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x86, aperture_64: use symbolic constants

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Factor-out common aperture_valid code.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Pavel Machek 2008-05-20 16:27:17 +02:00 committed by Thomas Gleixner
parent 538f0fd0f2
commit 0abbc78a01
3 changed files with 29 additions and 40 deletions
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23
arch/x86/kernel/aperture_64.c
View File

@ -109,27 +109,6 @@ static u32 __init allocate_aperture(void)
return (u32)__pa(p);
}
static int __init aperture_valid(u64 aper_base, u32 aper_size, u32 min_size)
{
if (!aper_base)
return 0;
if (aper_base + aper_size > 0x100000000UL) {
printk(KERN_ERR "Aperture beyond 4GB. Ignoring.\n");
return 0;
}
if (e820_any_mapped(aper_base, aper_base + aper_size, E820_RAM)) {
printk(KERN_ERR "Aperture pointing to e820 RAM. Ignoring.\n");
return 0;
}
if (aper_size < min_size) {
printk(KERN_ERR "Aperture too small (%d MB) than (%d MB)\n",
aper_size>>20, min_size>>20);
return 0;
}
return 1;
}
/* Find a PCI capability */
static __u32 __init find_cap(int bus, int slot, int func, int cap)
@ -344,7 +323,7 @@ out:
if (gart_fix_e820 && !fix && aper_enabled) {
if (!e820_all_mapped(aper_base, aper_base + aper_size,
E820_RESERVED)) {
/* reserved it, so we can resuse it in second kernel */
/* reserve it, so we can reuse it in second kernel */
printk(KERN_INFO "update e820 for GART\n");
add_memory_region(aper_base, aper_size, E820_RESERVED);
update_e820();

22
drivers/char/agp/amd64-agp.c
View File

@ -228,24 +228,10 @@ static const struct agp_bridge_driver amd_8151_driver = {
};
/* Some basic sanity checks for the aperture. */
static int __devinit aperture_valid(u64 aper, u32 size)
static int __devinit agp_aperture_valid(u64 aper, u32 size)
{
if (aper == 0) {
printk(KERN_ERR PFX "No aperture\n");
if (!aperture_valid(aper, size, 32*1024*1024))
return 0;
}
if ((u64)aper + size > 0x100000000ULL) {
printk(KERN_ERR PFX "Aperture out of bounds\n");
return 0;
}
if (e820_any_mapped(aper, aper + size, E820_RAM)) {
printk(KERN_ERR PFX "Aperture pointing to RAM\n");
return 0;
}
if (size < 32*1024*1024) {
printk(KERN_ERR PFX "Aperture too small (%d MB)\n", size>>20);
return 0;
}
/* Request the Aperture. This catches cases when someone else
already put a mapping in there - happens with some very broken BIOS
@ -282,7 +268,7 @@ static __devinit int fix_northbridge(struct pci_dev *nb, struct pci_dev *agp,
nb_order = (nb_order >> 1) & 7;
pci_read_config_dword(nb, AMD64_GARTAPERTUREBASE, &nb_base);
nb_aper = nb_base << 25;
if (aperture_valid(nb_aper, (32*1024*1024)<<nb_order)) {
if (agp_aperture_valid(nb_aper, (32*1024*1024)<<nb_order)) {
return 0;
}
@ -313,7 +299,7 @@ static __devinit int fix_northbridge(struct pci_dev *nb, struct pci_dev *agp,
}
printk(KERN_INFO PFX "Aperture from AGP @ %Lx size %u MB\n", aper, 32 << order);
if (order < 0 || !aperture_valid(aper, (32*1024*1024)<<order))
if (order < 0 || !agp_aperture_valid(aper, (32*1024*1024)<<order))
return -1;
pci_write_config_dword(nb, AMD64_GARTAPERTURECTL, order << 1);

24
include/asm-x86/gart.h
View File

@ -1,6 +1,8 @@
#ifndef _ASM_X8664_IOMMU_H
#define _ASM_X8664_IOMMU_H 1
#include <asm/e820.h>
extern void pci_iommu_shutdown(void);
extern void no_iommu_init(void);
extern int force_iommu, no_iommu;
@ -69,4 +71,26 @@ static inline void enable_gart_translation(struct pci_dev *dev, u64 addr)
pci_write_config_dword(dev, AMD64_GARTAPERTURECTL, ctl);
}
static inline int aperture_valid(u64 aper_base, u32 aper_size, u32 min_size)
{
if (!aper_base)
return 0;
if (aper_base + aper_size > 0x100000000ULL) {
printk(KERN_ERR "Aperture beyond 4GB. Ignoring.\n");
return 0;
}
if (e820_any_mapped(aper_base, aper_base + aper_size, E820_RAM)) {
printk(KERN_ERR "Aperture pointing to e820 RAM. Ignoring.\n");
return 0;
}
if (aper_size < min_size) {
printk(KERN_ERR "Aperture too small (%d MB) than (%d MB)\n",
aper_size>>20, min_size>>20);
return 0;
}
return 1;
}
#endif