| 1 | |
| 2 | |
| 3 | * EISA specific code
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| 4 |
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| 5 | #include <linux/cc_platform.h>
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| 6 | #include <linux/ioport.h>
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| 7 | #include <linux/eisa.h>
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| 8 | #include <linux/io.h>
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| 9 |
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| 10 | #include <xen/xen.h>
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| 11 |
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| 12 | static __init int eisa_bus_probe(void)
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| 13 | {
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| 14 | u32 *p;
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| 15 |
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| 16 | if ((xen_pv_domain() && !xen_initial_domain()) || cc_platform_has(CC_ATTR_GUEST_SEV_SNP))
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| 17 | return 0;
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| 18 |
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| 19 | p = memremap(0x0FFFD9, 4, MEMREMAP_WB);
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| 20 | if (p && *p == 'E' + ('I' << 8) + ('S' << 16) + ('A' << 24))
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| 21 | EISA_bus = 1;
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| 22 | memunmap(p);
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| 23 | return 0;
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| 24 | }
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| 25 | subsys_initcall(eisa_bus_probe);
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