X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Froms%2Fseabios%2Fsrc%2Fpnpbios.c;fp=qemu%2Froms%2Fseabios%2Fsrc%2Fpnpbios.c;h=95ce21f8f2b5bf9a24f03f75274f3b479d3364d7;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git diff --git a/qemu/roms/seabios/src/pnpbios.c b/qemu/roms/seabios/src/pnpbios.c new file mode 100644 index 000000000..95ce21f8f --- /dev/null +++ b/qemu/roms/seabios/src/pnpbios.c @@ -0,0 +1,88 @@ +// PNP BIOS calls +// +// Copyright (C) 2008 Kevin O'Connor +// +// This file may be distributed under the terms of the GNU LGPLv3 license. + +#include "config.h" // BUILD_BIOS_ADDR +#include "farptr.h" // SET_FARVAR +#include "output.h" // dprintf +#include "std/pnpbios.h" // PNP_SIGNATURE +#include "string.h" // checksum +#include "util.h" // pnp_init + +extern struct pnpheader PNPHEADER; +extern char pnp_string[]; + +#if CONFIG_PNPBIOS +struct pnpheader PNPHEADER __aligned(16) VARFSEG = { + .signature = PNP_SIGNATURE, + .version = 0x10, + .length = sizeof(PNPHEADER), + .real_cs = SEG_BIOS, + .prot_base = BUILD_BIOS_ADDR, + .real_ds = SEG_BIOS, + .prot_database = BUILD_BIOS_ADDR, +}; +#else +// We need a copy of this string in the 0xf000 segment, but we are not +// actually a PnP BIOS, so make sure it is *not* aligned, so OSes will +// not see it if they scan. +char pnp_string[] __aligned(2) VARFSEG = " $PnP"; +#endif + +// BBS - Get Version and Installation Check +static u16 +handle_pnp60(u16 *args) +{ + u16 version_ptr = args[1]; + u16 version_seg = args[2]; + SET_FARVAR(version_seg, *(u16*)(version_ptr+0), 0x0101); + return 0; +} + +static u16 +handle_pnpXX(u16 *args) +{ + return FUNCTION_NOT_SUPPORTED; +} + +u16 VISIBLE16 +handle_pnp(u16 *args) +{ + if (! CONFIG_PNPBIOS) + return FUNCTION_NOT_SUPPORTED; + + u16 arg1 = args[0]; + dprintf(DEBUG_HDL_pnp, "pnp call arg1=%x\n", arg1); + + switch (arg1) { + case 0x60: return handle_pnp60(args); + default: return handle_pnpXX(args); + } +} + +u16 +get_pnp_offset(void) +{ + if (! CONFIG_PNPBIOS) + return (u32)pnp_string + 1 - BUILD_BIOS_ADDR; + return (u32)&PNPHEADER - BUILD_BIOS_ADDR; +} + +// romlayout.S +extern void entry_pnp_real(void); +extern void entry_pnp_prot(void); + +void +pnp_init(void) +{ + if (! CONFIG_PNPBIOS) + return; + + dprintf(3, "init PNPBIOS table\n"); + + PNPHEADER.real_ip = (u32)entry_pnp_real - BUILD_BIOS_ADDR; + PNPHEADER.prot_ip = (u32)entry_pnp_prot - BUILD_BIOS_ADDR; + PNPHEADER.checksum -= checksum(&PNPHEADER, sizeof(PNPHEADER)); +}