Felisp
84436a5ae0
http://my.svgalib.org/svgalib/svgalib-1.9.25.tar.gz http://my.svgalib.org/svgalib/
66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
/* vram size in pages */
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#ifdef __386__
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#include <linux/version.h>
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#include <asm/uaccess.h>
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#include <asm/system.h> /* cli(), *_flags */
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#include <asm/segment.h> /* memcpy and such */
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#include <asm/io.h>
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#include <asm/pgtable.h>
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#define I810_SIZE 1024
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unsigned long i810_alloc_page()
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{
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unsigned long address;
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address = __get_free_page(GFP_KERNEL);
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if(address == 0UL)
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return 0;
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
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atomic_inc(&virt_to_page(address)->count);
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set_bit(PG_locked, &virt_to_page(address)->flags);
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#endif
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return address;
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}
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#if 0
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static void i810_free_page(unsigned long page)
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{
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if(page == 0UL)
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return;
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atomic_dec(&virt_to_page(page)->count);
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clear_bit(PG_locked, &virt_to_page(page)->flags);
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wake_up(&virt_to_page(page)->wait);
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free_page(page);
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return;
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}
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#endif
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static unsigned long i810_pages[I810_SIZE];
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unsigned long i810_gttes[I810_SIZE];
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static unsigned long i810_gttpage=0;
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unsigned int i810_make_gtt() {
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int i;
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if(i810_gttpage) return virt_to_bus((void *)i810_gttpage);
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i810_gttpage=i810_alloc_page();
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for(i=0;i<I810_SIZE;i++) {
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unsigned int gtte;
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i810_pages[i]=i810_alloc_page();
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gtte=virt_to_bus((void *)i810_pages[i]);
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gtte &= 0x3ffff000;
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gtte |= 1; /* valid, system memory, not cached */
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i810_gttes[i]=gtte;
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}
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return virt_to_bus((void *)i810_gttpage);
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}
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#endif
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