18 lines
449 B
C
18 lines
449 B
C
#include <com32.h>
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#include <string.h>
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#include "pci/pci.h"
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uint32_t __pci_read_write_bios(uint32_t call, uint32_t v, pciaddr_t a)
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{
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com32sys_t rs;
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memset(&rs, 0, sizeof rs);
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rs.eax.w[0] = call;
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rs.ebx.w[0] = a >> 8; /* bus:device:function */
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rs.edi.b[0] = a; /* address:reg */
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rs.ecx.l = v;
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rs.eflags.l = EFLAGS_CF;
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__intcall(0x1a, &rs, &rs);
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return (rs.eflags.l & EFLAGS_CF) ? ~(uint32_t) 0 : rs.ecx.l;
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}
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