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x86: Move paging functions into cpu.c

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These functions really don't belong in physmem as they relate to the
cpu. Move them.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2014-10-10 08:21:52 -06:00
parent 6c499abe05
commit 7bddac947d
3 changed files with 60 additions and 30 deletions
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35
arch/x86/cpu/cpu.c
View file

@ -240,3 +240,38 @@ int icache_status(void)
{
return 1;
}
void cpu_enable_paging_pae(ulong cr3)
{
__asm__ __volatile__(
/* Load the page table address */
"movl %0, %%cr3\n"
/* Enable pae */
"movl %%cr4, %%eax\n"
"orl $0x00000020, %%eax\n"
"movl %%eax, %%cr4\n"
/* Enable paging */
"movl %%cr0, %%eax\n"
"orl $0x80000000, %%eax\n"
"movl %%eax, %%cr0\n"
:
: "r" (cr3)
: "eax");
}
void cpu_disable_paging_pae(void)
{
/* Turn off paging */
__asm__ __volatile__ (
/* Disable paging */
"movl %%cr0, %%eax\n"
"andl $0x7fffffff, %%eax\n"
"movl %%eax, %%cr0\n"
/* Disable pae */
"movl %%cr4, %%eax\n"
"andl $0xffffffdf, %%eax\n"
"movl %%eax, %%cr4\n"
:
:
: "eax");
}

22
arch/x86/include/asm/cpu.h Normal file
View file

@ -0,0 +1,22 @@
/*
* Copyright (c) 2014 The Chromium OS Authors.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __X86_CPU_H
#define __X86_CPU_H
/**
* cpu_enable_paging_pae() - Enable PAE-paging
*
* @pdpt: Value to set in cr3 (PDPT or PML4T)
*/
void cpu_enable_paging_pae(ulong cr3);
/**
* cpu_disable_paging_pae() - Disable paging and PAE
*/
void cpu_disable_paging_pae(void);
#endif

33
arch/x86/lib/physmem.c
View file

@ -10,6 +10,7 @@
#include <common.h>
#include <physmem.h>
#include <asm/cpu.h>
#include <linux/compiler.h>
DECLARE_GLOBAL_DATA_PTR;
@ -112,41 +113,13 @@ static void x86_phys_enter_paging(void)
x86_phys_map_page(page_addr, page_addr, 0);
}
/* Turn on paging */
__asm__ __volatile__(
/* Load the page table address */
"movl %0, %%cr3\n\t"
/* Enable pae */
"movl %%cr4, %%eax\n\t"
"orl $0x00000020, %%eax\n\t"
"movl %%eax, %%cr4\n\t"
/* Enable paging */
"movl %%cr0, %%eax\n\t"
"orl $0x80000000, %%eax\n\t"
"movl %%eax, %%cr0\n\t"
:
: "r" (pdpt)
: "eax"
);
cpu_enable_paging_pae((ulong)pdpt);
}
/* Disable paging and PAE mode. */
static void x86_phys_exit_paging(void)
{
/* Turn off paging */
__asm__ __volatile__ (
/* Disable paging */
"movl %%cr0, %%eax\n\t"
"andl $0x7fffffff, %%eax\n\t"
"movl %%eax, %%cr0\n\t"
/* Disable pae */
"movl %%cr4, %%eax\n\t"
"andl $0xffffffdf, %%eax\n\t"
"movl %%eax, %%cr4\n\t"
:
:
: "eax"
);
cpu_disable_paging_pae();
}
/*