOREMAPS; i++) {
map = &ioremap_maps[i];
if (map->addr == addr) {
slot = i;
break;
}
}
/*
* If we don't match, it's not for us.
*/
if (slot < 0)
return -EINVAL;
nrpages = map->size >> PAGE_SHIFT;
idx = FIX_IOREMAP_BEGIN + slot + nrpages - 1;
while (nrpages > 0) {
__clear_fixmap(idx, __pgprot(_PAGE_WIRED));
--idx;
--nrpages;
}
map->size = 0;
map->addr = NULL;
return 0;
}