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authorYang Zhang <yang.z.zhang@intel.com>2015-08-28 09:58:54 +0800
committerYang Zhang <yang.z.zhang@intel.com>2015-09-01 12:44:00 +0800
commite44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch)
tree66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/seabios/src/pnpbios.c
parent9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff)
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/seabios/src/pnpbios.c')
-rw-r--r--qemu/roms/seabios/src/pnpbios.c88
1 files changed, 88 insertions, 0 deletions
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 <kevin@koconnor.net>
+//
+// 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));
+}