m68k/sun3: Dynamically allocate the table to track IOMMU use
As Sun 3 kernels cannot be multi-platform due to the different Sun 3 MMU type, it made sense to statically allocate the table to track IOMMU use. However, Sun 3x kernels can be multi-platform. Furthermore, Sun 3x uses a larger table than Sun 3 (8192 bytes instead of 512 bytes). Hence switch to dynamic allocation of this table using the bootmem allocator to avoid wasting 8192 bytes when not running on a Sun 3x. As this allocator returns zeroed memory, there's no need to explicitly initialize the table to zeroes. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
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@ -6,6 +6,7 @@
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* Contains common routines for sun3/sun3x DVMA management.
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*/
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#include <linux/bootmem.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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@ -31,7 +32,7 @@ static inline void dvma_unmap_iommu(unsigned long a, int b)
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extern void sun3_dvma_init(void);
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#endif
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static unsigned long iommu_use[IOMMU_TOTAL_ENTRIES];
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static unsigned long *iommu_use;
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#define dvma_index(baddr) ((baddr - DVMA_START) >> DVMA_PAGE_SHIFT)
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@ -266,7 +267,7 @@ void __init dvma_init(void)
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list_add(&(hole->list), &hole_list);
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memset(iommu_use, 0, sizeof(iommu_use));
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iommu_use = alloc_bootmem(IOMMU_TOTAL_ENTRIES * sizeof(unsigned long));
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dvma_unmap_iommu(DVMA_START, DVMA_SIZE);
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