diff options
| author | Pavel Machek <pavel@ucw.cz> | 2008-05-20 16:27:17 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2008-05-22 11:35:14 +0200 |
| commit | 0abbc78a0137fee60ef092f0b20a3d3d7e7e0cc2 (patch) | |
| tree | 861c8de86a39a9c3235f949dcad01ba96cfb18c6 /include/asm-x86/gart.h | |
| parent | 538f0fd0f210c2ce5c585799f18d0e5c7cf6155e (diff) | |
x86, aperture_64: use symbolic constants
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>
Diffstat (limited to 'include/asm-x86/gart.h')
| -rw-r--r-- | include/asm-x86/gart.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/asm-x86/gart.h b/include/asm-x86/gart.h index 6f22786d2f0..c818b96f936 100644 --- a/include/asm-x86/gart.h +++ b/include/asm-x86/gart.h @@ -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 |